/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){-webkit-appearance:button;appearance:button}::file-selector-button{-webkit-appearance:button;appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.block{display:block}.rounded{border-radius:.25rem}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}}:root{--ink:#141715;--paper:#f3f0e7;--white:#fbfaf5;--lime:#d9ff3f;--green:#91e6b8;--coral:#ff9f84;--cyan:#7ee8f2;--orange:#ff6b35;--blue:#b8e7ff;--violet:#d6c5ff;--pink:#ffc8da;--yellow:#ffe45e;--line:#858982;--muted:#5f625e}*{box-sizing:border-box}html{scroll-padding-top:74px}body{background:var(--paper);color:var(--ink);margin:0;font-family:Arial,Hiragino Kaku Gothic ProN,Yu Gothic,sans-serif}button,input,select{font:inherit}button,summary,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}:is(button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible){outline:3px solid var(--ink);outline-offset:3px;box-shadow:0 0 0 6px #fff}#main-content:focus{outline-offset:-5px;outline:3px solid #005ea8}.skip-link{z-index:1000;color:#111827;background:#fff;border-radius:8px;padding:10px 14px;font-weight:800;transition:transform .15s;position:fixed;top:12px;left:12px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}.sr-only{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}.section{border-bottom:1px solid var(--ink);padding:105px 6vw 120px}.site-header{z-index:30;border-bottom:1px solid var(--ink);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f3f0e7f2;justify-content:space-between;align-items:center;height:74px;padding:0 4.5vw;display:flex;position:sticky;top:0}.brand{white-space:nowrap;align-items:baseline;gap:14px;display:flex}.brand span{letter-spacing:-.09em;font-size:24px;font-weight:950}.brand b{letter-spacing:.2em;font-size:8px}.site-header nav{align-items:center;gap:24px;font-size:10px;font-weight:800;display:flex}.site-header nav>a:not(.header-cta){position:relative}.site-header nav>a:not(.header-cta):after{content:"";background:var(--ink);height:2px;transition:right .2s;position:absolute;bottom:-5px;left:0;right:100%}.site-header nav>a:hover:after{right:0}.header-cta{background:var(--ink);color:#fff;padding:13px 17px}.mobile-search-link{display:none}.hero{border-bottom:1px solid var(--ink);grid-template-columns:1.17fr .83fr;min-height:calc(100vh - 74px);display:grid}.hero>*{min-width:0}.hero-copy{flex-direction:column;justify-content:center;padding:78px 6vw 65px;display:flex}.eyebrow{letter-spacing:.2em;margin:0 0 34px;font-size:8px;font-weight:900}.hero h1{letter-spacing:-.095em;text-wrap:balance;max-width:800px;margin:0;font-size:clamp(64px,7vw,110px);line-height:.92}.hero h1 em{color:#b83b00;font-style:normal}.lead{max-width:690px;margin:40px 0 34px;font-size:14px;font-weight:600;line-height:2}.hero-search{max-width:680px}.hero-search label{margin-bottom:9px;font-size:9px;font-weight:900;display:block}.hero-search>div{border:1px solid var(--ink);height:62px;box-shadow:7px 7px 0 var(--ink);background:#fff;align-items:center;display:flex}.hero-search span{padding:0 15px;font:35px/1 Georgia,serif;transform:rotate(-18deg)}.hero-search input{background:0 0;border:0;flex:1;align-self:stretch;min-width:0;padding:0;font-size:13px}.hero-search button{border:0;border-left:1px solid var(--ink);background:var(--lime);color:var(--ink);cursor:pointer;align-self:stretch;padding:0 18px;font-size:9px;font-weight:900}kbd{border:1px solid var(--line);color:var(--muted);background:#f3f2ed;border-radius:2px;margin-right:12px;padding:5px 8px;font:10px/1 Arial}.hero-links{gap:9px;max-width:680px;margin-top:28px;display:flex}.hero-links a{border:1px solid var(--ink);flex:1;justify-content:space-between;padding:14px 16px;font-size:9px;font-weight:900;display:flex}.hero-links a:first-child{background:var(--lime)}.hero-links a:last-child{color:#fff;background:var(--ink)}.hero-links span{font-size:13px}.hero-board{background:var(--ink);color:#fff;flex-direction:column;padding:54px 3vw 42px;display:flex}.board-head{letter-spacing:.13em;border-bottom:1px solid #4d514e;justify-content:space-between;padding-bottom:20px;font-size:9px;display:flex}.board-row{border-bottom:1px solid #363b37;grid-template-columns:40px 100px 1fr;align-items:center;min-height:76px;display:grid}.board-row>span{color:var(--lime);font-size:9px;font-weight:900}.board-row strong{font-size:20px}.board-row small{color:#aeb4b0;font-size:9px}.board-note{color:var(--ink);background:var(--orange);margin-top:auto;padding:22px}.board-note span{letter-spacing:.14em;font-size:8px;font-weight:900}.board-note p{margin:15px 0 0;font-size:11px;line-height:1.8}.metric-strip{border-bottom:1px solid var(--ink);background:var(--white);grid-template-columns:repeat(4,1fr);display:grid}.metric-strip>div{border-right:1px solid var(--ink);grid-template-columns:1fr auto;align-items:end;min-height:150px;padding:24px 2.5vw;display:grid}.metric-strip>div:last-child{background:var(--lime);border-right:0}.metric-strip span{color:var(--muted);letter-spacing:.17em;grid-column:1/-1;align-self:start;font-size:8px;font-weight:900}.metric-strip strong{letter-spacing:-.08em;font-size:50px;line-height:.9}.metric-strip small{max-width:100px;color:var(--muted);text-align:right;font-size:8px;line-height:1.6}.section-heading{grid-template-columns:1fr 1fr;align-items:end;gap:10vw;margin-bottom:58px;display:grid}.section-heading>div>p,.standard-copy>p:first-child,.sources-section>div>p{color:var(--muted);letter-spacing:.18em;margin:0 0 22px;font-size:8px;font-weight:900}.section-heading h2,.standard-copy h2{letter-spacing:-.08em;text-wrap:balance;margin:0;font-size:clamp(46px,5vw,75px);line-height:1.02}.section-intro{max-width:620px;color:var(--muted);margin:0;font-size:14px;line-height:1.95}.section-heading.light>div>p,.section-heading.light .section-intro{color:#aab0ac}.coverage-section{background:#fffdf6}.gap-layout{border:1px solid var(--ink);grid-template-columns:1.1fr .9fr;display:grid}.gap-list{background:var(--white)}.gap-list button{border:0;border-bottom:1px solid var(--line);width:100%;min-height:78px;color:var(--ink);text-align:left;cursor:pointer;background:0 0;grid-template-columns:45px 1fr 90px 25px;align-items:center;padding:0 22px;display:grid}.gap-list button:last-child{border-bottom:0}.gap-list button:hover,.gap-list button.active{background:var(--lime)}.gap-list button>span{font-size:9px;font-weight:900}.gap-list button strong{font-size:16px}.gap-list button small{border:1px solid var(--ink);justify-self:start;padding:6px 8px;font-size:7px;font-weight:900}.gap-list button b{justify-self:end;font-size:20px;transition:transform .2s}.gap-list button.active b{transform:rotate(45deg)}.gap-detail{background:var(--ink);color:#fff;flex-direction:column;padding:42px;display:flex}.gap-detail>div>p{color:var(--lime);letter-spacing:.15em;margin:0 0 30px;font-size:8px;font-weight:900}.gap-detail h3{letter-spacing:-.06em;margin:0 0 40px;font-size:36px;line-height:1.25}.gap-detail dl{margin:0}.gap-detail dl div{border-top:1px solid #424844;grid-template-columns:65px 1fr;padding:18px 0;display:grid}.gap-detail dt{color:#9fa6a1;font-size:8px;font-weight:900}.gap-detail dd{margin:0;font-size:11px;line-height:1.9}.audit-note{color:#aeb4b0;border-top:1px solid #424844;margin:auto 0 0;padding-top:26px;font-size:9px;line-height:1.9}.curriculum-section{background:var(--ink);color:#fff}.course-tabs{overscroll-behavior-inline:contain;scrollbar-width:thin;scrollbar-color:var(--lime) #313632;gap:6px;margin-bottom:22px;padding:3px 3px 8px;display:flex;overflow-x:auto}.course-tabs::-webkit-scrollbar{height:4px}.course-tabs::-webkit-scrollbar-track{background:#313632}.course-tabs::-webkit-scrollbar-thumb{background:var(--lime)}.course-tabs button{color:#fff;cursor:pointer;background:0 0;border:1px solid #4c524e;flex:none;min-width:86px;min-height:44px;padding:12px 14px;font-size:9px;font-weight:900}.course-tabs button span{color:#909792;margin-left:10px;font-size:7px}.course-tabs button.active{color:var(--ink);background:var(--lime);border-color:var(--lime)}.course-tabs button.active span{color:var(--ink)}.unit-list{border-top:1px solid #4d534f}.course-block{border-bottom:1px solid #4d534f;grid-template-columns:210px 1fr;display:grid}.course-marker{min-height:215px;color:var(--ink);background:var(--lime);flex-direction:column;align-self:start;padding:25px;display:flex;position:sticky;top:95px}.course-block.green .course-marker{background:var(--green)}.course-block.coral .course-marker{background:var(--coral)}.course-block.cyan .course-marker{background:var(--cyan)}.course-block.orange .course-marker{background:var(--orange)}.course-block.blue .course-marker{background:var(--blue)}.course-block.violet .course-marker{background:var(--violet)}.course-block.pink .course-marker{background:var(--pink)}.course-block.yellow .course-marker{background:var(--yellow)}.course-marker span{letter-spacing:-.07em;font-size:32px;font-weight:950}.course-marker small{margin-top:8px;font-size:8px;font-weight:800}.course-marker strong{letter-spacing:-.08em;align-self:end;margin-top:auto;font-size:70px;line-height:.8}.course-units details{border-bottom:1px solid #383e3a}.course-units details:last-child{border-bottom:0}.course-units summary{cursor:pointer;grid-template-columns:42px 1fr 110px 25px;align-items:center;gap:15px;min-height:115px;padding:20px 28px;list-style:none;display:grid}.course-units summary::-webkit-details-marker{display:none}.course-units summary:hover{background:#1d221f}.course-units summary>span{color:var(--lime);font-size:8px;font-weight:900}.course-units summary h3{margin:0 0 8px;font-size:22px}.course-units summary p{color:#c2c7c3;margin:0;font-size:11px;line-height:1.7}.course-units summary small{color:#909792;text-align:right;font-size:8px;font-weight:900}.course-units summary>b{justify-self:end;font-size:21px;transition:transform .2s}.course-units details[open] summary>b{transform:rotate(45deg)}.topic-cloud{flex-wrap:wrap;gap:6px;padding:4px 28px 30px 85px;display:flex}.topic-cloud a{color:#fff;cursor:pointer;background:#242925;border:1px solid #4a504c;align-items:center;min-height:44px;padding:9px 11px;font-size:10px;display:inline-flex}.topic-cloud a:hover{border-color:var(--lime);color:var(--ink);background:var(--lime)}.topic-cloud a span{color:#87908a;margin-right:7px;font:700 8px/1 Arial}.topic-cloud a:hover span{color:var(--ink)}.type-section{background:var(--ink);color:#fff}.type-section .section-heading h2{font-size:clamp(46px,4.6vw,68px)}.analysis-axes{border-top:1px solid #515752;border-left:1px solid #515752;grid-template-columns:repeat(4,1fr);display:grid}.analysis-axes article{border-bottom:1px solid #515752;border-right:1px solid #515752;min-height:180px;padding:23px}.analysis-axes span{color:var(--cyan);letter-spacing:.14em;font-size:8px;font-weight:900}.analysis-axes h3{margin:32px 0 10px;font-size:20px}.analysis-axes p{color:#aab0ac;margin:0;font-size:9px;line-height:1.8}.type-grid{border-top:1px solid #515752;border-left:1px solid #515752;grid-template-columns:repeat(3,1fr);margin-top:35px;display:grid}.type-grid button{color:#fff;text-align:left;cursor:pointer;background:0 0;border:1px solid #515752;border-top:0;border-left:0;flex-direction:column;min-height:240px;padding:22px;display:flex}.type-grid button:hover{background:var(--lime);color:var(--ink)}.type-grid button>span{color:var(--lime);font-size:8px;font-weight:900}.type-grid button:hover>span{color:var(--ink)}.type-grid strong{margin:28px 0 12px;font-size:21px}.type-grid p{color:#c2c7c3;margin:0;font-size:11px;line-height:1.8}.type-grid button:hover p{color:var(--ink)}.type-grid small{border-top:1px solid #515752;justify-content:space-between;width:100%;margin-top:auto;padding-top:14px;font-size:8px;font-weight:900;display:flex}.type-grid button:hover small{border-color:var(--ink)}.composite-panel{border:1px solid #515752;grid-template-columns:.72fr 1.28fr;margin-top:35px;display:grid}.composite-panel>div{background:var(--cyan);color:var(--ink);padding:28px}.composite-panel>div span{letter-spacing:.14em;font-size:9px;font-weight:900}.composite-panel>div h3{letter-spacing:-.05em;margin:35px 0 15px;font-size:29px}.composite-panel>div p{margin:0;font-size:11px;line-height:1.9}.composite-panel ol{grid-template-columns:repeat(2,1fr);margin:0;padding:0;list-style:none;display:grid}.composite-panel li{border-bottom:1px solid #515752;border-left:1px solid #515752;align-items:center;gap:13px;min-height:58px;padding:13px;font-size:10px;display:flex}.composite-panel li:nth-last-child(-n+2){border-bottom:0}.composite-panel li span{color:var(--lime);font-size:8px;font-weight:900}.common-test-panel>div{background:var(--violet);color:var(--ink)}.common-test-panel li span{min-width:34px;color:var(--cyan)}.dictionary-section{background:#f6f4ec}.dictionary-toolbar{grid-template-columns:minmax(260px,1fr) 125px 210px 160px 125px;gap:9px;display:grid}.finder-search{border:1px solid var(--ink);min-height:62px;box-shadow:6px 6px 0 var(--ink);background:#fff;align-items:center;display:flex}.finder-search>span{padding:0 16px;font:32px/1 Georgia;transform:rotate(-15deg)}.finder-search input{background:0 0;border:0;flex:1;align-self:stretch;min-width:0;padding:0;font-size:12px}.finder-search button{background:var(--ink);color:#fff;cursor:pointer;border:0;width:44px;height:44px;margin-right:8px}.finder-field{border:1px solid var(--ink);background:var(--white);flex-direction:column;gap:3px;min-width:0;padding:8px 10px 7px;display:flex}.finder-field>span{color:var(--muted);letter-spacing:.08em;font-size:7px;font-weight:900}.finder-field select{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;flex:1;padding:0;font-size:10px;font-weight:800}.reset-button{border:1px solid var(--ink);background:var(--orange);cursor:pointer;min-width:0;padding:0 13px;font-size:9px;font-weight:800}.reset-button:disabled{color:#61645f;opacity:1;cursor:not-allowed;background:#deddd5;border-color:#92958f}.result-line{color:var(--muted);justify-content:space-between;margin:30px 0 14px;font-size:9px;display:flex}.result-line p{margin:0}.result-line strong{color:var(--ink);font-size:13px}.result-line a{color:var(--ink);text-underline-offset:3px;font-weight:900;text-decoration:underline}.export-links a{align-items:center;min-height:44px;padding:0 6px;display:inline-flex}.active-filters{color:var(--muted);font-size:9px}.pattern-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.pattern-card{border:1px solid var(--line);background:var(--white);flex-direction:column;min-height:385px;padding:21px;display:flex}.pattern-card:hover{border-color:var(--ink);box-shadow:5px 5px 0 var(--ink);transform:translateY(-2px)}.pattern-meta{justify-content:space-between;align-items:center;display:flex}.pattern-meta span{background:var(--lime);padding:5px 8px;font-size:8px;font-weight:900}.pattern-card.green .pattern-meta span{background:var(--green)}.pattern-card.coral .pattern-meta span{background:var(--coral)}.pattern-card.cyan .pattern-meta span{background:var(--cyan)}.pattern-card.orange .pattern-meta span{background:var(--orange)}.pattern-card.blue .pattern-meta span{background:var(--blue)}.pattern-card.violet .pattern-meta span{background:var(--violet)}.pattern-card.pink .pattern-meta span{background:var(--pink)}.pattern-card.yellow .pattern-meta span{background:var(--yellow)}.pattern-meta b{color:var(--muted);letter-spacing:.1em;font-size:9px}.pattern-card>p{color:var(--muted);margin:24px 0 5px;font-size:12px;font-weight:800}.pattern-card h3{letter-spacing:-.03em;min-height:51px;margin:0 0 18px;font-size:18px;line-height:1.55}.pattern-card dl{margin:0 0 20px}.pattern-card dl div{border-top:1px solid #dadbd4;grid-template-columns:40px 1fr;padding:8px 0;display:grid}.pattern-card dt{color:var(--muted);font-size:9px;font-weight:900}.pattern-card dd{color:var(--muted);margin:0;font-size:12px;line-height:1.65}.pattern-card>a,.planned{border-top:1px solid var(--ink);justify-content:space-between;align-items:center;min-height:44px;margin-top:auto;padding-top:13px;font-size:10px;font-weight:900;display:flex}.pattern-card>a{color:#465300}.planned{color:var(--muted)}.planned b{letter-spacing:.1em;font-size:7px}.load-more{border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;width:100%;margin-top:22px;padding:19px;font-size:10px;font-weight:900}.load-more span{color:var(--lime);margin-left:12px;font-size:8px}.empty-state{border:1px dashed var(--line);text-align:center;padding:75px 30px}.empty-state strong{font-size:22px}.empty-state p{color:var(--muted);font-size:10px}.empty-state button{background:var(--ink);color:#fff;cursor:pointer;border:0;margin-top:15px;padding:11px 17px;font-size:9px}.cross-section{background:var(--ink);color:#fff}.cross-grid{border-top:1px solid #515752;border-left:1px solid #515752;grid-template-columns:repeat(3,1fr);display:grid}.cross-grid article{border-bottom:1px solid #515752;border-right:1px solid #515752;flex-direction:column;min-height:300px;padding:25px;display:flex}.cross-grid article:nth-child(2),.cross-grid article:nth-child(6){background:#202620}.cross-grid>article>span{color:var(--lime);font-size:9px;font-weight:900}.cross-grid h3{margin:35px 0 14px;font-size:22px}.cross-grid p{color:#a8afa9;margin:0;font-size:9px;line-height:1.9}.cross-grid article>div{flex-wrap:wrap;gap:5px;margin-top:auto;display:flex}.cross-grid small{color:#c9cec9;border:1px solid #4b514c;padding:6px 8px;font-size:7px}.cross-grid button{border:1px solid var(--lime);color:var(--lime);text-align:left;cursor:pointer;background:0 0;margin-top:16px;padding:11px 12px;font-size:9px;font-weight:900}.article-standard{background:var(--orange);grid-template-columns:.8fr 1.2fr;gap:9vw;display:grid}.standard-copy{align-self:start;position:sticky;top:110px}.standard-copy>p:not(:first-child){max-width:480px;margin:35px 0;font-size:11px;line-height:2}.standard-copy>a{background:var(--ink);color:#fff;justify-content:space-between;max-width:330px;padding:15px;font-size:9px;font-weight:900;display:flex}.standard-list{border-top:1px solid var(--ink);margin:0;padding:0;list-style:none}.standard-list li{border-bottom:1px solid var(--ink);grid-template-columns:55px 1fr;align-items:center;min-height:64px;display:grid}.standard-list span{font-size:9px;font-weight:900}.standard-list strong{font-size:16px}.roadmap-section{background:#f3f1e8}.roadmap-grid{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(4,1fr);display:grid}.roadmap-grid article{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--white);flex-direction:column;min-height:280px;padding:22px;display:flex}.roadmap-grid article:first-child{background:var(--lime)}.roadmap-grid article:nth-child(3){background:var(--blue)}.roadmap-grid article>span{letter-spacing:.12em;font-size:8px;font-weight:900}.roadmap-grid article>strong{margin:30px 0 13px;font-size:54px;line-height:.8}.roadmap-grid h3{margin:0 0 13px;font-size:22px}.roadmap-grid p{color:var(--muted);margin:0;font-size:9px;line-height:1.8}.roadmap-grid small{border-top:1px solid var(--ink);margin-top:auto;padding-top:13px;font-size:8px;font-weight:900}.scale-caption{border:1px solid var(--ink);background:var(--yellow);grid-template-columns:180px 1fr;gap:10px 30px;margin-top:65px;padding:24px;display:grid}.scale-caption span{letter-spacing:.14em;font-size:8px;font-weight:900}.scale-caption strong{font-size:22px}.scale-caption p{color:var(--muted);grid-column:2;margin:0;font-size:12px;line-height:1.8}.scale-table{border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);margin-top:0;display:grid}.scale-table>div{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);justify-content:space-between;align-items:end;min-height:75px;padding:18px;display:flex}.scale-table span{font-size:9px;font-weight:800}.scale-table b{font-size:18px}.scale-table .total{background:var(--ink);color:#fff}.scale-table .total b{color:var(--lime)}.sources-section{border-bottom:1px solid var(--ink);background:#e4e5dd;grid-template-columns:.7fr 1.3fr;gap:7vw;padding:75px 6vw;display:grid}.sources-section h2{letter-spacing:-.05em;margin:0;font-size:32px}.sources-section>p{color:var(--muted);margin:0;font-size:10px;line-height:2}.source-links{flex-wrap:wrap;grid-column:2;gap:7px;display:flex}.source-links a{border:1px solid var(--line);background:var(--white);align-items:center;min-height:44px;padding:10px 12px;font-size:8px;font-weight:800;display:inline-flex}.source-links a:hover{border-color:var(--ink)}.final-cta{text-align:center;background:var(--lime);min-height:540px;padding:95px 7vw}.final-cta>p{margin:0 0 25px;font-size:10px;font-weight:900}.final-cta h2{letter-spacing:-.085em;text-wrap:balance;margin:0;font-size:clamp(48px,6.5vw,90px);line-height:1.02}.final-cta>div{justify-content:center;gap:8px;margin-top:45px;display:flex}.final-cta a{border:1px solid var(--ink);background:var(--ink);color:#fff;justify-content:space-between;min-width:230px;padding:16px;font-size:9px;font-weight:900;display:flex}.final-cta a:last-child{color:var(--ink);background:0 0}footer{background:var(--ink);color:#fff;align-items:center;gap:28px;min-height:110px;padding:26px 4.5vw;display:flex}footer p{color:#8d958f;margin-right:auto;font-size:8px}footer>span{color:#8d958f;font-size:8px}.pattern-analysis-page{background:#f8f6ee;min-height:100vh}.pattern-analysis-hero{border-bottom:1px solid var(--ink);background:var(--lime);grid-template-columns:1.15fr .85fr;gap:7vw;padding:68px 7vw 72px;display:grid}.pattern-analysis-hero.green{background:var(--green)}.pattern-analysis-hero.coral{background:var(--coral)}.pattern-analysis-hero.cyan{background:var(--cyan)}.pattern-analysis-hero.orange{background:var(--orange)}.pattern-analysis-hero.blue{background:var(--blue)}.pattern-analysis-hero.violet{background:var(--violet)}.pattern-analysis-hero.pink{background:var(--pink)}.pattern-analysis-hero.yellow{background:var(--yellow)}.pattern-analysis-hero .breadcrumbs{letter-spacing:.1em;grid-column:1/-1;margin:0 0 20px;font-size:8px;font-weight:900}.analysis-badge{border:1px solid var(--ink);background:#ffffff73;padding:7px 9px;font-size:8px;font-weight:900;display:inline-block}.pattern-analysis-hero h1{letter-spacing:-.08em;overflow-wrap:anywhere;text-wrap:balance;max-width:850px;margin:24px 0;font-size:clamp(48px,6vw,86px);line-height:1.02}.pattern-analysis-hero>div>p{max-width:720px;margin:0;font-size:12px;font-weight:600;line-height:2}.pattern-analysis-hero dl{border-top:1px solid var(--ink);align-self:end;margin:0}.pattern-analysis-hero dl div{border-bottom:1px solid var(--ink);grid-template-columns:90px 1fr;padding:16px 0;display:grid}.pattern-analysis-hero dt{font-size:8px;font-weight:900}.pattern-analysis-hero dd{margin:0;font-size:10px;line-height:1.7}.pattern-analysis-shell{grid-template-columns:230px minmax(0,850px);align-items:start;gap:7vw;padding:80px 7vw 120px;display:grid}.pattern-analysis-summary{border:1px solid var(--ink);background:var(--ink);color:#fff;flex-direction:column;min-height:230px;padding:21px;display:flex;position:sticky;top:100px}.pattern-analysis-summary>span{color:var(--lime);letter-spacing:.14em;font-size:8px;font-weight:900}.pattern-analysis-summary strong{margin-top:30px;font-size:34px}.pattern-analysis-summary p{color:#b1b8b2;margin:7px 0;font-size:10px}.pattern-analysis-summary small{color:var(--lime);align-self:end;margin-top:auto;font-size:11px;font-weight:900}.pattern-analysis-body>section{border-bottom:1px solid var(--line);margin-bottom:62px;padding:0 0 62px}.pattern-analysis-body .section-no{color:#455300;letter-spacing:.15em;margin-bottom:15px;font-size:8px;font-weight:900;display:block}.pattern-analysis-body h2{letter-spacing:-.05em;margin:0 0 27px;font-size:36px}.pattern-analysis-body p,.pattern-analysis-body li{font-size:12px;line-height:2}.analysis-callout{border:1px solid var(--ink);box-shadow:6px 6px 0 var(--ink);background:#fff;gap:12px;margin-top:28px;padding:25px;display:grid}.analysis-callout b{letter-spacing:.1em;font-size:8px}.analysis-callout strong{font-size:18px}.signal-list{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);margin:0;padding:0;list-style:none;display:grid}.signal-list li{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:#fff;min-height:130px;padding:18px}.blueprint-grid{border-top:1px solid var(--line);border-left:1px solid var(--line);grid-template-columns:repeat(2,1fr);margin:0;padding:0;list-style:none;display:grid}.blueprint-grid li{border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff;align-items:center;gap:15px;min-height:55px;padding:12px;font-size:10px;display:flex}.blueprint-grid span{color:#748300;font-size:8px;font-weight:900}.related-patterns{grid-template-columns:repeat(2,1fr);gap:7px;display:grid}.related-patterns a{border:1px solid var(--ink);background:#fff;flex-direction:column;min-height:110px;padding:17px;display:flex}.related-patterns a:hover{background:var(--lime)}.related-patterns span{color:var(--muted);font-size:7px}.related-patterns strong{margin-top:auto;font-size:13px}.pattern-pagination{grid-template-columns:1fr 1fr;gap:8px;display:grid}.pattern-pagination>a{border:1px solid var(--ink);background:var(--ink);color:#fff;flex-direction:column;min-height:120px;padding:18px;display:flex}.pattern-pagination>a:last-child{text-align:right;background:var(--lime);color:var(--ink)}.pattern-pagination span{font-size:8px;font-weight:900}.pattern-pagination strong{margin-top:auto;font-size:13px}.article-page{background:#f8f6ee}.article-header{border-bottom:1px solid var(--ink);justify-content:space-between;align-items:center;min-height:82px;padding:0 5vw;display:flex}.article-header>a:last-child{font-size:9px;font-weight:900}.article-hero{border-bottom:1px solid var(--ink);background:var(--lime);grid-template-columns:1.2fr .8fr;gap:7vw;padding:85px 7vw 75px;display:grid}.breadcrumbs{letter-spacing:.1em;grid-column:1/-1;margin:0;font-size:8px;font-weight:900}.article-hero h1{letter-spacing:-.08em;text-wrap:balance;margin:20px 0 25px;font-size:clamp(50px,6vw,84px);line-height:1.03}.article-hero .article-lead{max-width:730px;margin:0;font-size:13px;font-weight:600;line-height:2}.article-facts{border-top:1px solid var(--ink);align-self:end;margin:0}.article-facts div{border-bottom:1px solid var(--ink);grid-template-columns:80px 1fr;padding:15px 0;display:grid}.article-facts dt{font-size:8px;font-weight:900}.article-facts dd{margin:0;font-size:10px}.article-shell{grid-template-columns:270px minmax(0,830px);align-items:start;gap:7vw;padding:80px 7vw 120px;display:grid}.article-toc{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:22px;position:sticky;top:100px}.article-toc>span{color:var(--lime);letter-spacing:.15em;font-size:8px;font-weight:900}.article-toc ol{margin:20px 0 0;padding:0;list-style:none}.article-toc li{border-top:1px solid #424844}.article-toc a{color:#bdc3be;padding:9px 0;font-size:8px;display:block}.article-body section{border-bottom:1px solid var(--line);margin-bottom:65px;padding:0 0 65px}.article-body section:last-child{border-bottom:0}.article-body .section-no{color:#708000;letter-spacing:.15em;margin-bottom:14px;font-size:8px;font-weight:900;display:block}.article-body h2{letter-spacing:-.05em;margin:0 0 28px;font-size:35px}.article-body h3{margin:30px 0 12px;font-size:19px}.article-body p,.article-body li{font-size:12px;line-height:2}.summary-box{border:1px solid var(--ink);box-shadow:7px 7px 0 var(--ink);background:#fff;padding:28px}.summary-box strong{margin-bottom:12px;font-size:17px;display:block}.summary-box p{margin:0}.formula-panel{background:var(--ink);color:#fff;font:700 17px/1.8 var(--font-geist-mono), monospace;margin:25px 0;padding:26px}.case-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.case-grid article{border:1px solid var(--ink);background:#fff;min-height:180px;padding:19px}.case-grid article:nth-child(2){background:var(--blue)}.case-grid article:nth-child(3){background:var(--orange)}.case-grid span{font-size:8px;font-weight:900}.case-grid h3{margin:25px 0 10px}.case-grid p{margin:0;font-size:9px;line-height:1.8}.steps{counter-reset:step;margin:0;padding:0;list-style:none}.steps li{counter-increment:step;border-top:1px solid var(--line);padding:16px 0 16px 55px;position:relative}.steps li:before{content:"0" counter(step);color:#718100;font-size:10px;font-weight:900;position:absolute;left:0}.mistake-list{gap:7px;display:grid}.mistake-list article{border-left:5px solid var(--orange);background:#fff0e9;padding:20px}.mistake-list h3{margin:0 0 8px}.mistake-list p{margin:0}.resource-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.resource-grid a{border:1px solid var(--ink);background:#fff;flex-direction:column;min-height:130px;padding:20px;display:flex}.resource-grid a span{font-size:8px;font-weight:900}.resource-grid a strong{margin:auto 0 0;font-size:15px}.resource-grid a:last-child{background:var(--lime)}.focus-lesson-grid{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);display:grid}.focus-lesson-grid article{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--green);flex-direction:column;min-height:360px;padding:27px;display:flex}.focus-lesson-grid article:nth-child(2){background:var(--blue)}.focus-lesson-grid article:nth-child(3){background:var(--orange)}.focus-lesson-grid article>span{letter-spacing:.13em;font-size:8px;font-weight:900}.focus-lesson-grid h3{letter-spacing:-.06em;margin:48px 0 16px;font-size:30px}.focus-lesson-grid p{margin:0;font-size:13px;line-height:1.9}.focus-lesson-grid a{border-top:1px solid var(--ink);justify-content:space-between;margin-top:auto;padding-top:16px;font-size:10px;font-weight:900;display:flex}.grade-start-grid{grid-template-columns:repeat(3,1fr);gap:7px;margin-top:28px;display:grid}.grade-start-grid a{border:1px solid var(--ink);background:#fff;grid-template-columns:1fr auto;min-height:120px;padding:18px;display:grid}.grade-start-grid a.green{background:var(--green)}.grade-start-grid a.coral{background:var(--coral)}.grade-start-grid a.cyan{background:var(--cyan)}.grade-start-grid a.orange{background:var(--orange)}.grade-start-grid a.blue{background:var(--blue)}.grade-start-grid a.violet{background:var(--violet)}.grade-start-grid a.pink{background:var(--pink)}.grade-start-grid a.yellow{background:var(--yellow)}.grade-start-grid a.lime{background:var(--lime)}.grade-start-grid span{font-size:25px;font-weight:950}.grade-start-grid strong{grid-column:1/-1;align-self:end;font-size:10px}.grade-start-grid small{grid-area:1/2;font-size:8px;font-weight:900}.course-hub-link{border-top:1px solid var(--ink);margin-top:15px;padding-top:11px;font-size:8px;font-weight:900}.topic-cloud .unit-hub-link{border-color:var(--lime);background:var(--lime);color:var(--ink);font-weight:900}.article-header nav{align-items:center;gap:20px;font-size:9px;font-weight:900;display:flex}.article-header nav a{text-underline-offset:4px;align-items:center;min-height:44px;text-decoration:underline;display:inline-flex}.breadcrumbs{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.breadcrumbs a{text-underline-offset:3px;text-decoration:underline}.article-labels{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.article-labels>span{border:1px solid var(--ink);background:#ffffff7a;padding:7px 9px;font-size:8px;font-weight:900}.article-labels .depth-badge{color:#fff;background:var(--ink)}.lesson-shell{grid-template-columns:240px minmax(0,900px)}.lesson-sidebar{gap:9px;max-height:calc(100dvh - 120px);display:grid;position:sticky;top:100px;overflow-y:auto}.lesson-sidebar .pattern-analysis-summary{min-height:190px;position:static}.lesson-toc{border:1px solid var(--ink);background:#fff;padding:18px}.lesson-toc>span{letter-spacing:.12em;font-size:8px;font-weight:900}.lesson-toc ol{margin:15px 0 0;padding:0;list-style:none}.lesson-toc li{border-top:1px solid var(--line)}.lesson-toc a{padding:9px 0;font-size:8px;font-weight:800;display:block}.lesson-body>section{scroll-margin-top:92px}.signal-strip{flex-wrap:wrap;gap:6px;margin-top:25px;display:flex}.signal-strip span{border:1px solid var(--ink);background:#fff;padding:8px 10px;font-size:8px;font-weight:800}.why-card{border:1px solid var(--ink);background:var(--orange);box-shadow:8px 8px 0 var(--ink);padding:34px}.why-card>span{letter-spacing:.18em;font-size:9px;font-weight:950}.why-card h3{letter-spacing:-.05em;margin:28px 0 17px;font-size:29px;line-height:1.35}.why-card p{margin:0;font-size:13px;line-height:2.05}.key-point-grid{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:1fr 1fr;margin:0;padding:0;list-style:none;display:grid}.key-point-grid li{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:#fff;grid-template-columns:38px 1fr;gap:10px;min-height:170px;padding:20px;display:grid}.key-point-grid li:nth-child(2){background:var(--blue)}.key-point-grid li:nth-child(3){background:#fff4ce}.key-point-grid li:nth-child(4){background:#ffe1d7}.key-point-grid span{font-size:9px;font-weight:900}.key-point-grid p{margin:0}.worked-examples{gap:12px;display:grid}.worked-examples>article{border:1px solid var(--ink);background:#fff;padding:25px}.worked-examples>article>span{color:#5f6d00;letter-spacing:.12em;font-size:8px;font-weight:900}.worked-examples h3{margin:17px 0 12px;font-size:24px}.example-question{border-left:5px solid var(--ink);background:#f1f0e9;padding:18px}.worked-examples details,.practice-list details,.faq-list details{border:1px solid var(--ink);background:var(--white);margin-top:18px}.worked-examples summary,.practice-list summary,.faq-list summary{cursor:pointer;justify-content:space-between;align-items:center;min-height:48px;padding:13px 16px;font-size:10px;font-weight:900;display:flex}.worked-examples summary:after,.practice-list summary:after,.faq-list summary:after{content:"＋";font-size:17px}.worked-examples details[open] summary:after,.practice-list details[open] summary:after,.faq-list details[open] summary:after{content:"−"}.worked-examples details>div,.practice-list details>div{border-top:1px solid var(--line);padding:4px 18px 20px}.worked-examples details p b{color:#455300;letter-spacing:.12em;margin-bottom:5px;font-size:8px;display:block}.example-answer{background:var(--lime);padding:16px}.example-check{background:var(--blue);padding:16px}.practice-list{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.practice-list>article{border:1px solid var(--ink);background:#fff;flex-direction:column;min-height:310px;padding:20px;display:flex}.practice-list>article:nth-child(2){background:var(--blue)}.practice-list>article:nth-child(3){background:#ffe1d7}.practice-list>article>div:first-child{justify-content:space-between;font-size:8px;font-weight:900;display:flex}.practice-list>article>p{margin:32px 0}.practice-list details{margin-top:auto}.practice-list details strong{font-size:13px}.faq-list{gap:8px;display:grid}.faq-list details{background:#fff;margin-top:0}.faq-list summary{font-size:12px}.faq-list p{margin:0;padding:0 18px 20px}.explore-card{border:2px solid var(--ink);background:var(--yellow);box-shadow:7px 7px 0 var(--ink);border-radius:18px;padding:28px}.explore-card>span{font:800 11px/1 var(--mono);letter-spacing:.14em}.explore-card h3{margin:12px 0 8px;font-size:clamp(22px,3vw,34px)}.explore-card p,.explore-card li{line-height:1.8}.explore-card ol{margin:18px 0 0;padding-left:22px}.editorial-note{border:1px solid var(--line);background:#f6f5ef;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 24px;margin-top:34px;padding:22px;display:grid}.editorial-note div{gap:5px;display:grid}.editorial-note span{font:800 10px/1 var(--mono);letter-spacing:.1em;color:var(--muted)}.editorial-note strong{font-size:14px}.editorial-note p{grid-column:1/-1;margin:0;line-height:1.75}.editorial-note a{color:#005ea8;grid-column:1/-1;width:fit-content;font-weight:800}.unit-route-card{border:1px solid var(--ink);background:var(--lime);grid-template-columns:1fr auto;align-items:end;gap:25px;margin-bottom:20px;padding:25px;display:grid}.unit-route-card span{letter-spacing:.12em;font-size:8px;font-weight:900}.unit-route-card h3{margin:18px 0 8px}.unit-route-card p{margin:0}.unit-route-card>a{background:var(--ink);color:#fff;white-space:nowrap;align-items:center;min-height:44px;padding:14px 16px;font-size:9px;font-weight:900;display:inline-flex}.lesson-body .related-patterns a small{color:var(--muted);margin-top:10px;font-size:8px;line-height:1.6}.learning-lab{border:1px solid var(--ink);box-shadow:7px 7px 0 var(--ink);background:#fff;margin-top:28px;padding:24px}.lab-toolbar{grid-template-columns:auto 130px minmax(170px,1fr);align-items:end;gap:10px;display:grid}.lab-toolbar label{gap:7px;font-size:9px;font-weight:900;display:grid}.lab-toolbar select{border:1px solid var(--ink);background:#fff;min-height:44px;padding:8px}.lab-toolbar input[type=range]{accent-color:#005ea8;width:100%}.lab-toggle{display:flex}.lab-toggle button{border:1px solid var(--ink);cursor:pointer;background:#fff;min-height:44px;padding:0 16px;font-size:9px;font-weight:900}.lab-toggle button+button{border-left:0}.lab-toggle button[aria-pressed=true]{background:var(--lime);box-shadow:inset 0 0 0 2px var(--ink)}.lab-result{background:var(--ink);color:#fff;gap:7px;margin:20px 0;padding:20px;display:grid}.lab-result>span{color:var(--lime);font-size:8px;font-weight:900}.lab-result strong{font:800 21px/1.5 var(--font-geist-mono), monospace}.lab-result p{color:#c2c7c3;margin:0}.lab-split{grid-template-columns:.8fr 1.2fr;gap:14px;display:grid}.learning-lab table{border-collapse:collapse;width:100%;font-size:9px}.learning-lab caption{text-align:left;padding:0 0 10px;font-weight:900}.learning-lab th,.learning-lab td{border:1px solid var(--line);text-align:center;padding:10px 7px}.plot-panel{min-width:0}.mini-plot{border:1px solid var(--ink);background:#fff;min-height:260px;position:relative;overflow:hidden}.mini-plot svg{width:100%;min-height:260px;display:block}.plot-axis-svg{stroke:var(--ink);stroke-width:.75px}.plot-curve{fill:none;stroke:#005ea8;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round}.plot-point{fill:var(--orange);stroke:var(--ink);stroke-width:.75px}.mini-plot text{fill:var(--ink);font-size:5px;font-weight:800}.plot-grid-svg{stroke:#e1e3de;stroke-width:.45px}.plot-point.is-selected{fill:var(--lime);stroke-width:1.2px}.plot-caption{color:var(--muted);margin:9px 0 0!important;font-size:10px!important;line-height:1.6!important}.wide-control{grid-column:1/3}.histogram-lab .lab-toolbar{grid-template-columns:1fr 1fr;align-items:center}.histogram-lab .lab-toolbar p{margin:0}.histogram-axis-title,.histogram-axis-note{justify-content:space-between;gap:15px;display:flex;margin:22px 0 8px!important;font-size:10px!important;line-height:1.6!important}.histogram-axis-title span{color:var(--muted)}.histogram-visual{grid-template-columns:32px minmax(0,1fr);display:grid}.histogram-scale{height:300px;color:var(--muted);text-align:right;flex-direction:column;justify-content:space-between;margin:0;padding:25px 7px 34px 0;font-size:9px;font-weight:900;display:flex}.histogram-chart{border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);background:repeating-linear-gradient(#e1e3de 0 1px,#0000 1px 33.3333%),#f6f5ef;align-items:end;height:300px;margin:0;padding:25px 10px 34px;display:flex}.histogram-column{flex-direction:column;flex:1;justify-content:end;height:100%;display:flex;position:relative}.histogram-column>span{border:1px solid var(--ink);background:var(--cyan);min-height:0;display:block;position:relative}.histogram-column>span.empty{border:0}.histogram-column>span b{font-size:9px;position:absolute;top:-21px;left:50%;transform:translate(-50%)}.histogram-column small{white-space:nowrap;font-size:8px;position:absolute;top:calc(100% + 8px);left:50%;transform:translate(-50%)}.construction-stage{aspect-ratio:4/3;border:1px solid var(--ink);background:#f7f6ef;width:min(100%,640px);height:auto;margin-inline:auto;overflow:hidden}.construction-svg{width:100%;height:100%;display:block}.construction-svg text{fill:var(--ink);font:900 5px/1 Arial,sans-serif}.construction-base,.construction-bisector{stroke:var(--ink);stroke-width:1.2px}.construction-endpoint{fill:var(--ink)}.construction-arc{fill:none;stroke-width:1.15px;stroke-dasharray:2.5 1.8}.construction-arc.arc-a{stroke:#b83b00}.construction-arc.arc-b{stroke:#005ea8}.construction-intersection{fill:var(--lime);stroke:var(--ink);stroke-width:.8px}.right-angle-mark{fill:none;stroke:var(--ink);stroke-width:1px}.construction-controls{grid-template-columns:auto 1fr;align-items:center;gap:17px;margin-top:18px;display:grid}.construction-controls>div{display:flex}.construction-controls button{border:1px solid var(--ink);cursor:pointer;background:#fff;width:44px;height:44px;font-weight:900}.construction-controls button+button{border-left:0}.construction-controls button[aria-pressed=true]{background:var(--lime);box-shadow:inset 0 0 0 2px var(--ink)}.construction-controls p{margin:0}.construction-controls p b{letter-spacing:.12em;margin-bottom:5px;font-size:8px;display:block}.geometry-toolbar{grid-template-columns:170px minmax(0,1fr)}.cone-lab .geometry-toolbar{grid-template-columns:1fr 1fr}.geometry-toolbar p{align-self:center;margin:0}.geometry-figure-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.geometry-figure{border:1px solid var(--ink);background:#f7f6ef;min-width:0;margin:0;padding:14px}.sector-figure{max-width:600px;margin-inline:auto}.geometry-svg{width:100%;height:auto;display:block}.geometry-svg text{fill:var(--ink);font:800 5px/1 Arial,sans-serif}.geometry-sector{fill:var(--cyan);fill-opacity:.82;stroke:var(--ink);stroke-width:1.1px}.geometry-point{fill:var(--ink)}.geometry-figure figcaption{color:var(--muted);margin-top:10px;font-size:11px;line-height:1.7}.cone-side{fill:var(--cyan);fill-opacity:.55;stroke:var(--ink);stroke-width:1.1px}.cone-base{fill:var(--blue);stroke:var(--ink);stroke-width:1.1px}.cone-height{stroke:#005ea8;stroke-width:.9px;stroke-dasharray:2 2}.cone-radius{stroke:var(--ink);stroke-width:.9px}.net-base-circle{fill:var(--blue);stroke:var(--ink);stroke-width:1.1px}.course-hub-page,.unit-hub-page{background:#f8f6ee;min-height:100vh}.course-hub-hero,.unit-hub-hero{border-bottom:1px solid var(--ink);background:var(--lime);padding:75px 7vw}.course-hub-hero.green,.unit-hub-hero.green{background:var(--green)}.course-hub-hero.coral,.unit-hub-hero.coral{background:var(--coral)}.course-hub-hero.cyan,.unit-hub-hero.cyan{background:var(--cyan)}.course-hub-hero.orange,.unit-hub-hero.orange{background:var(--orange)}.course-hub-hero.blue,.unit-hub-hero.blue{background:var(--blue)}.course-hub-hero.violet,.unit-hub-hero.violet{background:var(--violet)}.course-hub-hero.pink,.unit-hub-hero.pink{background:var(--pink)}.course-hub-hero.yellow,.unit-hub-hero.yellow{background:var(--yellow)}.course-hub-hero .eyebrow{margin:45px 0 22px}.course-hub-hero h1{letter-spacing:-.08em;max-width:950px;margin:0;font-size:clamp(50px,7vw,94px);line-height:1}.course-hub-hero>p:not(.eyebrow){max-width:750px;margin:30px 0;font-size:13px;line-height:2}.course-hub-hero dl{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);margin:55px 0 0;display:grid}.course-hub-hero dl div{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);flex-direction:column;min-height:105px;padding:17px;display:flex}.course-hub-hero dt{font-size:8px;font-weight:900}.course-hub-hero dd{margin:auto 0 0;font-size:27px;font-weight:950}.course-note,.unit-why-strip{border-bottom:1px solid var(--ink);background:var(--ink);color:#fff;grid-template-columns:180px 1fr;gap:40px;padding:28px 7vw;display:grid}.course-note span,.unit-why-strip span{color:var(--lime);letter-spacing:.15em;font-size:8px;font-weight:900}.course-note p,.unit-why-strip p{max-width:980px;margin:0;font-size:11px;line-height:1.9}.unit-featured-detail{border-bottom:1px solid var(--ink);background:var(--cyan);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:7vw;padding:46px 7vw;display:grid}.unit-featured-detail span{letter-spacing:.15em;font-size:8px;font-weight:900}.unit-featured-detail h2{letter-spacing:-.055em;max-width:840px;margin:14px 0 10px;font-size:clamp(28px,3.2vw,48px);line-height:1.1}.unit-featured-detail p{max-width:800px;margin:0;font-size:11px;line-height:1.9}.unit-featured-detail>a{border:1px solid var(--ink);background:var(--ink);color:#fff;justify-content:space-between;align-items:center;min-width:230px;min-height:62px;padding:0 18px;font-size:10px;font-weight:900;display:flex}.course-unit-section,.unit-learning-map{padding:95px 7vw 120px}.hub-heading{grid-template-columns:1fr 1fr;align-items:end;gap:8vw;margin-bottom:55px;display:grid}.hub-heading span{letter-spacing:.16em;font-size:8px;font-weight:900}.hub-heading h2{letter-spacing:-.07em;margin:20px 0 0;font-size:clamp(42px,5vw,70px)}.hub-heading>p{color:var(--muted);margin:0;font-size:11px;line-height:2}.course-unit-grid{grid-template-columns:repeat(2,1fr);gap:9px;display:grid}.course-unit-grid>article{border:1px solid var(--ink);background:#fff;flex-direction:column;min-height:420px;padding:25px;display:flex}.unit-card-top{justify-content:space-between;font-size:8px;font-weight:900;display:flex}.course-unit-grid h2{margin:40px 0 12px;font-size:29px}.course-unit-grid p{color:var(--muted);margin:0;font-size:10px;line-height:1.9}.topic-preview{flex-wrap:wrap;gap:5px;margin:25px 0;display:flex}.topic-preview a{border:1px solid var(--line);padding:7px 8px;font-size:8px}.unit-card-cta{border-top:1px solid var(--ink);justify-content:space-between;margin-top:auto;padding-top:15px;font-size:10px;font-weight:900;display:flex}.hub-method{border-top:1px solid var(--ink);background:var(--lime);grid-template-columns:.8fr 1.2fr;gap:7vw;padding:90px 7vw 110px;display:grid}.hub-method>div>span{font-size:8px;font-weight:900}.hub-method h2{letter-spacing:-.07em;margin:25px 0;font-size:52px}.hub-method ol{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:1fr 1fr;margin:0;padding:0;list-style:none;display:grid}.hub-method li{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);flex-direction:column;min-height:190px;padding:18px;display:flex}.hub-method li span{font-size:8px;font-weight:900}.hub-method li b{margin-top:30px;font-size:20px}.hub-method li p{margin:auto 0 0;font-size:9px;line-height:1.8}.unit-hub-hero{grid-template-columns:1.15fr .85fr;gap:7vw;display:grid}.unit-hub-hero .breadcrumbs{grid-column:1/-1}.unit-hub-hero h1{letter-spacing:-.08em;margin:25px 0;font-size:clamp(55px,7vw,95px)}.unit-hub-hero>div>p{max-width:750px;font-size:13px;line-height:2}.unit-hub-hero aside{border:1px solid var(--ink);background:#ffffff80;align-self:end;padding:25px}.unit-hub-hero aside>span{font-size:8px;font-weight:900}.unit-hub-hero aside strong{margin:25px 0 10px;font-size:39px;display:block}.unit-hub-hero aside p{font-size:10px;line-height:1.8}.unit-hub-hero aside a{background:var(--ink);color:#fff;margin-top:25px;padding:14px;font-size:9px;font-weight:900;display:block}.learning-stage{margin-top:75px}.learning-stage>header{border-bottom:1px solid var(--ink);grid-template-columns:1fr auto;align-items:end;margin-bottom:20px;display:grid}.learning-stage>header span{letter-spacing:.14em;grid-column:1/-1;margin-bottom:15px;font-size:8px;font-weight:900}.learning-stage>header h2{margin:0 0 15px;font-size:32px}.learning-stage>header b{margin-bottom:18px;font-size:8px}.lesson-link-grid{grid-template-columns:repeat(3,1fr);gap:7px;display:grid}.lesson-link-grid>article{border:1px solid var(--line);background:#fff;flex-direction:column;min-height:390px;padding:20px;display:flex}.lesson-link-grid>article:hover{border-color:var(--ink);box-shadow:5px 5px 0 var(--ink)}.lesson-link-grid>article>div{justify-content:space-between;font-size:8px;font-weight:900;display:flex}.lesson-link-grid>article>div b{background:var(--lime);padding:5px 7px}.lesson-link-grid h3{margin:33px 0 10px;font-size:19px}.lesson-link-grid>article>p{color:var(--muted);font-size:9px;line-height:1.8}.lesson-link-grid dl{margin:18px 0}.lesson-link-grid dl div{border-top:1px solid var(--line);grid-template-columns:35px 1fr;padding:8px 0;display:grid}.lesson-link-grid dt{font-size:8px;font-weight:900}.lesson-link-grid dd{color:var(--muted);margin:0;font-size:9px;line-height:1.6}.lesson-link-grid article>a{border-top:1px solid var(--ink);justify-content:space-between;margin-top:auto;padding-top:14px;font-size:9px;font-weight:900;display:flex}.unit-pagination{grid-template-columns:1fr 1fr;gap:8px;padding:0 7vw 110px;display:grid}.unit-pagination a{border:1px solid var(--ink);background:var(--ink);color:#fff;flex-direction:column;min-height:140px;padding:22px;display:flex}.unit-pagination a:last-child{text-align:right;background:var(--lime);color:var(--ink)}.unit-pagination span{font-size:8px;font-weight:900}.unit-pagination strong{margin-top:auto;font-size:18px}@media (max-width:1080px){.site-header nav>a:not(.header-cta):not(.mobile-search-link){display:none}.site-header nav>a.mobile-search-link{justify-content:center;align-items:center;min-width:44px;min-height:44px;padding:0 6px;display:inline-flex}.hero{grid-template-columns:1fr}.hero-board{min-height:640px}.metric-strip{grid-template-columns:1fr 1fr}.metric-strip>div:nth-child(2){border-right:0}.metric-strip>div:nth-child(-n+2){border-bottom:1px solid var(--ink)}.analysis-axes,.type-grid,.pattern-grid,.dictionary-toolbar{grid-template-columns:1fr 1fr}.finder-search{grid-column:1/-1}.reset-button{min-height:48px}.roadmap-grid{grid-template-columns:1fr 1fr}.lesson-link-grid{grid-template-columns:repeat(2,1fr)}.lesson-shell{grid-template-columns:210px minmax(0,1fr);gap:4vw}.course-hub-hero h1{font-size:66px}}@media (max-width:900px){html{scroll-padding-top:66px}.section{padding:75px 5vw 85px}.site-header{height:66px}.brand,.header-cta{min-height:44px}.brand b{display:none}.header-cta{align-items:center;padding:11px 13px;display:inline-flex}.hero-copy{padding:60px 5vw}.hero h1{font-size:clamp(45px,13vw,53px)}.lead{font-size:14px}.hero-links{flex-direction:column}.hero-board{padding:45px 6vw}.board-row{grid-template-columns:35px 80px 1fr}.section-heading{grid-template-columns:1fr;gap:25px}.section-heading h2,.standard-copy h2{font-size:47px}.type-section .section-heading h2{font-size:43px}.focus-lesson-grid{grid-template-columns:1fr}.grade-start-grid{grid-template-columns:1fr 1fr}.gap-layout{grid-template-columns:1fr}.gap-list button{grid-template-columns:35px 1fr 60px 20px}.gap-list button strong{font-size:13px}.gap-detail{min-height:430px}.course-block{grid-template-columns:1fr}.course-marker{grid-template-columns:1fr auto;align-items:center;min-height:150px;display:grid;position:static}.course-marker small{grid-column:1}.course-marker strong{grid-area:1/2/3}.course-hub-link{grid-column:1/-1}.course-units summary{grid-template-columns:32px 1fr 24px;padding:18px}.course-units summary small{display:none}.topic-cloud{padding:0 18px 25px}.pattern-grid,.cross-grid,.type-grid{grid-template-columns:1fr}.pattern-card{min-height:auto}.analysis-axes{grid-template-columns:1fr}.article-standard{grid-template-columns:1fr;gap:60px}.standard-copy{position:static}.composite-panel,.composite-panel ol{grid-template-columns:1fr}.composite-panel li{border-left:0}.composite-panel li:nth-last-child(2){border-bottom:1px solid #515752}.scale-caption{grid-template-columns:1fr}.scale-caption p{grid-column:1}.scale-table{grid-template-columns:1fr 1fr}.scale-table .total{grid-column:1/-1}.sources-section{grid-template-columns:1fr}.source-links{grid-column:1}.final-cta{padding:75px 5vw}.final-cta h2{font-size:48px}.final-cta>div{flex-direction:column;align-items:stretch}footer{flex-wrap:wrap}footer p{order:3;width:100%}.article-hero{grid-template-columns:1fr;padding:60px 5vw}.breadcrumbs{grid-column:1}.article-hero h1{font-size:clamp(39px,10.5vw,49px)}.article-shell{grid-template-columns:1fr;padding:55px 5vw 85px}.article-toc{position:static}.case-grid,.resource-grid{grid-template-columns:1fr}.pattern-analysis-hero{grid-template-columns:1fr;padding:52px 5vw}.pattern-analysis-hero .breadcrumbs{grid-column:1}.pattern-analysis-shell{grid-template-columns:1fr;padding:55px 5vw 85px}.pattern-analysis-summary{position:static}.signal-list,.related-patterns{grid-template-columns:1fr}.article-header nav{gap:10px}.article-header nav .header-secondary-link{display:none}.lesson-sidebar{max-height:none;position:static;overflow:visible}.key-point-grid,.practice-list,.lab-split,.unit-route-card{grid-template-columns:1fr}.unit-route-card>a{white-space:normal}.lab-toolbar,.histogram-lab .lab-toolbar{grid-template-columns:1fr}.wide-control{grid-column:1}.construction-controls,.geometry-figure-grid{grid-template-columns:1fr}.course-hub-hero,.unit-hub-hero{grid-template-columns:1fr;padding:55px 5vw}.unit-hub-hero .breadcrumbs{grid-column:1}.course-hub-hero h1{font-size:52px}.course-hub-hero dl{grid-template-columns:1fr}.course-note,.unit-why-strip{grid-template-columns:1fr;gap:12px;padding:24px 5vw}.unit-featured-detail{grid-template-columns:1fr;gap:24px;padding:38px 5vw}.unit-featured-detail>a{min-width:0}.course-unit-section,.unit-learning-map{padding:70px 5vw 85px}.hub-heading,.hub-method,.course-unit-grid,.lesson-link-grid{grid-template-columns:1fr}.hub-method{padding:70px 5vw}.unit-pagination{padding:0 5vw 80px}.course-unit-grid>article,.lesson-link-grid>article{min-height:0}.focus-lesson-grid article{min-height:280px}.roadmap-grid article{min-height:220px}.type-grid button{min-height:190px}.eyebrow,.breadcrumbs,.section-heading>div>p,.standard-copy>p:first-child,.sources-section>div>p,.metric-strip span,.metric-strip small,.board-note span,.analysis-axes span,.type-grid button>span,.type-grid small,.composite-panel>div span,.composite-panel li span,.finder-field>span,.pattern-meta span,.roadmap-grid article>span,.roadmap-grid small,.source-links a,footer p,footer>span,.grade-start-grid small,.course-hub-link,.article-labels>span,.article-facts dt,.article-toc>span,.article-toc a,.article-body .section-no,.pattern-analysis-body .section-no,.course-hub-hero dt,.course-note span,.unit-why-strip span,.hub-heading span,.unit-card-top,.hub-method>div>span,.hub-method li span,.unit-hub-hero aside>span,.learning-stage>header span,.learning-stage>header b,.lesson-link-grid>article>div,.lesson-link-grid dt,.unit-route-card span,.lesson-toc>span,.lesson-toc a,.lab-result>span,.construction-controls p b{font-size:10px}.analysis-axes p,.type-grid p,.composite-panel>div p,.composite-panel li,.cross-grid p,.cross-grid small,.course-unit-grid p,.lesson-link-grid>article>p,.lesson-link-grid dd,.hub-method li p,.course-note p,.unit-why-strip p{font-size:11px}.topic-preview a{align-items:center;min-height:40px;font-size:10px;display:inline-flex}.article-facts dd,.lab-toolbar label,.lab-toggle button,.learning-lab table,.result-line,.course-tabs button{font-size:10px}.article-hero .article-lead,.article-body p,.article-body li,.pattern-analysis-hero>div>p,.pattern-analysis-body p,.pattern-analysis-body li{font-size:16px;line-height:1.85}.pattern-analysis-body>section,.article-body section{margin-bottom:42px;padding-bottom:42px}.hero-search input,.finder-search input,.finder-field select,.lab-toolbar select{min-height:44px;font-size:16px}.hero-search input,.finder-search input{height:100%}.lesson-toc a,.unit-card-cta,.lesson-link-grid article>a,.focus-lesson-grid a,.course-tabs button{align-items:center;min-height:44px;display:flex}.unit-card-cta,.lesson-link-grid article>a,.focus-lesson-grid a{justify-content:space-between}.histogram-column small{font-size:8px}.geometry-figure figcaption{font-size:12px}}@media (max-width:480px){.metric-strip{grid-template-columns:1fr}.metric-strip>div{border-right:0;border-bottom:1px solid var(--ink)}.dictionary-toolbar{grid-template-columns:1fr}.finder-search{grid-column:1}.dictionary-toolbar select,.reset-button{min-height:48px}.hero h1{font-size:clamp(40px,12vw,47px);line-height:.98}.section-heading h2,.standard-copy h2{font-size:40px}.course-hub-hero h1,.unit-hub-hero h1{font-size:46px}.result-line{flex-direction:column;align-items:flex-start;gap:12px}.keyboard-hint{display:none}.roadmap-grid,.scale-table{grid-template-columns:1fr}.scale-table .total{grid-column:1}.blueprint-grid,.pattern-pagination,.grade-start-grid,.hub-method ol,.unit-pagination{grid-template-columns:1fr}.pattern-analysis-hero h1{font-size:43px}.lesson-body h2{font-size:31px}.why-card{padding:24px}.why-card h3{font-size:24px}.learning-lab{padding:15px}.lab-result strong{font-size:16px}.learning-lab table,.lab-toolbar label,.lab-toggle button{font-size:11px}.histogram-chart,.histogram-scale{height:250px}.histogram-column>span b{font-size:11px}.histogram-column small{font-size:9px}.construction-stage{height:auto}.article-header{padding:0 4vw}.article-header nav a:not(.header-search-link){display:none}.article-header nav .header-search-link{align-items:center;min-height:44px;display:inline-flex}}@media (max-width:360px){.hero-search kbd{display:none}.hero-search span{padding:0 10px}.hero-search button{padding:0 12px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.pattern-card:hover{transform:none}}.qf-page{--qf-ink:#17312d;--qf-green:#0f6b57;--qf-mint:#dff5e7;--qf-cream:#fbf7ec;color:var(--qf-ink);background:var(--qf-cream);min-height:100vh}.qf-header{background:#fbf7ecf0;border-bottom:1px solid #17312d29;justify-content:space-between;align-items:center;min-height:72px;padding:14px clamp(20px,5vw,72px);display:flex}.qf-header nav{gap:20px;font-size:.88rem;font-weight:700;display:flex}.qf-hero .breadcrumbs{margin-bottom:48px}.qf-kicker,.qf-section-heading>span{letter-spacing:.14em;color:var(--qf-green);font-size:.78rem;font-weight:850}.qf-hero h1{letter-spacing:-.055em;margin:14px 0 22px;font-size:clamp(2.7rem,6.4vw,6.5rem);line-height:.94}.qf-lead{max-width:660px;font-size:clamp(1rem,1.5vw,1.2rem);line-height:1.9}.qf-hero-actions a{background:var(--qf-ink);color:#fff;border-radius:999px;padding:13px 20px;font-weight:800}.qf-hero-actions a+a{color:var(--qf-ink);background:0 0;border:1px solid}.qf-formula-stage>span{color:#56706b;text-align:center;font-weight:700;display:block}.qf-formula-stage>strong{white-space:nowrap;justify-content:center;align-items:center;gap:12px;margin:34px 0;font-size:clamp(1.9rem,4vw,3.6rem);display:flex}.qf-frac{text-align:center;flex-direction:column;line-height:1.2;display:inline-flex}.qf-frac i{padding:.14em .2em;font-style:normal}.qf-frac i:first-child{border-bottom:3px solid var(--qf-ink)}.qf-formula-stage p{background:var(--qf-mint);border-radius:16px;margin:0;padding:14px 18px;line-height:1.7}.qf-first,.qf-preview-proofs{padding:86px clamp(20px,5vw,72px)}.qf-first{background:#fff}.qf-section-heading h2{letter-spacing:-.04em;margin:9px 0 12px;font-size:clamp(2rem,4vw,3.8rem)}.qf-section-heading p{color:#56706b;line-height:1.8}.qf-step-row{grid-template-columns:repeat(4,1fr);gap:14px;max-width:1100px;margin:auto;padding:0;list-style:none;display:grid}.qf-step-row li{background:var(--qf-cream);border:1px solid #17312d1a;border-radius:22px;padding:22px}.qf-step-row li b{background:var(--qf-green);color:#fff;border-radius:50%;place-items:center;width:32px;height:32px;display:grid}.qf-step-row li span{margin:25px 0 8px;font-size:1.6rem;font-weight:900;display:block}.qf-step-row li p{color:#667b77;margin:0}.qf-preview-proofs{background:var(--qf-mint)}.qf-proof-preview-grid{grid-template-columns:repeat(3,1fr);gap:18px;max-width:1100px;margin:auto;display:grid}.qf-proof-preview-grid article{background:#fff;border-radius:24px;padding:28px}.qf-proof-preview-grid article span{color:var(--qf-green);letter-spacing:.08em;font-size:.78rem;font-weight:850}.qf-proof-preview-grid h3{margin:16px 0 8px;font-size:1.35rem}.qf-proof-preview-grid p{color:#56706b;margin:0;line-height:1.75}@media (max-width:780px){.qf-header nav a:first-child{display:none}.qf-hero-grid{grid-template-columns:1fr}.qf-formula-stage{transform:none}.qf-step-row,.qf-proof-preview-grid{grid-template-columns:1fr}}.youten-page{background:#f7f4ea;min-height:100vh}.youten-header{z-index:40;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f7f4eaf5;position:sticky;top:0}.youten-hero{border-bottom:1px solid var(--ink);grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);min-height:720px;display:grid}.youten-hero .breadcrumbs{grid-column:1/-1;align-self:start;margin:0;padding:24px 6vw 0}.youten-hero-copy{flex-direction:column;justify-content:center;padding:55px 6vw 80px;display:flex}.youten-hero-copy .eyebrow{margin-bottom:32px}.youten-hero-copy h1{letter-spacing:-.095em;max-width:890px;margin:0;font-size:clamp(64px,7.1vw,112px);line-height:.92}.youten-hero-copy h1 em{color:#a63300;font-style:normal}.youten-hero-copy>p:last-of-type{max-width:760px;margin:38px 0 0;font-size:15px;line-height:2}.youten-hero-search>label{margin-bottom:8px;font-size:9px;font-weight:900;display:block}.youten-hero-search>div{border:1px solid var(--ink);min-height:60px;box-shadow:6px 6px 0 var(--ink);background:#fff;align-items:center;display:flex}.youten-hero-search b{padding:0 15px;font:34px/1 Georgia,serif;transform:rotate(-16deg)}.youten-hero-search input{background:0 0;border:0;flex:1;align-self:stretch;min-width:0;padding:0;font-size:13px}.youten-hero-search button{border:0;border-left:1px solid var(--ink);background:var(--lime);cursor:pointer;align-self:stretch;padding:0 17px;font-size:9px;font-weight:900}.youten-hero-actions{grid-template-columns:1fr 1fr;gap:8px;max-width:760px;margin-top:36px;display:grid}.youten-hero-actions a{border:1px solid var(--ink);background:var(--lime);justify-content:space-between;align-items:center;min-height:58px;padding:0 18px;font-size:10px;font-weight:900;display:flex}.youten-hero-actions a:last-child{background:var(--ink);color:#fff}.youten-hero-board{background:var(--ink);color:#fff;flex-direction:column;padding:48px 3.5vw;display:flex}.youten-hero-board>span{color:var(--lime);letter-spacing:.16em;font-size:8px;font-weight:900}.youten-hero-board ol{border-top:1px solid #505651;margin:55px 0 0;padding:0;list-style:none}.youten-hero-board li{border-bottom:1px solid #505651;grid-template-columns:45px 1fr;align-items:center;min-height:118px;display:grid}.youten-hero-board li strong{margin-bottom:9px;font-size:22px;display:block}.youten-hero-board li small{color:#b8beb9;font-size:10px}.youten-hero-board>p{background:var(--orange);color:var(--ink);margin:auto 0 0;padding:22px;font-size:11px;font-weight:800;line-height:1.8}.youten-metrics{border-bottom:1px solid var(--ink);background:#fff;grid-template-columns:repeat(4,1fr);display:grid}.youten-metrics>div{border-right:1px solid var(--ink);grid-template-columns:1fr auto;align-items:end;min-height:154px;padding:24px 2.7vw;display:grid}.youten-metrics>div:last-child{background:var(--lime);border-right:0}.youten-metrics span{color:var(--muted);letter-spacing:.16em;grid-column:1/-1;align-self:start;font-size:8px;font-weight:900}.youten-metrics strong{letter-spacing:-.07em;font-size:48px;line-height:.9}.youten-metrics small{max-width:100px;color:var(--muted);text-align:right;font-size:9px;line-height:1.5}.youten-course-rail{border-bottom:1px solid var(--ink);background:#fff;grid-template-columns:210px 1fr;align-items:stretch;gap:24px;padding:18px 6vw;display:grid}.youten-course-rail>p{flex-direction:column;justify-content:center;margin:0;display:flex}.youten-course-rail>p span{color:var(--muted);letter-spacing:.15em;font-size:8px;font-weight:900}.youten-course-rail>div{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(9,minmax(0,1fr));display:grid}.youten-course-rail a{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:#f7f4ea;flex-direction:column;justify-content:space-between;min-height:74px;padding:11px;display:flex}.youten-course-rail a:hover{box-shadow:0 3px 0 var(--ink);transform:translateY(-3px)}.youten-course-rail a span{font-size:13px;font-weight:950}.youten-course-rail a small{color:var(--muted);font-size:8px;font-weight:800}.youten-routes{border-bottom:1px solid var(--ink);background:#ebe9df;padding:105px 6vw 120px;scroll-margin-top:74px}.youten-route-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.youten-route-card{--route-color:var(--lime);border:1px solid var(--ink);background:#fff;flex-direction:column;min-width:0;min-height:560px;padding:24px;display:flex}.youten-route-card.green{--route-color:var(--green)}.youten-route-card.coral{--route-color:var(--coral)}.youten-route-card.cyan{--route-color:var(--cyan)}.youten-route-card.orange{--route-color:var(--orange)}.youten-route-card>header{justify-content:space-between;align-items:center;gap:12px;font-size:8px;font-weight:900;display:flex}.youten-route-card>header b{background:var(--route-color);padding:7px 9px}.youten-route-card h3{letter-spacing:-.065em;margin:46px 0 12px;font-size:clamp(31px,3vw,48px);line-height:1.05}.youten-route-card>p{max-width:570px;color:var(--muted);margin:0;font-size:11px;line-height:1.9}.youten-route-card ol{margin:auto 0 0;padding:28px 0 0;list-style:none}.youten-route-card li{border-top:1px solid var(--ink)}.youten-route-card li:last-child{border-bottom:1px solid var(--ink)}.youten-route-card li a{grid-template-columns:62px 1fr auto;align-items:center;gap:12px;min-height:64px;padding:9px 12px;display:grid}.youten-route-card li a:hover{background:var(--route-color)}.youten-route-card li small{color:var(--muted);font-size:8px;font-weight:900}.youten-route-card li strong{font-size:11px}.youten-promo{border-bottom:1px solid var(--ink);background:var(--cyan);grid-template-columns:1fr 1fr;gap:7vw;padding:72px 6vw;display:grid}.youten-promo>div:first-child>span{letter-spacing:.16em;font-size:8px;font-weight:900}.youten-promo h2{letter-spacing:-.075em;margin:24px 0 0;font-size:clamp(42px,4.5vw,66px);line-height:1.04}.youten-promo-copy>p{max-width:650px;margin:0;font-size:13px;line-height:1.95}.youten-promo-copy dl{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);margin:30px 0 0;display:grid}.youten-promo-copy dl div{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);flex-direction:column;min-height:82px;padding:12px;display:flex}.youten-promo-copy dt{font-size:8px;font-weight:900}.youten-promo-copy dd{margin:auto 0 0;font-size:22px;font-weight:950}.youten-promo>a{border:1px solid var(--ink);background:var(--ink);color:#fff;grid-column:1/-1;justify-content:space-between;align-items:center;min-height:58px;padding:0 19px;font-size:10px;font-weight:900;display:flex}.curriculum-watch{border-bottom:1px solid var(--ink);background:var(--cyan);padding:100px 6vw 115px}.curriculum-watch-grid{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(5,minmax(0,1fr));display:grid}.curriculum-watch-grid>a{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:#ffffff42;flex-direction:column;min-height:300px;padding:19px;display:flex}.curriculum-watch-grid span{font-size:8px;font-weight:900}.curriculum-watch-grid h3{letter-spacing:-.04em;margin:42px 0 13px;font-size:22px}.curriculum-watch-grid p{margin:0;font-size:10px;line-height:1.85}.curriculum-watch-grid b{border-top:1px solid var(--ink);margin-top:auto;padding-top:14px;font-size:9px}.curriculum-source{margin:24px 0 0;font-size:10px;line-height:1.8}.curriculum-source a{text-underline-offset:4px;font-weight:900;text-decoration:underline}.formula-desk{border-bottom:1px solid var(--ink);background:#fffdf7;padding:110px 6vw 125px}.youten-section-heading{grid-template-columns:1fr 1fr;align-items:end;gap:9vw;margin-bottom:58px;display:grid}.youten-section-heading>div>span{letter-spacing:.18em;font-size:8px;font-weight:900}.youten-section-heading h2{letter-spacing:-.08em;margin:22px 0 0;font-size:clamp(48px,5vw,76px);line-height:1.02}.youten-section-heading>p{max-width:650px;color:var(--muted);margin:0;font-size:14px;line-height:2}.formula-grid{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.formula-card{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:#fff;flex-direction:column;min-height:335px;padding:20px;display:flex}.formula-card:hover{background:var(--lime)}.formula-card>div{justify-content:space-between;font-size:8px;font-weight:900;display:flex}.formula-card>div b{background:var(--lime);padding:5px 8px}.formula-card.green>div b{background:var(--green)}.formula-card.coral>div b{background:var(--coral)}.formula-card.cyan>div b{background:var(--cyan)}.formula-card.orange>div b{background:var(--orange)}.formula-card.blue>div b{background:var(--blue)}.formula-card.violet>div b{background:var(--violet)}.formula-card.pink>div b{background:var(--pink)}.formula-card.yellow>div b{background:var(--yellow)}.formula-card>p{color:var(--muted);margin:30px 0 8px;font-size:10px;font-weight:900}.formula-card>strong{overflow-wrap:anywhere;font-family:Georgia,Times New Roman,serif;font-size:20px;line-height:1.55}.formula-card>dl{margin:18px 0 16px}.formula-card>dl div{border-top:1px solid #d2d4cd;grid-template-columns:40px 1fr;gap:8px;padding:7px 0;display:grid}.formula-card>dl dt{font-size:8px;font-weight:900}.formula-card>dl dd{color:var(--muted);margin:0;font-size:9px;line-height:1.6}.formula-card>i{border-top:1px solid var(--ink);margin-top:auto;padding-top:14px;font-size:9px;font-style:normal;font-weight:900}.youten-guide{background:var(--ink);color:#fff;padding:110px 5vw 130px}.youten-finder{background:#141715;border:1px solid #565d57;margin:0 0 55px;padding:16px}.youten-search>span{color:#c3c8c4;letter-spacing:.08em;margin-bottom:8px;font-size:8px;font-weight:900;display:block}.youten-search>div{min-height:58px;color:var(--ink);box-shadow:6px 6px 0 var(--lime);background:#fff;border:1px solid #fff;align-items:center;display:flex}.youten-search b{padding:0 16px;font:34px/1 Georgia,serif;transform:rotate(-16deg)}.youten-search input{background:0 0;border:0;flex:1;align-self:stretch;min-width:0;padding:0;font-size:14px}.youten-search input::-webkit-search-cancel-button{cursor:pointer;width:22px;height:22px}.youten-search kbd{margin-left:10px}.youten-query-clear{width:44px;height:44px;color:var(--ink);cursor:pointer;background:#e7e7df;border:0;border-radius:50%;flex:0 0 44px;margin-right:4px;font-size:21px;line-height:1}:is(.youten-query-clear:hover,.youten-query-clear:focus-visible){background:var(--orange)}.youten-quick-search{flex-wrap:wrap;align-items:center;gap:6px;margin-top:16px;display:flex}.youten-quick-search>span{color:#b9beb9;letter-spacing:.1em;flex:none;margin-right:5px;font-size:8px;font-weight:900}.youten-quick-search button{color:#fff;cursor:pointer;background:#272b28;border:1px solid #656c66;border-radius:999px;min-height:44px;padding:0 13px;font-size:9px;font-weight:900}.youten-filter-tabs{scroll-snap-type:x proximity;scrollbar-color:var(--lime) #303530;scrollbar-width:thin;gap:6px;margin-top:16px;padding:0 18px 4px 0;display:flex;overflow-x:auto}.youten-filter-tabs button{color:#fff;cursor:pointer;scroll-snap-align:start;background:0 0;border:1px solid #5b625c;flex:none;min-width:76px;min-height:44px;padding:8px 12px;font-size:9px;font-weight:900}.youten-filter-tabs button span{color:#969d97;margin-left:8px}.youten-filter-tabs button[aria-pressed=true] span{color:var(--ink)}.youten-domain-tabs{scroll-snap-type:x proximity;scrollbar-width:thin;scrollbar-color:var(--cyan) #303530;align-items:center;gap:6px;margin-top:10px;padding-right:18px;display:flex;overflow-x:auto}.youten-domain-tabs>span{color:#b9beb9;letter-spacing:.12em;flex:none;margin-right:5px;font-size:8px;font-weight:900}.youten-domain-tabs button{color:#fff;cursor:pointer;scroll-snap-align:start;background:0 0;border:1px solid #5b625c;border-radius:999px;flex:none;min-height:44px;padding:0 12px;font-size:9px;font-weight:900}.youten-result-line{color:#b6bcb7;justify-content:space-between;align-items:end;min-height:40px;padding-top:14px;font-size:10px;display:flex}.youten-result-line p{margin:0}.youten-result-line strong{color:#fff;font-size:14px}.youten-result-line small{color:#aeb4af;margin-left:6px;font-size:9px}.youten-result-line button{border:1px solid var(--orange);background:var(--orange);min-height:44px;color:var(--ink);cursor:pointer;padding:0 14px;font-size:9px;font-weight:900}.youten-course-groups{border-top:1px solid #515752}.youten-course-group{border-bottom:1px solid #515752}.youten-course-group>header{background:var(--lime);min-height:105px;color:var(--ink);border-bottom:1px solid var(--ink);grid-template-columns:1fr auto auto;align-items:center;gap:28px;padding:18px 22px;display:grid}.youten-course-group>header>div{flex-direction:column;display:flex}.youten-course-group>header>div h3{letter-spacing:-.07em;margin:0;font-size:31px;font-weight:950}.youten-course-group>header>div small{margin-top:6px;font-size:9px;font-weight:800}.youten-course-group>header p{margin:0;font-size:10px}.youten-course-group>header>a{border:1px solid var(--ink);background:#ffffff59;align-items:center;min-height:44px;padding:0 14px;font-size:9px;font-weight:900;display:inline-flex}.youten-unit-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;padding:12px 0 72px;display:grid}.youten-unit-card{min-width:0;min-height:740px;color:var(--ink);background:#f9f7f0;border:1px solid #626a63;flex-direction:column;padding:24px;scroll-margin-top:76px;display:flex}.youten-unit-meta{grid-template-columns:1fr auto auto auto;align-items:center;gap:8px;font-size:8px;font-weight:900;display:grid}.youten-unit-meta b{background:var(--lime);padding:5px 8px}.youten-unit-meta small{color:var(--muted);font-size:8px}.youten-unit-meta a{border:1px solid var(--ink);background:#fff;align-items:center;min-height:44px;padding:0 9px;display:inline-flex}.youten-unit-card h4{letter-spacing:-.055em;margin:34px 0 12px;font-size:31px;line-height:1.15}.youten-unit-aim{min-height:64px;color:var(--muted);margin:0;font-size:11px;line-height:1.9}.youten-decision-card{border:1px solid var(--ink);background:#fff;margin:24px 0 16px;padding:16px}.youten-decision-card>span{color:var(--muted);border-bottom:1px solid #d1d3cc;padding-bottom:12px;font-size:8px;font-weight:900;display:block}.youten-decision-card dl{margin:0}.youten-decision-card dl div{border-bottom:1px solid #d1d3cc;grid-template-columns:72px 1fr;gap:10px;padding:11px 0;display:grid}.youten-decision-card dl div:last-child{border-bottom:0;padding-bottom:0}.youten-decision-card dt{font-size:9px;font-weight:900}.youten-decision-card dd{color:var(--muted);margin:0;font-size:10px;line-height:1.7}.youten-core-links{grid-template-columns:1fr 1fr;gap:5px;display:grid}.youten-core-links a{background:#fff;border:1px solid #b6b9b2;justify-content:space-between;align-items:center;min-height:46px;padding:10px;font-size:9px;font-weight:800;display:flex}.youten-core-links a:hover{border-color:var(--ink);background:var(--lime)}.youten-search-hits{border:1px solid var(--ink);background:#fff;margin:24px 0 16px;padding:16px}.youten-search-hits>span{color:var(--muted);border-bottom:1px solid #d1d3cc;padding-bottom:12px;font-size:8px;font-weight:900;display:block}.youten-search-hits>div a,.youten-search-hits details a{border-bottom:1px solid #d1d3cc;justify-content:space-between;align-items:center;min-height:48px;padding:9px 10px;font-size:10px;font-weight:900;display:flex}.youten-search-hits>div a:hover,.youten-search-hits details a:hover{background:var(--lime)}.youten-search-hits>p{color:var(--muted);margin:14px 0 0;font-size:10px;line-height:1.8}.youten-search-hits details{margin-top:10px}.youten-search-hits summary{cursor:pointer;border:1px solid #b6b9b2;justify-content:space-between;align-items:center;min-height:44px;padding:0 10px;font-size:9px;font-weight:900;list-style:none;display:flex}.youten-search-hits summary::-webkit-details-marker{display:none}.youten-search-hits details[open] summary b{transform:rotate(45deg)}.youten-all-topics{border:1px solid var(--ink);background:#fff;margin-top:14px}.youten-all-topics summary{cursor:pointer;justify-content:space-between;align-items:center;min-height:48px;padding:0 13px;font-size:9px;font-weight:900;list-style:none;display:flex}.youten-all-topics summary::-webkit-details-marker{display:none}.youten-all-topics[open] summary b{transform:rotate(45deg)}.youten-all-topics>div{border-top:1px solid var(--ink);scrollbar-width:thin;scrollbar-color:var(--ink) #e4e3dc;max-height:360px;overflow-y:auto}.youten-all-topics>div a{border-bottom:1px solid #dcddd6;grid-template-columns:28px 1fr auto;align-items:center;gap:8px;min-height:44px;padding:8px 12px;font-size:9px;display:grid}.youten-all-topics>div a:last-child{border-bottom:0}.youten-all-topics>div a:hover{background:var(--lime)}.youten-all-topics>div a span{color:var(--muted);font-size:8px}.youten-unit-sequence{grid-template-columns:1fr 1fr;gap:5px;margin-top:14px;display:grid}.youten-unit-sequence>span{min-height:1px}.youten-sequence-link{background:#fff;border:1px solid #b6b9b2;flex-direction:column;justify-content:center;min-height:66px;padding:10px 11px;display:flex}.youten-sequence-link:last-of-type{text-align:right}.youten-sequence-link:hover{border-color:var(--ink);background:var(--cyan)}.youten-sequence-link small{color:var(--muted);font-size:8px;font-weight:900}.youten-sequence-link b{margin-top:6px;font-size:9px;line-height:1.4}.youten-unit-cta{border-top:1px solid var(--ink);justify-content:space-between;align-items:center;min-height:50px;margin-top:auto;padding:15px 0 0;font-size:10px;font-weight:900;display:flex}.youten-empty{text-align:center;border:1px dashed #717872;padding:80px 30px}.youten-empty button{background:var(--lime);min-height:44px;color:var(--ink);cursor:pointer;border:0;padding:0 16px;font-size:9px;font-weight:900}.youten-method{border-bottom:1px solid var(--ink);background:var(--lime);grid-template-columns:.8fr 1.2fr;gap:7vw;padding:105px 6vw 120px;display:grid}.youten-method>div>span{letter-spacing:.16em;font-size:8px;font-weight:900}.youten-method h2{letter-spacing:-.08em;margin:26px 0 20px;font-size:clamp(46px,5vw,70px);line-height:1}.youten-method>div>p{max-width:520px;font-size:12px;line-height:1.9}.youten-method ol{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:1fr 1fr;margin:0;padding:0;list-style:none;display:grid}.youten-method li{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);flex-direction:column;min-height:205px;padding:19px;display:flex}.youten-method li span{font-size:8px;font-weight:900}.youten-method li b{margin-top:32px;font-size:20px}.youten-method li p{margin:auto 0 0;font-size:10px;line-height:1.8}.youten-footer{background:var(--ink);color:#fff;justify-content:space-between;align-items:center;gap:25px;min-height:180px;padding:38px 6vw;display:flex}.youten-footer p{color:#fff;font-size:10px;line-height:1.8}.youten-footer a{min-height:44px;color:var(--lime);text-underline-offset:4px;align-items:center;font-size:9px;font-weight:900;text-decoration:underline;display:inline-flex}.not-found-page{background:#f7f4ea;min-height:100vh}.not-found-hero{grid-template-columns:minmax(260px,.7fr) minmax(0,1.3fr);align-items:center;gap:8vw;min-height:calc(100vh - 72px);padding:8vw;display:grid}.not-found-hero>div:first-child{border:1px solid var(--ink);background:var(--orange);flex-direction:column;justify-content:space-between;align-self:stretch;padding:24px;display:flex}.not-found-hero>div:first-child span{letter-spacing:.16em;font-size:8px;font-weight:900}.not-found-hero>div:first-child strong{letter-spacing:-.12em;font-size:clamp(110px,18vw,270px);line-height:.75}.not-found-hero>div:last-child>p:first-child{letter-spacing:.16em;font-size:8px;font-weight:900}.not-found-hero h1{letter-spacing:-.075em;margin:28px 0;font-size:clamp(42px,5.7vw,82px);line-height:1.02}.not-found-hero>div:last-child>p:nth-of-type(2){max-width:720px;color:var(--muted);font-size:13px;line-height:2}.not-found-hero nav{grid-template-columns:1fr 1fr;gap:7px;max-width:760px;margin-top:38px;display:grid}.not-found-hero nav a{border:1px solid var(--ink);background:#fff;justify-content:space-between;align-items:center;min-height:58px;padding:0 16px;font-size:9px;font-weight:900;display:flex}.not-found-hero nav a:first-child{background:var(--lime);grid-column:1/-1}@media (max-width:1180px){.formula-grid,.curriculum-watch-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.youten-course-rail>div{grid-template-columns:repeat(5,minmax(0,1fr))}}@media (max-width:900px){.not-found-hero{grid-template-columns:1fr;padding:55px 5vw 75px}.not-found-hero>div:first-child{min-height:240px}.not-found-hero>div:first-child strong{font-size:120px}.youten-hero{grid-template-columns:1fr;min-height:0}.youten-hero .breadcrumbs{grid-column:1;padding:20px 5vw 0}.youten-hero-copy{padding:50px 5vw 65px}.youten-hero-copy h1{font-size:clamp(49px,13vw,70px)}.youten-hero-copy>p:last-of-type{font-size:15px}.youten-hero-board{min-height:560px;padding:42px 6vw}.youten-hero-search input{min-height:52px;font-size:16px}.youten-metrics{grid-template-columns:1fr 1fr}.youten-metrics>div:nth-child(2){border-right:0}.youten-metrics>div:nth-child(-n+2){border-bottom:1px solid var(--ink)}.youten-promo{grid-template-columns:1fr;gap:32px;padding:62px 5vw}.youten-promo>a{grid-column:1}.youten-course-rail{grid-template-columns:1fr;gap:14px;padding:18px 5vw}.youten-course-rail>p{flex-direction:row;justify-content:space-between;align-items:center}.youten-course-rail>p b{margin:0}.youten-course-rail>div{scrollbar-width:thin;border-left:0;display:flex;overflow-x:auto}.youten-course-rail a{border-left:1px solid var(--ink);flex:0 0 116px}.youten-routes,.curriculum-watch,.formula-desk,.youten-guide{padding:75px 5vw 90px}.youten-section-heading{grid-template-columns:1fr;gap:28px}.youten-section-heading h2{font-size:48px}.youten-route-grid{grid-template-columns:1fr}.youten-route-card{min-height:520px}.formula-grid{grid-template-columns:1fr 1fr}.formula-card{min-height:325px}.curriculum-watch-grid{grid-template-columns:1fr 1fr}.curriculum-watch-grid>a{min-height:270px}.youten-course-group>header{grid-template-columns:1fr auto}.youten-course-group>header>a{grid-column:1/-1;justify-content:center}.youten-unit-grid{grid-template-columns:1fr}.youten-unit-card,.youten-unit-aim{min-height:0}.youten-method{grid-template-columns:1fr;padding:75px 5vw 90px}.youten-footer{flex-wrap:wrap}.youten-search input{min-height:52px;font-size:16px}.youten-filter-tabs button,.youten-domain-tabs button,.youten-quick-search button,.youten-core-links a,.youten-all-topics summary,.youten-all-topics>div a,.youten-unit-cta,.youten-course-group>header>a{font-size:10px}}@media (max-width:520px){.not-found-hero nav{grid-template-columns:1fr}.not-found-hero nav a:first-child{grid-column:1}.youten-hero-copy h1{font-size:clamp(43px,12.5vw,58px);line-height:.97}.youten-hero-actions{grid-template-columns:1fr}.youten-hero-search b{padding:0 9px}.youten-hero-search button{padding:0 12px}.youten-metrics{grid-template-columns:1fr}.youten-metrics>div{border-right:0;border-bottom:1px solid var(--ink)}.youten-promo-copy dl,.formula-grid{grid-template-columns:1fr}.formula-card{min-height:300px}.curriculum-watch-grid{grid-template-columns:1fr}.curriculum-watch-grid>a{min-height:235px}.youten-route-card{min-height:0;padding:18px}.youten-route-card h3{margin-top:36px}.youten-route-card ol{margin-top:32px}.youten-route-card li a{grid-template-columns:52px 1fr auto;gap:8px}.youten-search kbd{display:none}.youten-search b{padding:0 10px}.youten-quick-search{align-items:flex-start}.youten-quick-search>span{width:100%}.youten-result-line{flex-direction:column;align-items:flex-start;gap:12px}.youten-course-group>header{grid-template-columns:1fr;gap:12px}.youten-course-group>header>a{grid-column:1}.youten-course-group>header p{display:none}.youten-filter-tabs button,.youten-domain-tabs button,.youten-quick-search button{min-height:48px}.youten-unit-card{padding:18px}.youten-unit-card h4{font-size:27px}.youten-core-links,.youten-unit-sequence{grid-template-columns:1fr}.youten-unit-sequence>span{display:none}.youten-sequence-link:last-of-type{text-align:left}.youten-unit-meta{grid-template-columns:1fr auto auto}.youten-unit-meta a{grid-column:1/-1;justify-content:center}.youten-method ol{grid-template-columns:1fr}.youten-footer{flex-direction:column;align-items:flex-start}}.youten-page{--broadcast-black:#090a0c;--broadcast-paper:#f4f0e6;--broadcast-lime:#dfff32;--broadcast-red:#ff4b2b;--broadcast-red-ink:#b83b00;--broadcast-blue:#70ddff;background:var(--broadcast-paper);font-family:var(--font-geist-sans), "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;line-break:strict}.youten-header{border-bottom:2px solid var(--broadcast-lime);color:#fff;background:#090a0cf7;min-height:82px;padding:0 3vw}.youten-header .brand{align-items:center;gap:13px;min-height:52px}.youten-header .brand span{letter-spacing:-.055em;font-size:28px}.youten-header .brand b{max-width:185px;color:var(--broadcast-lime);letter-spacing:.13em;white-space:normal;font-size:11px;line-height:1.35}.youten-edition{color:#fff;border:1px solid #686c71;padding:5px 8px;font-size:10px;font-style:normal;font-weight:900}.youten-header nav{gap:8px}.youten-header nav a{border:1px solid #45484d;align-items:center;min-height:50px;padding:0 17px;font-size:11px;font-weight:900;display:inline-flex}.youten-hero{background:var(--broadcast-black);color:#fff;border-bottom:0;grid-template-columns:minmax(0,1.38fr) minmax(390px,.62fr);min-height:calc(100vh - 82px)}.youten-hero .breadcrumbs{color:#c6c7c9;padding:25px 4.5vw 0;font-size:11px}.youten-hero .breadcrumbs a{align-items:center;min-height:44px;display:inline-flex}.youten-hero-copy{padding:44px 4.5vw 76px;position:relative;overflow:hidden}.youten-hero-copy:after{content:"MATH";z-index:0;color:#0000;-webkit-text-stroke:1px #2e3135;letter-spacing:-.1em;pointer-events:none;font-size:clamp(120px,19vw,310px);font-weight:950;line-height:.7;position:absolute;bottom:-3vw;right:-2vw}.youten-hero-copy>*{z-index:1;position:relative}.youten-broadcast-status{color:#d4d5d6;letter-spacing:.12em;border-top:1px solid #42454a;border-bottom:1px solid #42454a;grid-template-columns:auto 1fr auto;align-items:center;gap:18px;max-width:820px;margin-bottom:42px;padding:11px 0;font-size:9px;font-weight:900;display:grid}.youten-broadcast-status i{background:var(--broadcast-red);border-radius:50%;width:10px;height:10px;margin-right:8px;display:inline-block;box-shadow:0 0 0 5px #ff4b2b24}.youten-broadcast-status time{color:var(--broadcast-lime);font-size:9px}.youten-hero-copy .eyebrow{color:var(--broadcast-lime);margin-bottom:24px;font-size:10px;line-height:1.6}.youten-hero-copy h1{letter-spacing:-.055em;max-width:1020px;font-size:clamp(72px,7.7vw,132px);line-height:.92}.youten-hero-copy>p:last-of-type{color:#d1d2d3;max-width:830px;margin-top:38px;font-size:17px;line-height:1.95}.youten-hero-search{max-width:830px;margin-top:34px}.youten-hero-search>label{color:#fff;margin-bottom:11px;font-size:11px}.youten-hero-search>div{min-height:74px;box-shadow:9px 9px 0 var(--broadcast-lime);border:2px solid #fff}.youten-hero-search input{min-height:70px;font-size:17px}.youten-hero-search button{border-left:2px solid var(--broadcast-black);background:var(--broadcast-lime);min-width:128px;font-size:11px}.youten-hero-actions{gap:10px;max-width:830px}.youten-hero-actions a{background:var(--broadcast-lime);min-height:66px;color:var(--broadcast-black);border-width:2px;font-size:12px}.youten-hero-actions a:last-child{color:#fff;background:0 0;border-color:#fff}.youten-hero-board{border-left:2px solid var(--broadcast-black);background:var(--broadcast-paper);color:var(--broadcast-black);padding:50px 2.8vw 42px}.youten-hero-board>span{color:var(--broadcast-red-ink);font-size:10px}.youten-hero-board ol{border-top:2px solid var(--broadcast-black);margin-top:44px}.youten-hero-board li{border-bottom:2px solid var(--broadcast-black);grid-template-columns:92px 1fr;min-height:132px}.youten-hero-board li>b{color:var(--broadcast-red-ink);font-size:10px}.youten-hero-board li strong{letter-spacing:-.055em;font-size:34px}.youten-hero-board li small{color:#53565a;font-size:11px;line-height:1.6}.youten-hero-board>p{border:2px solid var(--broadcast-black);background:var(--broadcast-red);color:var(--broadcast-black);padding:24px;font-size:13px}.youten-hero-board>p b{letter-spacing:.14em;font-size:9px}.youten-broadcast-ticker{border-top:2px solid var(--broadcast-black);border-bottom:2px solid var(--broadcast-black);background:var(--broadcast-lime);color:var(--broadcast-black);overflow:hidden}.youten-broadcast-ticker>div{align-items:center;gap:34px;min-width:max-content;min-height:58px;padding:0 3vw;font-size:13px;font-weight:950;display:flex}.youten-broadcast-ticker span{background:var(--broadcast-black);color:#fff;letter-spacing:.12em;padding:8px 11px;font-size:9px}@media (max-width:980px){.youten-header{min-height:74px}.youten-header nav a:not(.header-search-link):not(.header-formula-link){display:none}.youten-header nav a{min-height:52px;padding:0 18px}.youten-hero{grid-template-columns:1fr;min-height:0}.youten-hero .breadcrumbs{grid-column:1;padding:22px 5vw 0}.youten-hero-copy{padding:42px 5vw 72px}.youten-hero-copy h1{font-size:clamp(64px,13.5vw,105px)}.youten-hero-board{border-top:2px solid var(--broadcast-black);border-left:0;min-height:0;padding:44px 5vw}.youten-hero-board li{min-height:114px}}@media (max-width:560px){.youten-header{padding:0 4vw}.youten-header .brand span{font-size:25px}.youten-header .brand b,.youten-edition{display:none}.youten-header nav a{min-height:52px;padding:0 14px;font-size:11px}.youten-broadcast-status{grid-template-columns:1fr auto;gap:10px}.youten-broadcast-status b{grid-area:2/1/auto/-1}.youten-hero-copy{padding-bottom:62px}.youten-hero-copy h1{font-size:clamp(52px,15.2vw,78px);line-height:.94}.youten-hero-copy>p:last-of-type{font-size:16px;line-height:1.85}.youten-hero-search>div{min-height:68px;box-shadow:6px 6px 0 var(--broadcast-lime)}.youten-hero-search input{min-height:64px;font-size:16px}.youten-hero-search button{min-width:94px;padding:0 10px}.youten-hero-actions{grid-template-columns:1fr}.youten-hero-actions a{min-height:62px}.youten-hero-board li{grid-template-columns:76px 1fr}.youten-hero-board li strong{font-size:30px}.youten-broadcast-ticker>div{gap:22px;min-height:54px}}.youten-page{color:var(--broadcast-black);overflow-x:clip}.youten-page :is(h1,h2,h3,h4,strong,b){font-weight:900}.youten-page :is(#routes,#formulas,#guide,.youten-course-group){scroll-margin-top:96px}.youten-page :is(a,button,input,summary):focus-visible{outline-offset:3px;box-shadow:0 0 0 7px var(--broadcast-black);outline:3px solid #fff}.youten-page :is(a,button,summary){-webkit-tap-highlight-color:#dfff3259}.youten-page button,.youten-page summary{font-family:inherit}.youten-hero-copy h1>span{color:#fff;letter-spacing:.04em;background:#17191c;border:1px solid #565a60;max-width:max-content;margin-bottom:20px;padding:9px 12px;font-size:clamp(14px,1.15vw,19px);line-height:1.2;display:block}.youten-site-context{border-bottom:2px solid var(--broadcast-black);background:var(--broadcast-paper);grid-template-columns:minmax(0,1fr) minmax(280px,420px);align-items:center;gap:28px;min-height:138px;padding:24px 4.5vw;display:grid}.youten-site-context p{grid-template-columns:auto 1fr;align-items:center;gap:7px 18px;margin:0;display:grid}.youten-site-context p span{background:var(--broadcast-red);color:var(--broadcast-black);letter-spacing:.08em;padding:7px 10px;font-size:11px;font-weight:900}.youten-site-context p b{letter-spacing:-.045em;font-size:clamp(20px,2vw,30px)}.youten-site-context p small{color:#55585d;grid-column:2;font-size:13px;line-height:1.7}.youten-site-context>a{border:2px solid var(--broadcast-black);min-height:62px;box-shadow:7px 7px 0 var(--broadcast-black);background:#fff;justify-content:space-between;align-items:center;padding:0 18px;font-size:13px;font-weight:900;display:flex}.youten-site-context>a:hover{background:var(--broadcast-lime)}.youten-metrics{border-bottom:2px solid var(--broadcast-black)}.youten-metrics>div{border-right:2px solid var(--broadcast-black);min-height:176px;padding:28px 3vw}.youten-metrics>div:nth-child(4){background:var(--broadcast-red);color:var(--broadcast-black)}.youten-metrics>div:nth-child(4) :is(span,small){color:var(--broadcast-black)}.youten-metrics span{color:#34373b;font-size:11px}.youten-metrics strong{font-size:clamp(54px,5vw,78px)}.youten-metrics small{color:#3e4145;max-width:130px;font-size:12px;line-height:1.55}.youten-course-rail{border-bottom:2px solid var(--broadcast-black);background:var(--broadcast-black);color:#fff;grid-template-columns:240px 1fr;gap:24px;padding:24px 4.5vw 28px}.youten-course-rail>p span{color:var(--broadcast-lime);font-size:11px}.youten-course-rail>p b{margin-top:10px;font-size:18px}.youten-course-rail>div{border-width:2px 0 0 2px;border-color:#fff}.youten-course-rail a{border-width:0 2px 2px 0;border-color:var(--broadcast-black);min-height:100px;color:var(--broadcast-black);padding:14px 12px}.youten-course-rail a:hover{z-index:1;box-shadow:0 5px 0 var(--broadcast-lime);transform:translateY(-5px)}.youten-course-rail a span{font-size:16px}.youten-course-rail a small{color:#35383c;font-size:11px}.youten-routes,.curriculum-watch,.formula-desk,.youten-guide{padding:112px 4.5vw 128px}.youten-routes{border-bottom:2px solid var(--broadcast-black);background:var(--broadcast-paper)}.youten-section-heading{grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);gap:8vw;margin-bottom:68px}.youten-section-heading>div{border-left:12px solid var(--broadcast-red);padding-left:24px}.youten-section-heading>div>span{font-size:11px}.youten-section-heading h2{text-wrap:balance;font-size:clamp(54px,5.4vw,84px);line-height:.98}.youten-section-heading>p{font-size:16px;line-height:1.9}.youten-route-grid{gap:18px}.youten-route-card{border:2px solid var(--broadcast-black);min-height:610px;box-shadow:9px 9px 0 var(--broadcast-black);padding:28px}.youten-route-card>header{font-size:11px}.youten-route-card>header b{padding:9px 11px}.youten-route-card h3{margin-top:54px;font-size:clamp(38px,3.6vw,58px)}.youten-route-card>p{font-size:15px;line-height:1.85}.youten-route-card ol{padding-top:34px}.youten-route-card li{border-top-width:2px}.youten-route-card li:last-child{border-bottom-width:2px}.youten-route-card li a{grid-template-columns:72px 1fr auto;min-height:74px;padding:11px 14px}.youten-route-card li small{font-size:11px}.youten-route-card li strong{font-size:14px;line-height:1.45}.youten-route-card li span{font-size:20px}.curriculum-watch{border-bottom:2px solid var(--broadcast-black);background:var(--broadcast-blue)}.curriculum-watch .youten-section-heading>div{border-left-color:var(--broadcast-black)}.curriculum-watch-grid{border-width:2px 0 0 2px;gap:0}.curriculum-watch-grid>a{background:#ffffff7a;border-width:0 2px 2px 0;min-height:330px;padding:24px}.curriculum-watch-grid>a:hover{background:var(--broadcast-lime)}.curriculum-watch-grid span{font-size:11px}.curriculum-watch-grid h3{font-size:28px}.curriculum-watch-grid p{font-size:14px;line-height:1.8}.curriculum-watch-grid b{padding-top:16px;font-size:12px}.curriculum-source{margin-top:30px;font-size:12px;line-height:1.8}.curriculum-source a{align-items:center;min-height:46px;display:inline-flex}.formula-desk{border-bottom:2px solid var(--broadcast-black);background:#fffdf8}.formula-grid{border-width:2px 0 0 2px;grid-template-columns:repeat(3,minmax(0,1fr))}.formula-card{border-width:0 2px 2px 0;min-height:400px;padding:26px}.formula-card:hover{z-index:1;background:var(--broadcast-lime);box-shadow:7px 7px 0 var(--broadcast-black);position:relative;transform:translate(-3px,-3px)}.formula-card>div{font-size:11px}.formula-card>div b{padding:7px 10px}.formula-card>p{margin-top:34px;font-size:13px}.formula-card>strong{font-size:clamp(23px,2vw,31px);line-height:1.45}.formula-card>dl{margin-top:24px}.formula-card>dl div{grid-template-columns:52px 1fr;gap:12px;padding:11px 0}.formula-card>dl dt{font-size:11px}.formula-card>dl dd{font-size:13px;line-height:1.7}.formula-card>i{padding-top:17px;font-size:12px}.youten-guide{background:var(--broadcast-black)}.youten-finder{background:#17191c;border:2px solid #62666c;margin-bottom:70px;padding:24px}.youten-search>label{color:#fff;letter-spacing:.08em;margin-bottom:12px;font-size:12px;font-weight:900;display:block}.youten-search>div{min-height:72px;box-shadow:9px 9px 0 var(--broadcast-lime);border-width:2px}.youten-search input{min-height:68px;font-size:17px}.youten-search kbd{font-size:12px}.youten-query-clear{flex-basis:50px;width:50px;height:50px}.youten-quick-search{gap:9px;margin-top:22px}.youten-quick-search>span,.youten-domain-tabs>span{color:#fff;font-size:11px}.youten-quick-search button,.youten-filter-tabs button,.youten-domain-tabs button{border-width:2px;min-height:52px;padding:0 17px;font-size:13px}.youten-filter-tabs{gap:9px;margin-top:22px}.youten-domain-tabs{gap:9px;margin-top:14px}.youten-result-line{min-height:58px;padding-top:20px;font-size:13px}.youten-result-line strong{font-size:19px}.youten-result-line small{font-size:12px}.youten-result-line button{min-height:52px;padding:0 18px;font-size:13px}.youten-course-groups,.youten-course-group{border-width:2px}.youten-course-group>header{border-bottom-width:2px;min-height:126px;padding:24px 28px}.youten-course-group>header>div h3{font-size:40px}.youten-course-group>header>div small{font-size:12px}.youten-course-group>header p{font-size:13px}.youten-course-group>header p strong{font-size:20px}.youten-course-group>header>a{background:#fff;border-width:2px;min-height:56px;padding:0 18px;font-size:13px}.youten-unit-grid{gap:14px;padding:18px 0 84px}.youten-unit-card{background:var(--broadcast-paper);border:2px solid #656a68;min-height:820px;padding:28px}.youten-unit-card.search-result{min-height:0}.youten-unit-meta{gap:10px;font-size:11px}.youten-unit-meta b{padding:7px 10px}.youten-unit-meta small{font-size:11px}.youten-unit-meta a{border-width:2px;min-height:52px;padding:0 13px;font-size:12px}.youten-unit-card h4{margin-top:40px;font-size:clamp(34px,3.2vw,48px)}.youten-unit-aim{min-height:74px;font-size:15px;line-height:1.8}.youten-decision-card{border-width:2px;margin-top:28px;padding:20px}.youten-decision-card>span{font-size:11px}.youten-decision-card dl div{grid-template-columns:92px 1fr;padding:14px 0}.youten-decision-card dt{font-size:12px}.youten-decision-card dd{font-size:14px;line-height:1.75}.youten-core-links{gap:8px}.youten-core-links a{border-width:2px;min-height:60px;padding:12px 14px;font-size:13px;line-height:1.45}.youten-search-hits{border-width:2px;padding:20px}.youten-search-hits>span{font-size:11px}.youten-search-hits>div a,.youten-search-hits details a{min-height:58px;font-size:13px}.youten-search-hits>p{font-size:13px}.youten-search-hits summary{border-width:2px;min-height:54px;font-size:12px}.youten-all-topics{border-width:2px;margin-top:18px}.youten-all-topics summary{min-height:58px;padding:0 16px;font-size:13px}.youten-all-topics>div a{grid-template-columns:36px 1fr auto;min-height:54px;padding:10px 14px;font-size:13px}.youten-all-topics>div a span{font-size:11px}.youten-all-topics>div a b{font-size:14px}.youten-unit-sequence{gap:8px;margin-top:18px}.youten-sequence-link{border-width:2px;min-height:78px;padding:13px 15px}.youten-sequence-link small{font-size:11px}.youten-sequence-link b{font-size:13px}.youten-unit-cta{min-height:64px;padding-top:18px;font-size:14px}.youten-empty strong{font-size:30px}.youten-empty p{font-size:15px}.youten-empty button{min-height:56px;padding:0 20px;font-size:13px}.youten-method{border-bottom:2px solid var(--broadcast-black);background:var(--broadcast-red);color:var(--broadcast-black);padding:112px 4.5vw 128px}.youten-method>div>span{font-size:11px}.youten-method h2{font-size:clamp(52px,5.4vw,82px)}.youten-method>div>p{font-size:16px}.youten-method ol{border-width:2px 0 0 2px;border-color:var(--broadcast-black)}.youten-method li{border-width:0 2px 2px 0;border-color:var(--broadcast-black);min-height:230px;padding:24px}.youten-method li span{font-size:12px}.youten-method li b{font-size:25px}.youten-method li p{font-size:14px;line-height:1.75}.youten-footer{border-top:12px solid var(--broadcast-lime);align-items:stretch;min-height:260px;padding:48px 4.5vw}.youten-footer p{flex-direction:column;justify-content:center;margin:0;font-size:13px;display:flex}.youten-footer p span{color:var(--broadcast-lime);letter-spacing:.12em;font-size:11px;font-weight:900}.youten-footer p b{margin-top:12px;font-size:clamp(24px,2.5vw,38px)}.youten-footer p small{color:#ced1d0;margin-top:10px;font-size:13px}.youten-footer nav{grid-template-columns:1fr 1fr;align-content:center;gap:10px;min-width:min(100%,640px);display:grid}.youten-footer nav a{color:#fff;border:2px solid #656a68;justify-content:space-between;min-height:58px;padding:0 17px;font-size:13px;text-decoration:none}.youten-footer nav a.primary{border-color:var(--broadcast-lime);background:var(--broadcast-lime);color:var(--broadcast-black);grid-column:1/-1}.youten-footer nav a:hover{color:var(--broadcast-black);background:#fff;border-color:#fff}@media (max-width:1180px){.formula-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.curriculum-watch-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.youten-course-rail{grid-template-columns:1fr}.youten-course-rail>p{flex-direction:row;justify-content:space-between;align-items:end}}@media (max-width:980px){.youten-site-context{grid-template-columns:1fr;padding:30px 5vw 36px}.youten-site-context>a{max-width:520px}.youten-metrics>div{min-height:158px}.youten-routes,.curriculum-watch,.formula-desk,.youten-guide,.youten-method{padding:82px 5vw 96px}.youten-section-heading{grid-template-columns:1fr;gap:30px;margin-bottom:50px}.youten-section-heading h2{font-size:clamp(48px,8.5vw,72px)}.youten-route-grid{grid-template-columns:1fr}.youten-route-card{min-height:0}.youten-course-group>header{grid-template-columns:1fr auto}.youten-course-group>header>a{grid-column:1/-1;justify-content:center}.youten-unit-grid{grid-template-columns:1fr}.youten-unit-card,.youten-unit-aim{min-height:0}.youten-method{grid-template-columns:1fr}.youten-footer{flex-direction:column}.youten-footer nav{width:100%}}@media (max-width:640px){.youten-header{min-height:70px}.youten-header .brand span{font-size:27px}.youten-header nav a{min-height:52px}.youten-hero .breadcrumbs{font-size:12px}.youten-hero-copy h1>span{margin-bottom:16px;font-size:13px}.youten-site-context p{grid-template-columns:1fr}.youten-site-context p small{grid-column:1}.youten-site-context>a{min-height:58px;font-size:13px}.youten-metrics{grid-template-columns:1fr 1fr}.youten-metrics>div{border-right:2px solid var(--broadcast-black);border-bottom:2px solid var(--broadcast-black);min-height:148px}.youten-metrics>div:nth-child(2n){border-right:0}.youten-metrics strong{font-size:52px}.youten-course-rail{padding:24px 5vw 30px}.youten-course-rail>p{flex-direction:column;align-items:flex-start}.youten-course-rail>div{border:0;gap:8px}.youten-course-rail a{border:2px solid var(--broadcast-black);flex-basis:128px;min-height:96px}.youten-routes,.curriculum-watch,.formula-desk,.youten-guide,.youten-method{padding-top:72px;padding-bottom:82px}.youten-section-heading>div{border-left-width:8px;padding-left:17px}.youten-section-heading h2{font-size:clamp(42px,12vw,58px)}.youten-section-heading>p{font-size:15px}.youten-route-card{box-shadow:6px 6px 0 var(--broadcast-black);padding:21px}.youten-route-card h3{margin-top:42px;font-size:39px}.youten-route-card li a{grid-template-columns:58px 1fr auto;min-height:72px;padding-inline:10px}.curriculum-watch-grid{grid-template-columns:1fr}.curriculum-watch-grid>a{min-height:245px}.formula-grid{grid-template-columns:1fr}.formula-card{min-height:360px}.youten-finder{padding:17px}.youten-search>div{min-height:68px;box-shadow:6px 6px 0 var(--broadcast-lime)}.youten-search b{padding-inline:10px}.youten-search input{min-height:64px;font-size:16px}.youten-quick-search>span,.youten-domain-tabs>span{width:100%}.youten-quick-search button,.youten-filter-tabs button,.youten-domain-tabs button{min-height:52px;font-size:13px}.youten-result-line{flex-direction:column;align-items:flex-start;gap:14px}.youten-course-group>header{grid-template-columns:1fr;gap:14px}.youten-course-group>header>a{grid-column:1}.youten-course-group>header p{display:block}.youten-unit-card{padding:20px}.youten-unit-meta{grid-template-columns:1fr auto auto}.youten-unit-meta a{grid-column:1/-1;justify-content:center}.youten-unit-card h4{font-size:34px}.youten-core-links,.youten-unit-sequence{grid-template-columns:1fr}.youten-unit-sequence>span{display:none}.youten-sequence-link:last-of-type{text-align:left}.youten-method ol,.youten-footer nav{grid-template-columns:1fr}.youten-footer nav a.primary{grid-column:1}}@media (max-width:420px){.youten-metrics{grid-template-columns:1fr}.youten-metrics>div,.youten-metrics>div:nth-child(2n){border-right:0;min-height:132px}.youten-hero-search button{min-width:90px}.youten-route-card li a{grid-template-columns:1fr auto}.youten-route-card li small{grid-column:1/-1}.youten-decision-card dl div{grid-template-columns:1fr;gap:5px}}@media (prefers-reduced-motion:reduce){.youten-page *{scroll-behavior:auto!important;transition-duration:.01ms!important}}.youten-page{--broadcast-black:#182233;--broadcast-paper:#fffdf8;--broadcast-lime:#eaf7b8;--broadcast-red:#ffd6cc;--broadcast-red-ink:#8a2c18;--broadcast-blue:#d9f2ff;--pastel-mint:#dff5e9;--pastel-pink:#ffe2ec;--pastel-lavender:#eee7ff;--pastel-yellow:#fff3bd;color:var(--broadcast-black);background:#fffdf8}.youten-header{border-bottom-color:var(--broadcast-black);color:var(--broadcast-black);background:#fffdf8f7;box-shadow:0 5px #18223314}.youten-header .brand b{color:#315d70}.youten-edition{background:var(--pastel-pink);color:var(--broadcast-black);border-color:#aeb6c2}.youten-header nav a{color:var(--broadcast-black);background:#fff;border-color:#aeb6c2}.youten-header nav a:hover,.youten-header .header-search-link{border-color:var(--broadcast-black);background:var(--broadcast-lime);color:var(--broadcast-black)}.youten-hero{color:var(--broadcast-black);background:#fffdf8}.youten-hero .breadcrumbs{color:#4c596a}.youten-hero .breadcrumbs b{color:var(--broadcast-black)}.youten-hero-copy{background:#fffdf8}.youten-hero-copy:after{-webkit-text-stroke-color:#dce3ea}.youten-broadcast-status{color:#4c596a;border-color:#aeb6c2}.youten-broadcast-status>span{color:var(--broadcast-black)}.youten-broadcast-status time,.youten-hero-copy .eyebrow{color:#496400}.youten-hero-copy h1 em{color:#2b5ea8}.youten-hero-copy h1>span{border-color:var(--broadcast-black);background:var(--broadcast-blue);color:var(--broadcast-black)}.youten-hero-copy>p:last-of-type{color:#3e4a59}.youten-hero-copy>p:last-of-type b,.youten-hero-search>label{color:var(--broadcast-black)}.youten-hero-search>div{border-color:var(--broadcast-black);box-shadow:9px 9px 0 var(--pastel-mint);background:#fff}.youten-hero-actions a{background:var(--pastel-mint);color:var(--broadcast-black)}.youten-hero-actions a:last-child{border-color:var(--broadcast-black);background:var(--broadcast-blue);color:var(--broadcast-black)}.youten-hero-board{border-color:var(--broadcast-black);background:var(--pastel-lavender);color:var(--broadcast-black)}.youten-hero-board li small{color:#465263}.youten-hero-board>p{background:var(--broadcast-red);color:var(--broadcast-black)}.youten-broadcast-ticker{background:var(--broadcast-lime);color:var(--broadcast-black)}.youten-broadcast-ticker span{border:1px solid var(--broadcast-black);color:var(--broadcast-black);background:#fff}.youten-site-context{background:#fff}.youten-site-context>a{background:var(--pastel-yellow);box-shadow:7px 7px 0 var(--pastel-pink)}.youten-metrics,.youten-metrics>div:first-child{background:#fff}.youten-metrics>div:nth-child(2){background:var(--broadcast-blue)}.youten-metrics>div:nth-child(3){background:var(--pastel-mint)}.youten-metrics>div:nth-child(4){background:var(--pastel-pink)}.youten-course-rail{color:var(--broadcast-black);background:#fff}.youten-course-rail>p span{color:#315d70}.youten-course-rail>div{border-color:var(--broadcast-black)}.youten-course-rail a.green{background:#dff5e9}.youten-course-rail a.coral{background:#ffe1d8}.youten-course-rail a.cyan{background:#dcf6f7}.youten-course-rail a.lime{background:#edf8c9}.youten-course-rail a.orange{background:#ffe5cb}.youten-course-rail a.blue{background:#dfefff}.youten-course-rail a.violet{background:#eee7ff}.youten-course-rail a.pink{background:#ffe2ec}.youten-course-rail a.yellow{background:#fff3bd}.youten-routes{background:#fffaf3}.youten-route-card{background:#fff;box-shadow:9px 9px #dce8ef}.youten-route-card.green{--route-color:#dff5e9;background:#f8fdf9}.youten-route-card.coral{--route-color:#ffe1d8;background:#fff9f7}.youten-route-card.cyan{--route-color:#dcf6f7;background:#f7fdfe}.youten-route-card.orange{--route-color:#ffe5cb;background:#fffbf6}.curriculum-watch{background:var(--broadcast-blue)}.curriculum-watch-grid>a{background:#ffffffb8}.formula-desk,.formula-card{background:#fff}.formula-card:nth-child(3n+2){background:#fffaf3}.formula-card:hover{background:var(--broadcast-lime);box-shadow:7px 7px #dce8ef}.youten-guide{background:var(--pastel-lavender);color:var(--broadcast-black)}.youten-guide .youten-section-heading>div{border-left-color:#9dc7d9}.youten-section-heading.light>div>span,.youten-section-heading.light>p{color:#3f4c5d}.youten-finder{border-color:var(--broadcast-black);background:#fff;box-shadow:10px 10px #d9d0f2}.youten-search>label{color:var(--broadcast-black)}.youten-search>div{border-color:var(--broadcast-black);box-shadow:9px 9px 0 var(--pastel-mint);color:var(--broadcast-black);background:#fff}.youten-query-clear{color:var(--broadcast-black);background:#edf0f3}.youten-quick-search>span,.youten-domain-tabs>span{color:#3f4c5d}.youten-quick-search button,.youten-filter-tabs button,.youten-domain-tabs button{color:var(--broadcast-black);background:#fff;border-color:#8c98a7}.youten-filter-tabs button span{color:#4c596a}:is(.youten-quick-search button:hover,.youten-quick-search button:focus-visible){border-color:var(--broadcast-black);background:var(--pastel-pink);color:var(--broadcast-black)}.youten-filter-tabs button[aria-pressed=true]{border-color:var(--broadcast-black);background:var(--broadcast-lime);color:var(--broadcast-black)}.youten-domain-tabs button[aria-pressed=true]{border-color:var(--broadcast-black);background:var(--broadcast-blue);color:var(--broadcast-black)}.youten-result-line{color:#3f4c5d}.youten-result-line strong{color:var(--broadcast-black)}.youten-result-line small{color:#4c596a}.youten-course-groups,.youten-course-group{border-color:#748091}.youten-course-group.green>header{background:#dff5e9}.youten-course-group.coral>header{background:#ffe1d8}.youten-course-group.cyan>header{background:#dcf6f7}.youten-course-group.orange>header{background:#ffe5cb}.youten-course-group.blue>header{background:#dfefff}.youten-course-group.violet>header{background:#eee7ff}.youten-course-group.pink>header{background:#ffe2ec}.youten-course-group.yellow>header{background:#fff3bd}.youten-unit-card{color:var(--broadcast-black);background:#fff;border-color:#748091}.youten-empty{color:var(--broadcast-black);border-color:#748091}.youten-empty p{color:#4c596a}.youten-method{background:var(--pastel-pink);color:var(--broadcast-black)}.youten-footer{border-top-color:var(--pastel-mint);color:var(--broadcast-black);background:#f7f3ff}.youten-footer p{color:var(--broadcast-black)}.youten-footer p span{color:#315d70}.youten-footer p small{color:#4c596a}.youten-footer nav a{color:var(--broadcast-black);background:#fff;border-color:#748091}.youten-footer nav a.primary{border-color:var(--broadcast-black);background:var(--broadcast-lime);color:var(--broadcast-black)}.youten-footer nav a:hover{border-color:var(--broadcast-black);background:var(--broadcast-blue);color:var(--broadcast-black)}@media (max-width:640px){.youten-header .header-formula-link{display:none}.youten-broadcast-ticker{overflow:visible}.youten-broadcast-ticker>div{flex-wrap:wrap;justify-content:center;gap:10px 14px;min-width:0;padding:12px 5vw}}@media (max-width:420px){.youten-hero-copy h1{letter-spacing:-.045em;font-size:clamp(42px,13vw,52px);line-height:1}}.youten-first-problem{border-bottom:2px solid var(--broadcast-black);color:var(--broadcast-black);background:#fffdf8;grid-template-columns:minmax(0,1.12fr) minmax(420px,.88fr);display:grid}.youten-first-problem>.breadcrumbs{color:#344153;background:#fff;border-bottom:1px solid #95a0ad;grid-column:1/-1;margin:0;padding:22px 4.5vw;font-size:12px}.youten-first-problem>.breadcrumbs a{align-items:center;min-height:44px;display:inline-flex}.youten-first-problem-main{background:linear-gradient(145deg,#fffdf8 0%,#f5fbff 100%);padding:clamp(36px,5vw,76px) 4.5vw 64px}.youten-problem-kicker{color:#39475a;align-items:center;gap:12px;margin:0 0 26px;font-size:14px;font-weight:900;display:flex}.youten-problem-kicker span{border:2px solid var(--broadcast-black);background:var(--pastel-yellow);color:var(--broadcast-black);letter-spacing:.08em;padding:8px 12px}.youten-first-problem h1{letter-spacing:-.04em;text-wrap:pretty;max-width:950px;margin:0;font-size:clamp(34px,4vw,64px);line-height:1.42}.youten-first-problem h1 small{color:#2b5ea8;letter-spacing:.18em;margin-bottom:18px;font-size:13px;line-height:1;display:block}.youten-first-problem-main>label{margin-top:38px;font-size:15px;font-weight:900;line-height:1.7;display:block}.youten-first-problem textarea{resize:vertical;border:2px solid var(--broadcast-black);width:100%;min-height:112px;color:var(--broadcast-black);font:inherit;box-shadow:8px 8px 0 var(--pastel-mint);background:#fff;border-radius:0;margin-top:12px;padding:18px;font-size:16px;line-height:1.7}.youten-first-problem textarea::placeholder{color:#657184;opacity:1}.youten-problem-source{color:#465365;margin:28px 0 0;font-size:13px;line-height:1.8}.youten-first-problem-thinking{border-left:2px solid var(--broadcast-black);background:var(--pastel-lavender);padding:clamp(36px,4vw,66px) clamp(24px,3vw,50px) 56px}.youten-first-problem-thinking>span{color:#31556a;letter-spacing:.12em;font-size:12px;font-weight:950}.youten-first-problem-thinking h2{letter-spacing:-.055em;margin:12px 0 24px;font-size:clamp(38px,4vw,62px);line-height:1}.youten-first-problem-thinking ol{border-top:2px solid var(--broadcast-black);margin:0 0 24px;padding:0;list-style:none}.youten-first-problem-thinking li{border-bottom:1px solid #7f8996;grid-template-columns:52px 1fr;align-items:start;gap:14px;min-height:84px;padding:16px 0;display:grid}.youten-first-problem-thinking li b{color:#496400;padding-top:4px;font-size:13px}.youten-first-problem-thinking li p{margin:0;font-size:17px;font-weight:750;line-height:1.7}.youten-first-problem-thinking li i{font-family:Georgia,Times New Roman,serif;font-size:1.15em}.youten-first-problem-thinking details{border:2px solid var(--broadcast-black);background:#fff;margin-top:12px}.youten-first-problem-thinking summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;min-height:58px;padding:14px 16px;font-size:15px;font-weight:950;display:flex}.youten-first-problem-thinking summary::-webkit-details-marker{display:none}.youten-first-problem-thinking details[open] summary b{transform:rotate(45deg)}.youten-first-problem-thinking details>div{background:#fffdf8;border-top:1px solid #8b95a2;padding:18px}.youten-first-problem-thinking details strong{margin-bottom:8px;font-size:18px;display:block}.youten-first-problem-thinking details p{margin:0;font-size:15px;line-height:1.85}.youten-first-problem-thinking .youten-problem-equation{background:var(--pastel-yellow);text-align:center;margin:16px 0;padding:14px;font-family:Georgia,Times New Roman,serif;font-size:22px}.youten-first-problem-links{grid-template-columns:1fr 1fr;gap:10px;margin-top:18px;display:grid}.youten-first-problem-links a{border:2px solid var(--broadcast-black);background:var(--pastel-mint);min-height:58px;color:var(--broadcast-black);text-align:center;justify-content:center;align-items:center;padding:12px 14px;font-size:13px;font-weight:950;display:flex}.youten-first-problem-links a:last-child{background:var(--pastel-yellow)}.youten-feature-intro{min-height:0}.youten-feature-intro .youten-feature-title{letter-spacing:-.055em;max-width:1020px;margin:0;font-size:clamp(72px,7.7vw,132px);line-height:.92}.youten-feature-intro .youten-feature-title>span{border:1px solid var(--broadcast-black);background:var(--broadcast-blue);max-width:max-content;color:var(--broadcast-black);letter-spacing:.04em;margin-bottom:20px;padding:9px 12px;font-size:clamp(14px,1.15vw,19px);line-height:1.2;display:block}.youten-feature-intro .youten-feature-title em{color:#2b5ea8;font-style:normal}.youten-problem-studio{border-bottom:2px solid var(--broadcast-black);color:var(--broadcast-black);background:#f8fbff;padding:78px 4.5vw 90px}.youten-problem-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.youten-problem-card{border:2px solid var(--broadcast-black);background:#fff;flex-direction:column;min-width:0;padding:28px;display:flex;box-shadow:9px 9px #dce8ef}.youten-problem-card:nth-child(3n+2){box-shadow-color:#f5dfb7;background:#fffaf3}.youten-problem-card:nth-child(3n){box-shadow-color:#f4dbe6;background:#fff8fb}.youten-problem-card>header{justify-content:space-between;align-items:center;gap:16px;font-size:12px;font-weight:950;display:flex}.youten-problem-card>header b{background:var(--pastel-mint);padding:7px 10px}.youten-problem-card h3{letter-spacing:-.05em;margin:34px 0 18px;font-size:clamp(30px,3vw,46px);line-height:1.1}.youten-problem-statement{border-left:7px solid var(--broadcast-black);background:#f3f1eb;padding:20px}.youten-problem-statement span,.youten-problem-think>span{color:#31556a;letter-spacing:.14em;font-size:11px;font-weight:950}.youten-problem-statement p{margin:10px 0 0;font-size:17px;font-weight:760;line-height:1.85}.youten-problem-think{background:var(--pastel-lavender);border:1px solid #8a95a3;margin:20px 0;padding:18px}.youten-problem-think ol{margin:12px 0 0;padding-left:24px}.youten-problem-think li{padding:5px 0 5px 4px;font-size:15px;line-height:1.7}.youten-problem-card details{border:2px solid var(--broadcast-black);background:#fff;margin-top:10px}.youten-problem-card summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;min-height:58px;padding:13px 15px;font-size:14px;font-weight:950;display:flex}.youten-problem-card summary::-webkit-details-marker{display:none}.youten-problem-card details[open] summary b{transform:rotate(45deg)}.youten-problem-card details>p,.youten-problem-card details>div{border-top:1px solid #929ca8;margin:0;padding:18px;font-size:15px;line-height:1.8}.youten-problem-card details>div p{margin:6px 0 16px}.youten-problem-card details>div p:last-child{margin-bottom:0}.youten-problem-card>a{border:2px solid var(--broadcast-black);background:var(--pastel-yellow);min-height:58px;color:var(--broadcast-black);justify-content:space-between;align-items:center;margin-top:18px;padding:12px 16px;font-size:14px;font-weight:950;display:flex}.youten-course-group>header>nav{grid-template-columns:1fr;gap:8px;display:grid}.youten-course-group>header>nav a{border:2px solid var(--broadcast-black);min-height:52px;color:var(--broadcast-black);text-align:center;background:#fff;justify-content:center;align-items:center;padding:10px 14px;font-size:12px;font-weight:950;display:inline-flex}.youten-course-group>header>nav a:last-child{background:var(--pastel-yellow)}.lesson-opening-problem{border-bottom:2px solid var(--ink);color:var(--ink);background:#fffdf8;grid-template-columns:minmax(0,1.08fr) minmax(400px,.92fr);display:grid}.lesson-opening-problem>.breadcrumbs{background:#fff;border-bottom:1px solid #929ba4;grid-column:1/-1;margin:0;padding:18px 5vw;font-size:11px}.lesson-opening-problem>.breadcrumbs a{align-items:center;min-height:44px;display:inline-flex}.lesson-opening-main{background:linear-gradient(145deg,#fffdf8,#f4fbff);padding:clamp(36px,5vw,72px) 5vw 58px}.lesson-opening-topic{color:#35576c;letter-spacing:.08em;margin:0 0 24px;font-size:12px;font-weight:950}.lesson-opening-main h1{letter-spacing:-.035em;text-wrap:pretty;margin:0;font-size:clamp(30px,3.7vw,56px);line-height:1.48}.lesson-opening-main h1 small{color:#496400;letter-spacing:.04em;margin-bottom:18px;font-size:14px;line-height:1.2;display:block}.lesson-opening-main h1>span{color:#2b5ea8;letter-spacing:.16em;margin-bottom:13px;font-size:12px;line-height:1;display:block}.lesson-opening-main>label{margin-top:34px;font-size:15px;font-weight:900;line-height:1.7;display:block}.lesson-opening-main textarea{resize:vertical;border:2px solid var(--ink);width:100%;min-height:112px;color:var(--ink);font:inherit;background:#fff;border-radius:0;margin-top:12px;padding:17px;font-size:16px;line-height:1.7;box-shadow:7px 7px #dff5e9}.lesson-opening-main textarea::placeholder{color:#647184;opacity:1}.lesson-opening-thinking{border-left:2px solid var(--ink);background:#eee7ff;padding:clamp(36px,4vw,64px) clamp(24px,3vw,46px) 52px}.lesson-opening-thinking>span{color:#31556a;letter-spacing:.13em;font-size:11px;font-weight:950}.lesson-opening-thinking h2{letter-spacing:-.055em;margin:11px 0 22px;font-size:clamp(38px,4vw,58px);line-height:1}.lesson-opening-thinking ol{border-top:2px solid var(--ink);margin:0 0 22px;padding:0;list-style:none}.lesson-opening-thinking li{border-bottom:1px solid #87919d;grid-template-columns:46px 1fr;gap:12px;min-height:78px;padding:15px 0;display:grid}.lesson-opening-thinking li>b{color:#496400;font-size:12px}.lesson-opening-thinking li p{margin:0;font-size:16px;line-height:1.7}.lesson-opening-thinking details{border:2px solid var(--ink);background:#fff;margin-top:10px}.lesson-opening-thinking summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;min-height:58px;padding:13px 15px;font-size:14px;font-weight:950;display:flex}.lesson-opening-thinking summary::-webkit-details-marker{display:none}.lesson-opening-thinking details[open] summary b{transform:rotate(45deg)}.lesson-opening-thinking details>div{background:#fffdf8;border-top:1px solid #8d97a2;padding:17px}.lesson-opening-thinking details strong{margin:4px 0 7px;font-size:16px;display:block}.lesson-opening-thinking details p{margin:0 0 13px;font-size:15px;line-height:1.8}.lesson-opening-thinking details p:last-child{margin-bottom:0}.lesson-opening-repeat{border-left:5px solid var(--ink);background:#f1f0e9;padding:14px}.lesson-opening-thinking>a{border:2px solid var(--ink);min-height:58px;color:var(--ink);text-align:center;background:#fff3bd;justify-content:center;align-items:center;margin-top:16px;padding:12px 15px;font-size:14px;font-weight:950;display:flex}.pattern-analysis-hero.lesson-analysis-intro{min-height:0}.pattern-analysis-hero.lesson-analysis-intro h2{letter-spacing:-.08em;overflow-wrap:anywhere;text-wrap:balance;max-width:850px;margin:24px 0;font-size:clamp(48px,6vw,86px);line-height:1.02}.youten-route-problem{border:2px solid var(--broadcast-black);background:#fff;margin:20px 0;padding:17px}.youten-route-problem>span{color:#31556a;letter-spacing:.12em;font-size:11px;font-weight:950}.youten-route-problem>p{margin:10px 0 14px;font-size:15px;font-weight:800;line-height:1.75}.youten-route-problem details{border-top:1px solid #8a95a2}.youten-route-problem summary{cursor:pointer;justify-content:space-between;align-items:center;min-height:52px;font-size:13px;font-weight:950;display:flex}.youten-route-problem summary::-webkit-details-marker{display:none}.youten-route-problem details[open] summary b{transform:rotate(45deg)}.youten-route-problem details p{background:var(--pastel-yellow);margin:0;padding:12px;font-size:13px;line-height:1.7}.formula-card>.formula-problem{border-left:6px solid var(--broadcast-black);background:#f1f0e9;margin:16px 0;padding:15px;display:block}.formula-card>.formula-problem>span{color:#31556a;letter-spacing:.12em;font-size:10px;font-weight:950}.formula-card>.formula-problem>p{color:var(--broadcast-black);margin:8px 0 0;font-size:15px;font-weight:800;line-height:1.75}.formula-card>details{border:2px solid var(--broadcast-black);background:#fff;margin-top:9px}.formula-card>details summary{cursor:pointer;justify-content:space-between;align-items:center;gap:10px;min-height:54px;padding:12px 14px;font-size:12px;font-weight:950;display:flex}.formula-card>details summary::-webkit-details-marker{display:none}.formula-card>details[open] summary b{transform:rotate(45deg)}.formula-card>details>div,.formula-card>details>p{border-top:1px solid #8b95a2;margin:0;padding:15px}.formula-card>details>div>strong{overflow-wrap:anywhere;font-family:Georgia,Times New Roman,serif;font-size:22px;line-height:1.55;display:block}.formula-card>details dl{margin:14px 0 0}.formula-card>details dl div{border-top:1px solid #d2d4cd;grid-template-columns:46px 1fr;gap:9px;padding:8px 0;display:grid}.formula-card>details dt{font-size:11px;font-weight:950}.formula-card>details dd{margin:0;font-size:13px;line-height:1.65}.formula-card>details>p{font-size:14px;line-height:1.75}.formula-card>a{border-top:2px solid var(--broadcast-black);min-height:56px;color:var(--broadcast-black);justify-content:space-between;align-items:center;margin-top:auto;padding:14px 2px 0;font-size:12px;font-weight:950;display:flex}.youten-unit-problem{border:2px solid var(--broadcast-black);background:#f8fbff;margin:22px 0 4px;padding:17px}.youten-unit-problem>span{color:#31556a;letter-spacing:.1em;font-size:10px;font-weight:950}.youten-unit-problem>p{white-space:pre-line;margin:10px 0 15px;font-size:15px;font-weight:800;line-height:1.75}.youten-unit-problem details{background:#fff;border:1px solid #7f8996;margin-top:8px}.youten-unit-problem summary{cursor:pointer;justify-content:space-between;align-items:center;gap:9px;min-height:52px;padding:11px 12px;font-size:12px;font-weight:950;display:flex}.youten-unit-problem summary::-webkit-details-marker{display:none}.youten-unit-problem details[open] summary b{transform:rotate(45deg)}.youten-unit-problem details>div,.youten-unit-problem details>ol{background:#fffdf8;border-top:1px solid #919ba7;margin:0;padding:14px 16px}.youten-unit-problem details>ol{padding-left:34px}.youten-unit-problem details li,.youten-unit-problem details p{margin:0 0 8px;font-size:13px;line-height:1.7}.youten-unit-problem details p:last-child{margin-bottom:0}.youten-unit-problem details strong{margin:6px 0;font-size:12px;display:block}.youten-unit-problem.compact{margin-bottom:18px;padding:14px}.youten-unit-problem.compact>p{margin-bottom:0;font-size:14px}.article-header>.brand{align-items:center;min-width:52px;min-height:52px}.breadcrumbs a{align-items:center;min-width:44px;min-height:44px;display:inline-flex}.unit-hub-hero .unit-hero-problem{background:#ffffffc7;align-self:start;padding:24px}.unit-hub-hero .unit-hero-problem>span{color:#31556a;letter-spacing:.11em;font-size:10px}.unit-hub-hero .unit-hero-problem .unit-hero-question{white-space:pre-line;margin:16px 0 18px;font-size:17px;font-weight:850;line-height:1.75}.unit-hero-problem details{border:1px solid var(--ink);background:#fff;margin-top:9px}.unit-hero-problem summary{cursor:pointer;justify-content:space-between;align-items:center;gap:10px;min-height:52px;padding:11px 13px;font-size:12px;font-weight:950;display:flex}.unit-hero-problem summary::-webkit-details-marker{display:none}.unit-hero-problem details[open] summary b{transform:rotate(45deg)}.unit-hero-problem details>div,.unit-hero-problem details>ol{background:#fffdf8;border-top:1px solid #8d97a2;margin:0;padding:14px 16px}.unit-hero-problem details>ol{padding-left:34px}.unit-hub-hero .unit-hero-problem details p,.unit-hero-problem details li{margin:0 0 8px;font-size:13px;line-height:1.7}.unit-hub-hero .unit-hero-problem details strong{margin:5px 0;font-size:12px;display:block}.unit-hub-hero .unit-hero-problem>a{align-items:center;min-height:52px;display:flex}@media (max-width:980px){.youten-first-problem{grid-template-columns:1fr}.youten-first-problem-thinking{border-top:2px solid var(--broadcast-black);border-left:0}.youten-problem-grid{grid-template-columns:1fr}.youten-feature-intro .youten-feature-title{font-size:clamp(64px,13.5vw,105px)}.youten-course-group>header>nav{grid-column:1/-1;grid-template-columns:1fr 1fr}.lesson-opening-problem{grid-template-columns:1fr}.lesson-opening-thinking{border-top:2px solid var(--ink);border-left:0}}@media (max-width:640px){.youten-first-problem>.breadcrumbs{white-space:nowrap;padding:12px 5vw;overflow-x:auto}.youten-first-problem-main{padding:30px 5vw 42px}.youten-first-problem h1{letter-spacing:-.035em;font-size:clamp(28px,8.3vw,38px);line-height:1.5}.youten-first-problem-main>label{margin-top:28px;font-size:14px}.youten-first-problem textarea{min-height:126px;box-shadow:5px 5px 0 var(--pastel-mint)}.youten-first-problem-thinking{padding:36px 5vw 44px}.youten-first-problem-thinking h2{font-size:42px}.youten-first-problem-thinking li{grid-template-columns:42px 1fr}.youten-first-problem-thinking li p{font-size:16px}.youten-first-problem-thinking summary{min-height:62px;font-size:14px}.youten-first-problem-links{grid-template-columns:1fr}.youten-problem-studio{padding:54px 5vw 64px}.youten-problem-card{padding:20px;box-shadow:6px 6px #dce8ef}.youten-problem-card h3{margin-top:28px;font-size:32px}.youten-problem-statement{padding:16px}.youten-problem-statement p{font-size:16px}.youten-problem-card summary{min-height:62px}.youten-feature-intro .youten-feature-title{letter-spacing:-.045em;font-size:clamp(42px,13vw,58px);line-height:1}.youten-course-group>header>nav{grid-template-columns:1fr}.lesson-opening-problem>.breadcrumbs{white-space:nowrap;padding:10px 5vw;overflow-x:auto}.lesson-opening-main{padding:30px 5vw 42px}.lesson-opening-main h1{font-size:clamp(27px,8vw,36px);line-height:1.52}.lesson-opening-main textarea{min-height:124px;box-shadow:5px 5px #dff5e9}.lesson-opening-thinking{padding:36px 5vw 44px}.lesson-opening-thinking h2{font-size:42px}.lesson-opening-thinking summary{min-height:62px}.pattern-analysis-hero.lesson-analysis-intro h2{font-size:43px}}.qf-page{--qf-ink:#17312d;--qf-green:#0f6b57;--qf-green-dark:#08493d;--qf-mint:#dff5e7;--qf-lime:#cbea70;--qf-cream:#fbf7ec;--qf-paper:#fffefa;--qf-blue:#dceef5;--qf-coral:#f4aa83;--qf-yellow:#f4de7f;--qf-muted:#5b706c;--qf-line:#17312d2e;min-height:100vh;color:var(--qf-ink);background:var(--qf-cream);overflow:clip}.qf-page *{box-sizing:border-box}.qf-page a{color:inherit}.qf-page section[id]{scroll-margin-top:86px}.qf-header{z-index:50;border-bottom:1px solid var(--qf-line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fbf7ecf0;justify-content:space-between;align-items:center;min-height:72px;padding:13px clamp(20px,5vw,72px);display:flex;position:sticky;top:0}.qf-header .brand{min-width:96px}.qf-header nav{align-items:center;gap:24px;font-size:12px;font-weight:850;display:flex}.qf-header nav a{align-items:center;min-height:44px;display:inline-flex}.qf-hero{background:radial-gradient(circle at 80% 18%,#67d2a247,#0000 31%),linear-gradient(135deg,#fbf7ec 65%,#eef7e7);padding:28px clamp(20px,5vw,72px) 76px}.qf-hero .breadcrumbs{max-width:1280px;margin:0 auto 52px}.qf-hero-grid{grid-template-columns:minmax(0,1.08fr) minmax(380px,.92fr);align-items:center;gap:clamp(42px,6vw,92px);max-width:1280px;margin:auto;display:grid}.qf-kicker,.qf-section-heading>span{color:var(--qf-green);letter-spacing:.16em;text-transform:uppercase;font-size:11px;font-weight:900}.qf-hero h1{letter-spacing:-.065em;max-width:820px;margin:15px 0 24px;font-size:clamp(54px,6.3vw,96px);line-height:.96}.qf-hero h1>span{margin-bottom:.12em;font-size:.68em;line-height:1.05;display:block}.qf-hero h1 em{color:var(--qf-green);font-style:normal}.qf-lead{max-width:690px;margin:0;font-size:clamp(16px,1.4vw,20px);line-height:1.95}.qf-hero-actions{flex-wrap:wrap;gap:12px;margin-top:30px;display:flex}.qf-hero-actions a{background:var(--qf-ink);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-height:50px;padding:0 21px;font-size:13px;font-weight:900;display:inline-flex}.qf-hero-actions a+a{border:1px solid var(--qf-ink);color:var(--qf-ink);background:0 0}.qf-hero-facts{border-top:1px solid var(--qf-line);grid-template-columns:repeat(3,1fr);max-width:500px;margin:34px 0 0;padding:18px 0 0;list-style:none;display:grid}.qf-hero-facts li{align-items:baseline;gap:9px;display:flex}.qf-hero-facts b{font-size:24px}.qf-hero-facts span{color:var(--qf-muted);font-size:11px;font-weight:800}.qf-formula-stage{background:#fff;border:1px solid #0f6b574d;border-radius:34px;padding:clamp(28px,4vw,54px);transform:rotate(1deg);box-shadow:0 26px 75px #17312d21}.qf-formula-stage>span:first-child{color:var(--qf-muted);text-align:center;font-size:13px;font-weight:750;display:block}.qf-formula-stage>.qf-formula{margin:34px auto}.qf-formula-stage>p{background:var(--qf-mint);border-radius:15px;margin:0;padding:15px 17px;font-size:13px;line-height:1.75}.qf-formula-labels{gap:8px;margin-top:18px;display:grid}.qf-formula-labels span{color:var(--qf-muted);grid-template-columns:48px 1fr;align-items:center;gap:9px;font-size:11px;display:grid}.qf-formula-labels b{border:1px solid var(--qf-line);background:var(--qf-cream);min-height:30px;color:var(--qf-ink);border-radius:9px;place-items:center;font-size:14px;display:grid}.qf-formula{white-space:nowrap;justify-content:center;align-items:center;font-family:Georgia,Times New Roman,serif;font-size:clamp(29px,3.4vw,50px);line-height:1.1;display:flex}.qf-formula.is-compact{font-size:clamp(25px,3vw,38px)}.qf-page .qf-frac{vertical-align:middle;text-align:center;flex-direction:column;line-height:1.15;display:inline-flex}.qf-page .qf-frac>span{padding:.12em .25em}.qf-page .qf-frac>span:first-child{border-bottom:.075em solid}.qf-page .qf-root{align-items:flex-start;margin-left:.06em;display:inline-flex}.qf-page .qf-root i{border:0;margin:-.02em -.02em 0 0;padding:0;font-size:1.06em;font-style:normal;line-height:1}.qf-page .qf-root b{border-top:.07em solid;padding:.02em .09em 0 .07em;font-weight:500;line-height:.92}.qf-numerator{justify-content:center;align-items:center;gap:.02em;display:inline-flex}.qf-level-route{border-top:1px solid var(--qf-ink);border-bottom:1px solid var(--qf-ink);background:#fff;grid-template-columns:repeat(5,1fr);margin:0;padding:0 clamp(20px,5vw,72px);list-style:none;display:grid}.qf-level-route li{border-right:1px solid var(--qf-line);grid-template-columns:34px 1fr;align-content:center;min-height:94px;padding:18px;display:grid}.qf-level-route li:first-child{border-left:1px solid var(--qf-line)}.qf-level-route b{color:var(--qf-green);grid-row:1/3;font-size:10px}.qf-level-route span{font-size:15px;font-weight:900}.qf-level-route p{color:var(--qf-muted);margin:3px 0 0;font-size:10px}.qf-shell{grid-template-columns:268px minmax(0,1fr);max-width:1440px;margin:auto;display:grid}.qf-sidebar{border-right:1px solid var(--qf-line);background:#f4f0e5;align-self:start;max-height:calc(100vh - 72px);position:sticky;top:72px;overflow:auto}.qf-sidebar>div{border-bottom:1px solid var(--qf-line);padding:28px 24px}.qf-sidebar>div span{color:var(--qf-green);letter-spacing:.15em;font-size:9px;font-weight:900;display:block}.qf-sidebar>div strong{margin-top:9px;font-size:25px;display:block}.qf-sidebar>div p{color:var(--qf-muted);margin:5px 0 0;font-size:11px}.qf-sidebar ol{margin:0;padding:0;list-style:none}.qf-sidebar li{border-bottom:1px solid var(--qf-line)}.qf-sidebar a{align-items:center;gap:13px;min-height:48px;padding:0 19px;font-size:11px;font-weight:800;display:flex}.qf-sidebar a:hover{background:var(--qf-mint)}.qf-sidebar a span{color:var(--qf-green);font-size:9px}.qf-article{background:var(--qf-paper);min-width:0}.qf-section{border-bottom:1px solid var(--qf-line);padding:clamp(68px,8vw,112px) clamp(24px,6vw,94px)}.qf-section:nth-child(2n){background:#fff}.qf-section-heading{text-align:center;max-width:790px;margin:0 auto 42px}.qf-section-heading.align-left{text-align:left;margin-left:0}.qf-section-heading h2{letter-spacing:-.055em;margin:10px 0 13px;font-size:clamp(37px,4.6vw,62px);line-height:1.06}.qf-section-heading p{max-width:760px;color:var(--qf-muted);margin:0;font-size:15px;line-height:1.9}.qf-answer-card{background:var(--qf-ink);color:#fff;border-radius:28px;grid-template-columns:minmax(300px,.9fr) minmax(340px,1.1fr);align-items:center;gap:44px;padding:clamp(28px,4vw,52px);display:grid}.qf-answer-card .qf-formula{color:var(--qf-lime)}.qf-answer-card ol{margin:0;padding:0;list-style:none}.qf-answer-card li{border-bottom:1px solid #46605b;grid-template-columns:32px 1fr;align-items:center;gap:10px;min-height:48px;padding:10px 0;font-size:13px;display:grid}.qf-answer-card li b{background:var(--qf-lime);width:26px;height:26px;color:var(--qf-ink);border-radius:50%;place-items:center;font-size:10px;display:grid}.qf-memory-card{border:1px solid var(--qf-ink);background:var(--qf-yellow);border-radius:22px;margin-top:18px;padding:24px}.qf-memory-card>span{letter-spacing:.12em;font-size:10px;font-weight:900}.qf-memory-card ol{grid-template-columns:repeat(3,1fr);gap:8px;margin:15px 0 12px;padding:0;list-style:none;display:grid}.qf-memory-card li{background:#ffffff8c;border-radius:12px;padding:13px;font-size:13px}.qf-memory-card li b{margin-bottom:5px;font-size:10px;display:block}.qf-memory-card p{margin:0;font-size:12px;line-height:1.7}.qf-kind-note{border-left:5px solid var(--qf-green);background:var(--qf-mint);grid-template-columns:190px 1fr;align-items:center;gap:22px;margin-top:18px;padding:21px 24px;display:grid}.qf-kind-note strong{font-size:14px}.qf-kind-note p{color:var(--qf-muted);margin:0;font-size:13px;line-height:1.75}.qf-coefficient-figure{border:1px solid var(--qf-ink);box-shadow:8px 8px 0 var(--qf-mint);background:#fff;border-radius:28px;margin:0;padding:clamp(25px,4vw,48px)}.qf-coefficient-equation{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;font-family:Georgia,Times New Roman,serif;font-size:clamp(34px,5vw,66px);display:flex}.qf-coefficient-equation i{font-style:normal}.qf-coefficient-equation span{border-radius:10px;padding:4px 8px}.qf-coefficient-equation .coef-a{background:var(--qf-mint)}.qf-coefficient-equation .coef-b{background:var(--qf-yellow)}.qf-coefficient-equation .coef-c{background:var(--qf-blue)}.qf-coefficient-figure dl{grid-template-columns:repeat(3,1fr);gap:12px;margin:38px 0 0;display:grid}.qf-coefficient-figure dl>div{border-radius:16px;grid-template-columns:38px 1fr;padding:18px;display:grid}.qf-coefficient-figure dl .coef-a{background:var(--qf-mint)}.qf-coefficient-figure dl .coef-b{background:var(--qf-yellow)}.qf-coefficient-figure dl .coef-c{background:var(--qf-blue)}.qf-coefficient-figure dt{grid-row:1/3;font-size:12px;font-weight:900}.qf-coefficient-figure dd{margin:0;font-size:28px;font-weight:900}.qf-coefficient-figure small{color:var(--qf-muted)}.qf-coefficient-figure figcaption{color:var(--qf-muted);text-align:center;margin-top:20px;font-size:12px;line-height:1.7}.qf-coefficient-cases{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px;display:grid}.qf-coefficient-cases article{border:1px solid var(--qf-line);background:var(--qf-cream);border-radius:18px;padding:20px}.qf-coefficient-cases span{color:var(--qf-green);font-size:10px;font-weight:900}.qf-coefficient-cases strong{margin:14px 0 8px;font-family:Georgia,serif;font-size:20px;display:block}.qf-coefficient-cases p{color:var(--qf-muted);margin:0;font-size:12px}.qf-worked-map{border:1px solid var(--qf-ink);background:#fff;grid-template-columns:repeat(5,1fr);display:grid}.qf-worked-map article{border-right:1px solid var(--qf-line);min-width:0;padding:19px}.qf-worked-map article:last-child{border-right:0}.qf-worked-map article>b{color:var(--qf-green);letter-spacing:.1em;font-size:9px}.qf-worked-map span{margin:10px 0 24px;font-size:12px;font-weight:900;display:block}.qf-worked-map strong{overflow-wrap:anywhere;min-height:67px;font-family:Georgia,serif;font-size:clamp(17px,1.6vw,23px);line-height:1.45;display:block}.qf-worked-map p{color:var(--qf-muted);margin:18px 0 0;font-size:11px;line-height:1.65}.qf-branch-figure{background:var(--qf-mint);border-radius:24px;margin:22px 0 0;padding:26px}.qf-branch-figure figcaption{margin-bottom:17px;font-size:12px;font-weight:900}.qf-branch-figure>div{grid-template-columns:.75fr 1.25fr;align-items:center;gap:22px;display:grid}.qf-branch-figure>div>span{border:1px solid var(--qf-green);text-align:center;background:#fff;border-radius:15px;padding:23px;line-height:1.7}.qf-branch-figure ol{grid-template-columns:1fr 1fr;gap:10px;margin:0;padding:0;list-style:none;display:grid}.qf-branch-figure li{background:#fff;border-radius:15px;padding:18px}.qf-branch-figure li b{color:var(--qf-green);font-size:10px;display:block}.qf-branch-figure li strong{margin-top:9px;font-family:Georgia,serif;font-size:18px;display:block}.qf-check-line{background:var(--qf-ink);color:#fff;border-radius:15px;align-items:center;gap:12px;margin-top:14px;padding:15px 20px;display:flex}.qf-check-line>span{background:var(--qf-lime);width:30px;height:30px;color:var(--qf-ink);border-radius:50%;flex:none;place-items:center;font-weight:900;display:grid}.qf-check-line p{margin:0;font-size:12px;line-height:1.7}.qf-calculator{background:var(--qf-ink);color:#fff;border-radius:28px;padding:clamp(24px,4vw,40px)}.qf-calculator-inputs{flex-wrap:wrap;justify-content:center;align-items:end;gap:10px;display:flex}.qf-calculator-inputs label{position:relative}.qf-calculator-inputs label span{color:var(--qf-green-dark);font-size:9px;font-weight:900;position:absolute;top:7px;left:10px}.qf-calculator-inputs input{width:105px;min-height:70px;color:var(--qf-ink);text-align:center;background:#fff;border:0;border-radius:13px;padding:17px 10px 5px;font-size:25px;font-weight:900}.qf-calculator-inputs>b{padding-bottom:18px;font-family:Georgia,serif;font-size:20px}.qf-calculator-result{grid-template-columns:.65fr 1.35fr;gap:10px;margin-top:28px;display:grid}.qf-calculator-result>div{border:1px solid #49625d;border-radius:17px;flex-direction:column;justify-content:center;min-height:122px;padding:20px;display:flex}.qf-calculator-result span{color:var(--qf-lime);font-size:10px;font-weight:900}.qf-calculator-result strong{margin:9px 0;font-size:clamp(21px,3vw,32px);display:block}.qf-calculator-result small{color:#b9c7c4;line-height:1.55}.qf-calc-error{background:#6f382b;border-radius:15px;grid-column:1/-1;margin:0;padding:20px}.qf-calculator-note{color:#b9c7c4;text-align:center;margin:14px 0 0;font-size:10px}.qf-choice-flow{grid-template-columns:repeat(5,1fr);margin:0;padding:0;list-style:none;display:grid}.qf-choice-flow li{border:1px solid var(--qf-line);background:#fff;border-right:0;min-height:164px;padding:19px;position:relative}.qf-choice-flow li:last-child{border-right:1px solid var(--qf-line);background:var(--qf-mint)}.qf-choice-flow li>b{background:var(--qf-green);color:#fff;border-radius:50%;place-items:center;width:25px;height:25px;font-size:9px;display:grid}.qf-choice-flow span{margin-top:17px;font-size:13px;font-weight:900;display:block}.qf-choice-flow p{color:var(--qf-muted);margin:9px 0 0;font-size:11px;line-height:1.55}.qf-method-compare{grid-template-columns:1fr 1fr;gap:14px;margin-top:22px;display:grid}.qf-method-compare article{border:1px solid var(--qf-line);background:#fff;border-radius:20px;padding:25px}.qf-method-compare article.is-fast{border-color:var(--qf-green);box-shadow:inset 0 6px var(--qf-lime)}.qf-method-compare article>span{color:var(--qf-green);font-size:10px;font-weight:900}.qf-method-compare h3{margin:17px 0;font-family:Georgia,serif;font-size:28px}.qf-method-compare ol{min-height:104px;color:var(--qf-muted);margin:0 0 15px;padding-left:20px;font-size:12px;line-height:1.8}.qf-method-compare article>strong{font-size:13px}.qf-switch-rule{border-left:5px solid var(--qf-coral);background:#fff0e7;margin-top:14px;padding:20px 23px}.qf-switch-rule b{font-size:13px}.qf-switch-rule p{color:var(--qf-muted);margin:7px 0 0;font-size:12px;line-height:1.7}.qf-example-grid{grid-template-columns:1fr 1fr;gap:14px;display:grid}.qf-example-grid>article{border:1px solid var(--qf-line);background:#fff;border-radius:22px;padding:26px}.qf-example-grid>article>span{background:var(--qf-mint);color:var(--qf-green-dark);border-radius:999px;padding:5px 9px;font-size:9px;font-weight:900;display:inline-flex}.qf-example-grid h3{margin:16px 0 8px;font-size:20px}.qf-example-equation{margin:24px 0;font-family:Georgia,serif;font-size:26px;display:block}.qf-example-grid details{border-top:1px solid var(--qf-line)}.qf-example-grid summary{cursor:pointer;align-items:center;min-height:52px;font-size:11px;font-weight:900;display:flex}.qf-example-grid details ol{margin:0;padding:0;list-style:none}.qf-example-grid details li{border-bottom:1px solid var(--qf-line);grid-template-columns:26px 1fr;gap:8px;padding:10px 0;font-size:12px;line-height:1.55;display:grid}.qf-example-grid details li b{color:var(--qf-green)}.qf-example-grid details p{color:var(--qf-muted);font-size:11px;line-height:1.65}.qf-example-grid .qf-example-answer{background:var(--qf-mint);color:var(--qf-ink);border-radius:10px;padding:12px;font-weight:900}.qf-radical-ladder{border:1px solid var(--qf-ink);background:var(--qf-yellow);border-radius:22px;margin-top:18px;padding:26px}.qf-radical-ladder>span{letter-spacing:.14em;font-size:9px;font-weight:900}.qf-radical-ladder h3{margin:10px 0 22px;font-size:20px}.qf-radical-ladder ol{grid-template-columns:repeat(3,1fr);gap:10px;margin:0;padding:0;list-style:none;display:grid}.qf-radical-ladder li{text-align:center;background:#ffffffb3;border-radius:13px;padding:16px;position:relative}.qf-radical-ladder li:not(:last-child):after{content:"→";z-index:2;font-weight:900;position:absolute;top:33%;right:-17px}.qf-radical-ladder li b{font-family:Georgia,serif;font-size:25px;display:block}.qf-radical-ladder small{color:var(--qf-muted);margin-top:6px;display:block}.qf-proofs-section{background:#eff7ef!important}.qf-honesty-note{border:1px solid var(--qf-green);color:var(--qf-muted);background:#fff;border-radius:16px;margin:-14px 0 28px;padding:18px 21px;font-size:12px;line-height:1.75}.qf-honesty-note b{color:var(--qf-ink)}.qf-area-proof{background:var(--qf-ink);color:#fff;border-radius:26px;grid-template-columns:minmax(230px,.75fr) minmax(300px,1.25fr);align-items:center;gap:35px;margin:0 0 28px;padding:clamp(22px,4vw,38px);display:grid}.qf-area-board{aspect-ratio:1;border:3px solid #fff;grid-template-rows:3fr 1fr;grid-template-columns:3fr 1fr;width:min(100%,330px);display:grid}.qf-area-board>div{border:1px solid #ffffffb3;place-items:center;font-family:Georgia,serif;font-weight:800;display:grid}.area-x{background:#17745f;font-size:30px}.area-px-one,.area-px-two{color:var(--qf-ink);background:#b2d65b;font-size:12px}.area-corner{background:var(--qf-yellow);color:var(--qf-ink);text-align:center;font-size:10px}.qf-area-proof figcaption>span{color:var(--qf-lime);letter-spacing:.13em;font-size:9px;font-weight:900}.qf-area-proof figcaption strong{margin:12px 0;font-size:clamp(23px,3vw,38px);line-height:1.15;display:block}.qf-area-proof figcaption p{color:#c7d3d0;margin:0;font-size:13px;line-height:1.8}.qf-proof-list{border-top:1px solid var(--qf-ink)}.qf-proof-list details{border-bottom:1px solid var(--qf-ink);background:#ffffffa6}.qf-proof-list summary{cursor:pointer;grid-template-columns:48px 1fr 32px;align-items:center;gap:16px;min-height:108px;padding:19px 18px;list-style:none;display:grid}.qf-proof-list summary::-webkit-details-marker{display:none}.qf-proof-list summary>span{color:var(--qf-green);font:900 11px/1 monospace}.qf-proof-list summary small{color:var(--qf-green);letter-spacing:.08em;font-size:9px;font-weight:900}.qf-proof-list summary strong{margin:7px 0 4px;font-size:20px;display:block}.qf-proof-list summary p{color:var(--qf-muted);margin:0;font-size:11px;line-height:1.55}.qf-proof-list summary>b{border:1px solid var(--qf-ink);border-radius:50%;place-items:center;width:30px;height:30px;display:grid}.qf-proof-list details[open] summary>b{transform:rotate(45deg)}.qf-proof-body{padding:0 18px 24px 82px}.qf-proof-body ol{margin:0;padding:0;list-style:none}.qf-proof-body li{border-top:1px solid var(--qf-line);grid-template-columns:30px 1fr;gap:10px;padding:11px 0;display:grid}.qf-proof-body li>span{background:var(--qf-mint);width:24px;height:24px;color:var(--qf-green-dark);border-radius:50%;place-items:center;font-size:9px;font-weight:900;display:grid}.qf-proof-body li p{margin:0;font-family:Georgia,Times New Roman,serif;font-size:15px;line-height:1.7}.qf-proof-caution{border-left:4px solid var(--qf-coral);color:var(--qf-muted);background:#fff0e7;margin:14px 0 0;padding:14px 16px;font-size:11px;line-height:1.65}.qf-proof-caution b{color:var(--qf-ink);margin-bottom:4px;display:block}.qf-signal{margin:0}.qf-signal figcaption{margin-bottom:13px;font-size:11px;font-weight:900}.qf-signal ul{grid-template-columns:repeat(3,1fr);gap:12px;margin:0;padding:0;list-style:none;display:grid}.qf-signal li{border:1px solid var(--qf-line);background:#fff;border-radius:20px;flex-direction:column;min-height:210px;padding:23px;display:flex}.qf-signal li>i{background:var(--qf-green);width:34px;height:34px;box-shadow:0 0 0 7px var(--qf-mint);border-radius:50%}.qf-signal li.one>i{background:#d1a500;box-shadow:0 0 0 7px #fff4bd}.qf-signal li.zero>i{background:#74827f;box-shadow:0 0 0 7px #e6eae9}.qf-signal li>b{color:var(--qf-green);margin-top:28px;font-family:Georgia,serif;font-size:21px}.qf-signal li>strong{margin-top:7px;font-size:14px}.qf-signal li p{color:var(--qf-muted);margin:7px 0 0;font-size:11px;line-height:1.55}.qf-parabola-panels{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px;display:grid}.qf-parabola-panels article{background:var(--qf-blue);border-radius:17px;padding:13px}.qf-parabola{background-color:#fff;background-image:linear-gradient(#17312d0f 1px,#0000 1px),linear-gradient(90deg,#17312d0f 1px,#0000 1px);background-size:20px 20px;border:1px solid #17312d26;border-radius:12px;height:150px;position:relative;overflow:hidden}.qf-parabola:before{content:"";border-top:2px solid var(--qf-ink);position:absolute;top:60%;left:0;right:0}.qf-parabola:after{content:"";border-left:2px solid var(--qf-ink);position:absolute;top:0;bottom:0;left:50%}.qf-parabola>i{z-index:2;border:4px solid var(--qf-green);border-top:0;border-radius:0 0 50px 50px;width:100px;height:92px;position:absolute;left:50%;transform:translate(-50%)}.qf-parabola.crosses>i{top:30px}.qf-parabola.touches>i{top:-2px}.qf-parabola.misses>i{top:-24px}.qf-parabola span{z-index:3;font-size:9px;font-weight:900;position:absolute;top:calc(60% + 5px)}.qf-parabola .root-one{left:27%}.qf-parabola .root-two{right:27%}.qf-parabola.touches .root-one{left:calc(50% + 7px)}.qf-parabola-panels article>p{text-align:center;margin:10px 0 0;font-size:11px;font-weight:900}.qf-even-formula{background:var(--qf-yellow);border-radius:22px;grid-template-columns:1.2fr .8fr;align-items:center;gap:24px;margin-top:18px;padding:27px;display:grid}.qf-even-formula>div>span{letter-spacing:.14em;font-size:9px;font-weight:900}.qf-even-formula h3{margin:10px 0;font-size:23px}.qf-even-formula p{color:var(--qf-muted);margin:0;font-size:12px;line-height:1.65}.qf-even-formula>strong{text-align:center;white-space:nowrap;font:28px/1.1 Georgia,serif}.qf-advanced-section{color:#fff;background:var(--qf-ink)!important}.qf-advanced-section .qf-section-heading>span{color:var(--qf-lime)}.qf-advanced-section .qf-section-heading p{color:#bccac7}.qf-advanced-grid{grid-template-columns:1fr 1fr;gap:14px;display:grid}.qf-advanced-grid>article{background:#203d38;border:1px solid #4b625e;border-radius:22px;padding:27px}.qf-advanced-grid>article>span{background:var(--qf-lime);color:var(--qf-ink);border-radius:999px;padding:5px 9px;font-size:9px;font-weight:900;display:inline-flex}.qf-advanced-grid h3{margin:15px 0 10px;font-size:22px}.qf-advanced-problem{color:#d3ddda;min-height:70px;margin:0 0 18px;font-size:13px;line-height:1.75}.qf-advanced-grid ol{margin:0;padding:0;list-style:none}.qf-advanced-grid li{border-top:1px solid #49615c;grid-template-columns:28px 1fr;gap:9px;padding:10px 0;display:grid}.qf-advanced-grid li b{background:var(--qf-lime);width:23px;height:23px;color:var(--qf-ink);border-radius:50%;place-items:center;font-size:9px;display:grid}.qf-advanced-grid li p{margin:0;font-family:Georgia,Times New Roman,serif;font-size:14px;line-height:1.6}.qf-advanced-answer{color:var(--qf-ink);background:#fff;border-radius:12px;margin-top:17px;padding:14px;font-size:12px;line-height:1.65;display:block}.qf-practice-list{border-top:1px solid var(--qf-ink)}.qf-practice-list>article{border-bottom:1px solid var(--qf-ink);grid-template-columns:110px 1fr minmax(190px,.7fr);align-items:center;gap:18px;padding:18px 0;display:grid}.qf-practice-list>article>div{align-items:center;gap:8px;display:flex}.qf-practice-list>article>div span{background:var(--qf-green);color:#fff;border-radius:50%;place-items:center;width:34px;height:34px;font-size:9px;font-weight:900;display:grid}.qf-practice-list>article>div b{font-size:9px}.qf-practice-list>article>p{margin:0;font-family:Georgia,serif;font-size:18px}.qf-practice-list details{border:1px solid var(--qf-line);background:#fff;border-radius:12px}.qf-practice-list summary{cursor:pointer;align-items:center;min-height:46px;padding:0 13px;font-size:10px;font-weight:900;display:flex}.qf-practice-list details strong,.qf-practice-list details p{margin:0;padding:0 13px 12px;font-size:11px;line-height:1.6;display:block}.qf-practice-list details p{color:var(--qf-muted)}.qf-sign-warning{background:#fff0e7;border:1px solid #9a442f;border-radius:22px;padding:25px}.qf-sign-warning>span{color:#9a442f;font-size:10px;font-weight:900}.qf-sign-warning>div{align-items:center;gap:28px;margin:19px 0 12px;font-family:Georgia,serif;font-size:clamp(23px,3vw,36px);display:flex}.qf-sign-warning>div i{color:#9a442f;font-style:normal}.qf-sign-warning p{color:var(--qf-muted);margin:0;font-size:12px}.qf-fraction-compare{grid-template-columns:1fr 1fr;gap:14px;margin-top:15px;display:grid}.qf-fraction-compare article{border:1px solid var(--qf-line);background:#fff;border-radius:20px;flex-direction:column;justify-content:space-between;min-height:210px;padding:23px;display:flex}.qf-fraction-compare article.correct{box-shadow:inset 0 6px var(--qf-lime)}.qf-fraction-compare article.wrong{box-shadow:inset 0 6px var(--qf-coral)}.qf-fraction-compare article>span{font-size:9px;font-weight:900}.qf-fraction-compare .wrong>strong{text-align:center;font:clamp(20px,3vw,32px)/1.3 Georgia,serif}.qf-fraction-compare p{color:var(--qf-muted);text-align:center;margin:0;font-size:11px}.qf-mistake-grid{grid-template-columns:repeat(3,1fr);gap:10px;margin-top:15px;display:grid}.qf-mistake-grid article{background:var(--qf-cream);border-radius:17px;padding:20px}.qf-mistake-grid article>span{color:var(--qf-green);font:900 9px/1 monospace}.qf-mistake-grid h3{margin:18px 0 7px;font-size:16px}.qf-mistake-grid p{color:var(--qf-muted);margin:0;font-size:11px;line-height:1.65}.qf-faq-list{border-top:1px solid var(--qf-ink)}.qf-faq-list details{border-bottom:1px solid var(--qf-ink)}.qf-faq-list summary{cursor:pointer;justify-content:space-between;align-items:center;gap:20px;min-height:70px;padding:0 7px;font-size:14px;font-weight:900;list-style:none;display:flex}.qf-faq-list summary::-webkit-details-marker{display:none}.qf-faq-list summary b{border:1px solid var(--qf-line);border-radius:50%;flex:none;place-items:center;width:30px;height:30px;display:grid}.qf-faq-list details[open] summary b{transform:rotate(45deg)}.qf-faq-list details p{color:var(--qf-muted);margin:0;padding:0 48px 21px 7px;font-size:13px;line-height:1.85}.qf-editorial{border:1px solid var(--qf-ink);background:var(--qf-cream);border-radius:23px;grid-template-columns:repeat(3,1fr);gap:14px;padding:28px;display:grid}.qf-editorial>div:not(.qf-source-links){border-bottom:1px solid var(--qf-line);padding-bottom:15px}.qf-editorial>div span{color:var(--qf-green);font-size:9px;font-weight:900;display:block}.qf-editorial>div strong{margin-top:7px;font-size:13px;display:block}.qf-editorial>p{color:var(--qf-muted);grid-column:1/-1;margin:0;font-size:12px;line-height:1.85}.qf-source-links{flex-wrap:wrap;grid-column:1/-1;gap:10px;display:flex}.qf-source-links a{border:1px solid var(--qf-line);background:#fff;border-radius:999px;padding:10px 13px;font-size:10px;font-weight:900}.qf-related{grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px;display:grid}.qf-related a{border:1px solid var(--qf-line);background:#fff;border-radius:18px;flex-direction:column;min-height:150px;padding:20px;display:flex}.qf-related span{color:var(--qf-green);font-size:9px;font-weight:900}.qf-related strong{margin-top:18px;font-size:17px}.qf-related small{color:var(--qf-muted);margin-top:auto;padding-top:18px}.qf-final-cta{background:var(--qf-green-dark);color:#fff;border-radius:27px;margin-top:20px;padding:clamp(30px,5vw,58px)}.qf-final-cta>span{color:var(--qf-lime);letter-spacing:.15em;font-size:9px;font-weight:900}.qf-final-cta h2{letter-spacing:-.05em;margin:17px 0;font-size:clamp(34px,4.5vw,58px);line-height:1.08}.qf-final-cta p{color:#c9d9d5;font-size:13px}.qf-final-cta a{background:var(--qf-lime);min-height:48px;color:var(--qf-ink);border-radius:999px;align-items:center;margin-top:13px;padding:0 18px;font-size:11px;font-weight:900;display:inline-flex}@media (max-width:1100px){.qf-shell{grid-template-columns:1fr}.qf-sidebar{display:none}.qf-worked-map{grid-template-columns:1fr 1fr}.qf-worked-map article{border-bottom:1px solid var(--qf-line)}.qf-worked-map article:nth-child(2n){border-right:0}.qf-worked-map article:last-child{grid-column:1/-1}.qf-choice-flow{grid-template-columns:1fr 1fr}.qf-choice-flow li{border-right:1px solid var(--qf-line);border-bottom:0}.qf-choice-flow li:last-child{border-bottom:1px solid var(--qf-line);grid-column:1/-1}}@media (max-width:820px){.qf-header nav a:first-child{display:none}.qf-hero-grid{grid-template-columns:1fr}.qf-formula-stage{transform:none}.qf-level-route{grid-template-columns:repeat(5,minmax(150px,1fr));padding:0;overflow-x:auto}.qf-answer-card,.qf-area-proof{grid-template-columns:1fr}.qf-answer-card .qf-formula{min-height:120px}.qf-kind-note{grid-template-columns:1fr;gap:7px}.qf-coefficient-cases,.qf-signal ul,.qf-parabola-panels,.qf-mistake-grid,.qf-related,.qf-branch-figure>div,.qf-even-formula,.qf-example-grid,.qf-advanced-grid,.qf-fraction-compare{grid-template-columns:1fr}.qf-practice-list>article{grid-template-columns:90px 1fr}.qf-practice-list details{grid-column:1/-1}}@media (max-width:560px){.qf-header{padding-inline:5vw}.qf-header nav a:not(:last-child){display:none}.qf-hero{padding-inline:5vw;padding-bottom:52px}.qf-hero .breadcrumbs{white-space:nowrap;margin-bottom:38px;overflow-x:auto}.qf-hero h1{font-size:clamp(43px,12.2vw,62px)}.qf-lead{font-size:15px}.qf-hero-actions{display:grid}.qf-hero-actions a{width:100%}.qf-hero-facts{grid-template-columns:1fr 1fr 1fr}.qf-hero-facts li{gap:2px;display:grid}.qf-formula-stage{border-radius:24px;padding:28px 18px}.qf-formula{font-size:clamp(27px,8vw,38px)}.qf-formula-labels span{grid-template-columns:43px 1fr}.qf-section{padding:62px 5vw}.qf-section-heading{margin-bottom:31px}.qf-section-heading h2{font-size:clamp(34px,10.3vw,47px)}.qf-answer-card{border-radius:20px;padding:24px 16px}.qf-memory-card ol{grid-template-columns:1fr}.qf-coefficient-figure{box-shadow:5px 5px 0 var(--qf-mint);padding:25px 14px}.qf-coefficient-figure dl{grid-template-columns:1fr}.qf-coefficient-equation{font-size:34px}.qf-worked-map,.qf-choice-flow{grid-template-columns:1fr}.qf-worked-map article,.qf-worked-map article:nth-child(2n){border-right:0}.qf-worked-map article:last-child,.qf-choice-flow li:last-child{grid-column:1}.qf-branch-figure{padding:19px 14px}.qf-branch-figure ol{grid-template-columns:1fr}.qf-calculator{padding:23px 14px}.qf-calculator-inputs{gap:6px}.qf-calculator-inputs input{width:74px;min-height:62px}.qf-calculator-inputs>b{padding-bottom:17px;font-size:15px}.qf-calculator-result,.qf-radical-ladder ol{grid-template-columns:1fr}.qf-radical-ladder li:not(:last-child):after{content:"↓";inset:auto auto -17px 50%}.qf-area-board{margin:auto}.qf-proof-list summary{grid-template-columns:38px 1fr 28px;padding-inline:8px}.qf-proof-list summary p{display:none}.qf-proof-body{padding:0 8px 20px 47px}.qf-proof-body li p{font-size:14px}.qf-even-formula>strong{font-size:22px}.qf-sign-warning>div{flex-wrap:wrap;gap:12px}.qf-sign-warning>div i{transform:rotate(90deg)}.qf-editorial{grid-template-columns:1fr}.qf-editorial>p,.qf-source-links{grid-column:1}.qf-source-links{display:grid}.qf-practice-list>article{grid-template-columns:1fr}.qf-practice-list details{grid-column:1}}@media print{.qf-header,.qf-sidebar,.qf-hero-actions,.qf-calculator-section{display:none!important}.qf-shell{display:block}.qf-section{break-inside:avoid;padding:28px 0}.qf-page,.qf-section,.qf-proofs-section,.qf-advanced-section{color:#000!important;background:#fff!important}.qf-proof-list details>div{display:block}.qf-area-proof,.qf-answer-card{color:#000;background:#fff;border:1px solid #000}}