:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--paper:#f3f0e8;--paper-deep:#e9e4d8;--surface:#faf8f2;--surface-soft:#ffffff6b;--ink:#17233c;--muted:#667083;--line:#d5cfc3;--blue:#3d69a8;--blue-dark:#2d507e;--success:#3f6e50;--success-bg:#e9f1e9;--danger:#a04e3a;--danger-bg:#f5e9e5;--pitfall-bg:#eee0d5;--pitfall-line:#c99e83;--focus:#e6a72d;--subject:var(--blue);--serif:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--sans:"Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--paper:#111720;--paper-deep:#0d131c;--surface:#18212d;--surface-soft:#ffffff09;--ink:#e9edf3;--muted:#9ca8b7;--line:#303a48;--blue:#7fa4db;--blue-dark:#648ac2;--success:#8eb99a;--success-bg:#182a22;--danger:#d98c77;--danger-bg:#32211f;--pitfall-bg:#2b2422;--pitfall-line:#765c50;--focus:#f0bd55}:root[data-theme=pink]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--paper:#f8eef1;--paper-deep:#ead9df;--surface:#fff8fa;--surface-soft:#ffffff80;--ink:#3a2430;--muted:#7a5d6a;--line:#dbc6cf;--blue:#a55273;--blue-dark:#813d59;--success:#587760;--success-bg:#edf3ed;--danger:#a04e5d;--danger-bg:#f7e8eb;--pitfall-bg:#f2e2e7;--pitfall-line:#cfa6b5;--focus:#a55273}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:radial-gradient(circle at 15% 0%, color-mix(in srgb, var(--blue) 7%, transparent), transparent 28rem), var(--paper);font-family:var(--sans);margin:0;font-size:16px;line-height:1.55;transition:background-color .25s,color .25s}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}button:focus-visible,a:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip-link{z-index:100;background:var(--ink);color:var(--paper);padding:10px 14px;position:fixed;top:8px;left:8px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.site-shell{min-height:100dvh}.app-header{border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--paper) 93%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);z-index:20;grid-template-columns:1fr auto 1fr;align-items:center;height:72px;padding:0 clamp(20px,5vw,72px);display:grid;position:sticky;top:0}.wordmark{justify-self:start;align-items:center;display:inline-flex}.brand-logo-frame{width:66px;height:56px;display:block;overflow:hidden}.brand-logo-image{object-fit:contain;width:100%;height:100%;display:block}:root[data-theme=dark] .brand-logo-image{filter:brightness(0)invert(.94)}.app-header nav{gap:34px;font-size:13px;font-weight:650;display:flex}.app-header nav a{padding:26px 0 23px;position:relative}.app-header nav a:hover:after{content:"";background:var(--ink);height:2px;position:absolute;bottom:-1px;left:0;right:0}.header-tools{justify-self:end;gap:10px;display:flex}.theme-toggle,.avatar{border:1px solid var(--line);background:0 0;place-items:center;min-height:44px;display:grid}.theme-toggle{cursor:pointer;width:auto;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;border-radius:2px;grid-template-columns:14px auto;gap:9px;padding:0 13px;font-size:10px;font-weight:750;transition:transform .2s,background .2s}.theme-toggle:hover{background:var(--surface-soft)}.theme-toggle:active{transform:scale(.98)}.theme-swatch{border:1px solid var(--line);border-radius:50%;width:12px;height:12px;display:block}.theme-swatch.light{background:#f3f0e8}.theme-swatch.dark{background:#17202c}.theme-swatch.pink{background:#d990aa}.avatar{background:var(--ink);width:44px;color:var(--paper);border-color:var(--ink);letter-spacing:.08em;border-radius:50%;font-size:10px;font-weight:750}.dashboard,.course-page,.notes-page{width:min(1180px,100% - 48px);margin:0 auto}.dashboard{padding:68px 0 90px}.welcome{border-bottom:1px solid var(--line);justify-content:space-between;align-items:end;gap:36px;padding-bottom:52px;display:flex}.eyebrow,.section-number{color:var(--muted);letter-spacing:.15em;text-transform:uppercase;margin:0 0 9px;font-size:10px;font-weight:800}h1,h2,h3,p{margin-top:0}h1,h2,.note-article blockquote{font-family:var(--serif);letter-spacing:-.025em;text-wrap:balance;font-weight:500}.welcome h1{max-width:720px;margin-bottom:12px;font-size:clamp(42px,5vw,67px);line-height:.98}.lede{color:var(--muted);margin:0;font-size:17px}.week-meter{flex:none;width:240px}.meter-copy,.sidebar-stat{color:var(--muted);justify-content:space-between;align-items:baseline;margin-bottom:10px;font-size:12px;display:flex}.meter-copy strong{color:var(--ink);font-variant-numeric:tabular-nums;font-size:16px}.meter-copy small{color:var(--muted);font-weight:500}.meter-track{background:var(--line);width:100%;height:4px;overflow:hidden}.meter-track span{background:var(--subject);height:100%;display:block}.dashboard>section{margin-top:56px}.section-heading{justify-content:space-between;align-items:end;gap:24px;margin-bottom:20px;display:flex}.section-heading h2{margin:0;font-size:29px;line-height:1.1}.section-heading.compact{align-items:center}.section-heading.compact h2{font-size:24px}.quiet-meta{color:var(--muted);font-size:12px}.text-button{cursor:pointer;background:0 0;border:0;border-bottom:1px solid;padding:3px 0;font-size:12px}.continue-panel{border:1px solid var(--line);background:var(--surface);min-height:172px;box-shadow:0 18px 50px color-mix(in srgb, var(--paper-deep) 45%, transparent);grid-template-columns:58px 1fr auto;align-items:center;display:grid;overflow:hidden}.continue-spine{background:var(--blue);color:#fff;letter-spacing:.16em;writing-mode:vertical-rl;align-self:stretch;place-items:center;font-size:9px;font-weight:800;display:grid;transform:rotate(180deg)}.continue-main{padding:29px 34px}.context-line{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;gap:0;font-size:10px;font-weight:750;display:flex}.context-line span+span:before{content:"·";color:var(--muted);opacity:.7;padding:0 8px}.continue-main h3{font-family:var(--serif);margin:8px 0 0;font-size:30px;font-weight:500}.continue-main>p{color:var(--muted);margin:0 0 17px;font-size:14px}.topic-progress{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;align-items:center;gap:12px;font-size:10px;display:flex}.progress-dots{gap:4px;display:flex}.progress-dots i{background:var(--line);width:20px;height:3px}.progress-dots i.done{background:var(--blue)}.button{border:1px solid var(--ink);letter-spacing:.03em;cursor:pointer;background:0 0;justify-content:center;align-items:center;gap:22px;min-height:46px;padding:0 22px;font-size:12px;font-weight:750;transition:transform .18s,background .18s,border-color .18s;display:inline-flex}.button.primary{background:var(--ink);color:var(--paper)}.button.primary:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff;transform:translateY(-1px)}.button:active{transform:scale(.98)}.button:disabled{opacity:.4;cursor:not-allowed;transform:none}.continue-panel>.button{margin-right:34px}.course-grid{border-top:1px solid var(--line)}.course-row{border-bottom:1px solid var(--line);grid-template-columns:72px 1fr auto 24px;align-items:center;gap:22px;min-height:124px;padding:20px 8px;transition:background .18s,padding .18s;display:grid}.course-row:hover{background:var(--surface-soft);padding-left:15px;padding-right:15px}.subject-mark{border:1px solid var(--subject);width:58px;height:72px;color:var(--subject);flex-direction:column;justify-content:center;align-items:center;display:flex}.subject-mark>span{font-family:var(--serif);font-size:31px;line-height:1}.subject-mark small{letter-spacing:.13em;margin-top:7px;font-size:7px;font-weight:800}.course-copy h3{font-family:var(--serif);margin:4px 0 1px;font-size:24px;font-weight:500}.course-copy p{color:var(--muted);margin:0;font-size:12px}.course-stat{border-right:1px solid var(--line);flex-direction:column;align-items:end;min-width:80px;padding-right:22px;display:flex}.course-stat strong{font-family:var(--serif);font-variant-numeric:tabular-nums;font-size:22px;font-weight:500}.course-stat span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:9px}.row-arrow{color:var(--subject);font-size:20px}.lower-grid{grid-template-columns:1.35fr .65fr;gap:62px;display:grid}.review-list{border-top:1px solid var(--line)}.review-list a{border-bottom:1px solid var(--line);grid-template-columns:57px 1fr auto;align-items:center;gap:18px;min-height:78px;display:grid}.review-list a:hover strong{color:var(--blue)}.review-list a>span:nth-child(2){flex-direction:column;display:flex}.review-list strong{font-family:var(--serif);font-weight:500}.review-list small{color:var(--muted)}.review-date{color:var(--blue);letter-spacing:.1em;font-size:9px;font-weight:800}.review-date.later{color:var(--muted)}.study-note{border-left:3px solid var(--ink);align-self:start;padding:7px 0 7px 28px}.study-note blockquote{font-family:var(--serif);margin:14px 0;font-size:22px;line-height:1.25}.study-note>p:last-child{color:var(--muted);font-size:12px}.breadcrumbs{color:var(--muted);gap:10px;padding:28px 0;font-size:11px;display:flex}.breadcrumbs>span{gap:10px;display:flex}.breadcrumbs a:hover{color:var(--ink)}.breadcrumbs i{color:var(--muted);font-style:normal}.course-title{border-bottom:1px solid var(--line);grid-template-columns:auto 1fr auto;align-items:center;gap:26px;padding:28px 0 46px;display:grid}.course-title h1{margin:7px 0 8px;font-size:clamp(43px,5vw,68px);line-height:1}.course-title p{color:var(--muted);margin:0}.course-overview-stat{border-left:1px solid var(--line);flex-direction:column;align-items:end;padding-left:42px;display:flex}.course-overview-stat strong{font-family:var(--serif);font-variant-numeric:tabular-nums;font-size:28px;font-weight:500}.course-overview-stat small{color:var(--muted)}.course-overview-stat span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:10px}.course-layout{grid-template-columns:220px 1fr;gap:72px;padding:54px 0 96px;display:grid}.course-sidebar{align-self:start;position:sticky;top:110px}.course-sidebar .meter-track{margin-bottom:24px}.sidebar-stat strong{color:var(--ink)}.course-sidebar hr{border:0;border-top:1px solid var(--line);margin:25px 0}.course-sidebar h2{font-family:var(--sans);letter-spacing:.13em;text-transform:uppercase;margin-bottom:10px;font-size:10px;font-weight:800}.course-sidebar nav{flex-direction:column;display:flex}.course-sidebar nav a{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;min-height:44px;font-size:12px;display:flex}.course-sidebar nav a[aria-current]{color:var(--subject);font-weight:750}.curriculum .section-heading{border-bottom:1px solid var(--ink);margin-bottom:12px;padding-bottom:19px}.progress-key{color:var(--muted);flex-wrap:wrap;gap:16px;margin-bottom:30px;font-size:10px;display:flex}.progress-key span{align-items:center;gap:7px;display:inline-flex}.unit{margin:0 0 42px}.unit>header{border-bottom:1px solid var(--line);grid-template-columns:46px 1fr auto;align-items:center;gap:15px;min-height:70px;display:grid}.unit>header>span{color:var(--subject);font-family:var(--serif);font-size:24px}.unit>header h3{font-family:var(--serif);margin:0;font-size:21px;font-weight:500}.unit>header small{color:var(--muted)}.topic-row{border-bottom:1px solid var(--line);grid-template-columns:14px 1fr auto 72px;align-items:center;gap:18px;min-height:100px;display:grid}.status-dot{border:1px solid var(--muted);border-radius:50%;flex:none;width:9px;height:9px;display:inline-block}.status-dot.mastered{background:var(--subject);border-color:var(--subject)}.status-dot.in-progress{border:2px solid var(--subject);box-shadow:0 0 0 3px var(--paper), 0 0 0 4px var(--subject)}.topic-row h4{font-family:var(--serif);margin:0;font-size:18px;font-weight:500}.topic-row p,.topic-row small{color:var(--muted);margin:0;font-size:11px}.topic-row>a{justify-content:end;align-items:center;gap:8px;min-height:44px;font-size:12px;font-weight:750;display:flex}.question-count{color:var(--muted);font-size:10px}.notes-page{width:min(1160px,100% - 48px)}.notes-layout{grid-template-columns:190px minmax(0,800px);justify-content:center;gap:clamp(30px,5vw,72px);padding:28px 0 100px;display:grid}.contents-panel{align-self:start;position:sticky;top:112px}.contents-panel nav{border-top:1px solid var(--line);flex-direction:column;display:flex}.contents-panel nav a{min-height:42px;color:var(--muted);border-bottom:1px solid var(--line);align-items:center;font-size:11px;display:flex}.contents-panel nav a[aria-current]{color:var(--subject);border-left:2px solid var(--subject);padding-left:10px;font-weight:750}.page-completion{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;grid-template-columns:1fr auto;gap:9px;margin-top:30px;font-size:10px;display:grid}.page-completion strong{color:var(--ink)}.page-completion .meter-track{grid-column:1/-1}.note-header{border-bottom:1px solid var(--ink);padding:20px 0 48px}.note-header h1{margin:18px 0;font-size:clamp(48px,6vw,76px);line-height:.97}.note-header>p{color:var(--muted);font-family:var(--serif);max-width:680px;font-size:21px;line-height:1.45}.note-actions{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;flex-wrap:wrap;align-items:center;gap:18px;font-size:10px;display:flex}.note-actions span+span:before{content:"·";margin-right:18px}.note-article>section{border-bottom:1px solid var(--line);padding:52px 0}.note-article section>h2{margin-bottom:17px;font-size:32px;line-height:1.12}.note-article section>p:not(.section-number,.eyebrow){max-width:710px;font-family:var(--serif);font-size:18px;line-height:1.72}.section-number{color:var(--subject)}.definition{border-left:3px solid var(--subject);background:var(--surface-soft);grid-template-columns:120px 1fr;gap:24px;margin-top:28px;padding:22px 24px;display:grid}.definition>span{color:var(--subject);letter-spacing:.1em;text-transform:uppercase;font-size:9px;font-weight:800}.definition p{font-family:var(--serif);margin:0}.reasoning-chain{border-top:1px solid var(--line);margin:30px 0 0;padding:0;list-style:none}.reasoning-chain li{border-bottom:1px solid var(--line);grid-template-columns:44px 1fr;gap:20px;padding:19px 0;display:grid}.reasoning-chain li>span{border:1px solid var(--subject);width:30px;height:30px;color:var(--subject);font-family:var(--serif);border-radius:50%;place-items:center;display:grid}.reasoning-chain strong{font-family:var(--serif);font-size:18px;font-weight:500}.reasoning-chain p{color:var(--muted);margin:2px 0 0;font-size:13px}.worked-example{border:1px solid var(--line);background:var(--surface)}.worked-example header{border-bottom:1px solid var(--line);color:var(--muted);letter-spacing:.1em;text-transform:uppercase;justify-content:space-between;padding:12px 18px;font-size:9px;font-weight:800;display:flex}.question-text{font-family:var(--serif);margin:0;padding:25px 25px 18px;font-size:18px}.answer-lines{padding:0 25px 25px}.answer-lines p{grid-template-columns:26px 1fr;margin:10px 0;font-size:13px;display:grid}.answer-lines i{background:var(--subject);color:#fff;border-radius:50%;place-items:center;width:18px;height:18px;font-size:9px;font-style:normal;display:grid}.pitfall{background:var(--pitfall-bg);border-top:1px solid var(--pitfall-line);border-bottom:1px solid var(--pitfall-line);grid-template-columns:58px 1fr;gap:24px;margin:48px 0;padding:33px;display:grid}.pitfall-mark{border:1px solid var(--danger);width:48px;height:48px;color:var(--danger);font-family:var(--serif);border-radius:50%;place-items:center;font-size:25px;display:grid}.pitfall h2{margin:0 0 5px;font-size:24px}.pitfall p:last-child{color:var(--muted);margin:0;font-size:13px}.recall-block{background:var(--ink);color:var(--paper);border:0!important;padding:42px!important}.recall-block .eyebrow{color:color-mix(in srgb, var(--paper) 65%, var(--ink))}.recall-block h2{max-width:620px}.recall-block .button{background:var(--paper);color:var(--ink);border-color:var(--paper);margin-top:12px}.practice-shell{background:var(--surface);min-height:100dvh}.runner{grid-template-rows:auto auto 1fr auto;min-height:calc(100dvh - 72px);display:grid}.runner-header{border-bottom:1px solid var(--line);grid-template-columns:1fr auto 1fr;align-items:center;min-height:74px;padding:12px clamp(24px,5vw,72px);display:grid}.runner-header>a{justify-self:start;align-items:center;gap:8px;min-height:44px;font-size:20px;display:flex}.runner-header>a span{font-size:11px}.runner-header>div{text-align:center}.runner-header .context-line{justify-content:center}.runner-header>div strong{font-family:var(--serif);font-weight:500}.question-mark{color:var(--muted);justify-self:end;font-size:11px}.runner-progress{border-bottom:1px solid var(--line);color:var(--muted);text-transform:uppercase;letter-spacing:.09em;grid-template-columns:1fr minmax(240px,420px) 1fr;align-items:center;gap:30px;padding:16px clamp(24px,5vw,72px);font-size:10px;display:grid}.runner-progress>span:last-child{text-align:right}.question-dashes{gap:5px;display:flex}.question-dashes i{background:var(--line);flex:1;height:3px}.question-dashes i.complete{background:var(--subject);opacity:.45}.question-dashes i.current{background:var(--subject)}.question-stage{width:min(720px,100% - 48px);margin:0 auto;padding:64px 0}.difficulty{color:var(--muted);letter-spacing:.14em;align-items:center;gap:9px;font-size:9px;font-weight:800;display:flex}.difficulty span{background:#d29335;border-radius:50%;width:8px;height:8px}.question-stage h1{margin:15px 0 11px;font-size:clamp(32px,4vw,46px);line-height:1.14}.instruction{color:var(--muted);font-size:12px}.answer-options{gap:10px;margin-top:30px;display:grid}.answer-options button{border:1px solid var(--line);background:var(--paper);text-align:left;cursor:pointer;grid-template-columns:40px 1fr auto;align-items:center;gap:15px;min-height:64px;padding:10px 16px;transition:border-color .18s,transform .18s,background .18s;display:grid}.answer-options button:hover,.answer-options button.selected{border-color:var(--subject)}.answer-options button:hover{transform:translate(2px)}.answer-options button.selected{box-shadow:inset 3px 0 0 var(--subject)}.answer-options button.correct{border-color:var(--success);background:var(--success-bg);box-shadow:inset 3px 0 0 var(--success)}.answer-options button.incorrect{border-color:var(--danger);background:var(--danger-bg);box-shadow:inset 3px 0 0 var(--danger)}.option-letter{border:1px solid var(--line);width:34px;height:34px;font-family:var(--serif);border-radius:50%;place-items:center;display:grid}.answer-state{font-size:20px}.feedback{border-left:3px solid var(--success);background:var(--success-bg);margin-top:18px;padding:20px 22px}.feedback.try-again{border-color:var(--danger);background:var(--danger-bg)}.feedback>strong{font-family:var(--serif);font-size:19px;font-weight:500}.feedback p{margin:4px 0 0;font-size:12px}.feedback .text-button{margin-top:14px}.feedback .explanation{border-top:1px solid color-mix(in srgb, var(--danger) 30%, transparent);margin-top:14px;padding-top:14px}.runner-footer{border-top:1px solid var(--line);background:color-mix(in srgb, var(--surface) 94%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);justify-content:space-between;align-items:center;min-height:84px;padding:17px clamp(24px,5vw,72px);display:flex;position:sticky;bottom:0}footer{border-top:1px solid var(--line);min-height:92px;color:var(--muted);letter-spacing:.13em;text-transform:uppercase;justify-content:space-between;align-items:center;padding:0 clamp(24px,5vw,72px);font-size:9px;font-weight:700;display:flex}.public-shell{grid-template-rows:auto 1fr auto;min-height:100dvh;display:grid}.public-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;min-height:76px;padding:0 clamp(20px,5vw,72px);display:flex}.public-header nav{align-items:center;gap:18px;font-size:12px;font-weight:700;display:flex}.button.compact{min-height:44px;padding-inline:16px}.waitlist-main{grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);align-items:start;gap:clamp(64px,10vw,150px);width:min(1180px,100% - 48px);margin:0 auto;padding:clamp(70px,10vw,140px) 0 100px;display:grid}.waitlist-copy h1{max-width:760px;margin:16px 0 28px;font-size:clamp(54px,7vw,96px);line-height:.93}.waitlist-lede{max-width:620px;color:var(--muted);font-family:var(--serif);text-wrap:pretty;font-size:21px;line-height:1.55}.waitlist-details{border-top:1px solid var(--line);max-width:650px;margin:52px 0 0}.waitlist-details div{border-bottom:1px solid var(--line);grid-template-columns:110px 1fr;align-items:center;gap:20px;min-height:66px;display:grid}.waitlist-details dt{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:10px;font-weight:800}.waitlist-details dd{font-family:var(--serif);margin:0;font-size:16px}.waitlist-form-panel{background:var(--surface);border:1px solid var(--line);box-shadow:0 24px 70px color-mix(in srgb, var(--paper-deep) 58%, transparent);padding:34px}.privacy-note{color:var(--muted);margin:20px 0 0;font-size:10px;line-height:1.5}.public-footer{min-height:82px}.public-footer div{gap:22px;display:flex}.account-form h2{margin:0 0 28px;font-size:28px}.account-form label{color:var(--muted);gap:7px;margin-top:18px;font-size:11px;font-weight:700;display:grid}.account-form input{border:1px solid var(--line);background:var(--paper);width:100%;min-height:50px;color:var(--ink);border-radius:0;outline:none;padding:0 14px}.account-form input:focus{border-color:var(--blue);box-shadow:inset 3px 0 0 var(--blue)}.account-form .button{width:100%;margin-top:22px}.form-guidance{color:var(--muted);margin:9px 0 0;font-size:10px}.form-message{border-left:3px solid var(--danger);background:var(--danger-bg);margin:16px 0 0;padding:12px 14px;font-size:11px}.form-message.success{border-color:var(--success);background:var(--success-bg)}.form-foot{color:var(--muted);text-align:center;margin:22px 0 0;font-size:11px}.form-foot a,.text-link{color:var(--ink);text-underline-offset:3px;text-decoration:underline}.account-page{grid-template-rows:auto 1fr;width:min(1120px,100% - 48px);min-height:100dvh;margin:0 auto;display:grid}.account-page>header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;min-height:82px;display:flex}.account-page>section{grid-template-columns:1fr minmax(340px,430px);align-items:center;gap:clamp(70px,10vw,150px);padding:70px 0 110px;display:grid}.account-intro h1{max-width:650px;margin:15px 0 22px;font-size:clamp(48px,6vw,78px);line-height:.96}.account-intro>p:last-child{max-width:560px;color:var(--muted);font-family:var(--serif);font-size:19px}.account-page .account-form{border:1px solid var(--line);background:var(--surface);padding:34px}.admin-shell{min-height:100dvh}.admin-sidebar{z-index:30;border-right:1px solid var(--line);background:var(--paper-deep);flex-direction:column;width:260px;height:100dvh;padding:26px 22px 24px;display:flex;position:fixed;inset:0 auto 0 0}.sidebar-head{justify-content:space-between;align-items:center;display:flex}.sidebar-close{background:0 0;border:0;width:44px;height:44px;font-size:24px;display:none}.sidebar-label{color:var(--muted);letter-spacing:.14em;text-transform:uppercase;margin:44px 8px 10px;font-size:9px;font-weight:800}.sidebar-nav{border-top:1px solid var(--line);flex-direction:column;display:flex}.sidebar-nav a{border-bottom:1px solid var(--line);min-height:48px;color:var(--muted);grid-template-columns:28px 1fr;align-items:center;gap:10px;font-size:12px;display:grid}.sidebar-nav a>span{color:var(--subject);font-family:var(--serif)}.sidebar-nav a[aria-current=page]{color:var(--ink);border-left:2px solid var(--blue);background:var(--surface-soft);padding-left:8px;font-weight:750}.sidebar-membership{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:auto;padding:19px 0 22px}.sidebar-membership>span{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:9px;font-weight:800}.sidebar-membership strong{font-family:var(--serif);margin-top:5px;font-size:24px;font-weight:500;display:block}.sidebar-membership strong small{color:var(--muted);font-family:var(--sans);font-size:10px;font-weight:600}.sidebar-membership p{color:var(--muted);margin:6px 0 12px;font-size:10px;line-height:1.5}.sidebar-membership a{text-underline-offset:3px;font-size:11px;text-decoration:underline}.admin-sidebar>.theme-toggle{justify-content:start;margin-top:16px}.admin-stage{min-height:100dvh;margin-left:260px}.admin-topbar{z-index:20;border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--paper) 93%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);justify-content:space-between;align-items:center;gap:20px;min-height:72px;padding:0 clamp(20px,4vw,58px);display:flex;position:sticky;top:0}.menu-button{border:1px solid var(--line);background:0 0;width:44px;height:44px;display:none}.topbar-title{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:10px;font-weight:800}.account-actions{align-items:center;gap:18px;font-size:11px;font-weight:750;display:flex}.admin-stage .dashboard,.admin-stage .course-page,.admin-stage .notes-page{width:min(1120px,100% - 48px)}.waitlist-admin h1{margin:12px 0 18px;font-size:clamp(48px,7vw,76px);line-height:.95}.waitlist-admin>p:not(.eyebrow){max-width:620px;color:var(--muted)}.waitlist-admin>.button{margin:24px 0 16px;display:inline-flex}.preview-notice{border-left:2px solid var(--blue);width:280px;padding:15px 0 4px 22px}.preview-notice span,.preview-tag,.course-access{color:var(--blue);letter-spacing:.1em;text-transform:uppercase;font-size:9px;font-weight:800}.preview-notice p{color:var(--muted);margin:5px 0 0;font-size:11px}.course-access{border-right:1px solid var(--line);padding-right:22px}.account-empty-state{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);grid-template-columns:1fr auto;align-items:end;gap:50px;padding:38px 0;display:grid}.account-empty-state h2{margin-bottom:7px;font-size:28px}.account-empty-state p:last-child{max-width:660px;color:var(--muted);margin:0;font-size:13px}.sidebar-copy,.preview-side-note{color:var(--muted);font-size:11px;line-height:1.6}.course-sidebar .sidebar-copy{margin-bottom:30px}.preview-side-note{margin-top:28px}.status-dot.sample{background:var(--subject);border-color:var(--subject)}.status-dot.locked{opacity:.65;border-style:dashed}.membership-preview{min-height:520px;position:relative;overflow:hidden}.membership-preview-content{filter:blur(4px);opacity:.32;-webkit-user-select:none;user-select:none;pointer-events:none;max-height:540px;overflow:hidden}.membership-gate{z-index:2;border:1px solid var(--line);background:color-mix(in srgb, var(--surface) 96%, transparent);width:min(620px,100% - 32px);box-shadow:0 24px 80px color-mix(in srgb, var(--paper-deep) 70%, transparent);text-align:left;margin:0 auto;padding:38px;position:absolute;inset:90px 0 auto}.membership-gate h2{margin-bottom:10px;font-size:32px}.membership-gate>p:not(.eyebrow){color:var(--muted);font-size:13px}.membership-gate>div{align-items:center;gap:22px;margin-top:24px;display:flex}.membership-gate .text-link{font-size:11px}.membership-page{width:min(1060px,100% - 48px);margin:0 auto;padding:82px 0 110px}.membership-heading{border-bottom:1px solid var(--line);grid-template-columns:1.2fr .8fr;align-items:end;gap:60px;padding-bottom:48px;display:grid}.membership-heading h1{max-width:750px;margin:10px 0 0;font-size:clamp(52px,7vw,84px);line-height:.94}.membership-heading p{color:var(--muted);font-family:var(--serif);font-size:18px}.membership-offer{border-bottom:1px solid var(--line);grid-template-columns:.8fr 1.2fr;gap:80px;padding:58px 0;display:grid}.membership-price{font-family:var(--serif);margin-bottom:12px;font-size:44px;display:block}.membership-price small{color:var(--muted);font-family:var(--sans);font-size:12px}.membership-offer>div:first-child p{color:var(--muted);font-size:12px}.membership-offer h2{font-size:28px}.membership-offer ul{border-top:1px solid var(--line);margin:24px 0 0;padding:0;list-style:none}.membership-offer li{border-bottom:1px solid var(--line);font-family:var(--serif);padding:13px 0}.membership-offer li:before{content:"✓";color:var(--success);font-family:var(--sans);margin-right:12px}.billing-note{max-width:700px;color:var(--muted);margin:26px 0 0;font-size:11px}.legal-page{width:min(720px,100% - 40px);margin:0 auto;padding:70px 0 120px}.legal-page>a{font-size:11px}.legal-page h1{margin:70px 0 30px;font-size:64px}.legal-page p{color:var(--muted);font-family:var(--serif);font-size:18px;line-height:1.7}.preview-dashboard{padding-top:82px}.preview-header{border-bottom:1px solid var(--line);max-width:720px;padding-bottom:44px}.preview-header h1{margin:12px 0 16px;font-size:clamp(54px,7vw,86px);line-height:.94}.preview-header>p:last-child{color:var(--muted);font-family:var(--serif);margin:0;font-size:18px}.preview-subjects{border-top:1px solid var(--line);margin-top:52px}.preview-subjects>a{border-bottom:1px solid var(--line);grid-template-columns:62px 1fr auto;align-items:center;gap:24px;min-height:112px;transition:padding .18s,background .18s;display:grid}.preview-subjects>a:hover{background:var(--surface-soft);padding-inline:12px}.preview-subjects .subject-mark{width:52px;height:64px}.preview-subjects>a>span{flex-direction:column;display:flex}.preview-subjects small{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:9px;font-weight:750}.preview-subjects strong{font-family:var(--serif);font-size:25px;font-weight:500}.preview-subjects i{color:var(--subject);font-size:20px;font-style:normal}.preview-hold{color:var(--muted);margin:28px 0 0;font-size:11px}.subject-hub,.curriculum-page,.empty-topic-page{width:min(1080px,100% - 48px);margin:0 auto;padding-bottom:110px}.subject-hub-header{border-bottom:1px solid var(--line);grid-template-columns:auto 1fr;align-items:center;gap:28px;padding:36px 0 54px;display:grid}.subject-hub-header h1{margin:7px 0 10px;font-size:clamp(54px,7vw,82px);line-height:.94}.subject-hub-header p:last-child{color:var(--muted);margin:0}.subject-route-list{border-top:1px solid var(--line);margin-top:48px}.subject-route-list>a{border-bottom:1px solid var(--line);grid-template-columns:54px 1fr auto;align-items:center;gap:26px;min-height:150px;transition:padding .18s,background .18s;display:grid}.subject-route-list>a:hover{background:var(--surface-soft);padding-inline:14px}.subject-route-list>a>span{color:var(--subject);font-family:var(--serif);font-size:24px}.subject-route-list h2{margin:0 0 5px;font-size:32px}.subject-route-list p{color:var(--muted);margin:0;font-size:12px}.subject-route-list i{color:var(--subject);font-size:24px;font-style:normal}.curriculum-header{border-bottom:1px solid var(--ink);max-width:820px;padding:34px 0 42px}.curriculum-header h1{margin:12px 0 15px;font-size:clamp(54px,7vw,82px);line-height:.94}.curriculum-header>p:last-child{color:var(--muted);font-family:var(--serif);margin:0;font-size:18px}.mode-switch{border-bottom:1px solid var(--line);align-items:end;gap:30px;min-height:70px;display:flex}.mode-switch a{min-height:46px;color:var(--muted);border-bottom:2px solid #0000;align-items:center;font-size:12px;font-weight:750;display:flex}.mode-switch a[aria-current=page]{color:var(--ink);border-bottom-color:var(--subject)}.year-library{gap:82px;margin-top:58px;display:grid}.year-section>header{border-bottom:1px solid var(--ink);grid-template-columns:58px 1fr;align-items:center;gap:22px;padding-bottom:22px;display:grid}.year-section>header>span{color:var(--subject);font-family:var(--serif);font-size:34px}.year-section>header h2{margin:0;font-size:36px}.curriculum-groups{gap:52px;padding-top:36px;display:grid}.curriculum-group h3{color:var(--subject);font-family:var(--sans);letter-spacing:.11em;text-transform:uppercase;margin:0 0 14px;font-size:11px;font-weight:800}.curriculum-group>div{border-top:1px solid var(--line)}.curriculum-group a{border-bottom:1px solid var(--line);grid-template-columns:42px 1fr auto;align-items:center;gap:16px;min-height:58px;transition:padding .18s,background .18s;display:grid}.curriculum-group a:hover{background:var(--surface-soft);padding-inline:10px}.curriculum-group a>span{color:var(--muted);font-variant-numeric:tabular-nums;font-size:9px}.curriculum-group a strong{font-family:var(--serif);font-size:16px;font-weight:500}.curriculum-group a i{color:var(--subject);font-style:normal}.empty-year{color:var(--muted);border-bottom:1px solid var(--line);font-family:var(--serif);margin:28px 0 0;padding:28px 0}.empty-topic-page>header{border-bottom:1px solid var(--ink);max-width:880px;padding:42px 0 46px}.empty-topic-page>header h1{margin:13px 0 0;font-size:clamp(50px,7vw,78px);line-height:.98}.empty-content{border-bottom:1px solid var(--line);text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:360px;display:flex}.empty-content>span{color:var(--muted);letter-spacing:.14em;text-transform:uppercase;font-size:9px;font-weight:800}.empty-content p{font-family:var(--serif);margin:9px 0 26px;font-size:20px}.empty-content a{text-underline-offset:3px;font-size:11px;text-decoration:underline}@media (width<=900px){.app-header{grid-template-columns:1fr auto}.app-header nav{display:none}.welcome{flex-direction:column;align-items:start}.week-meter{width:100%}.lower-grid{grid-template-columns:1fr}.course-layout{grid-template-columns:1fr;gap:36px}.course-sidebar{position:static}.notes-layout{grid-template-columns:1fr}.contents-panel{display:none}.runner-header{grid-template-columns:1fr auto}.runner-header>div{display:none}.waitlist-main,.account-page>section{grid-template-columns:1fr}.waitlist-form-panel,.account-page .account-form{width:min(100%,500px)}.admin-sidebar{transition:transform .22s;transform:translate(-100%)}.admin-sidebar.open{transform:translate(0)}.sidebar-close,.menu-button{place-items:center;display:grid}.sidebar-backdrop{z-index:25;background:#080c1285;border:0;position:fixed;inset:0}.admin-stage{margin-left:0}.admin-topbar{justify-content:flex-start}.account-actions{margin-left:auto}.membership-heading,.membership-offer{grid-template-columns:1fr;gap:34px}.subject-hub,.curriculum-page,.empty-topic-page{width:min(100% - 48px,1080px)}}@media (width<=620px){.dashboard,.course-page,.notes-page{width:min(100% - 32px,1180px)}.app-header{height:64px}.wordmark em{display:none}.dashboard{padding-top:42px}.welcome h1{font-size:45px}.continue-panel{grid-template-columns:34px 1fr}.continue-main{padding:24px 20px}.continue-panel>.button{grid-column:2;margin:0 20px 24px}.course-row{grid-template-columns:56px 1fr 20px;gap:14px}.course-row .subject-mark{width:48px;height:62px}.course-stat{display:none}.section-heading{align-items:start}.section-heading .quiet-meta{text-align:right;max-width:120px}.course-title{grid-template-columns:auto 1fr}.course-title .subject-mark{display:none}.course-overview-stat{border-left:0;border-top:1px solid var(--line);grid-column:1/-1;align-items:start;padding:20px 0 0}.topic-row{grid-template-columns:14px 1fr 52px;padding:15px 0}.topic-row .question-count{display:none}.definition{grid-template-columns:1fr;gap:7px}.pitfall{grid-template-columns:1fr;padding:26px 22px}.recall-block{padding:30px 24px!important}.note-header h1{font-size:46px}.note-actions span+span:before{display:none}.runner{min-height:calc(100dvh - 64px)}.runner-progress{grid-template-columns:auto 1fr;gap:16px;padding-inline:16px}.runner-progress>span:last-child{display:none}.question-stage{width:min(100% - 32px,720px);padding:42px 0}.answer-options button{min-height:68px;padding-inline:12px}.runner-footer{padding:12px 16px}.runner-footer .button{padding:0 14px}footer{flex-direction:column;justify-content:center;align-items:flex-start;gap:6px}.public-header{min-height:68px}.brand-logo-frame{width:58px;height:50px}.public-header nav>a:first-of-type,.public-header .theme-toggle span:last-child{display:none}.waitlist-main{gap:48px;width:min(100% - 32px,1180px);padding:56px 0 70px}.waitlist-copy h1{font-size:52px}.waitlist-lede{font-size:18px}.waitlist-details div{grid-template-columns:1fr;gap:3px;padding:13px 0}.waitlist-form-panel{padding:24px 20px}.account-page{width:min(100% - 32px,1120px)}.account-page>header .theme-toggle span:last-child{display:none}.account-page>section{gap:38px;padding-top:52px}.account-intro h1{font-size:48px}.account-page .account-form{padding:24px 20px}.admin-sidebar{width:min(86vw,300px)}.admin-topbar{min-height:64px;padding-inline:14px}.topbar-title{display:none}.account-actions{gap:10px}.account-actions>a:first-child{display:none}.admin-stage .dashboard,.admin-stage .course-page,.admin-stage .notes-page{width:min(100% - 32px,1120px)}.preview-notice{width:100%}.account-empty-state{grid-template-columns:1fr;align-items:start;gap:24px}.course-access{display:none}.membership-gate{padding:28px 22px;inset:46px 0 auto}.membership-gate>div{flex-direction:column;align-items:stretch}.membership-page{width:min(100% - 32px,1060px);padding-top:58px}.membership-heading h1{font-size:50px}.preview-dashboard{padding-top:54px}.preview-header h1{font-size:52px}.preview-subjects>a{grid-template-columns:54px 1fr auto;gap:16px}.subject-hub,.curriculum-page,.empty-topic-page{width:min(100% - 32px,1080px)}.subject-hub-header{grid-template-columns:1fr}.subject-hub-header .subject-mark{display:none}.subject-hub-header h1,.curriculum-header h1{font-size:50px}.subject-route-list>a{grid-template-columns:42px 1fr auto;gap:16px}.subject-route-list h2{font-size:27px}.year-section>header{grid-template-columns:48px 1fr}.curriculum-group a{grid-template-columns:34px 1fr auto;gap:10px;padding-block:8px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}