@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--bg:#151615;--sidebar:#202220;--header:#222322;--surface:#1a1b1a;--selected:#343734;--line:#303330;--text:#f0f1f0;--muted:#a6aaa6;--faint:#767b76;--accent:#9bd7b8}[data-theme=light]{--bg:#fff;--sidebar:#f5f6f5;--header:#fff;--surface:#fafbfa;--selected:#dff2e8;--line:#dfe3df;--text:#1d201d;--muted:#686e69;--faint:#929892;--accent:#29845b}*{box-sizing:border-box}html{scroll-behavior:smooth;color-scheme:dark;background:var(--bg)}[data-theme=light]{color-scheme:light}body{background:var(--bg);color:var(--text);margin:0;font-family:Inter,system-ui,sans-serif;font-size:16px}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:1.2rem}[hidden]{display:none!important}.topbar{z-index:30;border-bottom:1px solid 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17px;font-size:13px;font-weight:700}.grade-group{margin:0 0 10px}.grade-button,.term-button{width:100%;color:var(--muted);text-align:left;cursor:pointer;background:0 0;border:0}.grade-button{border-radius:5px;justify-content:space-between;align-items:center;height:38px;padding:0 10px;font-size:15px;font-weight:600;display:flex}.grade-button svg{width:16px;transition:transform .22s;transform:rotate(0)}.grade-button.active{color:var(--text)}.grade-button[aria-expanded=false] svg{transform:rotate(-90deg)}.grade-button:hover,.term-button:hover{color:var(--text)}.term-list{opacity:1;max-height:156px;margin:3px 0 4px;padding-left:16px;transition:max-height .24s,opacity .18s,margin .24s;overflow:hidden}.grade-button[aria-expanded=false]+.term-list{opacity:0;max-height:0;margin-top:0;margin-bottom:0}.term-button{border-radius:5px;min-height:35px;margin:1px 0;padding:7px 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solid var(--line)}.resource-row{border-top:1px solid var(--line);color:var(--muted)}.resource-row:last-child{border-bottom:1px solid var(--line)}.resource-row:hover{background:var(--surface);color:var(--text)}.resource-row>span{min-width:0;padding:18px}.resource-name{align-items:flex-start;gap:12px;display:flex}.resource-name>svg{color:var(--accent);flex:none;margin-top:2px}.resource-name>span{flex-direction:column;gap:7px;display:flex}.resource-name strong{color:var(--text);font-size:15px;font-weight:550;line-height:1.4}.resource-name small{color:var(--faint);font-size:12px}.resource-summary{flex-direction:column;justify-content:space-between;gap:12px;font-size:15px;line-height:1.55;display:flex}.resource-summary b{color:var(--accent);font-size:13px;font-weight:500}.empty-state{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:34px 18px}.empty-state h3{margin:0 0 8px;font-size:16px}.empty-state p{color:var(--muted);margin:0;font-size:14px}.scrim{z-index:19;background:#00000080;position:fixed;inset:62px 0 0}@media (width<=1080px){.topbar{grid-template-columns:240px minmax(0,1fr) auto}.app-shell{grid-template-columns:240px minmax(0,1fr)}.sidebar{width:240px}.document{padding-inline:48px}.search-field{width:190px}}@media (width<=760px){.topbar{grid-template-columns:1fr auto}.brand{padding-left:18px}.directory{border-bottom:1px solid var(--line);background:var(--bg);height:46px;padding:0 18px;font-size:14px;position:absolute;top:62px;left:0;right:0}.top-actions{padding-right:10px}.search-field{width:140px}.search-field kbd{display:none}.menu-button{display:grid}.app-shell{padding-top:46px;display:block}.sidebar{z-index:20;width:min(82vw,290px);height:auto;transition:transform .18s;position:fixed;top:62px;bottom:0;left:0;transform:translate(-101%)}.sidebar.open{transform:none}.document{padding:42px 22px 64px}.intro{padding-bottom:34px}.intro p{font-size:16px}.resource-head{display:none}.resource-row{padding:18px 0;display:block}.resource-row>span{padding:0 4px}.resource-row>span+span{border-left:0;margin-top:11px;padding-left:36px}.resource-name>svg{width:18px}}@media (width<=430px){.brand{max-width:112px;padding-right:6px;font-size:16px}.search-field{width:120px}.directory button:first-child,.directory svg:first-of-type{display:none}.section-heading{align-items:flex-end}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}.home-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;max-width:1200px;height:84px;margin:auto;padding:0 40px;display:flex}.home-header .brand{padding:0}.home-header nav{color:var(--muted);gap:30px;font-size:14px;display:flex}.home-header nav a[aria-current],.home-header a:hover{color:var(--accent)}.landing{max-width:1200px;margin:auto;padding:0 40px}.hero{max-width:790px;padding:100px 0 88px}.eyebrow{color:var(--accent);letter-spacing:.14em;margin:0 0 24px;font-size:11px;font-weight:600}.hero h1{font-size:clamp(48px,7vw,86px);line-height:1.06}.hero h1 span{color:var(--accent)}.hero-copy{max-width:510px;color:var(--muted);margin:28px 0 32px;font-size:18px;line-height:1.75}.primary-link{background:var(--accent);color:#14281d;border-radius:6px;align-items:center;gap:38px;padding:16px 22px;font-size:14px;font-weight:600;display:inline-flex}.primary-link:hover{filter:brightness(1.1)}.hero-detail{color:var(--faint);margin:20px 0 0;font-size:12px;line-height:1.8}.grade-section{border-top:1px solid var(--line);padding:44px 0 64px}.landing-section-heading{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px;display:flex}.landing-section-heading .eyebrow{margin-bottom:12px}.landing-section-heading 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