@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');
:root{--bg:#f7f7f2;--paper:#fff;--ink:#273a32;--muted:#788178;--line:#e4e7dd;--green:#29483b;--lime:#d9e8b3;--pale:#eef2e5;--soft:#f5f6ef;--wrong:#ae4c3e;--wrong-bg:#fff0eb;--right:#2c7050;--right-bg:#edf7ee;--amber:#886624;--amber-bg:#fff7e6;--shadow:0 8px 32px #25372b08;--radius:18px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans',Arial,sans-serif;font-size:15px;line-height:1.6}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button,a{touch-action:manipulation}a{color:var(--green)}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #90b870;outline-offset:4px}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{font-family:'Manrope','DM Sans',Arial,sans-serif;line-height:1.3}h1{font-size:38px;font-weight:750;letter-spacing:-1.5px}h2{font-size:21px;letter-spacing:-.55px;font-weight:750}h3{font-size:16px;font-weight:750}svg{width:20px;height:20px;flex-shrink:0;stroke-width:1.7;vertical-align:middle}button svg{pointer-events:none}.muted{color:var(--muted)}.small{font-size:12px}.eyebrow{font-size:11px;letter-spacing:1.7px;font-weight:700;text-transform:uppercase}.skip-link{position:fixed;left:10px;top:-100px;background:var(--green);color:white;padding:12px;z-index:100}.skip-link:focus{top:10px}.loading{min-height:100vh;display:grid;place-content:center;text-align:center;gap:20px}.brand-mark{width:43px;height:43px;background:var(--green);border-radius:13px;display:flex;align-items:center;justify-content:center;color:var(--bg);font-family:'Manrope',sans-serif;font-size:30px;font-weight:800;letter-spacing:-5px;padding-right:4px;line-height:1}.brand-mark span{color:var(--lime);margin-top:6px}.brand{display:flex;align-items:center;gap:11px}.brand-name{font-family:'Manrope',sans-serif;font-size:19px;font-weight:800;letter-spacing:-.7px}.brand-sub{font-size:10px;letter-spacing:1.7px;color:var(--muted);line-height:1.3;margin-top:3px}.sidebar{width:235px;background:#fcfcf8;border-right:1px solid var(--line);height:100vh;position:fixed;inset:0 auto 0 0;padding:34px 24px 23px;display:flex;flex-direction:column;z-index:20}.course-box{background:var(--pale);border:1px solid #e1e7d4;border-radius:12px;padding:13px;margin-top:40px;display:flex;align-items:center;gap:11px}.course-symbol{width:34px;height:36px;background:#fff;border-radius:9px;display:grid;place-items:center}.course-symbol svg{width:20px;color:var(--green)}.course-name{font-weight:700;font-size:13px}.course-box .small{font-size:10px;color:#7d8779}.course-select{width:100%;padding:8px;border:1px solid var(--line);border-radius:8px;background:white}.nav-label{color:#9a9f96;font-size:10px;font-weight:650;letter-spacing:1.5px;margin:31px 13px 9px}.nav{display:grid;gap:5px}.nav button{border:0;background:transparent;text-align:left;border-radius:9px;padding:11px 13px;display:flex;align-items:center;gap:12px;color:#727e72;font-size:13px;font-weight:550}.nav button.active{color:var(--green);background:#e9eddf;font-weight:700}.nav button:hover{background:#f0f2e9}.nav-count{margin-left:auto;background:#dce4cf;padding:0 7px;border-radius:5px;font-size:10px}.sidebar-bottom{margin-top:auto}.local-note{padding:15px 12px;border-top:1px solid var(--line);font-size:11px;color:#84907f;line-height:1.6}.local-note svg{width:15px;height:15px;margin-right:5px}.sidebar-footer{font-size:10px;color:#9a9f96;padding:10px 12px 0;display:flex;justify-content:space-between}.main-shell{margin-left:235px}.topbar{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:#fcfcf8}.crumb{font-size:12px;color:#8d9588;display:flex;gap:10px;align-items:center}.crumb svg{width:12px;height:12px}.crumb strong{font-weight:550;color:var(--ink)}.top-meta{display:flex;gap:16px;align-items:center}.pill{font-size:10px;font-weight:650;line-height:1.5;padding:5px 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.stat-icon{background:#eef0f7;color:#8895af}.stat:nth-child(3) .stat-icon{background:#f8f0e5;color:#bd9f6c}.stat:nth-child(4) .stat-icon{background:#f1edf7;color:#9d8aae}.stat-value{font-family:'Manrope',sans-serif;font-size:23px;font-weight:750;line-height:1.25;letter-spacing:-.8px}.stat-label{font-size:10px;color:var(--muted);margin-top:3px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:17px}.section-heading h2{font-size:18px}.section-heading p{font-size:11px;color:var(--muted);margin-top:4px}.text-link{border:0;background:none;display:inline-flex;align-items:center;gap:6px;font-size:11px;color:#69805b;font-weight:650;text-decoration:none;padding:6px 0}.text-link svg{width:13px;height:13px}.lecture-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.lecture-card{background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:18px;text-align:left;transition:transform .15s,border 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.figure-button{display:block;width:100%;border:0;background:transparent;padding:0;text-align:center;color:#849475;cursor:zoom-in}.figure-button>span{display:block;font-size:10px;margin:-12px 0 20px}.figure-button .question-figure{margin-top:22px;margin-bottom:20px}

.source-annotations{margin-top:12px;border-top:1px solid var(--line);padding-top:9px;font-size:10px}.source-annotations summary{cursor:pointer;color:var(--muted)}.source-annotations ul{padding-left:16px}.source-annotations li{margin:6px 0}

.collection-select{max-width:200px;border:1px solid var(--line);border-radius:7px;padding:6px;font-size:11px;background:white;color:var(--ink)}@media(max-width:720px){.collection-select{max-width:145px;font-size:10px}.top-meta:has(.collection-select) .pill{display:none}}