:root{--navy:#1a2b4c;--blue:#51a6d9;--teal:#3f8f8a;--coral:#e08a6b;--cream:#f5f1e8;--ink:#333;--muted:#888;--border:#e0e4ec}*{box-sizing:border-box}body{background:var(--cream);color:var(--ink);margin:0;font-family:-apple-system,Segoe UI,Arial,sans-serif}.app-shell{flex-direction:column;max-width:1040px;min-height:100vh;margin:0 auto;padding:0 20px 60px;display:flex}.app-header{border-bottom:1px solid var(--border);align-items:center;margin-bottom:24px;padding:20px 0;display:flex}.brand{align-items:center;gap:12px;display:flex}.brand-btn{cursor:pointer;background:0 0;border:none;padding:0}.brand-logo{width:36px;height:36px}.brand-name{color:var(--navy);font-size:16px;font-weight:400}.brand-name strong{font-weight:700}.link-btn{color:var(--teal);cursor:pointer;background:0 0;border:none;padding:8px 0;font-size:14px;text-decoration:underline}.secondary-btn{color:var(--navy);border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:6px;padding:8px 16px;font-size:14px;font-weight:600;text-decoration:none;display:inline-block}.error-box{color:#a33;background:#fbeaea;border-radius:6px;margin:12px 0;padding:12px;font-size:14px}.loading-screen{min-height:40vh;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:14px;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--navy);border-radius:50%;width:28px;height:28px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.hero{flex:1;padding:12px 0}.eyebrow{text-transform:uppercase;letter-spacing:.08em;color:var(--teal);margin:0 0 8px;font-size:12px;font-weight:700}.hero h1{color:var(--navy);margin:0 0 12px;font-size:30px;line-height:1.2}.hero-sub{color:var(--ink);max-width:560px;margin:0 0 28px;font-size:16px;line-height:1.6}.hero-note{background:var(--cream);border-left:4px solid var(--coral);color:var(--navy);border-radius:0 6px 6px 0;padding:12px 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var(--border);cursor:pointer;width:100%;color:var(--ink);background:#fff;border-radius:8px;align-items:center;gap:10px;padding:10px 12px;font-size:14px;display:flex}.resource-link:hover{border-color:var(--blue)}.resource-link.active{border-color:var(--navy);background:var(--navy);color:#fff}.resource-type{letter-spacing:.04em;color:var(--teal);flex-shrink:0;min-width:34px;font-size:11px;font-weight:700}.resource-link.active .resource-type{color:var(--blue)}.resource-name{line-height:1.3}.track-main{min-width:0}.track-empty{border:1px dashed var(--border);text-align:center;color:var(--muted);background:#fff;border-radius:10px;padding:40px}.resource-view-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.resource-view-head h2{color:var(--navy);margin:0;font-size:18px}.doc-frame{border:1px solid var(--border);background:#fff;border-radius:10px;width:100%;height:78vh}.youtube-frame{border:1px solid var(--border);border-radius:10px;width:100%;max-width:640px;height:360px}.resource-intro{color:var(--ink);margin:0 0 16px;font-size:15px;line-height:1.6}.pptx-viewer{border:1px solid var(--border);background:#fff;border-radius:10px;max-height:78vh;padding:12px;overflow:auto}.pptx-canvas{flex-direction:column;align-items:center;gap:12px;display:flex}.resource-transcript{border-top:1px solid var(--border);margin-top:24px;padding-top:16px}.resource-transcript h3{color:var(--navy);text-transform:uppercase;letter-spacing:.04em;margin:0 0 8px;font-size:15px}.transcript-content{color:var(--ink);font-size:14px;line-height:1.7}.transcript-content h1,.transcript-content h2,.transcript-content h3,.transcript-content h4{color:var(--navy);margin:1.2em 0 .4em}.transcript-content h1{font-size:1.5em}.transcript-content h2{font-size:1.25em}.transcript-content h3{text-transform:none;letter-spacing:normal;font-size:1.1em}.transcript-content h4{font-size:1em}.transcript-content p{margin:0 0 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var(--border);margin:1.2em 0}.transcript-content strong{color:var(--navy)}@media (width<=900px){.track-layout{grid-template-columns:1fr}.toc{display:none}.doc-frame{height:60vh}}@media (width<=480px){.hero h1{font-size:24px}}.app-footer{text-align:center;border-top:1px solid var(--border);margin-top:auto;padding:24px 0 8px}.app-footer a{color:var(--muted);font-size:13px;text-decoration:none}.app-footer a:hover{color:var(--navy);text-decoration:underline}.toc{max-height:calc(100vh - 40px);padding-right:4px;position:sticky;top:20px;overflow-y:auto}.toc-title{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin:0 0 10px;font-size:11px;font-weight:700}.toc-list{border-left:2px solid var(--border);flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.toc-item{padding-left:12px}.toc-item a{color:var(--muted);padding:3px 0;font-size:13px;line-height:1.4;text-decoration:none;transition:color .15s;display:block}.toc-item a:hover{color:var(--navy)}.toc-item.active a{color:var(--navy);font-weight:600}.toc-level-2{padding-left:12px}.toc-level-3{padding-left:24px}.toc-level-4{padding-left:36px}