:root{--navy:#1a2b4c;--blue:#51a6d9;--teal:#2f6f6a;--coral:#e08a6b;--cream:#f5f1e8;--ink:#333;--muted:#6b6b6b;--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;text-decoration:none;display:flex}.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;display:inline-block}.breadcrumb ol{flex-wrap:wrap;align-items:center;gap:6px;margin:8px 0 0;padding:0;font-size:13px;list-style:none;display:flex}.breadcrumb li+li:before{content:"/";color:var(--muted);margin-right:6px}.breadcrumb a{color:var(--teal);text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.breadcrumb [aria-current=page]{color:var(--muted)}a:focus-visible,button:focus-visible{outline:2px solid var(--navy);outline-offset:2px;border-radius:4px}h1:focus,h2:focus{outline:none}.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 16px;font-size:14px;font-style:italic}.track-list{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.track-card{text-align:left;border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:10px;flex-direction:column;gap:6px;width:100%;height:100%;padding:18px 20px;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:flex}.track-card:hover{border-color:var(--blue);box-shadow:0 4px 16px #1a2b4c14}.track-card-title{color:var(--navy);font-size:17px;font-weight:700}.track-card-meta{color:var(--muted);font-size:13px}.track-page{flex-direction:column;flex:1;display:flex}.track-title{color:var(--navy);margin:8px 0 16px;font-size:24px}.track-title:focus-visible{outline:none}.track-layout{grid-template-columns:220px 1fr 200px;align-items:start;gap:24px;display:grid}.track-sidebar ul{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.resource-link{text-align:left;border:1px solid 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;text-decoration:none;display:flex}.resource-link:visited{color:var(--ink)}.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;overflow:hidden}.pptx-toolbar{border-bottom:1px solid var(--border);background:#f8f9fb;justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.pptx-nav{align-items:center;gap:8px;display:flex}.pptx-nav-btn{border:1px solid var(--border);width:32px;height:32px;color:var(--navy);cursor:pointer;background:#fff;border-radius:6px;justify-content:center;align-items:center;font-size:20px;line-height:1;transition:background .15s,border-color .15s;display:flex}.pptx-nav-btn:hover:not(:disabled){background:var(--navy);color:#fff;border-color:var(--navy)}.pptx-nav-btn:disabled{opacity:.35;cursor:default}.pptx-counter{color:var(--muted);text-align:center;-webkit-user-select:none;user-select:none;min-width:60px;font-size:13px;font-weight:600}.pptx-fullscreen-btn{border:1px solid var(--border);width:32px;height:32px;color:var(--navy);cursor:pointer;background:#fff;border-radius:6px;justify-content:center;align-items:center;font-size:16px;transition:background .15s,border-color .15s;display:flex}.pptx-fullscreen-btn:hover{background:var(--navy);color:#fff;border-color:var(--navy)}.pptx-exit-btn{border:1px solid var(--border);color:var(--navy);cursor:pointer;white-space:nowrap;background:#fff;border-radius:6px;align-items:center;gap:6px;padding:6px 14px;font-size:13px;font-weight:600;transition:background .15s,border-color .15s;display:flex}.pptx-exit-btn:hover{color:#a33;background:#fbeaea;border-color:#c44}.pptx-canvas{background:#e8e8e8;flex-direction:column;align-items:center;gap:12px;max-height:70vh;padding:12px;display:flex;overflow-y:auto}.pptx-strip{border-top:1px solid var(--border);background:#f8f9fb;gap:4px;padding:8px 12px;display:flex;overflow-x:auto}.pptx-strip-btn{border:1px solid var(--border);width:36px;height:28px;color:var(--muted);cursor:pointer;background:#fff;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:600;transition:all .15s;display:flex}.pptx-strip-btn:hover{border-color:var(--blue);color:var(--navy)}.pptx-strip-btn.active{background:var(--navy);color:#fff;border-color:var(--navy)}.pptx-fullscreen{z-index:1000;background:#1a1a1a;border:none;border-radius:0;flex-direction:column;display:flex;position:fixed;inset:0}.pptx-fullscreen .pptx-toolbar{background:#2a2a2a;border-bottom-color:#444;flex-shrink:0}.pptx-fullscreen .pptx-nav-btn{color:#ddd;background:#3a3a3a;border-color:#555}.pptx-fullscreen .pptx-nav-btn:hover:not(:disabled){background:var(--blue);border-color:var(--blue);color:#fff}.pptx-fullscreen .pptx-counter{color:#aaa}.pptx-fullscreen .pptx-fullscreen-btn{color:#ddd;background:#3a3a3a;border-color:#555}.pptx-fullscreen .pptx-fullscreen-btn:hover{background:var(--blue);border-color:var(--blue);color:#fff}.pptx-fullscreen .pptx-exit-btn{color:#ddd;background:#3a3a3a;border-color:#555}.pptx-fullscreen .pptx-exit-btn:hover{color:#f88;background:#5a2020;border-color:#c44}.pptx-fullscreen .pptx-canvas{background:#0d0d0d;flex:1;gap:24px;max-height:none;padding:24px}.pptx-fullscreen .pptx-strip{background:#2a2a2a;border-top-color:#444;flex-shrink:0}.pptx-fullscreen .pptx-strip-btn{color:#aaa;background:#3a3a3a;border-color:#555}.pptx-fullscreen .pptx-strip-btn:hover{border-color:var(--blue);color:#fff}.pptx-fullscreen .pptx-strip-btn.active{background:var(--blue);border-color:var(--blue);color:#fff}.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 .8em}.transcript-content ul,.transcript-content ol{margin:0 0 .8em;padding-left:1.5em}.transcript-content li{margin-bottom:.3em}.transcript-content blockquote{border-left:4px solid var(--coral);color:var(--navy);background:#f5f1e880;border-radius:0 6px 6px 0;margin:0 0 .8em;padding:4px 16px;font-style:italic}.transcript-content code{background:#f0f0f0;border-radius:4px;padding:2px 6px;font-size:.9em}.transcript-content pre{background:#f0f0f0;border-radius:8px;padding:12px 16px;font-size:.85em;line-height:1.5;overflow-x:auto}.transcript-content pre code{background:0 0;padding:0}.transcript-content table{border-collapse:collapse;width:100%;margin:0 0 .8em;font-size:.9em}.transcript-content th,.transcript-content td{border:1px solid var(--border);text-align:left;padding:8px 12px}.transcript-content th{background:var(--navy);color:#fff;font-weight:600}.transcript-content a{color:var(--teal);text-decoration:underline}.transcript-content hr{border:none;border-top:1px solid var(--border);margin:1.2em 0}.transcript-content strong{color:var(--navy)}.book-card{text-align:center}.book-card a{line-height:0;display:inline-block}.book-card img{border-radius:6px;display:block}.toc-complement{flex-shrink:0}.sidebar-footer{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}@media (width<=900px){.track-layout{grid-template-columns:1fr}.toc-rail{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-rail{flex-direction:column;gap:16px;max-height:calc(100vh - 40px);padding-right:4px;display:flex;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}