:root{--bg:#050505;--bg-soft:#0c0c0c;--panel:#101010;--line:#ffffff14;--fg:#f5f5f5;--muted:#a3a3a3;--accent:#2dd4bf;--accent-dim:#2dd4bf33}.shared-course-page,.shared-lecture-page{color:#17211c;background:radial-gradient(circle at 8% 0,#a9d1b947,#0000 34rem),#f5f4ee;min-height:100vh}.shared-header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#faf9f4e6;border-bottom:1px solid #283d3024;justify-content:space-between;align-items:center;gap:1rem;min-height:4.5rem;padding:.9rem clamp(1.25rem,4vw,4rem);display:flex}.shared-brand{color:inherit;align-items:center;gap:.65rem;font-size:1.05rem;text-decoration:none;display:inline-flex}.shared-brand svg{width:2rem;height:2rem}.shared-readonly-badge,.shared-course-meta span{color:#496153;letter-spacing:.02em;background:#ffffffad;border:1px solid #2a533a2e;border-radius:999px;font-size:.78rem;font-weight:700}.shared-readonly-badge{padding:.42rem .72rem}.shared-course-main,.shared-playback-main{width:min(1080px,100% - 2rem);margin:0 auto;padding:clamp(2rem,6vw,5rem) 0}.shared-course-main{gap:clamp(2rem,5vw,4rem);display:grid}.shared-course-hero{max-width:780px}.shared-eyebrow{color:#3d7250;letter-spacing:.13em;text-transform:uppercase;margin:0 0 .65rem;font-size:.74rem;font-weight:800}.shared-course-hero h1,.shared-status-card h1,.shared-playback-heading h1{letter-spacing:-.035em;margin:0;font-family:Georgia,Times New Roman,serif;font-weight:500}.shared-course-hero h1{max-width:14ch;font-size:clamp(2.7rem,7vw,5.6rem);line-height:.98}.shared-course-hero>p:not(.shared-eyebrow){color:#536159;max-width:62ch;margin:1.4rem 0 0;font-size:1.08rem;line-height:1.75}.shared-course-meta{flex-wrap:wrap;gap:.55rem;margin-top:1.6rem;display:flex}.shared-course-meta span{padding:.45rem .75rem}.shared-lecture-list{gap:.8rem;display:grid}.shared-section-heading{margin-bottom:.5rem}.shared-section-heading h2{margin:0;font-size:clamp(1.5rem,3vw,2.1rem)}.shared-lecture-card{min-height:5.6rem;color:inherit;background:#ffffffb8;border:1px solid #283d3021;border-radius:1rem;grid-template-columns:3rem 1fr auto;align-items:center;gap:1rem;padding:1rem 1.25rem;text-decoration:none;transition:border-color .16s,transform .16s,box-shadow .16s;display:grid;box-shadow:0 .6rem 2rem #283d300d}.shared-lecture-card:hover{border-color:#2a684159;transform:translateY(-2px);box-shadow:0 .9rem 2.4rem #283d3017}.shared-lecture-card>span:nth-child(2){gap:.28rem;display:grid}.shared-lecture-card small,.shared-lecture-number{color:#6a766f}.shared-status-card,.shared-empty{background:#ffffffb8;border:1px solid #283d3024;border-radius:1.2rem;padding:clamp(1.5rem,4vw,3rem)}.shared-status-card{max-width:650px}.shared-status-card p{color:#5d6962;line-height:1.65}.shared-playback-main{gap:1.2rem;padding-top:clamp(1.5rem,4vw,3rem);display:grid}.shared-playback-heading{justify-content:space-between;align-items:end;gap:1rem;display:flex}.shared-playback-heading a{color:#3d7250;font-weight:700;text-decoration:none}.shared-playback-heading h1{margin-top:.55rem;font-size:clamp(1.75rem,4vw,3rem)}.shared-playback-heading>span{color:#68746d;font-variant-numeric:tabular-nums}.shared-board,.shared-narration{background:#ffffffd1;border:1px solid #283d3024;border-radius:1.2rem;box-shadow:0 1rem 3rem #223a2b12}.shared-board{overflow:hidden}.shared-board-title{padding:1rem 1.25rem 0}.shared-board-title h2{margin:0}.shared-board-canvas{min-height:34rem;padding:1rem}.shared-board-canvas>*{min-height:32rem}.shared-narration{padding:1.25rem 1.5rem}.shared-narration>p:last-child{color:#35443b;margin:0;font-size:1.02rem;line-height:1.75}.shared-slide-navigation{grid-template-columns:auto 1fr auto;align-items:center;gap:1rem;display:grid}.shared-slide-navigation button{color:#26372d;min-height:2.8rem;font:inherit;cursor:pointer;background:#fff;border:1px solid #283d3033;border-radius:.75rem;padding:0 1rem;font-weight:750}.shared-slide-navigation button:disabled{opacity:.42;cursor:default}.shared-slide-dots{flex-wrap:wrap;justify-content:center;gap:.35rem;display:flex}.shared-slide-dots span{background:#bdc8c0;border-radius:999px;width:.42rem;height:.42rem}.shared-slide-dots span.is-active{background:#3d7250;width:1.25rem}@media (max-width:700px){.shared-readonly-badge{font-size:.68rem}.shared-course-main,.shared-playback-main{width:min(100% - 1.2rem,1080px)}.shared-lecture-card{grid-template-columns:2.4rem 1fr auto}.shared-playback-heading{align-items:start}.shared-board-canvas,.shared-board-canvas>*{min-height:24rem}.shared-slide-dots{display:none}.shared-slide-navigation{grid-template-columns:1fr 1fr}}*{box-sizing:border-box}html,body{background:radial-gradient(900px 420px at 100% -10%, #2dd4bf1f, transparent 70%), var(--bg);min-height:100%;color:var(--fg);margin:0;font-family:Avenir Next,Segoe UI,Helvetica Neue,sans-serif}.voice-room,.container,.room{width:min(1200px,100% - 2rem);margin:1.25rem auto 2rem}.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:1rem;box-shadow:0 16px 34px #0000005c}.room-header{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.kicker{color:var(--accent);text-transform:uppercase;letter-spacing:.09em;margin:0;font-size:.75rem;font-weight:700}h1,h2,h3,h4{letter-spacing:.01em;margin:.22rem 0}.muted{color:var(--muted);margin:.2rem 0}.voice-orb-wrap{justify-items:center;display:grid}.voice-orb{border:1px solid var(--line);width:124px;height:124px;color:var(--fg);cursor:pointer;background:#000;border-radius:999px;font-weight:700;transition:transform .16s,box-shadow .2s,border-color .2s;box-shadow:0 0 0 6px #ffffff08}.voice-orb:hover{transform:translateY(-2px)}.voice-idle{border-color:var(--line)}.voice-listening,.voice-thinking,.voice-speaking{border-color:var(--accent);box-shadow:0 0 0 6px var(--accent-dim);animation:.7s ease-in-out infinite pulse-c}.voice-listening{animation:1.35s ease-in-out infinite pulse-a}.voice-thinking{animation:.9s ease-in-out infinite pulse-b}.voice-ended{opacity:.7}@keyframes pulse-a{0%,to{box-shadow:0 0 0 6px var(--accent-dim)}50%{box-shadow:0 0 0 14px #2dd4bf0f}}@keyframes pulse-b{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes pulse-c{0%,to{transform:scale(1.01)}50%{transform:scale(1.08)}}.room-grid{grid-template-columns:1.35fr 1fr;gap:1rem;display:grid}.lecture-stage{background:radial-gradient(680px 300px at 100% 0,#2dd4bf14,#0000 72%),linear-gradient(#0d0d0d 0%,#090909 100%);margin-bottom:1rem}.stage-head{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:.85rem;display:flex}.stage-canvas{border:1px solid var(--line);background-color:#0a0a0a;background-image:linear-gradient(#0000 39px,#ffffff0a 40px),linear-gradient(90deg,#0000 39px,#ffffff08 40px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:40px 40px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;border-radius:12px;min-height:430px;padding:.4rem;position:relative;overflow:hidden}@keyframes wb-enter{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}.wb-stage{align-content:start;gap:1rem;animation:.18s ease-out wb-enter;display:grid}.wb-failure-banner{color:#ffd9d6;background:linear-gradient(#7f1d1d38,#450a0a29);border:1px solid #f8717157;border-radius:18px;gap:.35rem;padding:.95rem 1rem;display:grid}.wb-failure-banner-head{justify-content:space-between;align-items:center;gap:.75rem;display:flex}.wb-failure-banner-head p,.wb-failure-banner>p,.wb-failure-banner>strong{margin:0}.wb-failure-banner-head span{letter-spacing:.04em;text-transform:uppercase;color:#ffb4ac;font-size:.74rem}.wb-failure-banner code{color:#fff1ef;font-size:.82em}.wb-spatial-stage{background:radial-gradient(520px 280px at 100% 0,#2dd4bf0d,#0000 70%),linear-gradient(#0000 59px,#ffffff06 60px) 0 0/60px 60px,linear-gradient(90deg,#0000 59px,#ffffff05 60px) 0 0/60px 60px,#ffffff04;border:1px solid #ffffff0d;border-radius:26px;min-height:40rem;animation:.2s ease-out wb-enter;position:relative;overflow:hidden}.wb-spatial-connectors{pointer-events:none;width:100%;height:100%;position:absolute;inset:0}.wb-spatial-block{min-width:0;transition:transform .18s,filter .18s;position:absolute}.wb-spatial-block-focused{filter:drop-shadow(0 18px 28px #080f1f47);transform:translateY(-.2rem)}.wb-spatial-title .wb-heading{margin:0;padding:0;font-size:clamp(1.8rem,2.4vw,2.4rem);line-height:1.05}.wb-spatial-title .wb-heading-level-2{font-size:clamp(1.45rem,2vw,2rem)}.wb-spatial-title .wb-heading-level-3{letter-spacing:.12em;text-transform:uppercase;color:#594f3fb8;font-size:clamp(.85rem,1vw,1rem)}.wb-spatial-text .wb-note{text-align:center;height:100%;box-shadow:none;border-radius:999px;place-items:center;padding:.45rem .55rem;font-size:.74rem;line-height:1.15;display:grid}.wb-spatial-text-summary .wb-note,.wb-spatial-text-definition .wb-note{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff8c}.wb-spatial-equation .wb-equation-wrap,.wb-spatial-equation .wb-equation{height:100%}.wb-spatial-equation .wb-equation{align-items:center;display:grid}.wb-spatial-shape{pointer-events:none}.wb-shape{text-align:center;border-style:solid;place-items:center;width:100%;height:100%;padding:.85rem;display:grid}.wb-shape-rect{border-radius:18px}.wb-shape-ellipse{border-radius:999px}.wb-shape-label{color:#211d18e6;letter-spacing:-.03em;overflow-wrap:anywhere;max-width:100%;font-family:Fraunces,Georgia,serif;font-size:clamp(1rem,1.9vw,1.65rem);font-weight:700;line-height:1.15}.wb-connector path{opacity:.9}.wb-connector-label{fill:#211d18a6;letter-spacing:.08em;text-transform:uppercase;font-size:2.1px;font-weight:700}.wb-connector-label-fo{text-align:center;color:#211d18a6;letter-spacing:.08em;text-transform:uppercase;justify-content:center;align-items:center;width:100%;height:100%;font-size:2.1px;font-weight:700;display:flex;overflow:hidden}.wb-venn-block,.wb-number-line-block{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#08080899;border:1px solid #ffffff14;border-radius:22px;width:100%;height:100%;padding:.75rem}.wb-venn-title,.wb-number-line-title{color:#211d18;letter-spacing:.12em;text-transform:uppercase;margin:0 0 .5rem;font-size:.76rem;font-weight:800}.wb-venn-universe{background:#ffffff08;border:1px solid #ffffff14;border-radius:18px;height:calc(100% - 1.4rem);position:relative;overflow:hidden}.wb-venn-universe-label{color:var(--muted);font-size:.74rem;position:absolute;top:.7rem;left:.8rem}.wb-venn-region{color:var(--fg);border:2px solid;border-radius:999px;place-items:center;font-weight:800;display:grid;position:absolute}.wb-number-line-svg{width:100%;height:calc(100% - 1.4rem)}.wb-number-line-axis,.wb-number-line-tick line{stroke:#fff6;stroke-width:2px}.wb-number-line-interval{stroke:#2b5f93e6;stroke-width:8px;stroke-linecap:round}.wb-number-line-tick text,.wb-number-line-point text{fill:var(--fg);font-size:16px;font-weight:700}.wb-number-line-point circle{fill:#2b5f93e6;stroke:#f8f4ec;stroke-width:2.5px}.wb-stage-title{max-width:28rem}.wb-stage-body{grid-template-columns:minmax(0,1fr);align-items:start;gap:1rem;display:grid}.wb-visual-field{background:#ffffff04;border:1px solid #ffffff0d;border-radius:24px;align-content:center;place-items:center;gap:1rem;min-height:32rem;padding:1.5rem;display:grid}.wb-visual-field-text-only{place-items:start;min-height:12rem}.wb-visual-card{width:min(100%,980px);transition:transform .18s,filter .18s}.wb-visual-card-focused{filter:drop-shadow(0 18px 28px #080f1f38);transform:translateY(-.16rem)}.wb-visual-card-focused .wb-rendered-visual,.wb-spatial-block-focused .wb-rendered-visual{border-color:#60a5fa47;box-shadow:0 0 0 1px #60a5fa3d,0 18px 34px #02061747}.wb-visual-card-focused .wb-tree-block,.wb-spatial-block-focused .wb-tree-block,.wb-visual-card-focused .wb-plot-block,.wb-spatial-block-focused .wb-plot-block,.wb-visual-card-focused .wb-venn-block,.wb-spatial-block-focused .wb-venn-block,.wb-visual-card-focused .wb-number-line-block,.wb-spatial-block-focused .wb-number-line-block{border-color:#60a5fa42}.wb-callouts,.wb-side{align-content:start;gap:.65rem;display:grid}.wb-stage-slides{max-width:280px}.wb-visual-fallback{gap:.75rem;width:min(100%,28rem);display:grid}.wb-heading{color:var(--fg);letter-spacing:-.02em;border:0;margin:0;padding:.35rem .55rem;font-size:clamp(1.35rem,2vw,2rem);font-weight:800}.wb-note{color:var(--fg);letter-spacing:.01em;word-break:break-word;background:#ffffff73;border:1px solid #64584024;border-radius:16px;padding:.7rem .8rem;font-size:.82rem;font-weight:600;line-height:1.35}.wb-note-definition{color:var(--fg);background:#60a5fa14;border-left:3px solid #60a5fa}.wb-note-summary{background:#ffffff08}.wb-note-warning{color:var(--fg);background:#ef444417;border-left:3px solid #ef4444}.wb-note-insight{text-align:center;border:none;border-top:3px solid var(--accent);background:color-mix(in srgb, var(--accent) 7%, #ffffff80);height:100%;color:var(--fg);letter-spacing:0;justify-content:center;align-items:center;padding:1.4rem 1.8rem;font-size:clamp(1.05rem,1.6vw,1.35rem);font-weight:600;line-height:1.5;display:flex}.wb-equation-wrap{gap:.45rem;width:100%;display:grid}.wb-equation-label{color:var(--muted);letter-spacing:.12em;text-transform:uppercase;margin:0;padding-left:.25rem;font-size:.7rem;font-weight:700}.wb-equation{color:var(--fg);word-break:break-word;background:#2dd4bf0a;border:1px solid #2dd4bf1f;border-radius:22px;padding:clamp(1rem,2vw,1.5rem);font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:clamp(1.25rem,2vw,1.8rem);line-height:1.45;box-shadow:0 18px 40px #0000002e}.wb-equation .katex-display,.wb-derivation-step .katex-display,.wb-display-math .katex-display{margin:0}.wb-inline-math .katex{font-size:1em}.wb-display-math{display:block}.wb-derivation{background:#ffffff08;border:1px solid #2dd4bf1f;border-radius:20px;gap:.75rem;padding:1rem 1.1rem;display:grid}.wb-derivation header{color:var(--accent);letter-spacing:.04em;text-transform:uppercase;font-size:.84rem;font-weight:700}.wb-derivation ol{gap:.45rem;margin:0;padding-left:1.2rem;display:grid}.wb-derivation li{gap:.15rem;display:grid}.wb-derivation-step{color:var(--fg);word-break:break-word;background:#ffffff0a;border-radius:8px;padding:.4rem .55rem;font-size:.92rem;display:block;overflow-x:auto}.wb-derivation li span{color:var(--muted);font-size:.76rem}.wb-derivation-reveal{color:var(--accent);cursor:pointer;background:#2dd4bf0f;border:1px solid #2dd4bf40;border-radius:8px;align-self:start;padding:.3rem .7rem;font-size:.78rem;font-weight:600;transition:background .12s}.wb-derivation-reveal:hover{background:#2dd4bf1f}.wb-venn-svg{aspect-ratio:4/3;width:100%;display:block}.wb-venn-universe-label{fill:var(--muted);font-size:4.5px}.wb-venn-region-label{fill:var(--fg);pointer-events:none;font-size:6px;font-weight:700}.wb-venn-universe-label-fo{color:var(--muted);font-size:4.5px}.wb-venn-region-label-fo{text-align:center;width:100%;height:100%;color:var(--fg);pointer-events:none;justify-content:center;align-items:center;font-size:6px;font-weight:700;display:flex;overflow:hidden}.wb-matrix-block{background:#ffffff08;border:1px solid #ffffff14;border-radius:20px;gap:.6rem;padding:.75rem 1rem;display:grid}.wb-matrix-block header h3{color:var(--accent);letter-spacing:.04em;text-transform:uppercase;margin:0;font-size:.82rem;font-weight:700}.wb-matrix-outer{justify-content:center;display:flex}.wb-matrix-wrap{padding:.5rem 1rem;position:relative}.wb-matrix-wrap:before,.wb-matrix-wrap:after{content:"";border:2px solid #ffffff73;width:10px;position:absolute;top:0;bottom:0}.wb-matrix-wrap:before{border-right:none;border-radius:3px 0 0 3px;left:0}.wb-matrix-wrap:after{border-left:none;border-radius:0 3px 3px 0;right:0}.wb-matrix-table{border-collapse:collapse}.wb-matrix-table td,.wb-matrix-table th{text-align:center;color:var(--fg);white-space:nowrap;padding:.25rem .55rem;font-size:.9rem}.wb-matrix-table thead th{color:var(--muted);border-bottom:1px solid #ffffff14;font-size:.76rem;font-weight:700}.wb-matrix-table tbody th{color:var(--muted);border-right:1px solid #ffffff14;font-weight:600}.wb-matrix-block-table .wb-matrix-wrap:before,.wb-matrix-block-table .wb-matrix-wrap:after{display:none}.wb-matrix-block-table .wb-matrix-table td,.wb-matrix-block-table .wb-matrix-table th{white-space:normal;word-break:break-word;max-width:22rem}.wb-slide-card{border:1px solid var(--line);background:#ffffff0a;border-radius:12px;margin:0;overflow:hidden}.wb-slide-card img{object-fit:contain;border-bottom:1px solid var(--line);width:100%;height:auto;max-height:240px;display:block}.wb-slide-image-frame{aspect-ratio:4/3;width:100%;position:relative}.wb-slide-card figcaption{color:var(--muted);padding:.45rem .65rem;font-size:.78rem;line-height:1.4}.wb-tree-block{border:1px solid var(--line);background:#ffffff08;border-radius:12px;gap:.65rem;padding:.8rem .9rem;display:grid}.wb-tree-block header{justify-content:space-between;align-items:baseline;gap:1rem;display:flex}.wb-tree-block header h3{color:var(--fg);margin:0;font-size:.98rem}.wb-tree-block header span{color:var(--muted);text-transform:capitalize;font-size:.74rem}.wb-tree-placeholder{border:1px dashed var(--line-strong);background:0 0;border-radius:10px;padding:.8rem}.wb-tree-placeholder p{color:var(--muted);margin:0 0 .55rem;font-size:.82rem;font-weight:600}.wb-tree-placeholder ul{color:var(--fg);margin:0;padding-left:1rem;font-size:.9rem;line-height:1.45}.wb-tree-svg{width:100%;height:auto;overflow:visible}.wb-tree-edge path{fill:none;stroke:#fff3;stroke-width:2px}.wb-tree-edge text{fill:var(--muted);font-size:12px}.wb-tree-edge-label{width:100%;height:100%;color:var(--muted);text-align:center;justify-content:center;align-items:center;font-size:12px;display:flex;overflow:hidden}.wb-tree-node rect{fill:#fff9;stroke:#64584033;stroke-width:1.5px}.wb-tree-node text{fill:var(--fg);font-size:13px;font-weight:600}.wb-tree-node-label{width:100%;height:100%;color:var(--fg);text-align:center;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex;overflow:hidden}.wb-tree-node-sub{fill:var(--muted);color:var(--muted);font-size:11px;font-weight:500}.wb-tree-node-note{fill:var(--muted);font-size:10px;font-weight:500}.wb-tree-node-active rect{stroke:var(--accent);fill:var(--accent-soft)}.wb-tree-node-pruned rect{stroke:#ef4444;fill:#ef444414}.wb-tree-node-solution rect{stroke:#60a5fa;fill:#60a5fa14}.wb-plot-block{border:1px solid var(--line);background:#0a0a0ad1;border-radius:22px;gap:.7rem;padding:1rem 1.05rem;display:grid}.wb-plot-block header{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.wb-plot-block header h3{color:var(--fg);margin:0;font-size:.98rem}.wb-plot-block header p{color:var(--muted);margin:.18rem 0 0;font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:.84rem}.wb-plot-meta{flex-wrap:wrap;justify-content:flex-end;gap:.35rem;display:flex}.wb-plot-meta span{background:var(--accent-soft);min-height:1.8rem;color:var(--accent);letter-spacing:.02em;border-radius:999px;align-items:center;padding:.2rem .55rem;font-size:.72rem;font-weight:700;display:inline-flex}.wb-plot-svg{width:100%;height:auto;overflow:visible}.wb-rendered-visual{will-change:transform;background:radial-gradient(220px 90px at 92% 4%,#38bdf817,#0000 70%),linear-gradient(#0f172aeb,#020617db);border:1px solid #94a3b829;border-radius:22px;gap:.9rem;padding:1rem 1rem .95rem;transition:border-color .18s,box-shadow .18s,transform .18s;display:grid;box-shadow:0 16px 30px #0206173d,inset 0 1px #ffffff0a}.wb-rendered-visual header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:.65rem;display:flex}.wb-rendered-visual-meta{gap:.15rem;display:grid}.wb-rendered-visual header h3{margin:0;font-size:1.02rem;font-weight:700}.wb-rendered-visual header span{color:#9fb0c9;text-transform:uppercase;letter-spacing:.06em;font-size:.76rem}.wb-rendered-visual-badges{flex-wrap:wrap;justify-content:flex-end;gap:.35rem;display:flex}.wb-rendered-visual-badges span{color:#bfdbfe;letter-spacing:.03em;background:#0e2339b8;border:1px solid #7dd3fc4d;border-radius:999px;align-items:center;min-height:1.6rem;padding:.16rem .5rem;font-size:.7rem;font-weight:700;display:inline-flex}.wb-rendered-visual-frame{background:linear-gradient(#02061794,#0206175c),#ffffff05;border:1px solid #94a3b824;border-radius:18px;min-height:16rem;overflow:hidden;box-shadow:inset 0 0 0 1px #94a3b80f}.wb-rendered-visual-frame svg{width:100%;height:auto;display:block}.wb-rendered-visual-bayes_table,.wb-rendered-visual-comparison_table{background:linear-gradient(#111827f0,#030712e6)}.wb-rendered-visual-probability_partition,.wb-rendered-visual-set_overlap{background:linear-gradient(#0e1b26f0,#030a14e6)}.wb-plot-grid line{stroke:#ffffff14;stroke-width:1px;stroke-dasharray:4 6}.wb-plot-grid text{fill:#606060;font-size:11px;font-weight:600}.wb-plot-axis{stroke:#ffffff40;stroke-width:1.5px}.wb-plot-axis-label{fill:#a0a0a0;font-size:12px;font-weight:800}.wb-plot-curve{fill:none;stroke:#2b5f93;stroke-width:3px;stroke-linecap:round;stroke-linejoin:round;filter:drop-shadow(0 2px 6px #2b5f9333)}.wb-plot-point circle{fill:#f97316;stroke:#1a1a1a;stroke-width:2.5px}.wb-plot-point text{fill:#fb923c;font-size:12px;font-weight:700}.wb-plot-point-vertex circle{fill:#f97316;stroke:#1a1a1a}.wb-plot-point-vertex text{fill:#fb923c}.wb-plot-point-x circle{fill:#2b5f93;stroke:#f8f4ec}.wb-plot-point-x text{fill:#2b5f93}.wb-plot-point-y circle{fill:#a78bfa;stroke:#1a1a1a}.wb-plot-point-y text{fill:#a78bfa}.wb-plot-point-generic circle{fill:#60a5fa;stroke:#1a1a1a}.wb-plot-point-generic text{fill:#93c5fd}.main-column,.side-column{align-content:start;gap:1rem;display:grid}.panel-head{justify-content:space-between;align-items:center;margin-bottom:.62rem;display:flex}.state-pill{border:1px solid var(--line);text-transform:capitalize;color:var(--fg);border-radius:999px;padding:.2rem .68rem;font-size:.74rem;font-weight:700}.state-listening,.state-thinking,.state-speaking{border-color:var(--accent);color:var(--accent)}.progress-track{border:1px solid var(--line);background:#0a0a0a;border-radius:999px;width:100%;height:8px;margin-bottom:.7rem}.progress-fill{background:var(--accent);border-radius:999px;height:100%;transition:width .22s}.tag-grid{flex-wrap:wrap;gap:.44rem;margin-top:.5rem;display:flex}.tag,.chip{border:1px solid var(--line);color:var(--fg);cursor:pointer;background:#0b0b0b;border-radius:999px;padding:.24rem .64rem;font-size:.8rem}.chip:hover{border-color:var(--accent)}.parking-list{color:var(--muted);margin:.25rem 0 0;padding-left:1rem}.button-row{flex-wrap:wrap;gap:.55rem;margin-bottom:.66rem;display:flex}.btn{border:1px solid var(--line);cursor:pointer;color:var(--fg);background:#0a0a0a;border-radius:10px;padding:.55rem .88rem;font-weight:700}.btn:hover{border-color:var(--accent)}.btn-primary{border-color:var(--accent);color:var(--accent)}.btn-secondary,.btn-danger{color:var(--fg)}.btn:disabled,.chip:disabled{opacity:.45;cursor:not-allowed}.toggle{color:var(--muted);align-items:center;gap:.5rem;display:flex}.input-row{grid-template-columns:1fr auto;gap:.6rem;display:grid}input{border:1px solid var(--line);width:100%;color:var(--fg);font:inherit;background:#fff9;border-radius:10px;padding:.56rem .7rem}input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #2dd4bf2e}.transcript-scroll{gap:.55rem;max-height:380px;display:grid;overflow:auto}.bubble{border:1px solid var(--line);background:#0a0a0a;border-radius:12px;padding:.55rem .68rem}.bubble-role{text-transform:uppercase;letter-spacing:.06em;color:var(--accent);font-size:.72rem}.bubble p{margin:.2rem 0 0}.bubble-user{border-left:2px solid var(--accent)}.bubble-professor,.bubble-system{border-left:2px solid #ffffff38}.satisfaction-row{color:var(--muted);gap:.4rem;margin:.65rem 0;display:grid}.error-panel{color:var(--fg);border-color:#ffffff38;margin-bottom:1rem}@media (max-width:980px){.room-grid{grid-template-columns:1fr}.room-header{flex-direction:column;align-items:flex-start}.voice-orb-wrap{justify-items:start;width:100%}.voice-orb{width:106px;height:106px}}.voice-room-layout{grid-template-columns:minmax(0,1fr) 320px;gap:1rem;width:min(1680px,100% - 1.2rem);height:calc(100vh - 240px);min-height:720px;margin:.7rem auto;display:grid;overflow:hidden}.voice-room-layout-panel-collapsed{grid-template-columns:minmax(0,1fr) 92px}.voice-left{border:1px solid var(--line);background:#080808;border-radius:16px;grid-template-rows:auto minmax(0,1fr);min-height:0;display:grid;overflow:hidden}.voice-left-body{grid-template-columns:196px minmax(0,1fr);gap:1rem;min-height:0;padding:1rem;display:grid}.voice-left-collapsed .voice-left-body{grid-template-columns:74px minmax(0,1fr)}.voice-topbar{border-bottom:1px solid var(--line);background:#ffffff05;justify-content:space-between;align-items:center;margin:0;padding:1rem 1rem 0;display:flex}.voice-topbar-main{align-items:center;gap:.85rem;min-width:0;display:flex}.voice-outline-toggle{border:1px solid var(--line);color:var(--muted);letter-spacing:.04em;cursor:pointer;white-space:nowrap;background:0 0;border-radius:10px;padding:.4rem .72rem;font-size:.8rem;font-weight:600}.voice-outline-toggle:hover{border-color:#2dd4bf73}.voice-lecture{color:var(--fg);text-transform:capitalize;min-width:0;margin:0;font-size:.9rem}.voice-rev{color:var(--muted);letter-spacing:.05em;text-transform:uppercase;font-size:.84rem}.minimal-stage{width:100%;min-height:0}.lecture-notebook{background:0 0;border:0;border-radius:0;grid-template-rows:auto auto minmax(0,1fr);min-height:0;padding:1rem;display:grid}.lecture-stage-toolbar{border-bottom:1px solid var(--line);background:var(--panel);justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1rem;padding:.9rem 1rem .45rem;display:flex}.lecture-stage-kicker{color:var(--muted);text-transform:uppercase;letter-spacing:.12em;margin:0;font-size:.72rem;font-weight:800}.lecture-stage-toolbar h2{color:var(--fg);margin:0;font-size:1rem}.lecture-live-btn{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:0 0;border-radius:10px;padding:.5rem .85rem;font-size:.82rem;font-weight:600}.lecture-live-btn.is-live{background:var(--accent-strong);border-color:var(--accent-strong);color:#000}.lecture-slide-strip{border-bottom:1px solid var(--line);background:var(--bg-soft);gap:.65rem;margin-bottom:1rem;padding:.7rem 1rem .8rem;display:flex;overflow-x:auto}.lecture-slide-chip{text-align:left;border:1px solid var(--line);color:var(--muted);cursor:pointer;box-shadow:none;background:#ffffff0a;border-radius:12px;flex:0 0 180px;padding:.65rem .75rem}.lecture-slide-chip span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:.68rem;display:block}.lecture-slide-chip strong{margin-top:.28rem;font-size:.9rem;display:block}.lecture-slide-chip.is-active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-dim)}.lecture-stage-scroll{border:1px solid var(--line);background:#090909;border-radius:14px;min-height:0;padding:.85rem;overflow:auto}.lecture-canvas{min-height:calc(100vh - 210px);box-shadow:none;background-color:#090909;background-image:linear-gradient(#0000 39px,#ffffff08 40px),linear-gradient(90deg,#0000 39px,#ffffff05 40px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:40px 40px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;border:0;border-radius:14px;padding:1rem 1.15rem;position:relative}.lecture-scene-switcher{z-index:6;border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 88%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:999px;gap:.3rem;padding:.24rem;display:inline-flex;position:absolute;top:.8rem;right:.8rem}.lecture-scene-switcher-btn{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:.34rem .62rem;font-size:.73rem;font-weight:600}.lecture-scene-switcher-btn.is-active{background:color-mix(in srgb, var(--accent-soft) 80%, var(--panel));color:var(--fg)}.lecture-canvas-loading-layer{pointer-events:none;z-index:5;justify-content:center;display:flex;position:absolute;bottom:.9rem;left:.9rem;right:.9rem}.lecture-canvas-loading-chip{border:1px solid color-mix(in srgb, var(--accent) 30%, var(--line));background:color-mix(in srgb, var(--panel) 82%, transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);color:var(--fg);letter-spacing:.01em;border-radius:999px;align-items:center;gap:.45rem;padding:.42rem .68rem;font-size:.78rem;display:inline-flex}.lecture-canvas-loading-dot{background:var(--accent);width:.44rem;height:.44rem;box-shadow:0 0 0 0 color-mix(in srgb, var(--accent) 42%, transparent);border-radius:999px;animation:1.15s ease-in-out infinite lecture-loading-pulse}@keyframes lecture-loading-pulse{0%{opacity:.6;box-shadow:0 0 0 0 color-mix(in srgb, var(--accent) 36%, transparent);transform:scale(.86)}50%{opacity:1;box-shadow:0 0 0 7px color-mix(in srgb, var(--accent) 0%, transparent);transform:scale(1.1)}to{opacity:.6;box-shadow:0 0 0 0 color-mix(in srgb, var(--accent) 36%, transparent);transform:scale(.86)}}.lecture-empty-state{color:var(--muted);max-width:34rem;padding:2rem}.lecture-empty-state p{margin:0;line-height:1.6}.voice-right{border:1px solid var(--line);background:var(--panel);border-radius:20px;grid-template-rows:auto auto auto 1fr;gap:.5rem;min-height:0;padding:1rem;display:grid;overflow:hidden}.voice-right-collapsed{grid-template-rows:auto 1fr;padding:.65rem .5rem}.voice-outline{border-right:1px solid var(--line);background:0 0;border:0;border-radius:0;grid-template-rows:auto minmax(0,1fr);gap:.6rem;min-height:0;padding:.75rem;display:grid;overflow:hidden}.voice-outline-collapsed{padding:.8rem .5rem}.voice-outline-head{justify-content:space-between;align-items:flex-start;gap:.75rem;padding:1rem 1rem .8rem;display:flex}.voice-outline-collapsed .voice-outline-head{justify-content:center}.voice-outline-kicker{color:var(--muted);text-transform:uppercase;letter-spacing:.12em;margin:0;font-size:.68rem}.voice-outline-collapsed .voice-outline-kicker{writing-mode:vertical-rl;font-size:.62rem;transform:rotate(180deg)}.voice-outline-head h2{margin:.28rem 0 0;font-size:1rem}.voice-outline-count{border:1px solid var(--line);color:var(--muted);white-space:nowrap;background:#1823270d;border-radius:999px;padding:.24rem .58rem;font-size:.72rem}.voice-outline-list{align-content:start;gap:.5rem;min-height:0;padding:0 .8rem .8rem;display:grid;overflow:auto}.voice-outline-item{text-align:left;border:1px solid var(--line);width:100%;color:var(--fg);cursor:pointer;background:0 0;border-radius:10px;grid-template-columns:2rem minmax(0,1fr);gap:.7rem;padding:.62rem;display:grid}.voice-outline-collapsed .voice-outline-item{grid-template-columns:1fr;justify-items:center;gap:0;padding:.55rem .25rem}.voice-outline-item:hover:not(:disabled){border-color:#2dd4bf73}.voice-outline-item:disabled{opacity:.6;cursor:not-allowed}.voice-outline-item-active{background:#2dd4bf12;border-color:#2dd4bf4d}.voice-outline-item-done{opacity:.55;border-color:#ffffff24}.voice-outline-index{color:var(--muted);font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:.76rem;line-height:1.5}.voice-outline-collapsed .voice-outline-index{color:var(--fg);font-size:.8rem}.voice-outline-copy{gap:.22rem;min-width:0;display:grid}.voice-outline-copy strong{font-size:.92rem;font-weight:700}.voice-outline-copy span{color:var(--muted);font-size:.78rem;line-height:1.4}.voice-right-head{justify-content:space-between;align-items:baseline;gap:.75rem;padding:0;display:flex}.voice-right-head h2{margin:0;font-size:1rem}.voice-right-head-copy{gap:.18rem;min-width:0;display:grid}.voice-right-collapsed .voice-right-head{flex-direction:column;align-items:stretch}.voice-right-collapsed .voice-right-head h2{font-size:.86rem}.voice-state{text-transform:uppercase;letter-spacing:.07em;color:var(--muted);border:1px solid var(--line);background:0 0;font-size:.72rem}.voice-state-speaking,.voice-state-thinking,.voice-state-listening{color:var(--accent);background:#2dd4bf0f;border-color:#2dd4bf33}.siri-indicator{border:1px solid var(--line);background:#0a0a0a;border-radius:16px;width:100%;height:62px;margin:0;position:relative;overflow:hidden}.siri-core{opacity:.3;background:linear-gradient(90deg,#24d7d2 0%,#4da3ff 48%,#24d7d2 100%);position:absolute;inset:0}.siri-wave{transform-origin:50%;background:linear-gradient(90deg,#00000040,#fff6,#00000040);border-radius:999px;position:absolute;top:9px;bottom:9px}.siri-wave-1{width:76%;left:12%}.siri-wave-2{width:64%;animation-delay:80ms;left:18%}.siri-wave-3{width:50%;animation-delay:.16s;left:25%}.siri-label{color:#f5f5f5e0;letter-spacing:.08em;text-transform:uppercase;margin:0;font-size:.72rem;position:absolute;top:50%;right:14px;transform:translateY(-50%)}.voice-mini-check{color:#f5f5f5e6;margin:0;font-size:.8rem}.voice-error{color:#fca5a5;margin:0;font-size:.8rem}.voice-fallback-actions{gap:.6rem;display:flex}.voice-fallback-button{width:100%}.voice-transcript{border:1px solid var(--line);background:#090909;border-radius:16px;align-content:start;gap:.5rem;height:100%;min-height:0;margin-top:.5rem;padding:.4rem;display:grid;overflow:auto}.voice-right-collapsed-body{align-content:start;justify-items:center;gap:.7rem;min-height:0;padding-top:.4rem;display:grid}.voice-right-collapsed-body .voice-state{writing-mode:vertical-rl;letter-spacing:.12em;font-size:.66rem;transform:rotate(180deg)}.voice-empty{color:var(--muted);margin:0;font-size:.86rem}.voice-turn{border:1px solid var(--line);background:0 0;border-radius:12px;padding:.7rem .8rem}.voice-turn-user{border-left:2px solid #60a5fa}.voice-turn-partial{opacity:.72}.voice-turn-professor{border-left:2px solid var(--accent)}.voice-turn-system{border-left:2px solid var(--muted)}.voice-speaker{text-transform:uppercase;letter-spacing:.08em;color:#6a5f52;margin:0;font-size:.68rem}.voice-text{color:var(--fg);margin:.22rem 0 0;line-height:1.55}.siri-idle .siri-wave,.siri-ended .siri-wave{animation:2.1s ease-in-out infinite siri-breathe}.siri-listening .siri-wave,.siri-thinking .siri-wave{animation:1.15s ease-in-out infinite siri-listen}.siri-speaking .siri-wave{animation:.5s ease-in-out infinite siri-speak}@keyframes siri-breathe{0%,to{opacity:.32;transform:scaleY(.35)}50%{opacity:.46;transform:scaleY(.5)}}@keyframes siri-listen{0%,to{opacity:.35;transform:scaleY(.25)}50%{opacity:.72;transform:scaleY(.9)}}@keyframes siri-speak{0%,to{opacity:.3;transform:scaleY(.2)}50%{opacity:.9;transform:scaleY(1)}}.minimal-error{z-index:30;background:#0a0a0adb;border:1px solid #fff3;border-radius:10px;padding:.5rem .8rem;position:fixed;top:14px;left:50%;transform:translate(-50%)}.minimal-error p{color:#f5f5f5;margin:0;font-size:.82rem}.minimal-prompt{color:#f5f5f5d9;margin:0;font-size:.8rem;position:fixed;bottom:92px;left:50%;transform:translate(-50%)}@media (max-width:1100px){.voice-room-layout{grid-template-columns:1fr;height:auto;overflow:visible}.voice-room-layout-panel-collapsed{grid-template-columns:1fr}.voice-right{min-height:420px;overflow:visible}.voice-right-collapsed{min-height:0;padding:.8rem}.voice-left-body,.voice-left-collapsed .voice-left-body{grid-template-columns:1fr}.voice-outline{border-right:0;border-bottom:1px solid var(--line)}.voice-left-collapsed .voice-outline{display:none}.voice-right{grid-template-rows:auto auto auto auto 1fr}.voice-right-collapsed .voice-right-head{flex-direction:row;align-items:baseline}.voice-right-collapsed-body{grid-auto-flow:column;justify-items:start}.voice-right-collapsed-body .voice-state{writing-mode:initial;transform:none}.lecture-canvas{min-height:50vh}.wb-stage-body{grid-template-columns:1fr}.wb-visual-field{min-height:24rem}.wb-spatial-stage{min-height:28rem}.voice-topbar{align-items:flex-start;gap:.75rem}.voice-topbar-main{flex-direction:column;align-items:flex-start}}.landing,.course-page{width:min(1100px,100% - 2rem);margin:1.2rem auto 2rem}.landing-hero,.course-header{border:1px solid var(--line);background:radial-gradient(560px 200px at 100% 0,#2dd4bf1a,#0000 75%),#0a0a0a;border-radius:18px;justify-content:space-between;align-items:flex-start;gap:1rem;padding:1.35rem;display:flex}.landing-kicker,.course-kicker{color:var(--accent);text-transform:uppercase;letter-spacing:.11em;margin:0;font-size:.72rem;font-weight:700}.landing-hero h1,.course-header h1{margin:.35rem 0 .45rem;font-size:2rem}.landing-subtitle,.course-subtitle{color:var(--muted);max-width:70ch;margin:0}.landing-actions{margin-top:1rem}.landing-btn{border-radius:10px;padding:.62rem .95rem;font-weight:700;text-decoration:none;display:inline-block}.landing-btn-primary{border:1px solid var(--accent);color:var(--accent);background:#2dd4bf14}.landing-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem;margin-top:.95rem;display:grid}.library-grid{grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:.8rem;margin-top:.95rem;display:grid}.landing-card{border:1px solid var(--line);background:#0a0a0a;border-radius:14px;padding:.9rem}.landing-card h2{margin:0 0 .45rem;font-size:1rem}.landing-card p{color:var(--muted);margin:0;line-height:1.45}.course-pill{border:1px solid var(--line);text-transform:uppercase;letter-spacing:.08em;color:var(--fg);border-radius:999px;padding:.25rem .65rem;font-size:.73rem}.course-list{gap:.7rem;margin-top:.95rem;display:grid}.library-panel,.library-section{border:1px solid var(--line);background:#0a0a0a;border-radius:18px;margin-top:.95rem;padding:1rem}.library-panel{padding:1rem}.library-panel-muted{background:linear-gradient(#ffffff05,#fff0),#0a0a0a}.library-panel-head,.library-section-head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.library-label{color:var(--muted);text-transform:uppercase;letter-spacing:.11em;margin:0;font-size:.72rem;font-weight:700}.library-panel-head h2,.library-section-head h2{margin:.3rem 0 0;font-size:1.25rem}.library-badge,.library-count{border:1px solid var(--line);color:var(--muted);white-space:nowrap;border-radius:999px;padding:.3rem .7rem;font-size:.74rem}.library-form{gap:.75rem;margin-top:1rem;display:grid}.library-button,.folder-link{border:1px solid var(--accent);min-height:42px;color:var(--accent);background:#2dd4bf14;border-radius:11px;justify-content:center;align-items:center;padding:.6rem .9rem;font-weight:700;text-decoration:none;display:inline-flex}.library-button{cursor:pointer}.library-button:disabled{opacity:.6;cursor:not-allowed}.library-note,.library-empty{color:var(--muted);margin:.85rem 0 0;line-height:1.5}.library-inline-note{color:var(--muted);margin:-.1rem 0 0;font-size:.82rem;line-height:1.4}.auth-mode-tabs{flex-wrap:wrap;gap:.5rem;margin-top:1rem;display:flex}.auth-mode-tab{border:1px solid var(--line);color:var(--muted);font:inherit;cursor:pointer;background:#ffffff05;border-radius:999px;padding:.45rem .75rem}.auth-mode-tab-active{border-color:var(--accent);color:var(--accent);background:#2dd4bf14}.auth-form input{border:1px solid var(--line);width:100%;min-height:44px;color:var(--fg);font:inherit;background:#ffffff05;border-radius:11px;padding:.7rem .8rem}.auth-form input::placeholder{color:var(--muted)}.library-stack{gap:.7rem;margin-top:1rem;display:grid}.library-stack p{border:1px solid var(--line);color:var(--fg);background:#ffffff05;border-radius:14px;margin:0;padding:.8rem .9rem}.library-section-tight{margin-top:0}.folder-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem;margin-top:1rem;display:grid}.folder-card{background:linear-gradient(#ffffff09,#fff0),#0b0b0b;border:1px solid #ffffff17;border-radius:18px;align-content:space-between;gap:.9rem;min-height:200px;padding:1rem;display:grid;position:relative;box-shadow:0 16px 30px #00000038}.folder-card-head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.folder-tab{background:linear-gradient(#2dd4bf42,#2dd4bf1f);border:1px solid #2dd4bf38;border-bottom:0;border-radius:12px 12px 0 0;width:68px;height:18px}.folder-meta{color:var(--muted);font-size:.78rem}.folder-card h3,.lecture-row h3{margin:0;font-size:1.02rem}.folder-card p,.lecture-row p{color:var(--muted);margin:.35rem 0 0;line-height:1.45}.lecture-row-status{letter-spacing:.02em;font-size:.78rem}.course-folder-header{align-items:center}.course-folder-stats{flex-wrap:wrap;justify-content:flex-end;gap:.6rem;display:flex}.course-workspace{grid-template-columns:minmax(300px,360px) minmax(0,1fr);align-items:start;gap:.8rem;margin-top:.95rem;display:grid}.lecture-list{gap:.7rem;margin-top:1rem;display:grid}.lecture-row{border:1px solid var(--line);background:#ffffff04;border-radius:14px;justify-content:space-between;align-items:center;gap:1rem;padding:.9rem;display:flex}.lecture-row-main{align-items:flex-start;gap:.85rem;display:flex}.lecture-row-index{min-width:2.2rem;color:var(--muted);font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:.82rem}.lecture-row-actions{align-items:center;gap:.7rem;display:flex}.lecture-row-date{color:var(--muted);white-space:nowrap;font-size:.8rem}.lecture-row-pending{color:var(--muted);white-space:nowrap;font-size:.82rem}.course-item{border:1px solid var(--line);background:#0a0a0a;border-radius:14px;justify-content:space-between;align-items:center;gap:1rem;padding:.9rem;display:flex}.course-item-meta{align-items:flex-start;gap:.75rem;display:flex}.course-item-index{min-width:2.2rem;color:var(--muted);font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:.86rem}.course-item h2{margin:0;font-size:1.02rem}.course-item p{color:var(--muted);margin:.35rem 0 0}.course-item-actions{align-items:center;gap:.7rem;display:flex}.course-duration{color:var(--muted);white-space:nowrap;font-size:.82rem}.course-start{border:1px solid var(--accent);color:var(--accent);border-radius:10px;padding:.44rem .8rem;font-weight:700;text-decoration:none}@media (max-width:900px){.library-grid,.course-workspace,.folder-grid,.landing-grid{grid-template-columns:1fr}.course-item{flex-direction:column;align-items:flex-start}.course-item-actions{justify-content:space-between;width:100%}.lecture-row{flex-direction:column;align-items:flex-start}.lecture-row-actions{justify-content:space-between;width:100%}}@media (max-width:680px){.landing,.course-page{width:calc(100% - 1rem);margin:.65rem auto 1.1rem}.landing-hero h1,.course-header h1{font-size:1.45rem}.course-header{flex-direction:column}}.account-bar{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.75rem;display:flex}.account-bar-inline{margin-bottom:.6rem}.account-actions{align-items:center;gap:.75rem;display:flex}.account-email{color:var(--muted);font-size:.82rem}.sign-out-btn{border:1px solid var(--line);color:var(--muted);font:inherit;cursor:pointer;white-space:nowrap;background:0 0;border-radius:8px;padding:.32rem .68rem;font-size:.8rem;transition:border-color .14s,color .14s}.sign-out-btn:hover{color:var(--fg);border-color:#ffffff4d}.landing-hero{padding:1.75rem 1.75rem 2.25rem}.landing-hero h1{letter-spacing:-.01em;margin:.5rem 0 .6rem;font-size:clamp(1.9rem,4.5vw,2.8rem);line-height:1.08}.hero-form{margin-top:1.5rem}.hero-input-row{grid-template-columns:1fr auto;gap:.65rem;max-width:720px;display:grid}.hero-input{min-height:52px;color:var(--fg);font:inherit;background:#ffffff0a;border:1px solid #ffffff21;border-radius:13px;padding:.75rem 1rem;font-size:1rem;transition:border-color .16s,box-shadow .16s}.hero-input::placeholder{color:var(--muted)}.hero-input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 4px #2dd4bf1f}.hero-input:disabled{opacity:.55}.hero-button{background:var(--accent);color:#040d0c;min-height:52px;font:inherit;letter-spacing:.01em;cursor:pointer;white-space:nowrap;border:none;border-radius:13px;padding:.75rem 1.5rem;font-size:.95rem;font-weight:800;transition:opacity .15s,transform .12s}.hero-button:hover:not(:disabled){opacity:.88;transform:translateY(-1px)}.hero-button:disabled{opacity:.5;cursor:not-allowed}.landing-workspace{grid-template-columns:minmax(260px,300px) minmax(0,1fr);align-items:start;gap:.85rem;margin-top:.95rem;display:grid}.landing-error{margin-top:.85rem}.admin-shell{color:#e5eef7;background:radial-gradient(circle at 0 0,#f59e0b29,#0000 32%),radial-gradient(circle at 100% 0,#0ea5e91f,#0000 28%),#07111c;min-height:100vh;padding:40px 24px 64px}.admin-hero{justify-content:space-between;align-items:flex-end;gap:16px;max-width:1200px;margin:0 auto 28px;display:flex}.admin-actions{align-items:center;gap:12px;display:flex}.admin-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:1200px;margin:0 auto;display:grid}.admin-panel{background:#0f172abd;border:1px solid #94a3b82e;border-radius:24px;padding:22px;box-shadow:0 18px 48px #00000038}.admin-panel-head{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;display:flex}.admin-health{text-transform:uppercase;letter-spacing:.08em;border-radius:999px;align-items:center;padding:6px 10px;font-size:12px;display:inline-flex}.admin-health-ok{color:#86efac;background:#22c55e29}.admin-health-degraded{color:#fca5a5;background:#ef444429}.admin-stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:18px;display:grid}.admin-stat-card{background:#1e293bbf;border:1px solid #94a3b81f;border-radius:18px;padding:14px}.admin-stat-card strong{margin-bottom:6px;font-size:28px;line-height:1;display:block}.admin-stat-card span,.admin-stat-row,.admin-error-meta,.admin-kv dt,.admin-kv dd,.admin-table-row p{color:#9fb3c8}.admin-kv{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.admin-kv div{background:#0206174d;border-radius:16px;padding:12px 14px}.admin-kv dt{text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-size:12px}.admin-kv dd{color:#e5eef7;margin:0}.admin-stat-row{flex-wrap:wrap;gap:16px;margin-bottom:16px;font-size:14px;display:flex}.admin-error-list,.admin-table{flex-direction:column;gap:12px;display:flex}.admin-error-card,.admin-table-row{background:#0206175c;border:1px solid #94a3b81f;border-radius:18px;grid-template-columns:minmax(0,240px) minmax(0,1fr);gap:16px;padding:14px;display:grid}.admin-error-head{justify-content:space-between;gap:12px;margin-bottom:8px;display:flex}.admin-pre{white-space:pre-wrap;word-break:break-word;color:#c8d8e0;border:1px solid var(--line);background:#0a0a0a;border-radius:14px;margin:0;padding:.95rem;font-size:12px;line-height:1.5;overflow:auto}@media (max-width:820px){.landing-workspace{grid-template-columns:1fr}.hero-input-row{grid-template-columns:1fr;max-width:100%}.hero-button{width:100%}.admin-hero,.admin-panel-head,.admin-error-head,.admin-table-row{display:block}.admin-grid,.admin-stat-grid,.admin-kv{grid-template-columns:1fr}.admin-actions{margin-top:16px}}:root{--bg:#f7f8fa;--bg-soft:#eef1f5;--panel:#fff;--panel-strong:#f0f4f8;--panel-contrast:#1a202c;--line:#00000014;--line-strong:#00000024;--fg:#1a202c;--muted:#64748b;--accent:#1865f2;--accent-strong:#1251cc;--accent-soft:#1865f214;--accent-dim:#1865f229;--warning:#b45309;--warning-soft:#b4530914;--danger:#b91c1c;--danger-soft:#b91c1c14;--success:#1865f2;--success-soft:#1865f214;--shadow-soft:0 2px 12px #0000000f;--shadow-card:0 1px 4px #0000000f}html,body{background:var(--bg);color:var(--fg);font-family:Inter,Avenir Next,Segoe UI,Helvetica Neue,sans-serif}body.platform-body{min-height:100vh}a{color:inherit}button,input,textarea,select{font:inherit}.platform-shell{min-height:100vh}.platform-nav{z-index:40;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#fffffff7;position:sticky;top:0}.platform-nav-inner{justify-content:space-between;align-items:center;gap:1rem;width:min(1240px,100%);margin:0 auto;padding:.65rem 1.25rem;display:flex}.platform-brand-lockup,.platform-account{justify-content:flex-end;align-items:center;gap:1rem;display:flex}.platform-brand{align-items:center;gap:.8rem;text-decoration:none;display:inline-flex}.platform-brand-mark{background:var(--accent-soft);border:1px solid var(--accent-dim);width:36px;height:36px;color:var(--accent);letter-spacing:.08em;border-radius:10px;place-items:center;font-size:.82rem;font-weight:800;display:inline-grid}.platform-brand-name{color:var(--fg);font-size:.9rem;font-weight:600}.platform-brand-copy{gap:.05rem;display:grid}.platform-brand-copy strong{font-size:.9rem;font-weight:600}.platform-brand-copy span,.platform-account-label{color:var(--muted);letter-spacing:.01em;font-size:.74rem;font-weight:400}.platform-nav-links{align-items:center;gap:.1rem;display:inline-flex}.platform-nav-link{color:var(--muted);border-radius:6px;padding:.38rem .65rem;font-size:.88rem;font-weight:500;text-decoration:none;transition:background .12s,color .12s}.platform-nav-link:hover,.platform-nav-link.is-active{color:var(--fg);background:#0000000d}.platform-account-meta{text-align:right;gap:.1rem;display:grid}.platform-account-value{color:var(--fg);font-size:.9rem;font-weight:700}.platform-page{width:min(1240px,100% - 2rem);margin:1.2rem auto 2.5rem}.platform-page-wide{width:min(1440px,100% - 2rem)}.platform-stack{gap:1rem;display:grid}.platform-stack-room{gap:1.1rem}.platform-hero,.platform-card,.platform-room-hero{border:none;border-bottom:1px solid var(--line);background:0 0;border-radius:0;padding:1.45rem}.platform-hero,.platform-hero{grid-template-columns:minmax(0,1.35fr) minmax(300px,.9fr);align-items:stretch;gap:1.2rem;display:grid}.platform-hero-home,.platform-hero-course{background:0 0}.platform-hero-copy,.platform-hero-side{align-content:start;gap:1rem;display:grid}.platform-hero-tags{flex-wrap:wrap;gap:.55rem;display:flex}.platform-eyebrow,.platform-section-kicker,.platform-note-kicker,.platform-metric-label,.platform-field-label{color:var(--muted);margin:0;font-size:.75rem;font-weight:500}.platform-hero h1,.platform-room-hero h1{letter-spacing:-.01em;margin:0;font-size:clamp(1.3rem,2vw,1.7rem);line-height:1.2}.platform-room-hero h1{font-size:clamp(1.15rem,1.8vw,1.45rem)}.platform-hero-text,.platform-note-body,.platform-card-note,.platform-empty-state,.platform-inline-meta,.platform-lecture-copy p{color:var(--muted);margin:0;line-height:1.6}.platform-form{gap:.85rem;display:grid}.platform-hero-form{max-width:760px}.platform-field{gap:.45rem;display:grid}.platform-inline-form{grid-template-columns:minmax(0,1fr) auto;gap:.7rem;display:grid}.platform-input{border:1px solid var(--line);width:100%;min-height:48px;color:var(--fg);background:#ffffff9e;border-radius:12px;padding:.75rem .9rem}.platform-input::placeholder{color:var(--muted)}.platform-input:focus{border-color:var(--accent-dim);box-shadow:0 0 0 3px var(--accent-soft);outline:none}.platform-input-file{padding-block:.75rem}.platform-upload-divider{color:var(--muted);align-items:center;gap:.75rem;margin-block:.25rem;font-size:.8rem;display:flex}.platform-upload-divider:before,.platform-upload-divider:after{content:"";background:var(--border);flex:1;height:1px}.platform-primary-button,.platform-secondary-button,.platform-link-button,.platform-ghost-button{cursor:pointer;border:1px solid var(--line);min-height:36px;color:var(--muted);background:0 0;border-radius:8px;justify-content:center;align-items:center;padding:.45rem .9rem;padding-inline:.8rem;font-size:.83rem;font-weight:600;text-decoration:none;transition:opacity .13s,background .13s;display:inline-flex}.platform-primary-button:hover,.platform-secondary-button:hover,.platform-link-button:hover,.platform-ghost-button:hover{opacity:.82}.platform-primary-button{border:1px solid var(--accent-strong);color:#fff;background:var(--accent)}.platform-primary-button:disabled,.platform-secondary-button:disabled{opacity:.65;cursor:not-allowed;transform:none}.platform-primary-button-wide{width:100%}.platform-secondary-button,.platform-link-button{border:1px solid var(--line-strong);color:var(--fg);background:#0000000d}.platform-metric-card,.platform-note-card{border:1px solid var(--line);background:var(--panel-strong);border-radius:16px;padding:1rem}.platform-note-card-subtle{background:#ffffff08}.platform-metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem;margin-top:.9rem;display:grid}.platform-metric-grid article{border:1px solid var(--line);background:#0000000a;border-radius:14px;gap:.15rem;padding:.9rem;display:grid}.platform-metric-grid strong{letter-spacing:-.04em;font-size:1.5rem}.platform-metric-grid span{color:var(--muted)}.platform-metric-grid-compact strong{font-size:1.3rem}.platform-sequence{color:var(--fg);gap:.55rem;margin:.8rem 0 0;padding-left:1.1rem;display:grid}.platform-banner{border-radius:18px;margin:0;padding:.95rem 1.05rem;font-weight:700}.platform-banner-error,.platform-inline-error{color:var(--danger);background:var(--danger-soft);border-radius:12px;margin-top:.5rem;padding:.45rem .6rem;display:inline-flex}.platform-grid{gap:0;display:grid}.platform-grid>*+*{border-left:1px solid var(--line);padding-left:2rem}.platform-grid>:not(:last-child){padding-right:2rem}.platform-grid-home{grid-template-columns:minmax(300px,360px) minmax(0,1fr);align-items:start}.platform-grid-course{grid-template-columns:minmax(0,1.2fr) minmax(320px,.82fr);align-items:start}.admin-grid-platform{grid-template-columns:repeat(2,minmax(0,1fr))}.platform-card{border-top:1px solid var(--line);padding:1.5rem 0}.platform-card-emphasis{background:0 0}.platform-library-card,.platform-syllabus-card{min-width:0}.syllabus-shell{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:2rem}.syllabus-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:1.5rem;margin-bottom:2rem;padding-bottom:1.5rem;display:flex}.syllabus-title{letter-spacing:.01em;margin:.25rem 0 .35rem;font-size:clamp(1.3rem,2vw,1.7rem);font-weight:700}.syllabus-course-summary{max-width:70ch;color:var(--muted);margin:.25rem 0 .7rem;font-size:.92rem;line-height:1.55}.syllabus-subtitle{color:var(--muted);margin:0;font-size:.82rem}.syllabus-course-contract{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1.35fr) minmax(14rem,.65fr);gap:2rem;margin:0 0 2.25rem;padding:0 0 2rem;display:grid}.syllabus-course-contract ul{gap:.45rem;margin:.65rem 0 0;padding-left:1.15rem;display:grid}.syllabus-course-contract li,.syllabus-course-contract p{color:var(--fg-soft);font-size:.84rem;line-height:1.55}.syllabus-contract-label{letter-spacing:.08em;text-transform:uppercase;font-weight:750;color:var(--fg)!important;margin:0!important;font-size:.72rem!important}.syllabus-prerequisite-copy{color:var(--muted)!important}.syllabus-timeline{margin:0;padding:0;list-style:none}.syllabus-item{align-items:flex-start;gap:1.1rem;display:flex}.syllabus-module{border-top:1px solid var(--line);margin:1.4rem 0 .85rem 4.3rem;padding-top:1.1rem}.syllabus-module:first-child{border-top:0;margin-top:0;padding-top:0}.syllabus-module span{color:var(--fg);letter-spacing:.07em;text-transform:uppercase;font-size:.78rem;font-weight:750}.syllabus-module p{max-width:75ch;color:var(--muted);margin:.3rem 0 0;font-size:.8rem;line-height:1.5}.syllabus-node{flex-direction:column;flex-shrink:0;align-items:center;width:52px;display:flex}.syllabus-dot{background:color-mix(in srgb, var(--accent) 20%, var(--bg-soft));border:1.5px solid var(--accent);width:52px;height:52px;color:var(--accent);z-index:1;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:background .2s,border-color .2s;display:flex;position:relative}.syllabus-dot-num{letter-spacing:0;font-size:.95rem;font-weight:700;line-height:1}.syllabus-dot-done{background:var(--accent);border-color:var(--accent);color:#000}.syllabus-dot-active{background:color-mix(in srgb, var(--accent) 30%, var(--bg-soft));border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-dim)}.syllabus-dot-processing{background:var(--bg-soft);border-color:var(--line);color:var(--muted)}.syllabus-dot-failed{color:#ef4444;background:#ef44441f;border-color:#ef444480;font-size:1.1rem;font-weight:700}.syllabus-connector{background:var(--line);flex:1;width:2px;min-height:20px;margin:3px 0}.syllabus-content{flex:1;justify-content:space-between;align-items:flex-start;gap:1rem;min-width:0;padding:.85rem 0 1.5rem;display:flex}.syllabus-info{flex:1;min-width:0}.syllabus-lecture-title-row{flex-wrap:wrap;align-items:center;gap:.5rem;margin-bottom:.2rem;display:flex}.syllabus-lecture-title{color:var(--fg);margin-bottom:0;font-size:1rem;font-weight:500;line-height:1.4;text-decoration:none;transition:color .14s;display:block}.syllabus-generation-badge{border:1px solid var(--border);white-space:nowrap;border-radius:999px;align-items:center;gap:.35rem;padding:.24rem .45rem;font-size:.64rem;font-weight:720;line-height:1;display:inline-flex}.syllabus-generation-badge-ready{border-color:color-mix(in srgb, #16a34a 35%, var(--border));background:color-mix(in srgb, #16a34a 8%, var(--surface));color:#15803d}.syllabus-generation-badge-building{border-color:color-mix(in srgb, var(--accent) 38%, var(--border));background:color-mix(in srgb, var(--accent) 8%, var(--surface));color:var(--accent)}.syllabus-generation-badge-queued{color:var(--fg-muted)}.syllabus-generation-badge-failed{color:#dc2626;background:#ef44440f;border-color:#ef444452}a.syllabus-lecture-title:hover{color:var(--accent)}.syllabus-lecture-title-muted{color:var(--muted)}.syllabus-lecture-title-failed{color:#ef4444}.syllabus-lecture-goal{max-width:76ch;color:var(--fg-soft);margin:.15rem 0 .3rem;font-size:.84rem;line-height:1.5}.syllabus-topic-line{color:var(--muted);margin:0 0 .35rem;font-size:.72rem;line-height:1.45}.syllabus-lecture-meta{color:var(--muted);overflow-wrap:anywhere;margin:0;font-size:.78rem;line-height:1.4}.syllabus-lecture-meta-error{color:#ef4444b3}.syllabus-action{flex-shrink:0;padding-top:.1rem}.syllabus-resume-btn{background:var(--accent);color:#000;cursor:pointer;white-space:nowrap;border:none;border-radius:8px;align-items:center;padding:.45rem 1.1rem;font-family:inherit;font-size:.85rem;font-weight:600;text-decoration:none;transition:opacity .15s;display:inline-flex}.syllabus-resume-btn:hover{opacity:.88}.syllabus-open-btn{color:var(--muted);border:1px solid var(--line);cursor:pointer;white-space:nowrap;background:0 0;border-radius:8px;align-items:center;padding:.45rem 1.1rem;font-family:inherit;font-size:.85rem;text-decoration:none;transition:border-color .15s,color .15s;display:inline-flex}.syllabus-open-btn:hover{border-color:var(--accent);color:var(--accent)}.syllabus-delete-btn{width:1.75rem;height:1.75rem;color:var(--muted);cursor:pointer;opacity:0;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;padding:0;font-size:.75rem;transition:opacity .15s,color .15s,background .15s;display:inline-flex}.syllabus-item:hover .syllabus-delete-btn{opacity:1}.syllabus-delete-btn:hover{color:#dc2626;background:#dc26261a}.syllabus-delete-btn:disabled{opacity:.4;cursor:not-allowed}.platform-library-card{border-top:1px solid var(--line)}.platform-section-head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.platform-section-head h2{letter-spacing:-.01em;margin:.2rem 0 0;font-size:.95rem;font-weight:600}.platform-badge,.platform-status-chip{white-space:nowrap;border:1px solid #0000;border-radius:5px;justify-content:center;align-items:center;min-height:22px;padding:.18rem .55rem;font-size:.73rem;font-weight:500;display:inline-flex}.platform-badge,.platform-status-chip-neutral{color:var(--muted);border-color:var(--line);background:#0000000a}.platform-status-chip-success{background:var(--success-soft);color:var(--success);border-color:#2dd4bf33}.platform-status-chip-warning{background:var(--warning-soft);color:var(--warning);border-color:#f59e0b33}.platform-status-chip-danger{background:var(--danger-soft);color:var(--danger);border-color:#ef444433}.platform-status-chip-accent{background:var(--accent-soft);color:var(--accent);border-color:#2dd4bf33}.platform-card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:.9rem;display:grid}.platform-course-card{border:1px solid var(--line);background:var(--panel);border-radius:18px;gap:.8rem;padding:1rem;display:grid}.platform-course-card-muted{opacity:.55;pointer-events:none}.platform-course-card-top,.platform-course-card-footer,.platform-lecture-head,.platform-lecture-actions,.platform-room-hero,.platform-room-hero-meta{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.8rem;display:flex}.platform-course-card-serial,.platform-lecture-index{color:var(--muted);min-width:2.2rem;padding-top:.15rem;font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:.74rem}.platform-course-card-body h3,.platform-lecture-head h3{letter-spacing:-.02em;margin:0;font-size:1.04rem;font-weight:650}.platform-course-card-body p{color:var(--muted);margin:.25rem 0 0;line-height:1.5}.library-card-stats{flex-wrap:wrap;gap:.45rem;margin-top:.75rem;display:flex}.platform-inline-meta{font-size:.84rem}.platform-breadcrumb{color:var(--muted);align-items:center;gap:.4rem;margin-bottom:.45rem;font-size:.83rem;text-decoration:none;display:inline-flex}.platform-lecture-add{border-top:1px solid var(--line);margin-top:1.25rem;padding-top:1rem}.platform-library-manual{border-top:1px solid var(--line);margin-top:1.5rem;padding-top:1rem}.platform-inline-form-sm .platform-input{min-height:unset;padding:.35rem .6rem;font-size:.83rem}.platform-lecture-list{gap:0;margin-top:.5rem;display:grid}.platform-lecture-card{border-top:1px solid var(--line);grid-template-columns:minmax(0,1fr) auto;gap:1rem;padding:.85rem 0;display:grid}.platform-lecture-card-main{gap:.9rem;min-width:0;display:flex}.platform-lecture-copy{min-width:0}.platform-lecture-actions{align-items:flex-start}.admin-hero-platform h1{max-width:14ch}.admin-hero-meta{justify-content:flex-start}.admin-hero-actions{flex-wrap:wrap;gap:.75rem;display:flex}.admin-panel-platform{gap:1rem;display:grid}.admin-metric-grid{margin-top:0}.admin-kv-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin:0;display:grid}.admin-kv-grid div{border:1px solid var(--line);background:#ffffff0a;border-radius:14px;padding:.9rem}.admin-kv-grid dt{color:var(--muted);text-transform:uppercase;letter-spacing:.1em;font-size:.74rem;font-weight:800}.admin-kv-grid dd{color:var(--fg);margin:.25rem 0 0;font-weight:700;line-height:1.5}.admin-stat-chips{flex-wrap:wrap;gap:.6rem;display:flex}.admin-feed-list,.admin-list-table{gap:.85rem;display:grid}.admin-feed-card,.admin-list-row{border:1px solid var(--line);background:#ffffff0a;border-radius:14px;grid-template-columns:minmax(220px,.8fr) minmax(0,1.2fr);align-items:start;gap:.75rem;padding:1rem;display:grid}.admin-feed-head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.admin-list-row-button{text-align:left;cursor:pointer;background:0 0;grid-template-columns:1fr;justify-items:start;width:100%}.admin-list-row-button.is-active{background:#2b5f9314;border-color:#2b5f9357}.admin-starter-row{flex-wrap:wrap;gap:.65rem;display:flex}.admin-form-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem;display:grid}.admin-checkbox-row{color:var(--fg);align-items:center;gap:.6rem;font-weight:600;display:inline-flex}.admin-textarea{border:1px solid var(--line);width:100%;min-height:220px;color:var(--fg);resize:vertical;background:#ffffff0a;border-radius:14px;padding:.9rem 1rem;line-height:1.55}.admin-textarea:focus{border-color:#2dd4bf59;outline:none;box-shadow:0 0 0 3px #2dd4bf14}.admin-ops-shell{color:#e8edf2}.admin-ops-hero,.admin-ops-panel,.admin-ops-strip{background:radial-gradient(360px 180px at 100% 0,#2163eb1f,#0000 72%),linear-gradient(#11161cfa,#0b0f13fa);border:1px solid #8292a62e;border-radius:24px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.75rem;padding:.85rem;display:grid;box-shadow:0 18px 42px #03050859}.admin-ops-hero{justify-content:space-between;align-items:flex-start;gap:1rem;padding:1.35rem;display:flex}.admin-ops-hero-copy{gap:.65rem;display:grid}.admin-ops-kicker,.admin-ops-panel-head p,.admin-ops-metric span{color:#8a97a8;letter-spacing:.14em;text-transform:uppercase;margin:0;font-size:.72rem;font-weight:800}.admin-ops-hero h1,.admin-ops-panel-head h2{color:#f5f8fb;letter-spacing:-.04em;margin:0}.admin-ops-hero h1{font-size:clamp(2rem,4vw,3.2rem)}.admin-ops-text{color:#9eacbc;max-width:58ch;margin:0;line-height:1.6}.admin-ops-actions{flex-wrap:wrap;gap:.7rem;display:flex}.admin-ops-button{color:#f8fbff;cursor:pointer;background:linear-gradient(#1d4ed8,#173ea9);border:1px solid #358bff4d;border-radius:14px;min-height:46px;padding:.7rem 1rem;font-weight:800;text-decoration:none}.admin-ops-button-secondary{color:#d9e0e8;background:#ffffff0a;border-color:#8292a638}.admin-ops-alert,.admin-ops-empty{color:#9eacbc;margin:0}.admin-ops-alert{color:#fecaca;background:#7f1d1d47;border:1px solid #f871712e;border-radius:18px;padding:.9rem 1rem}.admin-ops-metric{background:#ffffff08;border:1px solid #8292a61f;border-radius:18px;gap:.3rem;padding:.9rem;display:grid}.admin-ops-metric strong{color:#f5f8fb;letter-spacing:-.04em;font-size:1.5rem}.admin-ops-tone{text-transform:uppercase}.admin-ops-tone-success{color:#6ee7b7}.admin-ops-tone-warning{color:#fbbf24}.admin-ops-tone-danger{color:#f87171}.admin-ops-grid{gap:1rem;display:grid}.admin-ops-grid-primary{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}.admin-ops-grid-secondary{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-ops-panel{gap:.9rem;padding:1rem;display:grid}.admin-ops-panel-urgent{background:radial-gradient(420px 200px at 100% 0,#dc26261f,#0000 72%),linear-gradient(#11161cfa,#0b0f13fa);border-color:#ef444447}.admin-ops-panel-head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.admin-ops-panel-head span,.admin-ops-row p,.admin-ops-event p{color:#9eacbc}.admin-ops-list,.admin-ops-timeline{gap:.75rem;display:grid}.admin-ops-row,.admin-ops-event{background:#ffffff09;border:1px solid #8292a61f;border-radius:18px;padding:.9rem}.admin-ops-row strong,.admin-ops-event strong{color:#f5f8fb}.admin-ops-row p,.admin-ops-event p{margin:.35rem 0 0;line-height:1.5}.admin-ops-row-head{justify-content:space-between;align-items:center;gap:.75rem;display:flex}.admin-ops-chip-row{flex-wrap:wrap;gap:.55rem;display:flex}.admin-ops-chip-row-metrics{margin-bottom:.8rem}.admin-ops-chip{color:#c9d3df;text-transform:uppercase;letter-spacing:.08em;background:#94a3b81f;border:1px solid #94a3b829;border-radius:999px;justify-content:center;align-items:center;min-height:28px;padding:.25rem .55rem;font-size:.72rem;font-weight:800;display:inline-flex}.admin-ops-chip.is-busy{color:#93c5fd;background:#3b82f62e;border-color:#3b82f642}.admin-ops-chip.is-danger{color:#fca5a5;background:#ef444429;border-color:#ef44443d}.admin-ops-chip.is-warn{color:#fcd34d;background:#f59e0b29;border-color:#f59e0b3d}.admin-ops-pre{color:#dbe7f3;white-space:pre-wrap;word-break:break-word;background:#0f172ad1;border:1px solid #8292a624;border-radius:14px;margin:.55rem 0 0;padding:.8rem}.admin-ops-stack-tight{gap:.3rem;margin-top:.55rem;display:grid}.admin-ops-stack-tight p{color:#c9d3df;margin:0;line-height:1.5}.admin-ops-stack-tight strong{color:#f8fafc;margin-right:.35rem}.admin-ops-latency-table-wrap{border:1px solid #8a9ac42e;border-radius:18px;max-height:24rem;overflow:auto}.admin-ops-latency-table{border-collapse:collapse;width:100%;min-width:42rem}.admin-ops-latency-table th,.admin-ops-latency-table td{text-align:left;border-bottom:1px solid #8a9ac424;padding:.8rem .9rem;font-size:.88rem}.admin-ops-latency-table th{z-index:1;color:#adb8d6c7;text-transform:uppercase;letter-spacing:.08em;background:#0e121cf5;font-size:.72rem;position:sticky;top:0}.admin-ops-latency-table td{color:#ecf1fae6}.admin-ops-latency-table tbody tr:last-child td{border-bottom:none}.voice-left,.voice-outline-toggle:hover{color:var(--fg);border-color:#2dd4bf4d}.voice-lecture,.voice-outline-head h2{letter-spacing:-.02em;font-size:1.05rem}.voice-outline-group{gap:.6rem}.voice-outline-group-title{color:var(--fg)}.voice-outline-group-summary{color:var(--muted)}.voice-outline-item:hover:not(:disabled){background:#ffffff08;border-color:#2dd4bf40}.voice-outline-copy strong{color:var(--fg)}.voice-outline-copy span{color:var(--muted)}.lecture-stage-toolbar h2{color:var(--fg);margin-top:.28rem}.lecture-stage-meta{color:var(--muted);margin:.28rem 0 0;font-size:.88rem}.lecture-live-btn.is-live{color:var(--accent);background:#2dd4bf12;border-color:#2dd4bf4d}.lecture-stage-empty{border:1px dashed var(--line-strong);color:var(--muted);background:0 0;border-radius:12px;margin:0 0 1rem;padding:.8rem .9rem}.lecture-slide-chip strong{color:var(--fg)}.lecture-slide-chip.is-active{color:var(--accent);background:#2dd4bf12;border-color:#2dd4bf4d}.voice-right-head h2{font-size:1.1rem}.voice-status-row{flex-wrap:wrap;gap:.45rem;margin-top:.35rem;display:flex}@media (max-width:1180px){.platform-hero,.platform-grid-home,.platform-grid-course,.admin-grid-platform,.admin-ops-grid-primary,.admin-ops-grid-secondary,.platform-card-grid{grid-template-columns:1fr}.admin-ops-strip{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:920px){.platform-nav{padding-inline:.75rem}.platform-nav-inner,.platform-brand-lockup,.platform-account{flex-direction:column;align-items:stretch}.platform-account-meta{text-align:left}.platform-inline-form,.platform-lecture-card,.admin-list-row,.admin-form-grid{grid-template-columns:1fr}.platform-course-card-footer,.platform-room-hero,.platform-room-hero-meta{align-items:flex-start}.platform-room-hero{flex-direction:column}.platform-lecture-actions{justify-content:flex-start}.admin-kv-grid{grid-template-columns:1fr}.admin-ops-hero,.admin-ops-row-head{flex-direction:column;align-items:flex-start}.admin-ops-strip{grid-template-columns:1fr}}.platform-page-full-bleed{width:calc(100% - 1.25rem);margin:.75rem auto 1.25rem}.platform-stack-room-immersive{gap:0;min-height:calc(100vh - 4.5rem)}.immersive-room{color:#211d18;background:linear-gradient(#f9f5ecfa,#f4eee2fa),#f4eee2;border:1px solid #6458402e;border-radius:26px;grid-template-rows:auto minmax(0,1fr);height:calc(100vh - 4.5rem);min-height:calc(100vh - 4.5rem);max-height:calc(100vh - 4.5rem);padding:.3rem .6rem .6rem;font-family:Iowan Old Style,Palatino Linotype,Book Antiqua,Georgia,serif;display:grid;position:relative;overflow:hidden}.immersive-room-header{z-index:5;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:linear-gradient(#f7f3e9f5,#f7f3e9d6);border-bottom:1px solid #64584024;margin-bottom:.18rem;padding:.18rem .05rem .14rem;position:relative}.immersive-room-header-copy{gap:.85rem;display:grid}.immersive-room-breadcrumb{width:fit-content}.immersive-room-title-row{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.immersive-room-kicker{color:var(--muted);text-transform:uppercase;letter-spacing:.16em;margin:0 0 .3rem;font-size:.7rem;font-weight:800}.immersive-room-title-row h1{letter-spacing:-.04em;margin:0;font-size:clamp(1.6rem,3vw,2.5rem)}.immersive-room-status{flex-wrap:wrap;justify-content:flex-end;gap:.45rem;display:flex}.immersive-room-progress-row{justify-content:space-between;align-items:flex-end;gap:1rem;display:flex}.immersive-room-progress-copy{gap:.18rem;min-width:0;display:grid}.immersive-room-progress-copy p,.immersive-room-progress-copy span{color:var(--muted);margin:0}.immersive-room-progress-copy p{text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;font-weight:800}.immersive-room-progress-copy strong{color:var(--fg);font-size:1rem}.immersive-room-progress-copy span{font-size:.88rem;line-height:1.45}.immersive-room-metrics{color:var(--muted);flex-wrap:wrap;justify-content:flex-end;gap:.5rem;font-size:.8rem;display:none}.immersive-room-metrics span{background:#ffffff0a;border:1px solid #ffffff14;border-radius:999px;padding:.34rem .62rem}.immersive-room-progress-track{background:#64584029;border-radius:0;height:2px;overflow:hidden}.immersive-room-progress-track span{border-radius:inherit;background:linear-gradient(90deg,#2dd4bf 0%,#60a5fa 100%);height:100%;transition:width .22s;display:block}.immersive-room-timeline{gap:.35rem;padding-bottom:.2rem;display:flex;overflow-x:auto}.immersive-room-timeline-node{text-align:left;color:#211d18;cursor:pointer;box-shadow:none;background:#ffffff42;border:1px solid #64584024;border-radius:0;flex:0 0 200px;gap:.24rem;min-height:auto;padding:.42rem .58rem;transition:border-color .14s,background .14s,transform .14s;display:grid}.immersive-room-timeline-node:hover:not(:disabled){background:#2b5f930d;border-color:#2b5f9361;transform:translateY(-1px)}.immersive-room-timeline-node:disabled{opacity:.55;cursor:not-allowed}.immersive-room-timeline-node span{color:var(--muted);letter-spacing:.08em;font-family:SFMono-Regular,Menlo,Monaco,Courier New,monospace;font-size:.7rem}.immersive-room-timeline-node strong{font-size:.95rem;line-height:1.3}.immersive-room-timeline-node-active{background:#2b5f9314;border-color:#2b5f93}.immersive-room-timeline-node-done{background:#ffffff05}.immersive-room-next-lecture{border-top:1px solid var(--line);color:var(--accent);margin-top:1rem;padding:.6rem 0;font-size:.83rem;font-style:italic;text-decoration:none;display:block}.immersive-room-next-lecture:hover{text-decoration:underline}.immersive-room-topic-goal{color:var(--muted);margin:0;font-size:.88rem;line-height:1.45}.topic-dots{flex-wrap:wrap;align-items:center;gap:.45rem;display:flex}.topic-dot{background:#ffffff2e;border-radius:999px;flex-shrink:0;width:7px;height:7px;transition:width .18s,background .18s}.topic-dot-active{background:var(--accent);width:18px}.topic-dot-done{background:#2dd4bf61}.topic-nav-bar{-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);white-space:nowrap;background:#080808bf;border:1px solid #ffffff1a;border-radius:999px;align-items:center;gap:.5rem;width:100%;max-width:100%;margin-top:.55rem;padding:.45rem .5rem;display:flex;position:relative;box-shadow:0 8px 32px #00000073}.topic-nav-btn{color:var(--fg);cursor:pointer;background:#ffffff0f;border:1px solid #ffffff1a;border-radius:999px;padding:.42rem 1.1rem;font-size:.85rem;font-weight:600;transition:background .14s,border-color .14s,opacity .14s}.topic-nav-btn:hover:not(:disabled){background:#2dd4bf24;border-color:#2dd4bf59}.topic-nav-btn:disabled{opacity:.3;cursor:not-allowed}.topic-nav-btn-next:not(:disabled){color:var(--accent);background:#2dd4bf1f;border-color:#2dd4bf47}.topic-nav-btn-next:hover:not(:disabled){background:#2dd4bf38}.topic-nav-label{text-align:center;min-width:9rem;max-width:22rem;padding:0 .5rem;overflow:hidden}.topic-nav-label strong{text-overflow:ellipsis;white-space:nowrap;font-size:.88rem;line-height:1.3;display:block;overflow:hidden}.topic-nav-loading{color:var(--muted);letter-spacing:.06em;font-size:.82rem}.immersive-room-stage{height:100%;min-height:0;position:relative}.immersive-room .lecture-notebook{background:radial-gradient(700px 320px at 100% 0,#2dd4bf14,#0000 70%),linear-gradient(#070707 0%,#040404 100%);height:100%;position:relative}.immersive-room .lecture-stage-toolbar{z-index:3;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#080808b8;border:1px solid #ffffff14;border-radius:18px;max-width:min(420px,100% - 2rem);margin:0;padding:.9rem 1rem;position:absolute;top:1rem;left:1rem}.immersive-room-panel-collapsed .lecture-stage-toolbar{max-width:min(520px,100% - 8rem)}.immersive-room .lecture-stage-kicker{color:#f5f5f599}.immersive-room .lecture-stage-toolbar h2{font-size:1.05rem}.immersive-room .lecture-stage-meta{margin:.24rem 0 0}.immersive-room .lecture-slide-strip,.immersive-room .lecture-stage-empty{z-index:3;position:absolute;bottom:1rem;left:1rem;right:1rem}.immersive-room .lecture-slide-strip{background:0 0;border:0;margin:0;padding:0}.immersive-room .lecture-slide-chip{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#080808c2}.immersive-room .lecture-stage-empty{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#080808b8;border-style:solid;border-color:#ffffff14;max-width:420px;margin:0}.immersive-room .lecture-stage-scroll{background:0 0;border:0;border-radius:0;height:100%;min-height:0;padding:1rem;overflow:auto}.immersive-room .lecture-canvas{background-color:#050505;background-image:linear-gradient(#0000 47px,#ffffff08 48px),linear-gradient(90deg,#0000 47px,#ffffff06 48px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:48px 48px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;border:0;border-radius:0;height:100%;min-height:0;padding:6rem 1.25rem}.immersive-room>.voice-right{z-index:4;-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);background:#0a0a0a94;border:1px solid #ffffff1a;border-radius:22px;width:min(380px,100% - 2rem);position:absolute;top:10.75rem;bottom:1rem;right:1rem;box-shadow:0 24px 70px #00000059}.immersive-room>.voice-right-collapsed{width:88px;height:280px;padding:.8rem .55rem;top:auto}.immersive-room .voice-right-head{align-items:flex-start}.immersive-room .voice-right-head-copy{gap:.3rem}.immersive-room .voice-right-head h2{font-size:1rem}.immersive-room .voice-outline-toggle{background:#ffffff0d}.immersive-room .siri-indicator,.immersive-room .voice-transcript,.immersive-room .voice-turn{background:#00000038}.immersive-room .voice-transcript{scrollbar-width:thin}@media (max-width:1180px){.immersive-room{min-height:calc(100vh - 104px)}.immersive-room>.voice-right{width:min(340px,100% - 2rem);top:12.5rem}}@media (max-width:920px){.platform-page-full-bleed{width:calc(100% - .75rem);margin:.5rem auto 1rem}.immersive-room{grid-template-rows:auto auto auto;min-height:auto}.immersive-room-header,.immersive-room .lecture-stage-scroll{padding-inline:.8rem}.immersive-room-title-row,.immersive-room-progress-row{flex-direction:column;align-items:flex-start}.immersive-room-status,.immersive-room-metrics{justify-content:flex-start}.immersive-room .lecture-stage-toolbar,.immersive-room .lecture-slide-strip,.immersive-room .lecture-stage-empty{max-width:none;position:static}.immersive-room .lecture-stage-toolbar{margin-bottom:.8rem}.immersive-room .lecture-slide-strip{margin-top:.8rem}.immersive-room .lecture-canvas{min-height:56vh;padding:1.1rem .8rem 1.25rem}.immersive-room>.voice-right,.immersive-room>.voice-right-collapsed{width:auto;height:auto;min-height:340px;margin:.8rem;position:static}}.immersive-room-breadcrumb,.immersive-room-kicker,.immersive-room-progress-copy p,.immersive-room-progress-copy span,.immersive-room-metrics,.immersive-room-timeline-node span,.lecture-stage-kicker,.lecture-stage-meta,.voice-state,.immersive-room-title-row h1,.immersive-room-progress-copy strong,.lecture-stage-toolbar h2,.voice-right-head h2,.voice-text,.wb-heading,.wb-derivation header,.wb-plot-block header h3,.wb-venn-title,.immersive-room-status .platform-status-chip,.immersive-room-metrics span{color:#51473c;box-shadow:none;background:0 0;border-color:#6458402e;border-radius:0}.immersive-room-progress-track span{background:#2b5f93;border-radius:0}.immersive-room .immersive-room-topic-goal{color:#6a5f52}.immersive-room .immersive-room-meta-line{color:#6a5f52;letter-spacing:.08em;text-transform:uppercase;margin:0;font-size:.74rem}.immersive-room .topic-dot{background:#64584033}.immersive-room .topic-dot-active{background:#2b5f93}.immersive-room .topic-dot-done{background:#2b5f9352}.immersive-room .topic-nav-bar{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f7f3e9eb;border-color:#64584033;box-shadow:0 6px 22px #0000001a}.immersive-room .topic-nav-btn{color:#211d18;background:0 0;border-color:#64584038;border-radius:0}.immersive-room .topic-nav-btn:hover:not(:disabled){background:#2b5f9314;border-color:#2b5f934d}.immersive-room .topic-nav-btn-next:not(:disabled){color:#2b5f93;background:#2b5f9312;border-color:#2b5f934d}.immersive-room .topic-nav-btn-next:hover:not(:disabled){background:#2b5f9324}.immersive-room .topic-nav-label strong{color:#211d18}.immersive-room .topic-nav-loading{color:#6a5f52}.immersive-room .topic-nav-bar{border-radius:0}.immersive-room .lecture-notebook{background:linear-gradient(#f7f3e9c7,#f4eee2e0),#f4eee2}.immersive-room .lecture-stage-toolbar{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:none;background:#f7f3e9eb;border:1px solid #64584029;border-radius:0}.immersive-room .lecture-live-btn,.immersive-room .voice-outline-toggle{color:#51473c;background:0 0;border-color:#6458403d;border-radius:0}.lecture-stage-actions{align-items:center;gap:.45rem;display:inline-flex}.immersive-room .lecture-live-btn.is-live{color:#2b5f93;background:#2b5f9314;border-color:#2b5f936b}.immersive-room .lecture-slide-chip{color:#51473c;background:#f7f3e9e6;border-color:#64584024;border-radius:0}.immersive-room .lecture-slide-chip.is-active{color:#211d18;background:#2b5f9314;border-color:#2b5f93}.immersive-room .lecture-stage-empty{color:#6a5f52;background:#f7f3e9eb;border-style:solid;border-color:#64584024;border-radius:0}.immersive-room .lecture-stage-scroll{background:0 0}.immersive-room .lecture-canvas{color:#211d18;background-color:#f6f1e8;background-image:linear-gradient(#0000 39px,#71655514 40px),linear-gradient(90deg,#0000 39px,#7165550a 40px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:40px 40px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box}.immersive-room>.voice-right{box-shadow:none;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#211d18;background:#faf7f0e6;border:1px solid #64584029;border-radius:0}.immersive-room .voice-right-head{border-bottom:1px solid #6458401f;padding-bottom:.65rem}.immersive-room .voice-status-row{gap:.25rem}.immersive-room .voice-soundwave{justify-content:center;align-items:flex-end;gap:.22rem;width:100%;height:2.2rem;margin:.4rem 0 .5rem;display:flex}.immersive-room .voice-soundwave-bar{transform-origin:50% 100%;background:#6a5f526b;border-radius:999px;width:3px;height:2.2rem;transition:transform .25s;transform:scaleY(.14)}.immersive-room .voice-soundwave-speaking .voice-soundwave-bar{background:#2b5f93e6;animation:.82s ease-in-out infinite voice-wave-speaking}.immersive-room .voice-soundwave-listening .voice-soundwave-bar{background:#2b5f9394;animation:1.2s ease-in-out infinite voice-wave-listening}.immersive-room .voice-soundwave-thinking .voice-soundwave-bar{background:#6a5f528c;animation:1.4s ease-in-out infinite voice-wave-thinking}.immersive-room .voice-soundwave-idle .voice-soundwave-bar,.immersive-room .voice-soundwave-ended .voice-soundwave-bar{background:#6a5f5238;transform:scaleY(.14)}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(2){animation-delay:.12s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(3){animation-delay:.24s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(4){animation-delay:.36s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(5){animation-delay:.48s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(6){animation-delay:.6s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(7){animation-delay:.72s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(8){animation-delay:.84s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(9){animation-delay:.96s}.immersive-room .voice-soundwave .voice-soundwave-bar:nth-child(10){animation-delay:1.08s}.immersive-room .ptt-bar{border-top:1px solid #6458401a;gap:.4rem;padding-top:.65rem}.immersive-room .ptt-btn{color:#2b5f93d1;letter-spacing:.02em;background:#2b5f930d;border-color:#2b5f9347;border-radius:10px;padding:.65rem 1rem;font-size:.78rem;font-weight:500}.immersive-room .ptt-btn:hover{color:#2b5f93f2;background:#2b5f9314;border-color:#2b5f9380}.immersive-room .ptt-btn-active{color:#2b5f93;background:#2b5f931f;border-color:#2b5f93a6}.immersive-room .ptt-btn-icon{background:#2b5f93a6;width:9px;height:9px}.immersive-room .ptt-btn-active .ptt-btn-icon{background:#2b5f93}.immersive-room .ptt-hint{color:#6a5f52a6;letter-spacing:.03em;font-size:.66rem}.immersive-room .ptt-hint kbd{color:#6a5f52cc;border-color:#64584052;border-radius:4px;padding:.1em .35em}.immersive-room .voice-state{letter-spacing:.12em;background:0 0;border:0;padding:0;font-size:.64rem}.immersive-room .voice-state-speaking,.immersive-room .voice-state-thinking,.immersive-room .voice-state-listening{color:#2b5f93}.immersive-room .siri-indicator{background:#f5f0e6d9;border-color:#64584024;border-radius:0}.immersive-room .siri-label{color:#51473c}.immersive-room .voice-transcript{background:0 0;border:0;border-radius:0;gap:0;margin-top:.15rem;padding:0}.immersive-room .voice-turn{background:0 0;border:0;border-bottom:1px solid #6458401a;border-radius:0;padding:.68rem 0}.immersive-room .voice-turn-user,.immersive-room .voice-turn-professor,.immersive-room .voice-turn-system{border-left:0}.immersive-room .voice-speaker{letter-spacing:.14em;margin-bottom:.22rem;font-size:.66rem}.immersive-room .voice-text{margin:0;font-size:.98rem;line-height:1.6}.immersive-room .wb-note,.immersive-room .wb-equation,.immersive-room .wb-derivation,.immersive-room .wb-plot-block,.immersive-room .wb-venn-block,.immersive-room .wb-number-line-block{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border-color:#64584024;border-radius:0}.immersive-room .wb-heading{letter-spacing:-.03em;font-size:clamp(2rem,2.8vw,2.7rem)}.immersive-room .wb-spatial-text .wb-note{text-transform:uppercase;letter-spacing:.08em;background:0 0;border:0;padding:.35rem .15rem;font-size:.82rem}.immersive-room .wb-callouts .wb-note,.immersive-room .wb-visual-fallback .wb-note{text-transform:none;letter-spacing:.01em;background:#f7f3e98c;border:1px solid #64584024;padding:.55rem .75rem;font-size:.88rem;line-height:1.5}.immersive-room .wb-callouts .wb-note-definition,.immersive-room .wb-visual-fallback .wb-note-definition{background:#2b5f9312;border-left:3px solid #2b5f93}.immersive-room .wb-callouts .wb-note-warning,.immersive-room .wb-visual-fallback .wb-note-warning{background:#b4530912;border-left:3px solid #b45309}.immersive-room .wb-equation{background:#ffffff47;border-left:3px solid #2b5f93;padding:1rem 1.1rem;font-size:clamp(1.25rem,2vw,1.75rem)}.immersive-room .wb-equation-label,.immersive-room .wb-venn-title,.immersive-room .wb-number-line-title,.immersive-room .wb-plot-block header p,.immersive-room .wb-plot-meta span{color:#6a5f52}.immersive-room .wb-plot-meta span{background:0 0;border:1px solid #64584024;border-radius:0}.immersive-room .wb-spatial-stage{background-color:#f8f4ec;background-image:linear-gradient(#0000 31px,#71655514 32px),none;background-position:0 0,0 0;background-repeat:repeat,repeat;background-size:100% 32px;background-attachment:scroll,scroll;background-origin:padding-box,padding-box;background-clip:border-box,border-box;border-color:#6458401f;border-radius:0}.immersive-room .wb-spatial-title .wb-heading{font-size:clamp(2rem,2.6vw,2.8rem)}.immersive-room .wb-spatial-title .wb-heading-level-2{font-size:clamp(1.55rem,2vw,2.1rem)}.immersive-room .wb-spatial-title .wb-heading-level-3{font-size:clamp(.8rem,.95vw,.95rem)}.immersive-room .wb-shape-rect,.immersive-room .wb-venn-universe{border-radius:0}.immersive-room .wb-shape-ellipse,.immersive-room .wb-venn-region{border-radius:999px}.immersive-room .wb-connector-label,.immersive-room .wb-venn-universe-label{fill:#6a5f52;color:#6a5f52}.immersive-room .wb-number-line-axis,.immersive-room .wb-number-line-tick line{stroke:#211d187a}.immersive-room .wb-number-line-interval{stroke:#2b5f93}.immersive-room .wb-number-line-point circle{fill:#2b5f93;stroke:#f8f4ec}.immersive-room-progress-row,.immersive-room .topic-dots{gap:.38rem}.immersive-room .topic-dot{width:6px;height:6px}.immersive-room .topic-dot-active{width:16px}.immersive-room-content{grid-template-columns:minmax(0,1fr) minmax(290px,340px);align-items:stretch;gap:1rem;height:100%;min-height:0;display:grid}.immersive-room .lecture-notebook,.immersive-room .lecture-stage-scroll,.immersive-room .lecture-canvas{height:100%;min-height:0}.immersive-room .lecture-notebook{box-shadow:none;background:0 0;border:0}.immersive-room .lecture-stage-toolbar,.immersive-room .lecture-stage-empty{display:none}.immersive-room .lecture-stage-scroll{padding:0;overflow:hidden}.immersive-room .lecture-canvas{padding:.45rem .8rem 5.4rem;overflow:hidden}.immersive-room .topic-nav-bar{justify-content:space-between;max-width:760px;min-height:0;margin-top:.22rem;padding:.18rem .22rem}.immersive-room-panel-collapsed .topic-nav-bar{max-width:100%}.immersive-room .topic-nav-label{flex:1;max-width:none}.immersive-room .topic-nav-btn{padding:.22rem .6rem;font-size:.74rem}.immersive-room .immersive-room-kicker{margin-bottom:.08rem;font-size:.58rem}.immersive-room .immersive-room-title-row h1{font-size:clamp(1.05rem,1.95vw,1.55rem);line-height:1.03}.immersive-room .immersive-room-topic-goal{margin:.08rem 0 0;font-size:.72rem;line-height:1.22}.immersive-room .immersive-room-meta-line{margin:.02rem 0 0;font-size:.62rem}.immersive-room .immersive-room-header-copy{gap:.22rem}.immersive-room .immersive-room-breadcrumb{margin-bottom:.02rem;font-size:.7rem}.immersive-room .immersive-room-title-row{gap:.35rem}.immersive-room .immersive-room-progress-track{height:4px}.immersive-room .topic-nav-label strong{font-size:.84rem;line-height:1.1}@media (max-width:1024px){.immersive-room .topic-nav-bar{width:100%;max-width:100%}}@keyframes voice-wave-speaking{0%,to{transform:scaleY(.22)}20%{transform:scaleY(.92)}40%{transform:scaleY(.48)}60%{transform:scaleY(.78)}80%{transform:scaleY(.35)}}@keyframes voice-wave-listening{0%,to{transform:scaleY(.18)}50%{transform:scaleY(.55)}}@keyframes voice-wave-thinking{0%,to{transform:scaleY(.14)}50%{transform:scaleY(.32)}}.immersive-room>.voice-right,.immersive-room-content>.voice-right{z-index:auto;width:100%;height:100%;min-height:0;max-height:none;position:relative;top:auto;bottom:auto;right:auto}.immersive-room-panel-collapsed>.voice-right,.immersive-room-panel-collapsed .immersive-room-content>.voice-right{height:100%}@media (max-width:1024px){.platform-stack-room-immersive{min-height:0}.immersive-room{height:auto;min-height:auto;max-height:none}.immersive-room-content{grid-template-columns:1fr;height:auto}.immersive-room>.voice-right,.immersive-room-panel-collapsed>.voice-right,.immersive-room-content>.voice-right,.immersive-room-panel-collapsed .immersive-room-content>.voice-right{width:100%;height:auto;margin-top:.75rem;position:static;top:auto;bottom:auto;right:auto}.immersive-room-stage{height:auto;min-height:58vh}}.immersive-room .voice-transcript{overscroll-behavior:contain;min-height:0;max-height:100%;overflow-y:auto}.gen-step-list{flex-direction:column;gap:.5rem;margin:1rem 0 0;padding:0;list-style:none;display:flex}.gen-step{align-items:center;gap:.5rem;font-size:.85rem;transition:color .3s;display:flex}.gen-step-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px;transition:background .3s}.gen-step-done{color:var(--muted)}.gen-step-done .gen-step-dot{background:var(--muted);opacity:.5}.gen-step-active{color:var(--fg);font-weight:500}.gen-step-active .gen-step-dot{background:var(--accent);animation:1.2s ease-in-out infinite gen-pulse}.gen-step-pending{color:var(--muted);opacity:.5}.gen-step-pending .gen-step-dot{background:var(--muted)}@keyframes gen-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.7)}}.gen-building{color:var(--muted);align-items:center;gap:.4rem;font-size:.85rem;display:inline-flex}.gen-building-dot{background:var(--accent);border-radius:50%;width:6px;height:6px;animation:1.4s ease-in-out infinite gen-pulse}.gen-progress-shell{flex-direction:column;gap:1rem;display:flex}.gen-ready-panel{border:1.5px solid color-mix(in srgb, var(--accent) 35%, transparent);background:color-mix(in srgb, var(--accent) 6%, transparent);border-radius:8px;flex-direction:column;align-items:flex-start;gap:.75rem;padding:1rem 1.1rem;animation:.4s gen-fade-in;display:flex}@keyframes gen-fade-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.gen-ready-label{color:var(--fg);margin:0;font-size:.92rem;font-weight:600}.gen-ready-cta{text-align:center;align-self:stretch}.gen-course-banner{border:1px solid var(--border);border-radius:8px;align-items:flex-start;gap:.85rem;padding:1rem 1.1rem;display:flex}.gen-course-banner-building{background:color-mix(in srgb, var(--accent) 5%, var(--surface));border-color:color-mix(in srgb, var(--accent) 30%, transparent)}.gen-course-banner-ready{background:color-mix(in srgb, #22c55e 5%, var(--surface));border-color:#22c55e4d}.gen-course-banner-dot{flex-shrink:0;margin-top:.35rem}.gen-course-banner-check{color:#22c55e;flex-shrink:0;margin-top:.1rem;font-size:1rem}.gen-course-banner-title{color:var(--fg);margin:0 0 .2rem;font-size:.88rem;font-weight:600}.gen-course-banner-sub{color:var(--fg-muted);margin:0;font-size:.8rem}.course-generation-progress{border:1px solid color-mix(in srgb, var(--accent) 28%, var(--border));background:linear-gradient(135deg, color-mix(in srgb, var(--accent) 8%, var(--surface)), var(--surface) 65%);border-radius:12px;gap:1rem;padding:1.25rem 1.35rem;display:grid;box-shadow:0 12px 32px #192a5814}.course-generation-progress-active{border-color:color-mix(in srgb, var(--accent) 52%, var(--border));box-shadow:0 14px 38px color-mix(in srgb, var(--accent) 13%, transparent)}.course-generation-progress-head{justify-content:space-between;align-items:flex-start;gap:1.5rem;display:flex}.course-generation-eyebrow{color:var(--accent);letter-spacing:.09em;text-transform:uppercase;margin:0 0 .3rem;font-size:.68rem;font-weight:780}.course-generation-progress h2{color:var(--fg);letter-spacing:-.025em;margin:0;font-size:clamp(1.15rem,2vw,1.5rem)}.course-generation-progress-head p:last-child{max-width:72ch;color:var(--fg-muted);margin:.4rem 0 0;font-size:.82rem;line-height:1.5}.course-generation-total{color:var(--fg);letter-spacing:-.035em;white-space:nowrap;flex-shrink:0;font-size:1.45rem}.course-generation-total span{color:var(--fg-muted);letter-spacing:0;font-size:.72rem;font-weight:650}.course-generation-track{background:color-mix(in srgb, var(--accent) 12%, var(--bg-soft));border-radius:999px;width:100%;height:10px;overflow:hidden}.course-generation-track>span{border-radius:inherit;background:linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 66%, #8b5cf6));height:100%;transition:width .32s;display:block}.course-generation-track>span.is-building{background-size:180% 100%;animation:1.6s linear infinite course-generation-sweep}@keyframes course-generation-sweep{0%{background-position:100% 0}to{background-position:-80% 0}}.course-generation-counts{flex-wrap:wrap;gap:.55rem;display:flex}.course-generation-counts>span{border:1px solid var(--border);background:color-mix(in srgb, var(--surface) 85%, transparent);color:var(--fg-muted);border-radius:999px;padding:.35rem .55rem;font-size:.7rem}.course-generation-counts strong{color:var(--fg)}.course-generation-counts .is-error,.course-generation-counts .is-error strong{color:#dc2626}@media (max-width:700px){.course-generation-progress-head{flex-direction:column;gap:.8rem}}.platform-page-head{padding-bottom:1.15rem}.library-hero{gap:1.4rem;padding:1.4rem 0 .6rem;display:grid}.library-hero-copy{max-width:860px}.library-eyebrow,.library-action-kicker{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 .45rem;font-size:.74rem;font-weight:600}.library-hero-title{letter-spacing:-.03em;text-wrap:balance;max-width:14ch;margin:0;font-size:clamp(2rem,5vw,3.6rem);line-height:1.05}.library-hero-text{max-width:64ch;color:var(--muted);margin:1rem 0 0;font-size:1rem;line-height:1.7}.library-metric-row{grid-template-columns:repeat(4,minmax(0,1fr));gap:.85rem;display:grid}.library-metric-card{border:1px solid var(--line);background:linear-gradient(#ffffff14,#ffffff08),#0000000f;border-radius:18px;gap:.35rem;padding:1rem 1.05rem;display:grid}.library-metric-card strong{letter-spacing:-.04em;font-size:clamp(1.2rem,2vw,1.7rem)}.library-metric-label{color:var(--muted);text-transform:uppercase;letter-spacing:.12em;font-size:.76rem}.library-action-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:1rem;display:grid}.platform-page-title{color:var(--fg);margin:0 0 .9rem;font-size:1rem;font-weight:600}.platform-generate-form{max-width:620px}.platform-breadcrumb-row{color:var(--muted);align-items:center;gap:.45rem;margin-bottom:.6rem;font-size:.82rem;display:flex}.platform-breadcrumb-row a{color:var(--muted);text-decoration:none}.platform-breadcrumb-row a:hover{color:var(--fg)}.platform-page-head-row{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:1rem;display:flex}.platform-course-status-line{color:var(--muted);flex-wrap:wrap;align-items:center;gap:.85rem;font-size:.83rem;display:flex}.platform-generate-cta{justify-content:space-between;align-items:flex-end;gap:1rem;min-height:100%;display:flex}.platform-generate-cta h2{letter-spacing:-.02em;margin:0 0 .3rem;font-size:1.2rem}.library-action-card,.library-upload-card{border:1px solid var(--line);background:var(--panel);border-radius:22px;gap:.9rem;padding:1.15rem;display:grid}.library-action-card-course{background:radial-gradient(circle at top left, #1865f212, transparent 55%), var(--panel)}.library-action-card-lecture{background:radial-gradient(circle at top right, #fbbf241f, transparent 50%), var(--panel)}.library-action-card-course .library-action-kicker{color:color-mix(in srgb, var(--accent) 72%, white)}.library-action-card-lecture .library-action-kicker{color:#f6c768}.library-action-button-course,.library-action-button-lecture{color:#1e1506;background:linear-gradient(135deg,#d8a13b,#f0c96f);border-color:#ffe09580;align-self:flex-end;box-shadow:0 16px 30px #6d4c0f2e}.library-action-button-lecture:hover{background:linear-gradient(135deg,#e1ae49,#f5d88b)}.library-action-copy{max-width:42ch}.library-upload-form{gap:.75rem}.library-section-headline{justify-content:space-between;align-items:flex-end;gap:1rem;padding-top:.9rem;padding-bottom:.65rem;display:flex}.generate-page-shell{max-width:860px;margin-inline:auto;padding:1.15rem}.generate-page-head{margin-bottom:1rem}.generate-page-head h1{margin:0 0 .45rem;font-size:clamp(1.2rem,2vw,1.55rem);line-height:1.2}.generate-course-form{gap:.9rem}.generate-layout{grid-template-columns:minmax(0,1.6fr) minmax(280px,1fr);align-items:start;gap:1rem;display:grid}.generate-layout-solo{grid-template-columns:minmax(0,1fr);max-width:680px}.generate-layout-hidden{display:none}.upload-level-row{flex-wrap:wrap;gap:.4rem;display:flex}.upload-level-btn{border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 90%, transparent);color:var(--muted);cursor:pointer;white-space:nowrap;border-radius:8px;flex:1 1 0;padding:.4rem .5rem;font-size:.74rem;font-weight:600;transition:border-color .12s,background .12s,color .12s}.upload-level-btn:hover:not(:disabled){border-color:color-mix(in srgb, var(--accent) 35%, var(--line));color:var(--fg)}.upload-level-btn.is-active{border-color:color-mix(in srgb, var(--accent) 52%, var(--line));background:color-mix(in srgb, var(--accent-soft) 80%, var(--panel));color:var(--fg)}.upload-level-btn:disabled{opacity:.6;cursor:not-allowed}.generate-form-section{border:1px solid var(--line);background:var(--panel);border-radius:14px;gap:.75rem;padding:.9rem;display:grid}.generate-form-section h2{margin:0;font-size:.95rem;font-weight:600}.generate-mode-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;display:grid}.generate-mode-card{text-align:left;border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 92%, transparent);color:var(--fg);cursor:pointer;border-radius:14px;gap:.3rem;padding:.85rem .9rem;transition:border-color .14s,background .14s,transform .14s,box-shadow .14s;display:grid}.generate-mode-card strong{font-size:.92rem}.generate-mode-card span{color:var(--muted);font-size:.8rem;line-height:1.45}.generate-mode-card:hover:not(:disabled){border-color:color-mix(in srgb, var(--accent) 35%, var(--line));transform:translateY(-1px);box-shadow:0 12px 24px #0a122014}.generate-mode-card.is-active{border-color:color-mix(in srgb, var(--accent) 52%, var(--line));background:color-mix(in srgb, var(--accent-soft) 82%, var(--panel));box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent)}.generate-mode-card:disabled{cursor:not-allowed;opacity:.72}.generate-textarea{resize:vertical;min-height:90px}.generate-topic-actions{justify-content:flex-start;display:flex}.generate-level-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem;display:grid}.generate-level-card{text-align:left;border:1px solid var(--line);background:color-mix(in srgb, var(--panel) 92%, transparent);color:var(--fg);cursor:pointer;border-radius:14px;gap:.25rem;padding:.8rem .9rem;transition:border-color .14s,background .14s,transform .14s,box-shadow .14s;display:grid}.generate-level-card strong{font-size:.88rem}.generate-level-card span{color:var(--muted);font-size:.76rem;line-height:1.4}.generate-level-card:hover:not(:disabled){border-color:color-mix(in srgb, var(--accent) 35%, var(--line));transform:translateY(-1px);box-shadow:0 12px 24px #0a122014}.generate-level-card.is-active{border-color:color-mix(in srgb, var(--accent) 52%, var(--line));background:color-mix(in srgb, var(--accent-soft) 82%, var(--panel));box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent)}.generate-level-card:disabled{cursor:not-allowed;opacity:.72}.platform-field-optional{color:var(--muted);font-size:.82em;font-style:normal;font-weight:400}.generate-form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem;display:grid}.generate-side-panel{gap:.8rem;display:grid}.generate-side-card{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:.9rem}.generate-side-card h3{margin:0 0 .35rem;font-size:.88rem}.generate-preview-text{border:1px solid var(--line);white-space:pre-wrap;max-height:220px;color:var(--fg);background:#00000014;border-radius:10px;margin:.75rem 0 .45rem;padding:.65rem .75rem;font-family:JetBrains Mono,Fira Code,IBM Plex Mono,monospace;font-size:.74rem;line-height:1.45;overflow:auto}.generate-char-count{color:var(--muted);margin:0;font-size:.74rem}.generate-next-list{color:var(--muted);margin:.45rem 0 0;padding-left:1rem;font-size:.82rem;line-height:1.55}@media (max-width:780px){.library-hero-title{max-width:none}.library-metric-row{grid-template-columns:repeat(2,minmax(0,1fr))}.library-action-grid{grid-template-columns:minmax(0,1fr)}.platform-generate-cta{flex-direction:column;align-items:flex-start}.platform-card-grid,.generate-layout,.generate-form-grid,.generate-mode-grid{grid-template-columns:minmax(0,1fr)}}.topic-nav-mic-hint{color:#2b5f93;opacity:.9;justify-content:center;align-items:center;gap:.3rem;margin-top:.2rem;font-size:.68rem;font-weight:500;display:flex}.topic-nav-mic-dot{background:currentColor;border-radius:50%;flex-shrink:0;width:5px;height:5px;animation:1.8s ease-in-out infinite mic-dot-pulse}@keyframes mic-dot-pulse{0%,to{opacity:1}50%{opacity:.2}}.library-overview{flex-direction:column;gap:1rem;padding:0 0 .6rem;display:flex}.library-overview-copy{flex-direction:column;gap:.45rem;display:flex}.library-overview-title{color:var(--fg);margin:0;font-size:clamp(1.8rem,4vw,2.4rem);font-weight:600;line-height:1.08}.library-overview-text{max-width:42rem;color:var(--muted);margin:0;font-size:1rem;line-height:1.65}.library-overview-chips{flex-wrap:wrap;gap:.55rem;display:flex}.library-overview-chip{border:1px solid color-mix(in srgb, var(--accent) 10%, var(--line));background:color-mix(in srgb, var(--accent) 7%, white);min-height:2rem;color:var(--accent);letter-spacing:.01em;border-radius:999px;align-items:center;padding:.42rem .9rem;font-size:.78rem;font-weight:700;display:inline-flex}.library-overview-chip-subtle{background:var(--panel-2);color:var(--muted-strong)}.library-list-section{padding:0}.library-list-section-head{align-items:baseline;gap:.6rem;margin-bottom:1.75rem;display:flex}.library-list-heading{color:var(--fg);margin:0;font-size:clamp(1.3rem,3vw,1.7rem);font-weight:700}.library-list-group{margin-bottom:2rem}.library-list-group-heading{letter-spacing:.08em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line);align-items:center;gap:.4rem;margin:0 0 .6rem;padding-bottom:.55rem;font-size:.68rem;font-weight:700;display:flex}.library-list-group-heading-muted{opacity:.6}.library-list-group-icon{text-transform:none;letter-spacing:0;font-size:.85rem;line-height:1}.library-list-empty{color:var(--muted);margin:.25rem 0 .5rem;font-size:.82rem}.library-list-row{border-bottom:1px solid var(--line);align-items:center;gap:1rem;padding:.85rem 0;display:flex}.library-list-row:last-child{border-bottom:none}.library-skeleton-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:1rem;padding:1rem 0;display:flex}.library-skeleton-row:last-child{border-bottom:none}.library-skeleton-row-info{flex-direction:column;flex:1;gap:.45rem;min-width:0;display:flex}.library-skeleton-title,.library-skeleton-meta,.library-skeleton-badge{background:color-mix(in srgb, var(--panel-2) 88%, white);border-radius:999px;flex-shrink:0;width:4.8rem;height:2rem;display:block}.library-skeleton-title{width:min(22rem,52%);height:.95rem}.library-skeleton-meta{background:color-mix(in srgb, var(--panel-2) 78%, white);width:min(16rem,34%);height:.72rem}.library-list-row-info{flex:1;min-width:0}.library-list-row-title{color:var(--fg);white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:.95rem;font-weight:500;overflow:hidden}.library-list-row-meta{color:var(--muted);margin:.2rem 0 0;font-size:.78rem}.library-list-row-action{background:var(--accent);color:#fff;border-radius:6px;flex-shrink:0;padding:.35rem .9rem;font-size:.8rem;font-weight:600;text-decoration:none;transition:background .15s;display:inline-block}.library-list-row-action:hover{background:var(--accent-strong)}.library-list-row-actions{flex-shrink:0;align-items:center;gap:.5rem;display:flex}.library-list-row-delete{width:1.75rem;height:1.75rem;color:var(--muted);cursor:pointer;opacity:0;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;padding:0;font-size:.75rem;transition:opacity .15s,color .15s,background .15s;display:inline-flex}.library-list-row:hover .library-list-row-delete{opacity:1}.library-list-row-delete:hover{color:#dc2626;background:#dc26261a}.library-new-section{border-top:1px solid var(--line);margin-top:.5rem;padding-top:1.5rem}.library-new-heading{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin:0 0 .85rem;font-size:.78rem;font-weight:600}.library-new-bar{flex-wrap:wrap;gap:.5rem;display:flex}.library-new-btn{color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent-dim);cursor:pointer;border-radius:20px;padding:.45rem 1rem;font-size:.82rem;font-weight:500;text-decoration:none;transition:background .15s,border-color .15s;display:inline-block}.library-new-btn:hover,.library-new-btn.is-active{background:var(--accent-dim);border-color:var(--accent)}.library-new-upload{max-width:480px;margin-top:1.25rem}.auth-shell{background:var(--bg);justify-content:center;align-items:center;min-height:100dvh;display:flex}.auth-card{background:var(--panel);border:1px solid var(--line);width:100%;max-width:420px;box-shadow:var(--shadow-soft);border-radius:12px;padding:2.5rem 2rem}.auth-card h1{color:var(--fg);margin:.35rem 0 .5rem;font-size:clamp(1.3rem,3vw,1.6rem);font-weight:700}.auth-card .landing-subtitle{color:var(--muted);margin:0 0 .5rem;font-size:.9rem}.auth-form{flex-direction:column;gap:.65rem;margin-top:1rem;display:flex}.auth-form input{border:1px solid var(--line-strong);background:var(--bg);width:100%;color:var(--fg);box-sizing:border-box;border-radius:7px;outline:none;padding:.6rem .85rem;font-size:.9rem;transition:border-color .15s}.auth-form input:focus{border-color:var(--accent)}.auth-brand{letter-spacing:.05em;color:var(--accent);margin:0 0 .6rem;font-size:.85rem;font-weight:700}.auth-heading{color:var(--fg);margin:0 0 .35rem;font-size:clamp(1.4rem,4vw,1.8rem);font-weight:700;line-height:1.2}.auth-subheading{color:var(--muted);margin:0 0 1.5rem;font-size:.88rem;line-height:1.55}.auth-google-btn{border:1px solid var(--line-strong);background:var(--panel);width:100%;color:var(--fg);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:.6rem;padding:.7rem 1rem;font-size:.9rem;font-weight:500;transition:background .15s,border-color .15s;display:flex}.auth-google-btn:hover{background:var(--bg-soft);border-color:var(--muted)}.auth-google-btn:disabled{opacity:.6;cursor:not-allowed}.auth-card-lightweight{text-align:center;max-width:390px;padding:2.75rem 2.25rem}.auth-card-lightweight .auth-brand{margin-bottom:.85rem}.auth-card-lightweight .auth-subheading{max-width:19rem;margin-left:auto;margin-right:auto}.auth-card-lightweight .auth-google-btn{background:var(--fg);border-color:var(--fg);min-height:2.9rem;color:var(--panel);font-weight:650}.auth-card-lightweight .auth-google-btn:hover{background:color-mix(in srgb, var(--fg) 90%, var(--panel));border-color:color-mix(in srgb, var(--fg) 90%, var(--panel))}.auth-assurance{color:var(--muted);margin:1rem 0 0;font-size:.74rem;line-height:1.5}.auth-divider{color:var(--muted);align-items:center;gap:.75rem;margin:1.25rem 0;font-size:.75rem;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--line);flex:1;height:1px}.auth-toggle{border:1px solid var(--line);border-radius:8px;margin-bottom:1rem;display:flex;overflow:hidden}.auth-toggle-btn{color:var(--muted);cursor:pointer;background:0 0;border:none;flex:1;padding:.5rem;font-size:.82rem;font-weight:500;transition:background .15s,color .15s}.auth-toggle-btn.is-active{background:var(--accent-soft);color:var(--accent)}.auth-submit-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:7px;width:100%;padding:.65rem;font-size:.9rem;font-weight:600;transition:background .15s}.auth-submit-btn:hover{background:var(--accent-strong)}.auth-submit-btn:disabled{opacity:.6;cursor:not-allowed}.auth-magic-link{text-align:center;color:var(--muted);cursor:pointer;text-underline-offset:2px;background:0 0;border:none;margin-top:.5rem;font-size:.78rem;text-decoration:underline;display:block}.auth-magic-link:hover{color:var(--fg)}.auth-message{background:color-mix(in srgb, #22c55e 10%, var(--panel));color:#166534;border:1px solid #22c55e40;border-radius:7px;margin:.85rem 0 0;padding:.65rem .85rem;font-size:.82rem}.auth-error{background:color-mix(in srgb, #ef4444 8%, var(--panel));color:#b91c1c;border:1px solid #ef444433;border-radius:7px;margin:.85rem 0 0;padding:.65rem .85rem;font-size:.82rem}.auth-loading{text-align:center;color:var(--muted);padding:1rem 0;font-size:.9rem}.lecture-complete-banner{background:color-mix(in srgb, var(--accent) 6%, var(--panel));border-bottom:1px solid var(--accent-dim);align-items:flex-start;gap:1.5rem;padding:1.1rem 1.5rem;animation:.35s hint-slide-in;display:flex}.lecture-complete-banner-copy{flex:1;min-width:0}.lecture-complete-banner-label{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 .2rem;font-size:.68rem;font-weight:700}.lecture-complete-banner-title{color:var(--fg);margin:0 0 .3rem;font-size:.95rem;font-weight:600}.lecture-complete-banner-sub{color:var(--muted);margin:0;font-size:.8rem}.lecture-complete-banner-actions{flex-wrap:wrap;flex-shrink:0;justify-content:flex-end;align-items:center;gap:.5rem;display:flex}.lecture-complete-cta{background:var(--accent);color:#fff;white-space:nowrap;border-radius:6px;padding:.4rem .9rem;font-size:.8rem;font-weight:600;text-decoration:none;transition:background .15s;display:inline-block}.lecture-complete-cta:hover{background:var(--accent-strong)}.lecture-complete-cta-secondary{color:var(--accent);border:1px solid var(--accent-dim);background:0 0}.lecture-complete-cta-secondary:hover{background:var(--accent-soft)}.lecture-complete-dismiss{color:var(--muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;padding:.25rem;font-size:.78rem}.lecture-complete-dismiss:hover{color:var(--fg)}@media (max-width:680px){.lecture-complete-banner{flex-direction:column;gap:.85rem}.lecture-complete-banner-actions{justify-content:flex-start}}.ptt-bar{flex-direction:column;flex-shrink:0;align-items:center;gap:.35rem;padding:.75rem 1rem .5rem;display:flex}.ptt-btn{border:1.5px solid var(--border);background:var(--surface);width:100%;color:var(--fg-muted);cursor:pointer;-webkit-user-select:none;user-select:none;touch-action:none;border-radius:8px;align-items:center;gap:.5rem;padding:.65rem 1rem;font-size:.82rem;font-weight:500;transition:background .1s,border-color .1s,color .1s;display:flex}.ptt-btn:hover{border-color:var(--accent);color:var(--fg)}.ptt-btn-active{background:color-mix(in srgb, var(--accent) 12%, transparent);border-color:var(--accent);color:var(--accent)}.ptt-btn-icon{background:currentColor;border-radius:50%;flex-shrink:0;width:8px;height:8px;transition:transform .15s}.ptt-btn-active .ptt-btn-icon{animation:.8s ease-in-out infinite ptt-pulse}@keyframes ptt-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.5)}}.ptt-hint{color:var(--fg-muted);opacity:.6;margin:0;font-size:.7rem}.ptt-hint kbd{opacity:.8;border:1px solid;border-radius:3px;padding:.1em .3em;font-family:inherit;font-size:.68rem}.onboarding-shell{color:#1a2032;background:radial-gradient(520px 220px at 90% -40%,#8d5fe71a,#0000 70%),#f5f6f8;justify-content:center;align-items:center;min-height:100dvh;padding:1.5rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;display:flex}.onboarding-card{background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;width:100%;max-width:620px;overflow:hidden;box-shadow:0 10px 24px #1829590f}.onboarding-header{justify-content:space-between;align-items:center;padding:1.35rem 1.75rem 0;display:flex}.onboarding-brand{color:#1a2032;letter-spacing:-.01em;margin:0;font-size:1.02rem;font-weight:700}.onboarding-skip{color:#5f6577;cursor:pointer;background:#fff;border:1px solid #bbc2dd;border-radius:.65rem;padding:.28rem .62rem;font-size:.78rem}.onboarding-skip:hover{color:var(--fg)}.onboarding-progress{gap:.45rem;padding:1rem 1.75rem 0;display:flex}.onboarding-dot{background:#ccd2e0;border-radius:999px;width:28px;height:4px;transition:background .2s}.onboarding-body-area{padding:1.8rem 1.75rem 2rem}.onboarding-step-label{text-transform:uppercase;letter-spacing:.08em;color:#5f6577;margin:0 0 .5rem;font-size:.72rem;font-weight:700}.onboarding-heading{color:#1a2032;letter-spacing:-.024em;margin:0 0 .75rem;font-size:clamp(1.45rem,3.4vw,1.95rem);font-weight:700;line-height:1.25}.onboarding-body{color:#5f6577;max-width:44ch;margin:0 0 1.5rem;font-size:.95rem;line-height:1.55}.onboarding-next-btn{color:#fff;cursor:pointer;background:linear-gradient(140deg,#2644d9,#7547d1);border:1px solid #0000;border-radius:.75rem;min-height:2.7rem;padding:.65rem 1.5rem;font-size:.9rem;font-weight:600;transition:transform .14s,box-shadow .14s;display:inline-block;box-shadow:0 8px 18px #2f40da3b}.onboarding-next-btn:hover{background:var(--accent-strong)}.onboarding-action-list{flex-direction:column;gap:.5rem;margin-top:.5rem;display:flex}.onboarding-action-row{color:var(--fg);background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;align-items:center;gap:1rem;padding:1rem 1.1rem;text-decoration:none;transition:border-color .15s,background .15s;display:flex}.onboarding-action-row:hover{border-color:var(--accent);background:var(--accent-soft)}.onboarding-action-row-copy{flex:1;min-width:0}.onboarding-action-row-copy strong{margin-bottom:.2rem;font-size:.9rem;font-weight:600;display:block}.onboarding-action-row-copy span{color:var(--muted);font-size:.8rem}.onboarding-action-row-arrow{color:var(--muted);flex-shrink:0;font-size:1rem}.onboarding-action-row:hover .onboarding-action-row-arrow{color:var(--accent)}button.onboarding-action-row{text-align:left;cursor:pointer;background:0 0;border:none;width:100%;font-family:inherit}button.onboarding-action-row:disabled{opacity:.5;cursor:not-allowed}.ob-name-field{flex-direction:column;gap:.5rem;margin-bottom:1.5rem;display:flex}.ob-name-label{color:var(--muted);font-size:.85rem}.ob-optional{color:var(--muted);font-size:.8rem;font-style:italic}.ob-name-input{color:#1a2032;background:#fff;border:1px solid #ccd2e0;border-radius:.75rem;outline:none;width:100%;padding:.72rem 1rem;font-family:inherit;font-size:1rem;transition:border-color .15s}.ob-name-input:focus{border-color:var(--accent)}.ob-option-grid{grid-template-columns:1fr 1fr;gap:.6rem;margin-bottom:1.5rem;display:grid}.ob-option-card{background:var(--bg-soft);border:1px solid var(--line);text-align:left;cursor:pointer;border-radius:12px;flex-direction:column;gap:.25rem;padding:.85rem 1rem;font-family:inherit;transition:border-color .15s,background .15s;display:flex}.ob-option-card strong{color:var(--fg);font-size:.9rem}.ob-option-card span{color:var(--muted);font-size:.78rem;line-height:1.35}.ob-option-card:hover{border-color:#2dd4bf59}.ob-option-card.is-active{border-color:var(--accent);background:var(--accent-dim)}.ob-option-card.is-active strong{color:var(--accent)}.ob-use-case-grid{grid-template-columns:1fr 1fr;gap:.6rem;margin-bottom:1.25rem;display:grid}.ob-use-case-card{background:var(--bg-soft);border:1px solid var(--line);text-align:left;cursor:pointer;border-radius:12px;flex-direction:column;align-items:flex-start;gap:.2rem;padding:.85rem 1rem;font-family:inherit;transition:border-color .15s,background .15s;display:flex}.ob-use-case-icon{margin-bottom:.15rem;font-size:1.3rem}.ob-use-case-card strong{color:var(--fg);font-size:.88rem}.ob-use-case-card span{color:var(--muted);font-size:.76rem;line-height:1.35}.ob-use-case-card:hover{border-color:#2dd4bf59}.ob-use-case-card.is-active{border-color:var(--accent);background:var(--accent-dim)}.ob-use-case-card.is-active strong{color:var(--accent)}.ob-style-label{color:var(--muted);margin:0 0 .5rem;font-size:.82rem}.ob-style-row{grid-template-columns:1fr 1fr;gap:.6rem;margin-bottom:1.5rem;display:grid}.ob-style-btn{text-align:left;cursor:pointer;background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;flex-direction:column;gap:.2rem;padding:.75rem .9rem;font-family:inherit;transition:border-color .15s,background .15s;display:flex}.ob-style-btn strong{color:var(--fg);font-size:.84rem}.ob-style-btn span{color:var(--muted);font-size:.74rem;line-height:1.35}.ob-style-btn:hover{border-color:#2dd4bf59}.ob-style-btn.is-active{border-color:var(--accent);background:var(--accent-dim)}.ob-style-btn.is-active strong{color:var(--accent)}.ob-saving{color:#5f6577;text-align:center;margin:.75rem 0 0;font-size:.82rem}.lecture-first-hint{background:color-mix(in srgb, var(--accent) 8%, var(--panel));border-bottom:1px solid var(--accent-dim);color:var(--fg);align-items:center;gap:.65rem;padding:.65rem 1rem;font-size:.82rem;animation:.3s hint-slide-in;display:flex}@keyframes hint-slide-in{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.lecture-first-hint-dot{background:var(--accent);border-radius:50%;flex-shrink:0;width:8px;height:8px;animation:1.8s ease-in-out infinite mic-dot-pulse}.lecture-first-hint-dismiss{border:1px solid var(--accent-dim);color:var(--accent);cursor:pointer;background:0 0;border-radius:5px;flex-shrink:0;margin-left:auto;padding:.25rem .65rem;font-size:.75rem;font-weight:600;transition:background .15s}.lecture-first-hint-dismiss:hover{background:var(--accent-soft)}.lecture-room-v2{grid-template-rows:auto minmax(0,1fr);min-height:calc(100vh - 118px);max-height:calc(100vh - 118px);display:grid;overflow:hidden}.lecture-room-v2 .immersive-room-header{border-bottom:1px solid color-mix(in srgb, var(--line) 70%, transparent);margin-bottom:.5rem;padding:.3rem 0 .4rem}.lecture-room-v2 .immersive-room-kicker{letter-spacing:.08em;text-transform:uppercase;margin-bottom:.1rem;font-size:.72rem}.lecture-room-v2 .immersive-room-title-row h1{margin:0;font-size:clamp(1.2rem,1.7vw,1.55rem);line-height:1.15}.lecture-room-v2 .immersive-room-topic-goal{max-width:92ch;color:color-mix(in srgb, var(--muted) 88%, var(--fg));-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-top:.3rem;font-size:.86rem;line-height:1.4;display:-webkit-box;overflow:hidden}.lecture-room-v2 .immersive-room-content{grid-template-columns:minmax(0,2.4fr) minmax(340px,1fr);align-items:stretch;gap:1.1rem;height:100%;min-height:0;display:grid}.lecture-room-v2 .immersive-room-stage{height:100%;min-height:0}.lecture-room-v2 .lecture-notebook{border:1px solid color-mix(in srgb, var(--line) 90%, transparent);background:color-mix(in srgb, var(--panel) 95%, transparent);border-radius:14px;grid-template-rows:minmax(0,1fr);height:100%;min-height:0;display:grid;box-shadow:0 12px 28px #00000014}.lecture-room-v2 .lecture-stage-toolbar,.lecture-room-v2 .lecture-slide-strip,.lecture-room-v2 .lecture-stage-empty{display:none}.lecture-room-v2 .lecture-stage-scroll{height:100%;min-height:0;padding:0;overflow:hidden}.lecture-room-v2 .lecture-canvas{grid-template-rows:auto minmax(0,1fr);gap:.85rem;height:100%;min-height:0;padding:1.1rem 1.2rem 1.3rem;display:grid;overflow:hidden}.lecture-room-v2 .lecture-scene-topbar{justify-content:space-between;align-items:center;gap:.65rem;display:flex}.lecture-room-v2 .lecture-scene-switcher{align-items:center;gap:.35rem;display:inline-flex}.lecture-room-v2 .lecture-scene-switcher-btn{border:1px solid color-mix(in srgb, var(--line) 92%, transparent);background:color-mix(in srgb, var(--bg-soft) 90%, transparent);color:var(--muted);letter-spacing:.03em;cursor:pointer;border-radius:999px;padding:.32rem .74rem;font-size:.76rem;font-weight:700}.lecture-room-v2 .lecture-scene-switcher-btn.is-active{color:var(--fg);border-color:color-mix(in srgb, var(--accent) 40%, var(--line));background:color-mix(in srgb, var(--accent) 10%, var(--bg-soft))}.lecture-room-v2 .lecture-scene-switcher-btn:disabled{opacity:.6;cursor:not-allowed}.lecture-room-v2 .lecture-scene-status{color:var(--muted);border:1px solid color-mix(in srgb, var(--line) 92%, transparent);background:color-mix(in srgb, var(--bg-soft) 92%, transparent);white-space:nowrap;border-radius:999px;margin:0;padding:.25rem .62rem;font-size:.74rem}.lecture-room-v2 .lecture-scene-status.is-loading{color:color-mix(in srgb, var(--accent) 66%, var(--fg));border-color:color-mix(in srgb, var(--accent) 34%, var(--line));background:color-mix(in srgb, var(--accent) 12%, var(--bg-soft))}.lecture-room-v2 .lecture-scene-status.is-warning{color:color-mix(in srgb, #f59e0b 72%, var(--fg));border-color:color-mix(in srgb, #f59e0b 32%, var(--line));background:color-mix(in srgb, #f59e0b 12%, var(--bg-soft))}.lecture-room-v2 .lecture-scene-status.is-error{color:color-mix(in srgb, #f87171 78%, var(--fg));border-color:color-mix(in srgb, #f87171 34%, var(--line));background:color-mix(in srgb, #f87171 14%, var(--bg-soft))}.lecture-room-v2 .wb-stage,.lecture-room-v2 .wb-stage-slides{height:100%}.lecture-room-v2 .wb-canonical-slide{grid-template-rows:auto auto minmax(0,1fr);gap:.75rem;height:100%;min-height:0;padding:.3rem .35rem .5rem;display:grid}.lecture-room-v2 .wb-canonical-generated-slide{padding:0;display:block;overflow:hidden}.lecture-room-v2 .wb-canonical-header h3{letter-spacing:-.02em;white-space:normal;overflow-wrap:anywhere;margin:0;font-size:clamp(1.24rem,1.8vw,1.72rem);line-height:1.2}.lecture-room-v2 .wb-canonical-bullets{min-height:0;overflow:visible}.lecture-room-v2 .wb-canonical-bullets ul{gap:.45rem;margin:0;padding-left:1.2rem;display:grid}.lecture-room-v2 .wb-canonical-bullets li{color:var(--fg);white-space:normal;max-width:100%;font-size:.95rem;line-height:1.42}.lecture-room-v2 .wb-canonical-visual{background:#fff3;border:1px solid #64584024;border-radius:12px;min-height:0;overflow:hidden}.lecture-room-v2 .wb-canonical-visual-card{height:100%;min-height:0;padding:.35rem .45rem;overflow:hidden}.lecture-room-v2 .wb-auto-fit-visual{width:100%;min-width:0;height:100%;min-height:0;position:relative;overflow:hidden}.lecture-room-v2 .wb-auto-fit-visual-content{--wb-visual-fit-scale:1;width:100%;transform:translate(-50%, -50%) scale(var(--wb-visual-fit-scale));transform-origin:50%;position:absolute;top:50%;left:50%}.lecture-room-v2 .wb-auto-fit-visual .wb-display-math .katex-display,.lecture-room-v2 .wb-auto-fit-visual .wb-derivation-step{overflow:visible}.lecture-room-v2 .wb-auto-fit-visual .wb-slide-card img{max-height:none}.lecture-room-v2 .wb-canonical-visual-empty{height:100%}.lecture-room-v2 .wb-canonical-visual-card .wb-rendered-visual,.lecture-room-v2 .wb-canonical-visual-card .wb-plot-block,.lecture-room-v2 .wb-canonical-visual-card .wb-tree-block,.lecture-room-v2 .wb-canonical-visual-card .wb-number-line-block,.lecture-room-v2 .wb-canonical-visual-card .wb-venn-block,.lecture-room-v2 .wb-canonical-visual-card .wb-equation,.lecture-room-v2 .wb-canonical-visual-card .wb-derivation,.lecture-room-v2 .wb-canonical-visual-card .wb-matrix-block{border-radius:10px}.lecture-room-v2 .wb-canonical-visual-card:has(.wb-storyboard){padding:0}.lecture-room-v2 .wb-canonical-visual-card:has(.wb-generated-image){padding:0;overflow:hidden}.wb-generated-image{background:0 0;border-radius:11px;grid-template-rows:minmax(0,1fr) auto;width:100%;height:100%;min-height:0;margin:0;display:grid;position:relative;overflow:hidden}.wb-generated-image-media{min-width:0;min-height:0;position:relative}.wb-generated-image-asset{object-fit:contain;object-position:center}.wb-generated-image-caption{color:var(--fg);grid-template-columns:minmax(0,auto) minmax(0,1fr);align-items:baseline;gap:.55rem 1.25rem;padding:.72rem .2rem .05rem;display:grid}.wb-generated-image-caption strong{letter-spacing:-.01em;font-size:clamp(.86rem,1.2vw,1rem);line-height:1.3}.wb-generated-image-caption span{color:var(--muted);font-size:clamp(.76rem,1vw,.88rem);line-height:1.4}.wb-storyboard{color:#252018;background:radial-gradient(circle at 15% 20%,#c18e4121,#0000 34%),linear-gradient(145deg,#fffdf7f5,#f2ece0f0);border-radius:11px;width:100%;height:100%;min-height:240px;margin:0;position:relative;overflow:hidden}.wb-storyboard-art{opacity:.34;filter:saturate(.72)contrast(.92);position:absolute;inset:0}.wb-storyboard-art-image{object-fit:cover}.wb-storyboard:after{content:"";pointer-events:none;background:linear-gradient(#fffdf714,#fffdf752);position:absolute;inset:0}.wb-storyboard-edges{z-index:2;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.wb-storyboard-edges marker path{fill:#766348}.wb-storyboard-edges line{stroke:#766348;stroke-width:.55px;vector-effect:non-scaling-stroke;opacity:0;transition:opacity .32s,stroke .26s,stroke-width .26s}.wb-storyboard-edges line.is-visible{opacity:.72}.wb-storyboard-edges line.is-focused{stroke:#b45309;stroke-width:1px;opacity:1}.wb-storyboard-node{z-index:4;text-align:center;opacity:0;background:#fffdf7e6;border:1px solid #5b482f3d;border-radius:11px;flex-direction:column;justify-content:center;align-items:center;gap:.22rem;padding:.46rem .6rem;transition:opacity .32s,transform .32s,border-color .26s,box-shadow .26s;display:flex;position:absolute;transform:translateY(7px)scale(.98);box-shadow:0 7px 24px #4d391f17}.wb-storyboard-node.is-visible{opacity:1;transform:translateY(0)scale(1)}.wb-storyboard-node.is-focused{border-color:#b45309c7;box-shadow:0 0 0 3px #d977061f,0 9px 25px #4d391f24}.wb-storyboard-node strong{font-family:inherit;font-size:clamp(.76rem,1.3vw,1rem);font-weight:700;line-height:1.08}.wb-storyboard-node span{color:#372d20b8;font-size:clamp(.58rem,.9vw,.72rem);line-height:1.15;display:block}.wb-storyboard-node-store{background:#ecf5f2f0;border-radius:18px/9px}.wb-storyboard-node-queue{background:#f9f0def0;border-style:dashed}.wb-storyboard-node-actor,.wb-storyboard-node-result{background:#f7ebd8f0}.wb-storyboard-edge-label{z-index:3;color:#69563e;text-align:center;opacity:0;background:#fffdf7e0;border-radius:5px;max-width:18%;padding:.14rem .3rem;font-size:clamp(.52rem,.78vw,.66rem);line-height:1.05;transition:opacity .26s;position:absolute;transform:translate(-50%,-50%)}.wb-storyboard-edge-label.is-visible{opacity:1}.wb-storyboard-beat{z-index:6;color:#443725;background:#fffdf7eb;border:1px solid #5b482f29;border-radius:9px;justify-content:space-between;align-items:center;gap:.7rem;width:min(92%,760px);padding:.42rem .58rem .42rem .72rem;font-size:clamp(.66rem,.95vw,.8rem);line-height:1.22;display:flex;position:absolute;bottom:.55rem;left:50%;transform:translate(-50%);box-shadow:0 5px 18px #4d391f14}.wb-storyboard-beat nav{flex:none;gap:.28rem;display:flex}.wb-storyboard-beat button{cursor:pointer;background:#5b482f3d;border:0;border-radius:999px;width:.42rem;height:.42rem;padding:0}.wb-storyboard-beat button.is-active{background:#b45309}@media (prefers-reduced-motion:reduce){.wb-storyboard-node,.wb-storyboard-edges line,.wb-storyboard-edge-label{transition:none}}.lecture-room-v2 .wb-spatial-stage{height:100%;min-height:0}.lecture-room-v2 .wb-spatial-block{overflow:hidden}.lecture-room-v2 .wb-spatial-text .wb-note{text-transform:none;letter-spacing:.01em;text-align:left;background:#f7f3e98c;border:1px solid #64584026;border-radius:8px;place-items:start;height:100%;padding:.55rem .65rem;font-size:.88rem;line-height:1.4;overflow-y:auto}.lecture-room-v2 .wb-spatial-text-insight .wb-note-insight{text-align:center;border:none;border-top:3px solid var(--accent);background:color-mix(in srgb, var(--accent) 8%, #f7f3e98c);border-radius:10px;place-items:center;padding:1.2rem 1.6rem;font-size:clamp(1rem,1.5vw,1.25rem);font-weight:600;line-height:1.5;overflow-y:auto}.lecture-room-v2 .wb-spatial-equation .wb-equation-wrap,.lecture-room-v2 .wb-spatial-equation .wb-equation{height:100%;min-height:0}.lecture-room-v2 .wb-spatial-equation .wb-equation{padding:.5rem .65rem;font-size:clamp(.96rem,1.16vw,1.2rem);line-height:1.2;overflow:auto}.lecture-room-v2 .wb-display-math .katex-display{max-width:100%;overflow:auto hidden}.lecture-room-v2 .wb-note-equation-fallback{-webkit-line-clamp:5;text-overflow:ellipsis;white-space:normal;text-transform:none;-webkit-box-orient:vertical;font-size:.82rem;font-weight:600;line-height:1.28;display:-webkit-box;overflow:hidden}.lecture-room-v2>.voice-right,.lecture-room-v2 .immersive-room-content>.voice-right{border:1px solid color-mix(in srgb, var(--line) 90%, transparent);background:color-mix(in srgb, var(--panel) 96%, transparent);border-radius:14px;grid-template-rows:auto auto auto minmax(0,1fr);justify-self:end;width:100%;max-width:420px;height:100%;min-height:0;display:grid;overflow:hidden;box-shadow:0 12px 28px #0000000f}.lecture-room-v2 .voice-right-head{border-bottom:1px solid color-mix(in srgb, var(--line) 88%, transparent);padding:.75rem .9rem}.lecture-room-v2 .voice-right-head h2{letter-spacing:.04em;text-transform:uppercase;font-size:1.08rem}.lecture-room-v2 .voice-soundwave{border-bottom:1px solid color-mix(in srgb, var(--line) 88%, transparent);background:0 0;margin:0;padding:.38rem .9rem .22rem}.lecture-room-v2 .ptt-bar{border-bottom:1px solid color-mix(in srgb, var(--line) 88%, transparent);margin:0;padding:.65rem .9rem}.lecture-room-v2 .voice-transcript{overscroll-behavior:contain;scroll-behavior:smooth;min-height:0;max-height:none;margin:0;padding:.85rem .95rem 1rem;overflow-y:auto}.lecture-room-v2 .voice-turn{border-radius:10px;margin-bottom:.62rem;padding:.6rem .68rem}.lecture-room-v2 .voice-turn-professor{background:color-mix(in srgb, var(--bg-soft) 80%, transparent)}.lecture-room-v2 .voice-turn-user{background:color-mix(in srgb, var(--accent) 10%, var(--bg-soft))}.lecture-room-v2 .voice-speaker{letter-spacing:.06em;text-transform:uppercase;margin-bottom:.22rem;font-size:.72rem}.lecture-room-v2 .voice-text{font-size:1.01rem;line-height:1.58}.lecture-room-v2 .topic-nav-bar{background:0 0;border:0;border-radius:0;gap:.4rem;min-height:0;margin-top:.4rem;padding:.3rem .4rem}.lecture-room-v2 .topic-nav-btn{border-radius:8px;padding:.3rem .7rem;font-size:.8rem;font-weight:700}.lecture-room-v2 .topic-nav-label strong{font-size:.82rem;line-height:1.2}.lecture-room-v2 .immersive-room-progress-track{height:3px;margin-top:.2rem}.lecture-room-v2 .immersive-room-breadcrumb{opacity:.82;margin-bottom:0;font-size:.72rem}.lecture-room-v2 .immersive-room-header-copy{gap:.22rem}@media (max-width:1100px){.lecture-room-v2{min-height:auto;max-height:none;overflow:visible}.lecture-room-v2 .immersive-room-content{grid-template-columns:1fr;height:auto}.lecture-room-v2 .immersive-room-stage{height:58vh;min-height:58vh}.lecture-room-v2>.voice-right,.lecture-room-v2 .immersive-room-content>.voice-right{justify-self:stretch;width:100%;max-width:none;height:48vh;min-height:360px}}.college-dashboard{--college-primary:#2644d9;--college-accent:#7547d1;--college-bg:#f5f6f8;--college-card:#fff;--college-navy:#141b3d;--college-text:#1a2032;--college-muted:#5f6577;--fg:var(--college-text);--muted:var(--college-muted);--accent:var(--college-primary);--accent-strong:#1f3ac1;--accent-soft:#3351eb1a;--panel:var(--college-card);--panel-2:#fcfcfd;--line:#dfe3ec;--line-strong:#c6cddc;--subject-bio:#2ead63;--subject-physics:#1a7ce6;--subject-cs:#8243db;--subject-history:#f48525;--subject-english:#ea5399;--subject-math:#28afac;background:var(--college-bg);min-height:100vh;color:var(--college-text);grid-template-columns:240px minmax(0,1fr);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;display:grid}.college-dashboard.is-collapsed{grid-template-columns:84px minmax(0,1fr)}.college-sidebar{background:var(--college-navy);color:#ecf1ff;border-right:1px solid #ffffff14;grid-template-rows:auto 1fr auto;gap:1.35rem;padding:1.35rem .9rem;display:grid}.college-sidebar-brand{align-items:center;gap:.75rem;display:flex}.college-logo{color:#fff;background:linear-gradient(145deg,#455df7,#8944e4);border-radius:.75rem;place-items:center;width:2.2rem;height:2.2rem;display:grid;box-shadow:0 8px 18px #493ac159}.college-logo svg{width:1.1rem;height:1.1rem}.college-brand-copy{gap:.12rem;display:grid}.college-brand-copy strong{letter-spacing:-.01em;font-size:1.06rem;font-weight:700;line-height:1.1}.college-brand-copy span{color:#ecf1ffb8;font-size:.73rem}.college-nav{align-content:start;gap:.35rem;display:grid}.college-nav-item{color:#ecf1ffe0;border-radius:.75rem;align-items:center;gap:.7rem;min-height:2.7rem;padding:.58rem .72rem;text-decoration:none;transition:background-color .14s;display:flex}.college-nav-item:hover{background:#ffffff12}.college-nav-item.is-active{background:#8094ff2e}.college-nav-icon{flex:none;width:1.15rem;height:1.15rem}.college-nav-icon svg{width:100%;height:100%}.college-nav-label{white-space:nowrap;font-size:.92rem}.college-nav-label.is-hidden,.college-dashboard.is-collapsed .college-brand-copy,.college-dashboard.is-collapsed .college-user-email,.college-dashboard.is-collapsed .college-signout,.college-dashboard.is-collapsed .college-signout-error{display:none}.college-sidebar-footer{align-content:end;gap:.45rem;display:grid}.college-user-email{color:#ecf1ffb8;text-overflow:ellipsis;font-size:.7rem;overflow:hidden}.college-signout{color:#ecf1ff;text-align:left;cursor:pointer;background:#ffffff1a;border:0;border-radius:.6rem;padding:.5rem .58rem;font-size:.74rem}.college-signout:disabled{cursor:wait;opacity:.65}.college-signout-error{color:#fecaca;font-size:.68rem;line-height:1.35}.college-main-shell{background:radial-gradient(520px 220px at 90% -40%, #8d5fe71a, transparent 70%), var(--college-bg);min-width:0}.college-topbar{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffa8;border-bottom:1px solid #e6e8ef;align-items:center;height:3.5rem;padding:0 1.3rem;display:flex;box-shadow:0 1px #10182808}.college-hamburger{color:#3b4872;cursor:pointer;background:0 0;border:0;width:2rem;height:2rem;padding:0}.college-hamburger svg{width:1.2rem;height:1.2rem}.college-main-content{gap:1.5rem;width:100%;max-width:1260px;margin:0 auto;padding:1.85rem;display:grid}.college-alert{color:#932f32;background:#fef0f1;border:1px solid #f3b4b7;border-radius:.75rem;margin:0;padding:.75rem .95rem;font-size:.86rem}.college-banner{background:linear-gradient(120deg,#3553e924,#8758e41c),#fff;border:1px solid #bcc3e6b3;border-radius:.75rem;gap:1.1rem;padding:1.55rem;animation:.22s ease-out college-fade-in;display:grid;box-shadow:0 10px 26px #1829590f}.college-banner-copy h1{letter-spacing:-.025em;margin:0;font-size:clamp(1.52rem,2.5vw,2rem);font-weight:750}.college-banner-copy p{color:var(--college-muted);margin:.62rem 0 0;font-size:.92rem;line-height:1.48}.college-banner-eyebrow{text-transform:uppercase;letter-spacing:.12em;color:#3944a2;margin:0;font-size:.7rem}.college-banner-stats{grid-template-columns:repeat(3,minmax(180px,1fr));gap:.75rem;display:grid}.college-stat-chip{background:#ffffffc7;border:1px solid #d0d4e7e6;border-radius:.7rem;align-items:center;gap:.6rem;padding:.7rem .8rem;display:flex}.college-stat-icon{color:#3841bc;width:1rem;height:1rem}.college-stat-icon svg{width:100%;height:100%}.college-stat-chip p{color:var(--college-muted);margin:0;font-size:.73rem}.college-stat-chip strong{font-size:.95rem}.college-quick-lecture{gap:.65rem;display:grid}.college-quick-lecture h2,.college-course-head h2{letter-spacing:-.024em;margin:0;font-size:clamp(1.3rem,2vw,1.55rem);font-weight:700}.college-quick-row{gap:.72rem;max-width:500px;display:flex}.college-search-field{background:#fff;border:1px solid #d5d9e7;border-radius:.75rem;flex:1;align-items:center;gap:.55rem;min-height:2.75rem;padding:0 .68rem;transition:border-color .12s,box-shadow .12s;display:flex}.college-search-field svg{color:#737b96;width:.97rem;height:.97rem}.college-search-field input{width:100%;color:var(--college-text);background:0 0;border:0;font-size:.92rem}.college-search-field input:focus{outline:none}.college-search-field:focus-within{border-color:#6677d6;box-shadow:0 0 0 3px #5e71e824}.college-go-btn{background:linear-gradient(140deg, var(--college-primary), var(--college-accent));color:#fff;cursor:pointer;border:0;border-radius:.75rem;align-items:center;gap:.42rem;min-height:2.75rem;padding:0 1rem;font-weight:600;transition:transform .14s,box-shadow .14s;display:inline-flex;box-shadow:0 8px 18px #2f40da3b}.college-go-btn svg{width:.92rem;height:.92rem}.college-go-btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px #2f40da47}.college-course-section{gap:.95rem;display:grid}.college-course-head{justify-content:space-between;align-items:center;gap:1rem;display:flex}.college-view-all{color:#41559f;background:#ffffffb8;border:1px solid #c8cee5;border-radius:.65rem;padding:.34rem .68rem;font-size:.78rem;font-weight:600;text-decoration:none;transition:background-color .12s,border-color .12s}.college-view-all:hover{background:#fff;border-color:#9aa7d6}.college-course-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;display:grid}.college-course-card{color:inherit;background:var(--college-card);border:1px solid #e6e9ef;border-top:3px solid var(--subject-color,var(--subject-cs));border-radius:.75rem;gap:.75rem;padding:1rem;text-decoration:none;transition:transform .16s,box-shadow .17s;animation:.26s ease-out both college-fade-in-up;display:grid;position:relative;box-shadow:0 2px 6px #1f2e580a}.college-course-card:hover{transform:translateY(-3px);box-shadow:0 16px 30px #1320491f}.college-course-top{align-items:center;gap:.58rem;display:flex}.college-course-icon{background:color-mix(in hsl, var(--subject-color) 17%, white);width:1.65rem;height:1.65rem;color:var(--subject-color);border-radius:.55rem;place-items:center;display:grid}.college-course-icon svg{width:.9rem;height:.9rem}.college-course-code{color:var(--college-muted);letter-spacing:.04em;font-size:.7rem;font-weight:600}.college-course-card h3{color:#21283b;letter-spacing:-.01em;margin:0;font-size:1.02rem;font-weight:720;line-height:1.2}.college-course-card p{color:var(--college-muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;min-height:2.5em;margin:0;font-size:.83rem;line-height:1.46;display:-webkit-box;overflow:hidden}.college-progress-footer{color:#697286;justify-content:space-between;align-items:center;font-size:.7rem;display:flex}.college-progress-track{background:#eaecf1;border-radius:999px;height:.3rem;overflow:hidden}.college-progress-track span{border-radius:inherit;background:var(--subject-color);height:100%;display:block}.college-course-card.subject-bio{--subject-color:var(--subject-bio)}.college-course-card.subject-physics{--subject-color:var(--subject-physics)}.college-course-card.subject-cs{--subject-color:var(--subject-cs)}.college-course-card.subject-history{--subject-color:var(--subject-history)}.college-course-card.subject-english{--subject-color:var(--subject-english)}.college-course-card.subject-math{--subject-color:var(--subject-math)}.college-course-card:first-child{animation-delay:30ms}.college-course-card:nth-child(2){animation-delay:60ms}.college-course-card:nth-child(3){animation-delay:90ms}.college-course-card:nth-child(4){animation-delay:.12s}@keyframes college-fade-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes college-fade-in-up{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.college-banner,.college-course-card{animation:none}.college-go-btn,.college-course-card{transition:none}}@media (max-width:1180px){.college-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:860px){.college-dashboard,.college-dashboard.is-collapsed{grid-template-columns:1fr}.college-sidebar{grid-template-rows:1fr;grid-template-columns:auto 1fr auto;align-items:center;gap:.75rem;padding:.75rem}.college-nav{align-items:center;display:flex;overflow-x:auto}.college-nav-label{display:inline}.college-user-email,.college-signout{display:none}.college-main-content{gap:1.1rem;padding:1rem}.college-banner-stats{grid-template-columns:1fr}.college-quick-row{flex-direction:column;max-width:none}}@media (max-width:640px){.college-course-grid{grid-template-columns:1fr}}.college-main-shell .platform-page{width:100%;max-width:none;margin:0;padding:0}.college-main-shell .platform-page-wide,.college-main-shell .platform-page-full-bleed{max-width:none;padding:0}.college-main-shell .platform-stack{gap:1.25rem;width:100%;max-width:1260px;margin:0 auto;padding:1.85rem;display:grid}.college-main-shell .platform-card,.college-main-shell .platform-hero,.college-main-shell .platform-room-hero,.college-main-shell .platform-note-card,.college-main-shell .platform-metric-card,.college-main-shell .generate-page-shell,.college-main-shell .syllabus-shell,.college-main-shell .platform-library-card,.college-main-shell .platform-syllabus-card{background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;box-shadow:0 10px 24px #1829590f}.college-main-shell .platform-hero h1,.college-main-shell .platform-room-hero h1,.college-main-shell .generate-page-head h1,.college-main-shell .syllabus-title{color:#1a2032;letter-spacing:-.024em;font-weight:700}.college-main-shell .platform-hero-text,.college-main-shell .platform-inline-meta,.college-main-shell .syllabus-subtitle,.college-main-shell .syllabus-lecture-meta,.college-main-shell .platform-empty-state{color:#5f6577}.college-main-shell .platform-field>span,.college-main-shell .platform-field-label{color:#272c3f;font-weight:600}.college-main-shell .platform-input,.college-main-shell .platform-input-file{color:#1a2032;background:#fff;border:1px solid #ccd2e0;border-radius:.75rem}.college-main-shell .platform-input::placeholder{color:#858a99}.college-main-shell .platform-input:focus{border-color:#6677d6;box-shadow:0 0 0 3px #5e71e824}.college-main-shell .platform-primary-button,.college-main-shell .platform-secondary-button,.college-main-shell .platform-link-button,.college-main-shell .syllabus-resume-btn{border:1px solid #0000;border-radius:.75rem;min-height:2.65rem;font-weight:600}.college-main-shell .platform-primary-button,.college-main-shell .syllabus-resume-btn{color:#fff;background:linear-gradient(140deg,#2644d9,#7547d1);box-shadow:0 8px 18px #2f40da3b}.college-main-shell .platform-primary-button:hover,.college-main-shell .syllabus-resume-btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px #2f40da47}.college-main-shell .platform-secondary-button,.college-main-shell .platform-link-button,.college-main-shell .platform-ghost-button,.college-main-shell .syllabus-open-btn{color:#334584;background:#fff;border:1px solid #bbc2dd}.college-main-shell .platform-secondary-button:hover,.college-main-shell .platform-link-button:hover,.college-main-shell .platform-ghost-button:hover,.college-main-shell .syllabus-open-btn:hover{background:#f8f8fc;border-color:#94a1d1}.college-main-shell .platform-banner-error{color:#932f32;background:#fef0f1;border:1px solid #f3b4b7;border-radius:.75rem}.college-main-shell .generate-form-section,.college-main-shell .generate-level-card,.college-main-shell .generate-mode-card,.college-main-shell .generate-side-card{color:#1a2032;background:#fff;border-color:#dfe3ec}.college-main-shell .generate-level-card span,.college-main-shell .generate-mode-card span{color:#5f6577}.college-main-shell .generate-level-card.is-active,.college-main-shell .generate-mode-card.is-active{background:#3351eb14;border-color:#6277df;box-shadow:inset 0 0 0 1px #3351eb33}.college-main-shell .syllabus-lecture-title,.college-main-shell .platform-breadcrumb-row a,.college-main-shell .platform-breadcrumb,.college-main-shell .gen-ready-label{color:#334584}@media (max-width:860px){.college-main-shell .platform-stack{gap:1.1rem;padding:1rem}}.college-main-shell .admin-ops-shell{color:#1a2032}.college-main-shell .admin-ops-hero,.college-main-shell .admin-ops-panel,.college-main-shell .admin-ops-strip,.college-main-shell .admin-feed-card,.college-main-shell .admin-list-row,.college-main-shell .admin-kv-grid div{background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;box-shadow:0 10px 24px #1829590f}.college-main-shell .admin-ops-kicker,.college-main-shell .admin-ops-panel-head p,.college-main-shell .admin-ops-metric span,.college-main-shell .admin-ops-panel-head span,.college-main-shell .admin-list-row p{color:#5f6577}.college-main-shell .admin-ops-hero h1,.college-main-shell .admin-ops-panel-head h2,.college-main-shell .admin-ops-metric strong,.college-main-shell .admin-list-row strong{color:#1a2032}.college-main-shell .admin-ops-button{color:#fff;background:linear-gradient(140deg,#2644d9,#7547d1);border:1px solid #0000;border-radius:.75rem;box-shadow:0 8px 18px #2f40da3b}.college-main-shell .admin-ops-button-secondary{color:#334584;box-shadow:none;background:#fff;border:1px solid #bbc2dd}.college-main-shell .admin-ops-alert{color:#932f32;background:#fef0f1;border:1px solid #f3b4b7}.college-main-shell .admin-ops-pre,.college-main-shell .admin-pre{color:#1a2032;background:#f8f9fc;border:1px solid #ccd2e0;border-radius:.75rem}.college-main-shell .admin-list-row-button.is-active{background:#3351eb14;border-color:#6277df}.college-main-shell .immersive-room{color:#1a2032;background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;box-shadow:0 10px 24px #1829590f}.college-main-shell .immersive-room-header{background:linear-gradient(#fffffff0,#ffffffc7);border-bottom:1px solid #dfe3ec}.college-main-shell .immersive-room-breadcrumb,.college-main-shell .immersive-room-kicker,.college-main-shell .immersive-room-topic-goal,.college-main-shell .immersive-room-meta-line,.college-main-shell .topic-nav-loading,.college-main-shell .voice-state,.college-main-shell .voice-speaker,.college-main-shell .ptt-hint,.college-main-shell .lecture-stage-kicker,.college-main-shell .lecture-stage-meta{color:#5f6577}.college-main-shell .immersive-room-title-row h1,.college-main-shell .topic-nav-label strong,.college-main-shell .voice-right-head h2,.college-main-shell .voice-text,.college-main-shell .lecture-stage-toolbar h2{color:#1a2032}.college-main-shell .immersive-room-progress-track{background:#eaecf1;border-radius:999px}.college-main-shell .immersive-room-progress-track span{border-radius:inherit;background:linear-gradient(140deg,#2644d9,#7547d1)}.college-main-shell .immersive-room .topic-nav-bar{background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;box-shadow:0 8px 20px #18295914}.college-main-shell .immersive-room .topic-nav-btn{color:#334584;background:#fff;border:1px solid #bbc2dd;border-radius:.65rem}.college-main-shell .immersive-room .topic-nav-btn-next:not(:disabled){color:#334584;background:#3351eb14;border-color:#6277df}.college-main-shell .immersive-room .lecture-notebook{background:radial-gradient(560px 240px at 100% 0,#8d5fe717,#0000 70%),#fff}.college-main-shell .immersive-room .lecture-stage-toolbar,.college-main-shell .immersive-room .lecture-slide-chip,.college-main-shell .immersive-room .lecture-stage-empty{color:#1a2032;background:#ffffffeb;border:1px solid #ccd2e0;border-radius:.75rem}.college-main-shell .immersive-room .lecture-canvas,.college-main-shell .immersive-room .wb-spatial-stage{background-color:#f8f9fc;background-image:linear-gradient(#0000 39px,#1f2a4e0f 40px),linear-gradient(90deg,#0000 39px,#1f2a4e0a 40px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:40px 40px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box}.college-main-shell .immersive-room>.voice-right,.college-main-shell .immersive-room-content>.voice-right,.college-main-shell .lecture-room-v2>.voice-right,.college-main-shell .lecture-room-v2 .immersive-room-content>.voice-right{color:#1a2032;background:#fffffff2;border:1px solid #ccd2e0;border-radius:.75rem;box-shadow:0 10px 24px #1829591a}.college-main-shell .immersive-room .voice-turn{background:0 0;border-bottom:1px solid #dfe3ec}.college-main-shell .immersive-room .ptt-btn{color:#334584;background:#3351eb14;border:1px solid #6277df;border-radius:.7rem}.college-main-shell .lecture-first-hint,.college-main-shell .lecture-complete-banner{color:#1a2032;background:#fff;border:1px solid #dfe3ec;border-radius:.75rem;box-shadow:0 10px 24px #1829590f}.college-main-shell .lecture-complete-banner-label,.college-main-shell .lecture-complete-banner-sub{color:#5f6577}.college-main-shell .lecture-complete-cta{border-radius:.75rem}@media (max-width:1024px){.college-main-shell .immersive-room{height:auto;min-height:auto;max-height:none}}.onboarding-skip:hover{color:#334584;background:#f8f8fc;border-color:#94a1d1}.onboarding-dot.is-active{background:linear-gradient(140deg,#2644d9,#7547d1)}.onboarding-dot.is-done{background:#3351eb61}.onboarding-next-btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px #2f40da47}.onboarding-action-row:hover{background:#3351eb0f;border-color:#6277df}.onboarding-action-row-copy strong{color:#1a2032}.ob-name-input:focus{border-color:#6677d6;box-shadow:0 0 0 3px #5e71e824}.ob-option-card,.ob-use-case-card,.ob-option-card strong,.ob-use-case-card strong,.ob-style-btn strong{color:#1a2032}.ob-option-card span,.ob-use-case-card span,.ob-style-btn span{color:#5f6577}.ob-option-card:hover,.ob-use-case-card:hover,.ob-style-btn:hover{border-color:#6277df}.ob-option-card.is-active,.ob-use-case-card.is-active,.ob-style-btn.is-active{background:#3351eb14;border-color:#6277df}.ob-option-card.is-active strong,.ob-use-case-card.is-active strong,.ob-style-btn.is-active strong{color:#334584}@media (max-width:640px){.onboarding-shell{padding:1rem}.onboarding-header,.onboarding-progress,.onboarding-body-area{padding-left:1rem;padding-right:1rem}.ob-option-grid,.ob-use-case-grid,.ob-style-row{grid-template-columns:1fr}}.lecture-chat-shell{flex-direction:column;height:calc(100vh - 3.5rem);max-height:100%;display:flex}.lecture-chat-header{border-bottom:1px solid var(--border,#7f7f7f2e);padding:1rem 0 .75rem}.lecture-chat-back{color:var(--muted);font-size:.85rem;text-decoration:none}.lecture-chat-back:hover{color:var(--fg)}.lecture-chat-header h1{margin:.25rem 0 0;font-size:1.35rem}.lecture-chat-messages{flex-direction:column;flex:1;gap:.9rem;padding:1.25rem .25rem;display:flex;overflow-y:auto}.lecture-chat-empty{color:var(--muted);text-align:center;margin-top:2rem}.lecture-chat-message{max-width:100%;display:flex}.lecture-chat-message-user{justify-content:flex-end}.lecture-chat-message-assistant{justify-content:flex-start}.lecture-chat-bubble{white-space:pre-wrap;overflow-wrap:break-word;border-radius:1rem;max-width:min(46rem,82%);padding:.7rem 1rem;line-height:1.6}.lecture-chat-message-user .lecture-chat-bubble{background:var(--accent);color:var(--bg);border-bottom-right-radius:.25rem}.lecture-chat-message-assistant .lecture-chat-bubble{background:var(--accent-soft,var(--accent-dim));color:var(--fg);border-bottom-left-radius:.25rem}.lecture-chat-bubble-typing{color:var(--muted);font-style:italic}.lecture-chat-error{color:#dc2626;margin:.25rem 0;font-size:.85rem}.lecture-chat-composer{border-top:1px solid var(--border,#7f7f7f2e);align-items:flex-end;gap:.6rem;padding:.85rem 0;display:flex}.lecture-chat-input{resize:none;border:1px solid var(--border,#7f7f7f47);background:var(--bg);min-height:2.6rem;max-height:10rem;color:var(--fg);font:inherit;border-radius:.75rem;flex:1;padding:.65rem .85rem;line-height:1.4}.lecture-chat-input:focus{outline:2px solid var(--accent);outline-offset:1px}.lecture-chat-send{background:var(--accent);color:var(--bg);cursor:pointer;border:none;border-radius:.75rem;padding:.65rem 1.2rem;font-weight:600}.lecture-chat-send:disabled{opacity:.5;cursor:not-allowed}
