:root{--space: #04070d;--ink: #eaf3ff;--muted: #8fa3bd;--cyan: #49e5ff;--teal: #2dd4bf;--gold: #ffd166;--violet: #9b8cff;--glass: rgba(10, 18, 32, .72);--line: rgba(142, 177, 222, .2)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;overflow:hidden;background:var(--space);color:var(--ink);font-family:Space Grotesk,Noto Sans SC,sans-serif}button{font:inherit;color:inherit}#scene{position:fixed;top:0;right:0;bottom:0;left:0}#scene canvas{display:block;width:100%;height:100%;cursor:crosshair}body.entered #scene canvas{cursor:grab}body.entered #scene canvas:active{cursor:grabbing}.intro{position:fixed;top:0;right:0;bottom:0;left:0;z-index:4;display:flex;align-items:center;justify-content:center;overflow:hidden;pointer-events:none;background:radial-gradient(circle at 50% 44%,#0e182c00,#03060c33 48%,#0204099e),linear-gradient(180deg,#02050a1f,#02050a4d);transition:opacity .9s ease,visibility .9s ease}.intro-vignette{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,rgba(4,9,18,.58),transparent 38%,transparent 62%,rgba(4,9,18,.58)),radial-gradient(circle at center,transparent 44%,rgba(1,3,7,.86) 100%);pointer-events:none;transition:opacity .55s ease}.intro-copy{position:relative;z-index:2;width:min(620px,calc(100vw - 40px));text-align:center;pointer-events:auto;transition:opacity .55s ease,transform .55s ease}body.entering-void .intro-copy{opacity:0;transform:translateY(-10px)}body.entering-void .intro{background:transparent}body.entering-void .intro-vignette{opacity:0}.intro-kicker{color:var(--gold);font-size:11px;font-weight:700;letter-spacing:0;text-transform:uppercase}.intro-weather{display:inline-flex;align-items:center;gap:8px;margin-top:22px;padding:8px 12px;border:1px solid rgba(250,251,255,.16);border-radius:999px;background:#06091066;color:#c2cbdbd1;font-size:10px;font-weight:600;letter-spacing:.04em;-webkit-backdrop-filter:blur(18px) saturate(130%);backdrop-filter:blur(18px) saturate(130%)}.weather-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px #49e5ffe6;animation:weather-pulse 2.4s ease-in-out infinite}@keyframes weather-pulse{0%,to{opacity:.55;transform:scale(.9)}50%{opacity:1;transform:scale(1.12)}}.intro-title{margin:14px 0 10px;font-size:76px;font-weight:600;line-height:.92;letter-spacing:0;color:#f7fbff;text-shadow:0 0 28px rgba(73,229,255,.24),0 0 80px rgba(255,209,102,.12)}.intro-sub{margin:0 auto;max-width:440px;color:#9fb2ca;font-size:14px;line-height:1.7}.enter-btn{margin-top:28px;min-height:48px;padding:0 20px;display:inline-flex;align-items:center;gap:10px;border:1px solid rgba(255,209,102,.55);border-radius:8px;background:linear-gradient(135deg,#ffd1662e,#f2a65a14);color:#fff0c4;font-size:13px;font-weight:700;cursor:pointer;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:background .2s ease,transform .2s ease}.enter-btn:hover{background:linear-gradient(135deg,#ffd16652,#f2a65a24);transform:translateY(-2px)}.intro-rule{width:1px;height:54px;margin:26px auto 0;background:linear-gradient(180deg,#ffd166e6,#ffd16600)}.intro-hint{display:block;color:#657a94;font-size:11px}body.entered .intro{opacity:0;visibility:hidden;pointer-events:none}.hud{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:2}.topbar{position:absolute;top:18px;left:20px;right:20px;display:flex;align-items:center;justify-content:space-between;gap:12px;pointer-events:none;opacity:0;visibility:hidden;transform:translateY(-10px);transition:opacity .8s ease .15s,transform .8s ease .15s}body.entered .topbar{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand-mark{width:30px;height:30px;flex:0 0 auto;border-radius:50%;background:radial-gradient(circle at 35% 30%,rgba(255,255,255,.9),transparent 18%),radial-gradient(circle at 65% 70%,rgba(73,229,255,.8),transparent 30%),radial-gradient(circle at 40% 45%,rgba(255,209,102,.7),transparent 32%),#0a1220;border:1px solid rgba(255,255,255,.45);box-shadow:0 0 28px #49e5ff73}.brand-name{font-size:13px;font-weight:700;letter-spacing:0}.brand-sub{margin-top:2px;font-size:10px;color:var(--muted);letter-spacing:0}.progress-pill{display:flex;align-items:center;gap:10px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#040a14a8;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);font-size:12px;white-space:nowrap}#progressCount{color:var(--gold);font-weight:700}.progress-sep{width:1px;height:18px;background:var(--line)}#progressLabel{color:var(--muted)}.lesson-panel{position:absolute;right:22px;bottom:22px;width:min(440px,calc(100vw - 32px));max-height:min(72vh,720px);overflow:auto;padding:20px;border:1px solid var(--line);border-radius:8px;background:var(--glass);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);box-shadow:0 28px 90px #00000080;pointer-events:none;scrollbar-width:thin;opacity:0;visibility:hidden;transform:translateY(18px);transition:opacity .85s ease .35s,transform .85s ease .35s}body.entered .lesson-panel{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}.panel-topline{display:flex;align-items:center;justify-content:space-between;gap:12px}.eyebrow{font-size:10px;letter-spacing:0;color:var(--cyan);font-weight:700}.status-badge{padding:4px 8px;border:1px solid rgba(73,229,255,.35);border-radius:999px;color:var(--cyan);font-size:10px;letter-spacing:0}.status-badge.locked{color:var(--muted);border-color:#8fa3bd40}.status-badge.complete{color:var(--gold);border-color:#ffd16666}h1{margin:12px 0 2px;font-size:26px;line-height:1.15;letter-spacing:0}.lesson-name{margin:0 0 16px;color:var(--gold);font-size:13px;font-weight:600}.dialogue{display:grid;gap:8px}.line{display:grid;grid-template-columns:30px 1fr auto;gap:10px;align-items:start;padding:10px;border:1px solid rgba(142,177,222,.13);border-radius:8px;background:#08101e80}.line-speaker{font-size:9px;font-weight:700;letter-spacing:0;color:var(--teal);padding-top:2px}.line-text{font-size:14px;line-height:1.45}.line-play{width:30px;height:30px;display:grid;place-items:center;border:1px solid rgba(73,229,255,.25);border-radius:8px;background:transparent;cursor:pointer}.line-play:hover{background:#49e5ff1f}.icon{width:16px;height:16px;stroke-width:2}.focus-box{margin-top:14px;padding:12px;border:1px solid rgba(73,229,255,.3);border-radius:8px;background:linear-gradient(135deg,#2dd4bf14,#49e5ff0a)}.focus-title{display:flex;align-items:center;gap:7px;color:var(--cyan);font-size:11px;font-weight:700;letter-spacing:0}.focus-box p{margin:8px 0 0;font-size:14px}.focus-note{color:var(--muted);font-size:12px!important;line-height:1.55}.teacher-note{display:flex;gap:8px;align-items:flex-start;margin-top:12px;padding:10px 12px;border-left:2px solid var(--gold);background:#ffd1660f;color:#d8e4f2;font-size:12px;line-height:1.55}.teacher-note .icon{color:var(--gold);flex:0 0 auto}.actions{position:sticky;bottom:0;z-index:1;display:grid;grid-template-columns:1fr 1fr 1.45fr;gap:10px;margin:14px -20px -20px;padding:12px 20px 20px;background:linear-gradient(180deg,#070d1800,#070d18eb 28%,#070d18fa)}.soft-btn,.teacher-btn,.primary-btn{min-height:44px;display:flex;align-items:center;justify-content:center;gap:8px;border-radius:8px;border:1px solid transparent;cursor:pointer;font-size:13px;font-weight:700}.soft-btn{background:#49e5ff14;border-color:#49e5ff38}.teacher-btn{background:#9b8cff1a;border-color:#9b8cff4d;color:#dcd6ff}.teacher-btn:hover{background:#9b8cff2e}.primary-btn{background:linear-gradient(135deg,#ffd166,#f2a65a);color:#14100a;border-color:#ffd16680}.primary-btn:disabled{opacity:.45;cursor:not-allowed}.station-strip{position:absolute;left:22px;bottom:22px;display:flex;gap:10px;max-width:min(430px,calc(100vw - 460px));overflow:auto;pointer-events:none;scrollbar-width:none;opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .85s ease .5s,transform .85s ease .5s}body.entered .station-strip{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}.station-strip::-webkit-scrollbar{display:none}.station-chip{flex:0 0 auto;display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:#060c16ad;color:var(--muted);cursor:pointer;font-size:11px;font-weight:700}.station-chip.current{color:#081018;background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 20px #49e5ff80}.station-chip.complete{color:#14100a;background:var(--gold);border-color:var(--gold)}.station-chip.locked{cursor:not-allowed;opacity:.42}.toast{position:absolute;top:74px;left:50%;transform:translate(-50%) translateY(-16px);padding:9px 14px;border:1px solid rgba(255,209,102,.35);border-radius:8px;background:#08101cd1;color:#ffe7ad;font-size:12px;opacity:0;pointer-events:none;transition:opacity .24s ease,transform .24s ease}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.workbench{position:fixed;top:0;right:0;bottom:0;left:0;z-index:6;display:grid;grid-template-rows:auto minmax(0,1fr);background:radial-gradient(ellipse at 76% 18%,rgba(73,229,255,.06),transparent 38%),radial-gradient(ellipse at 18% 82%,rgba(155,140,255,.07),transparent 42%),linear-gradient(180deg,#050911f5,#020409fa);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .32s ease,visibility .32s ease}body.workbench-open .workbench{opacity:1;visibility:visible;pointer-events:auto}body.workbench-open .hud{display:none}.workbench-topbar{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 18px;border-bottom:1px solid var(--line);background:#050911c7;-webkit-backdrop-filter:blur(22px) saturate(130%);backdrop-filter:blur(22px) saturate(130%)}.workbench-brand{display:flex;align-items:center;gap:12px;min-width:0}.workbench-mark{width:30px;height:30px;flex:0 0 auto;border-radius:50%;background:radial-gradient(circle at 35% 30%,rgba(255,255,255,.9),transparent 18%),radial-gradient(circle at 65% 70%,rgba(73,229,255,.8),transparent 30%),radial-gradient(circle at 40% 45%,rgba(255,209,102,.7),transparent 32%),#0a1220;border:1px solid rgba(255,255,255,.35);box-shadow:0 0 24px #49e5ff59}.workbench-title{font-size:13px;font-weight:700;letter-spacing:0}.workbench-destination{margin-top:2px;color:var(--muted);font-size:11px}.workbench-session{display:flex;align-items:center;gap:10px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:#040a14a8;color:var(--gold);font-size:12px;font-weight:700;white-space:nowrap}.session-sep{width:1px;height:18px;background:var(--line)}#workbenchStepLabel{color:var(--cyan)}.workbench-globe-btn{height:36px;display:flex;align-items:center;gap:8px;padding:0 12px;border:1px solid rgba(73,229,255,.24);border-radius:8px;background:#49e5ff14;color:var(--ink);cursor:pointer;font-size:12px;font-weight:700}.workbench-globe-btn:hover{background:#49e5ff24}.workbench-globe-btn.complete{border-color:#ffd16680;background:linear-gradient(135deg,#ffd166,#f2a65a);color:#14100a}.workbench-globe-btn.complete:disabled{opacity:.38;cursor:not-allowed}.workbench-body{display:grid;grid-template-columns:250px minmax(0,1fr);min-height:0}.workbench-rail{display:flex;flex-direction:column;gap:10px;min-height:0;padding:18px 14px;border-right:1px solid var(--line);background:#04080fb3}.rail-title{margin:0 6px 4px;color:var(--muted);font-size:10px;font-weight:700;letter-spacing:.08em}.step-card{width:100%;min-height:64px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#0a12209e;color:var(--muted);cursor:pointer;text-align:left;transition:border-color .2s ease,background .2s ease,color .2s ease}.step-card:hover{background:#49e5ff12}.step-card.active{border-color:#49e5ff80;background:#49e5ff1f;color:var(--ink)}.step-card.done{border-color:#ffd16659;color:var(--gold)}.step-card.locked{opacity:.42;cursor:not-allowed}.step-number{color:var(--cyan);font-size:10px;font-weight:700}.step-copy{display:grid;gap:3px;min-width:0}.step-copy strong{font-size:13px;font-weight:700}.step-copy small{color:var(--muted);font-size:10px}.step-icon{width:18px;height:18px;color:currentColor}.rail-summary{margin-top:auto;padding:12px;border:1px solid rgba(255,209,102,.22);border-radius:8px;background:#ffd1660f}.rail-summary span{color:var(--muted);font-size:9px;font-weight:700;letter-spacing:.08em}.rail-summary strong{display:block;margin-top:6px;color:var(--gold);font-size:12px;line-height:1.45}.workbench-stage{min-width:0;min-height:0;overflow:auto;padding:26px}.stage-panel{display:none;height:100%;min-height:0;flex-direction:column}.stage-panel.active{display:flex}.stage-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:20px}.stage-kicker{color:var(--cyan);font-size:10px;font-weight:700;letter-spacing:.08em}.stage-head h2{margin:6px 0 0;font-size:26px;line-height:1.2;letter-spacing:0}.stage-sub{margin:7px 0 0;color:var(--muted);font-size:12px}.word-progress{min-width:190px;display:grid;gap:8px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#060c169e}.word-progress span{color:var(--gold);font-size:12px;font-weight:700;text-align:right}.progress-track{height:6px;overflow:hidden;border-radius:999px;background:#ffffff14}.progress-track span{display:block;width:0%;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--cyan),var(--teal),var(--gold));transition:width .3s ease}.word-grid{flex:1 1 auto;min-height:0;overflow:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;align-content:start}.word-card{padding:18px;border:1px solid rgba(142,177,222,.16);border-radius:8px;background:#08101ead;transition:border-color .2s ease,background .2s ease}.word-card.known{border-color:#ffd1666b;background:#ffd1660f}.word-card.review{border-color:#ff6b6b6b;background:#ff6b6b0d}.word-main{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.word-text{font-size:22px;font-weight:700;line-height:1.15}.word-phonetic{margin-top:4px;color:var(--muted);font-size:12px}.word-meaning{margin-top:12px;color:#dce8f5;font-size:14px;line-height:1.5}.word-sound{width:34px;height:34px;flex:0 0 auto;display:grid;place-items:center;border:1px solid rgba(73,229,255,.26);border-radius:8px;background:#49e5ff14;color:var(--cyan);cursor:pointer}.word-card-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}.word-action{min-height:38px;display:flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);border-radius:8px;background:#0c1626b3;color:var(--muted);cursor:pointer;font-size:12px;font-weight:700}.word-action.got-it{border-color:#2dd4bf4d;color:#a8fff1}.word-action.review{border-color:#ff6b6b47;color:#ff9f9f}.word-action.got-it:hover{background:#2dd4bf1a}.word-action.review:hover{background:#ff6b6b14}.stage-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}.secondary-btn,.primary-large{min-height:46px;display:flex;align-items:center;justify-content:center;gap:9px;padding:0 18px;border:1px solid transparent;border-radius:8px;cursor:pointer;font-size:13px;font-weight:700}.secondary-btn{border-color:var(--line);background:#0c1626b3;color:var(--muted)}.primary-large{background:linear-gradient(135deg,#ffd166,#f2a65a);color:#14100a;border-color:#ffd1668c}.primary-large:disabled,.soft-btn:disabled{opacity:.42;cursor:not-allowed}.article-status{padding:5px 9px;border:1px solid rgba(255,209,102,.32);border-radius:999px;color:var(--gold);font-size:10px;font-weight:700}.article-status.ready{color:var(--teal);border-color:#2dd4bf61}.article-toolbar{display:flex;align-items:center;gap:12px;margin-bottom:14px}.soft-btn{min-height:40px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 14px;border:1px solid rgba(73,229,255,.22);border-radius:8px;background:#49e5ff14;color:var(--ink);cursor:pointer;font-size:12px;font-weight:700}.soft-btn:hover{background:#49e5ff24}.read-check{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:#060c169e;color:var(--muted);cursor:pointer;font-size:12px;font-weight:700}.read-check input{width:16px;height:16px;accent-color:var(--teal)}.read-check input:disabled{opacity:.4}.article-scroll{flex:1 1 auto;min-height:0;overflow:auto;padding:26px 30px;border:1px solid rgba(142,177,222,.16);border-radius:8px;background:#070d18b8}.article-text{max-width:980px;margin:0 auto;color:#e4eefb;font-size:18px;line-height:1.95;letter-spacing:0}.article-text mark.word-red{padding:0 2px;background:#ff6b6b1f;color:#ff8585;font-weight:700;border-radius:3px}.connected-layout{flex:1 1 auto;min-height:0;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:16px}.speech-target,.speech-teacher{min-height:0;display:flex;flex-direction:column;padding:18px;border:1px solid var(--line);border-radius:8px;background:#08101ead}.speech-label,.teacher-mini-head{color:var(--cyan);font-size:10px;font-weight:700;letter-spacing:.08em}.speech-target h3{margin:16px 0 10px;font-size:24px;line-height:1.35;letter-spacing:0}.speech-natural{color:var(--gold);font-size:16px;line-height:1.5}.speech-note{margin:16px 0 0;color:var(--muted);font-size:13px;line-height:1.7}.speech-teacher{background:#0a111fcc}.speech-conversation{flex:1 1 auto;min-height:140px;overflow:auto;margin-top:14px;padding-right:4px;display:flex;flex-direction:column;gap:10px}.speech-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}.speech-controls button{min-height:42px;display:flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);border-radius:8px;background:#0c1626b8;color:var(--ink);cursor:pointer;font-size:12px;font-weight:700}.speech-controls button:hover{background:#49e5ff14}.speech-controls button.primary{border-color:#2dd4bf66;background:#2dd4bf1f;color:#a8fff1}.teacher-shell{position:fixed;top:0;right:0;bottom:0;left:0;z-index:7;display:grid;place-items:center;padding:20px;background:#02050a80;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .25s ease,visibility .25s ease}body.teacher-open .teacher-shell{opacity:1;visibility:visible;pointer-events:auto}.teacher-panel{width:min(460px,calc(100vw - 32px));max-height:min(84vh,760px);display:flex;flex-direction:column;border:1px solid rgba(142,177,222,.24);border-radius:8px;background:#070d18f0;box-shadow:0 32px 110px #00000094;overflow:hidden}.teacher-topline{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 18px;border-bottom:1px solid var(--line)}.teacher-heading{display:flex;align-items:center;gap:10px;min-width:0}.teacher-avatar{width:36px;height:36px;flex:0 0 auto;display:grid;place-items:center;border:1px solid rgba(73,229,255,.4);border-radius:50%;background:#49e5ff1f;color:var(--cyan)}.teacher-name{font-size:12px;font-weight:700;letter-spacing:0}.teacher-mode{margin-top:2px;color:var(--muted);font-size:10px;font-weight:700;letter-spacing:0}.teacher-mode.listening{color:var(--teal)}.icon-btn{width:32px;height:32px;flex:0 0 auto;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--muted);cursor:pointer}.icon-btn:hover{background:#ffd16614;color:var(--gold)}.teacher-conversation{flex:1 1 auto;min-height:170px;max-height:42vh;overflow:auto;padding:16px 18px;display:flex;flex-direction:column;gap:10px;scrollbar-width:thin}.message{display:flex;align-items:flex-start;gap:8px;max-width:92%}.message.student{align-self:flex-end;flex-direction:row-reverse}.message-avatar{width:26px;height:26px;flex:0 0 auto;display:grid;place-items:center;border-radius:50%;background:#ffd1661a;color:var(--gold)}.bubble{padding:9px 11px;border:1px solid rgba(142,177,222,.16);border-radius:8px;background:#0d182ad1;color:#dce8f5;font-size:12px;line-height:1.5}.message.student .bubble{border-color:#49e5ff3d;background:#49e5ff14}.teacher-practice{margin:0 18px 12px;padding:12px;border:1px solid rgba(73,229,255,.24);border-radius:8px;background:linear-gradient(135deg,#2dd4bf17,#49e5ff0a)}.practice-label{color:var(--cyan);font-size:9px;font-weight:700;letter-spacing:0}.practice-target{margin-top:7px;font-size:15px;font-weight:600;line-height:1.4}.practice-natural{margin-top:4px;color:var(--gold);font-size:13px;line-height:1.4}.teacher-controls{display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:8px;padding:0 18px 14px}.teacher-control{min-height:42px;display:flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);border-radius:8px;background:#0c1626b8;color:var(--ink);cursor:pointer;font-size:12px;font-weight:700}.teacher-control:hover{background:#49e5ff14}.teacher-control.primary{border-color:#2dd4bf6b;background:#2dd4bf1f;color:#a8fff1}.teacher-control.primary:hover{background:#2dd4bf33}.teacher-transcript{padding:10px 18px 16px;border-top:1px solid var(--line);color:var(--muted);font-size:11px;line-height:1.5}@media(max-width:1100px){.workbench-body{grid-template-columns:220px minmax(0,1fr)}.connected-layout{grid-template-columns:1fr;overflow:auto}.speech-teacher{min-height:320px}}@media(max-width:860px){.intro-title{font-size:44px}.topbar{top:12px;left:12px;right:12px}.brand-sub,#progressLabel{display:none}.lesson-panel{right:12px;bottom:12px;left:12px;width:auto;max-height:52vh;padding:16px}.actions{margin:14px -16px -16px;padding:12px 16px 16px}.station-strip{display:none}.actions{grid-template-columns:1fr}h1{font-size:22px}.teacher-shell{align-items:end;padding:10px}.teacher-panel{width:100%;max-height:92vh}.teacher-controls{grid-template-columns:1fr}}