:root{--page: #f3f5fb;--card: #ffffff;--card-hi: #f7f8fd;--border: #e1e5f2;--border-hi: rgba(99, 102, 241, .4);--text: #1d1b17;--accent: #6366f1;--accent-text: #4f46e5;--accent-soft: rgba(99, 102, 241, .09);--accent-glow: rgba(99, 102, 241, .3);--maki: #6d4fd8;--maki-soft: rgba(109, 79, 216, .08);--good: #0f766e;--good-soft: #e3f5f2;--warn: #a54a07;--warn-soft: #fff3e0;--bad: #b91c1c;--bad-soft: #fdecec;--chip: #eef2ff;--track: #d9ddee;--ink: #1d1b17;--ink-text: #ffffff;--cta: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--hero: radial-gradient(110% 150% at 85% -10%, rgba(139, 92, 246, .18) 0%, rgba(255, 255, 255, 0) 50%), radial-gradient(90% 120% at 10% 120%, rgba(99, 102, 241, .12) 0%, rgba(255, 255, 255, 0) 55%), linear-gradient(135deg, #ffffff 0%, #f7f8ff 100%);--shadow: 0 1px 2px rgba(29, 27, 23, .04);--topbar: rgba(255, 255, 255, .86);--chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234f46e5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");--font: "Inter", "Segoe UI", system-ui, sans-serif;--font-mono: ui-monospace, "Cascadia Mono", Consolas, monospace;--gutter: max(16px, env(safe-area-inset-left, 0px))}@media (prefers-color-scheme: dark){:root{--page: #0a0e19;--card: #121a2a;--card-hi: #182237;--border: rgba(148, 163, 255, .1);--border-hi: rgba(129, 140, 248, .45);--text: #f4f1ea;--accent: #818cf8;--accent-text: #a5b4fc;--accent-soft: rgba(129, 140, 248, .14);--accent-glow: rgba(129, 140, 248, .4);--maki: #a78bfa;--maki-soft: rgba(167, 139, 250, .1);--good: #2dd4bf;--good-soft: rgba(45, 212, 191, .13);--warn: #fbbf24;--warn-soft: rgba(251, 191, 36, .13);--bad: #f87171;--bad-soft: rgba(248, 113, 113, .14);--chip: rgba(148, 163, 255, .08);--track: rgba(148, 163, 255, .22);--ink: #f4f1ea;--ink-text: #121a2a;--hero: radial-gradient(110% 150% at 85% -10%, rgba(139, 92, 246, .3) 0%, rgba(18, 26, 42, 0) 50%), radial-gradient(90% 120% at 10% 120%, rgba(99, 102, 241, .18) 0%, rgba(18, 26, 42, 0) 55%), linear-gradient(135deg, #141d31 0%, #0f1626 100%);--shadow: none;--topbar: rgba(10, 14, 25, .82);--chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a5b4fc' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");color-scheme:dark}}*{box-sizing:border-box}html,body{margin:0}body{background:var(--page);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}h1,h2{margin:0;line-height:1.2;letter-spacing:-.01em}h1{font-size:1.15rem;font-weight:700}h2{font-size:.875rem;font-weight:600}p{margin:0}[hidden]{display:none!important}button,select,input,textarea{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.icon{width:16px;height:16px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.topbar{position:sticky;top:0;z-index:10;background:var(--topbar);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.topbar-inner{max-width:1240px;margin:0 auto;padding:12px var(--gutter);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px}.brand{display:flex;align-items:center;gap:12px;min-width:0}.logo{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--cta);color:#fff;box-shadow:0 8px 20px -8px var(--accent-glow)}.logo .icon{width:20px;height:20px}.sub{font-size:.75rem;font-weight:500}.top-right{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.pill{display:inline-flex;align-items:center;gap:6px;font-size:.72rem;font-weight:600;padding:4px 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var(--border-hi);border-radius:16px;background:var(--hero)}.empty-avatar{width:52px;height:52px;margin-bottom:6px;border-radius:16px;display:grid;place-items:center;background:var(--cta);color:#fff;box-shadow:0 14px 30px -12px var(--accent-glow)}.empty-avatar .icon{width:24px;height:24px}.empty-title{font-size:1rem;font-weight:700}.empty p:not(.empty-title){font-size:.8125rem}.examples{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:6px;max-width:560px}.examples button{font-size:.8125rem;font-weight:500;padding:6px 12px;border-radius:999px;background:var(--card);border:1px solid var(--border);cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}.examples button:hover{border-color:var(--border-hi);color:var(--accent-text);background:var(--accent-soft)}.msg.thinking{min-width:0}.msg.thinking:before{animation:avatar-pulse 1.4s ease-in-out infinite}.thinking-row{display:inline-flex;align-items:center;gap:10px;padding:2px 0}.dots{display:inline-flex;align-items:center;gap:4px}.dots i{width:7px;height:7px;border-radius:50%;background:var(--maki);animation:bounce 1.1s ease-in-out infinite}.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}.thinking-text{font-size:.8125rem;font-weight:500;background:linear-gradient(90deg,var(--text) 0%,var(--text) 35%,var(--maki) 50%,var(--text) 65%,var(--text) 100%);background-size:200% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:shimmer 1.8s linear infinite}@keyframes bounce{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-5px);opacity:1}}@keyframes shimmer{0%{background-position:0% 0}to{background-position:-200% 0}}@keyframes avatar-pulse{0%,to{box-shadow:0 0 0 0 var(--accent-glow)}50%{box-shadow:0 0 0 6px transparent}}.composer{display:flex;align-items:flex-end;gap:8px;padding:12px 16px 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.icon{width:18px;height:18px}.mic{position:relative;width:44px;height:44px;flex-shrink:0;border-radius:50%;border:1px solid var(--border-hi);display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-text);cursor:pointer;transition:transform .14s ease,background .2s ease,color .2s ease,box-shadow .2s ease}.mic:hover{transform:translateY(-1px);background:var(--cta);color:#fff;border-color:transparent}.mic:active{transform:scale(.95)}.mic .icon{width:19px;height:19px}.mic .stop{display:none;fill:currentColor;width:15px;height:15px}.mic:after{content:"";position:absolute;top:-5px;right:-5px;bottom:-5px;left:-5px;border-radius:50%;border:2px solid transparent;transform:scale(calc(1 + var(--level) * .3));transition:transform 80ms linear,border-color .2s ease;pointer-events:none}.app[data-state=connecting] .mic{cursor:progress}.app[data-state=connecting] .mic:after{border-color:var(--accent) transparent transparent;animation:spin .9s linear infinite}.app:not([data-state=idle]):not([data-state=connecting]) .mic{border-color:transparent;color:#fff}.app:not([data-state=idle]):not([data-state=connecting]) .mic .start{display:none}.app:not([data-state=idle]):not([data-state=connecting]) .mic .stop{display:block}.app[data-state=listening] .mic{background:linear-gradient(135deg,#14b8a6,#0f766e);box-shadow:0 8px 20px -10px #0f766e99}.app[data-state=listening] .mic:after{border-color:var(--good);opacity:.5}.app[data-state=thinking] .mic{background:linear-gradient(135deg,#f59e0b,#c2620a)}.app[data-state=thinking] .mic:after{border-color:var(--warn) transparent;opacity:.6;animation:spin 1.6s linear infinite}.app[data-state=speaking] .mic{background:linear-gradient(135deg,#8b5cf6,#6d4fd8);box-shadow:0 8px 20px -10px #6d4fd899}.app[data-state=speaking] .mic:after{border-color:var(--maki);animation:pulse 1.2s ease-in-out infinite}.callbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 16px;padding:7px 8px 7px 12px;border-radius:12px;border:1px solid var(--border);background:var(--card-hi);animation:rise .2s ease}.call-state{display:inline-flex;align-items:center;gap:10px;min-width:0;font-size:.8125rem;font-weight:600}.app[data-state=listening] .call-state{color:var(--good)}.app[data-state=thinking] .call-state{color:var(--warn)}.app[data-state=speaking] .call-state{color:var(--maki)}.call-mute{height:30px;padding:0 10px}.call-mute[aria-pressed=true]{background:var(--bad-soft);border-color:var(--bad);color:var(--bad)}.eq{display:inline-flex;align-items:center;gap:2px;height:16px;flex-shrink:0}.eq i{width:3px;height:16px;border-radius:2px;background:currentColor;transform:scaleY(.25);transform-origin:center;transition:transform 90ms linear}.eq i:nth-child(1){--k: .5}.eq i:nth-child(2){--k: .9}.eq i:nth-child(3){--k: 1.2}.eq i:nth-child(4){--k: .8}.eq i:nth-child(5){--k: .55}.app[data-state=listening] .eq i{transform:scaleY(min(1,calc(.2 + var(--level) * var(--k) * 1.6)))}.app[data-state=speaking] .eq i{animation:wave .9s ease-in-out infinite;animation-delay:calc(var(--k) * -.6s)}.app[data-state=thinking] .eq i,.app[data-state=connecting] .eq i{animation:blink 1.2s ease-in-out infinite;animation-delay:calc(var(--k) * -.5s)}@keyframes wave{0%,to{transform:scaleY(.3)}50%{transform:scaleY(1)}}.chat-error{width:auto;margin:0 16px 8px}.msg-actions{display:flex;flex-wrap:wrap;gap:2px;margin:4px -8px -6px}.msg-action{display:inline-flex;align-items:center;gap:5px;height:28px;padding:0 8px;border:none;border-radius:8px;background:none;font-size:.75rem;font-weight:600;color:var(--maki);cursor:pointer;transition:background .15s ease,color .15s ease,opacity .15s ease}.msg-action:hover:not(:disabled){background:var(--accent-soft);color:var(--accent-text)}.msg-action:disabled{opacity:.4;cursor:default}.msg-action .icon{width:14px;height:14px}.msg-action[aria-pressed=true]{color:var(--bad)}.msg.playing{border-color:var(--border-hi);box-shadow:0 0 0 3px var(--maki-soft)}.msg-eq{height:10px;margin-left:8px;vertical-align:-1px;color:var(--maki)}.msg-eq i{width:2px;height:10px;animation:wave .9s ease-in-out infinite;animation-delay:calc(var(--k) * -.6s)}.callbar+.composer,.chat-error+.composer{border-top:none}@media (max-width: 860px){.composer{padding:10px 12px 12px}.composer textarea{font-size:16px}}@media (max-width: 860px){.app{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden}.topbar{position:relative;flex-shrink:0}.topbar-inner{flex-wrap:nowrap;gap:10px;padding:10px 12px}.menu-btn{display:grid}.brand{flex:1;gap:10px}.logo{width:34px;height:34px;border-radius:10px}.logo .icon{width:18px;height:18px}#mode{display:none}.layout{flex:1;min-height:0;display:flex;flex-direction:column;padding:0;gap:0}.chat{flex:1;min-height:0;border:none;border-radius:0;box-shadow:none}.chat-head{padding:10px 12px}.chat-head .icon-tile,.chat-head .panel-hint{display:none}.chat-head .panel-title{align-items:center}.log-wrap{flex:1;min-height:0;padding:16px 12px}.msg{max-width:88%}.callbar{margin:0 12px}.chat-error{margin:0 12px 8px}.composer{padding-bottom:max(12px,env(safe-area-inset-bottom,0px))}.side{position:fixed;z-index:40;inset:0 auto 0 0;width:min(400px,92vw);gap:12px;padding:0 12px 24px;overflow-y:auto;overscroll-behavior:contain;background:var(--page);box-shadow:0 0 60px -10px #0a0e1980;transform:translate(-102%);visibility:hidden;transition:transform .24s ease,visibility 0s linear .24s}.app.menu-open .side{transform:none;visibility:visible;transition:transform .24s ease}.app.menu-open .menu-scrim{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:39;padding:0;border:none;background:#0a0e1973;cursor:pointer}.side-head{display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:1;padding:12px 2px 10px;background:var(--page)}.side-title{font-size:1rem;font-weight:700}}@media (max-width: 420px){.sub{display:none}}@media (prefers-reduced-motion: reduce){.teachers .chip,.msg,.status:before,.msg.live .text:after,.dots i,.thinking-text,.msg.thinking:before,.mic:after,.eq i,.callbar{animation:none!important}.side,.chats{transition:none}}