.teacher-intro h1{margin-top:9px}.teacher-intro .secondary{font-size:11px}.call-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(290px,1fr);gap:22px}.call-main{min-width:0}
.call-stage{position:relative;aspect-ratio:4/3;border-radius:22px;overflow:hidden;isolation:isolate;background:radial-gradient(ellipse at 50% 40%,#fbf3df 0,#e6d4b8 70%,#c5b591 100%)}.call-stage:after{content:'';position:absolute;inset:0;background:linear-gradient(#283f331a,transparent 24%,transparent 63%,#263e32b8);pointer-events:none;z-index:2}.teacher-canvas{position:absolute;bottom:-7%;left:0;width:100%;height:110%;object-fit:contain;z-index:1}.room-window{position:absolute;top:14%;left:-6%;width:26%;height:58%;border:10px solid #f6f0e2;box-shadow:0 8px 30px #6d765623;background:linear-gradient(120deg,#c5d9c0,#e3e9c9);transform:perspective(500px) rotateY(8deg);border-radius:4px}.room-window:after{content:'';position:absolute;top:44%;height:7px;left:0;right:0;background:#f6f0e2}.room-plant{position:absolute;right:4%;bottom:0;width:54px;height:36%;background:linear-gradient(90deg,transparent 45%,#82936e 45%,#82936e 50%,transparent 50%)}.room-plant i{position:absolute;width:36px;height:65px;background:#839a72;border-radius:100% 0 100% 0;transform:rotate(-20deg);top:0;left:-8px}.room-plant i:nth-child(2){transform:rotate(70deg);top:35px;left:25px;background:#9aab83}.room-plant i:nth-child(3){top:80px;left:-8px;background:#a8b38f}
.call-top,.call-bottom{position:absolute;left:20px;right:20px;z-index:3;display:flex;justify-content:space-between;align-items:center;gap:10px;color:white}.call-top{top:18px}.ai-label{border:1px solid #ffffff70;background:#385448a3;border-radius:6px;padding:5px 8px;font-size:9px;letter-spacing:1px;backdrop-filter:blur(8px)}.call-status{font-size:10px;background:#fcfff8ed;border-radius:20px;padding:6px 10px;color:#526447;display:flex;align-items:center;gap:6px}.call-status:before{content:'';width:6px;height:6px;background:#a7ad98;border-radius:50%}.call-status.online:before{background:#709448}.call-bottom{bottom:20px;align-items:end}.call-bottom strong{font-size:17px;font-weight:500;display:block;text-shadow:0 1px 12px #17352a45}.call-bottom span:not(.call-clock){font-size:11px;color:#f1f5e9;display:block;margin-top:5px}.call-clock{font-size:12px;font-variant-numeric:tabular-nums;color:#fff;background:#284b3e7d;border-radius:6px;padding:5px 8px}.voice-indicator{position:absolute;left:50%;bottom:28%;transform:translateX(-50%);display:flex;align-items:center;gap:3px;background:#fff9;border:1px solid #fff8;padding:6px 10px;border-radius:20px;z-index:3;opacity:0;transition:opacity .15s}.voice-indicator.active{opacity:1}.voice-indicator i{width:3px;height:11px;border-radius:3px;background:#527c55;animation:voice-pulse .6s ease-in-out infinite alternate}.voice-indicator i:nth-child(2){animation-delay:.17s}.voice-indicator i:nth-child(3){animation-delay:.32s}.voice-indicator i:nth-child(4){animation-delay:.23s}.voice-indicator i:nth-child(5){animation-delay:.1s}@keyframes voice-pulse{to{height:3px}}
.call-toolbar{border:1px solid var(--line);border-radius:14px;background:white;display:flex;justify-content:space-between;align-items:center;gap:9px;padding:15px;margin-top:12px}.call-control{display:flex;align-items:center;flex-direction:column;gap:5px;font-size:10px;color:#71865e;padding:4px 6px;min-width:42px}.call-control svg{width:19px;height:19px}.call-control.recording{color:#bc6d51}.call-control.is-muted{color:#ac805c}.call-hangup{color:#b1775f}.call-start{display:flex;align-items:center;justify-content:center;gap:8px;background:var(--green);color:white;border-radius:10px;padding:13px 16px;font-size:12px;font-weight:500;flex:1;max-width:240px}.call-start svg{width:17px;height:17px}.call-start:hover{background:#326650}.call-start:disabled{transform:none}.speech-stop{display:flex;align-items:center;justify-content:center;gap:7px;font-size:11px;color:#627d4c;margin:12px auto 0;padding:5px}.speech-stop svg{width:13px;height:13px}
.teacher-topic{background:white;border:1px solid var(--line);border-radius:14px;padding:20px;margin-top:18px}.teacher-topic-heading{display:flex;justify-content:space-between;align-items:center;gap:8px}.teacher-topic-heading .section-label{margin:0;font-size:9px}.topic-level{font-size:10px;color:#869674}.topic-choices{display:flex;gap:8px;margin-top:15px;flex-wrap:wrap}.topic-choices button{font-size:12px;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;gap:6px;padding:9px 12px;color:#7c8d69}.topic-choices button svg{width:14px;height:14px}.topic-choices button.active{border-color:#b3c584;background:#eef4e0;color:#526f37}.teacher-topic p{font-size:12px;line-height:1.8;color:#7b8c6c;margin-top:12px}.conversation-progress{font-size:10px;color:#8a987a;margin-top:16px}.conversation-progress>div{height:4px;background:#f0f3e8;border-radius:3px;margin-top:8px;overflow:hidden}.conversation-progress i{display:block;height:100%;width:0;background:#adc47b;transition:width .3s}.tutor-summary{border:1px solid #dce6cc;background:#f0f5e6;border-radius:14px;padding:20px;margin-top:16px}.tutor-summary .eyebrow{font-size:8px}.tutor-summary h3{font-size:15px;font-weight:500;margin:10px 0}.tutor-summary ul{padding-left:18px;font-size:12px;line-height:2;color:#567345}.tutor-summary p{font-size:10px;line-height:1.8;color:#859473;margin-top:10px}
.call-chat{display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:20px;min-height:660px;max-height:850px;overflow:hidden}.call-chat-heading{padding:20px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.call-chat-heading strong{font-size:15px;font-weight:500;display:block}.call-chat-heading small{font-size:10px;color:#8b9a7b;display:block;margin-top:4px}.call-messages{flex:1;overflow:auto;padding:20px;min-height:220px;scrollbar-width:thin}.chat-welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;height:100%;min-height:260px;color:#819370}.chat-welcome>svg{width:31px;height:31px;margin-bottom:17px;color:#a8bb7d}.chat-welcome h3{font-weight:400;font-size:20px;line-height:1.5;color:#5d7750}.chat-welcome p{font-size:12px;line-height:1.8;margin:12px 0;max-width:230px}.connection-note{font-size:10px;line-height:1.8;background:#f6f2e7;border-radius:8px;padding:11px 13px;color:#927e50;max-width:240px;margin-top:9px}.call-shortcuts{display:flex;gap:6px;padding:10px 16px 5px;flex-wrap:wrap}.call-shortcuts button{border:1px solid var(--line);border-radius:15px;padding:7px 10px;font-size:10px;color:#778b5d;background:#fcfdf8}.call-shortcuts button[aria-pressed=true]{background:#eaf1dd;border-color:#becf99}.call-composer{margin:10px 15px 0;display:flex;align-items:end;border:1px solid #e4e9db;border-radius:11px;padding:10px;background:#fbfcf7;gap:6px}.call-composer textarea{width:100%;resize:none;border:0;background:none;min-height:44px;font-size:12px;color:var(--ink);outline-offset:0}.call-composer textarea::placeholder{color:#9ca88f}.send-message{width:32px;height:32px;display:grid;place-items:center;border-radius:8px;background:var(--green);color:white;flex-shrink:0}.send-message svg{width:16px;height:16px}.call-privacy{font-size:9px;line-height:1.8;color:#87967a;padding:12px 18px 17px}.teacher-under{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:10px;color:#8b9a7b;margin:19px 2px}.teacher-under span{display:flex;align-items:center;gap:6px}.teacher-under svg{width:14px;height:14px}.chat-message{padding:13px 14px;border-radius:13px;margin-bottom:12px;background:#f0f4e8;max-width:94%;overflow-wrap:anywhere}.chat-message.user{background:#edf0f6;margin-left:auto}.chat-message small{font-size:9px;color:#778f5f;display:block;margin-bottom:5px}.chat-message.user small{color:#7e8ea8}.chat-message p{font-size:13px;line-height:1.8;white-space:pre-wrap}.chat-message .chat-translation{font-size:11px;color:#839270;border-top:1px solid #dce5cc;margin-top:9px;padding-top:7px}.teacher-hint{padding:12px 15px;border:1px solid #e6dbb9;border-radius:10px;background:#faf7eb;margin:0 15px 3px}.teacher-hint small{font-size:8px;letter-spacing:1px;color:#a19265}.teacher-hint p{font-size:12px;line-height:1.7;margin-top:5px;color:#7f7959}.call-error{font-size:12px;line-height:1.8;background:#faf0e5;color:#9b734e;border:1px solid #eddac0;padding:12px 15px;border-radius:11px;margin-top:12px}
.teacher-invitation{display:flex;align-items:center;gap:18px;border:1px solid #e0e6d5;border-radius:16px;background:#f2f5e9;padding:18px 20px;margin:25px 0}.teacher-thumb{width:64px;height:64px;background:#e8ddc6 url('assets/teacher-expressions.png') left top/300% 200% no-repeat;border-radius:50%;flex-shrink:0;border:3px solid white;display:block}.teacher-invitation strong{font-size:15px;font-weight:500;display:block}.teacher-invitation p{font-size:11px;color:#82936e;margin-top:5px}.teacher-invitation .secondary{margin-left:auto;white-space:nowrap;font-size:11px}.teacher-invitation .teacher-tag{font-size:8px;letter-spacing:1px;color:#8e9e6f;display:block;margin-bottom:3px}
@media(max-width:1150px){.call-layout{grid-template-columns:minmax(0,1.2fr) minmax(260px,1fr);gap:17px}.call-toolbar{padding:12px 8px;gap:5px}.call-start{font-size:11px;padding:12px 9px}.call-control{font-size:9px;min-width:30px}.call-top,.call-bottom{left:16px;right:16px}.ai-label{font-size:8px;letter-spacing:.5px}.call-status{font-size:9px}.call-chat{min-height:600px}.call-chat-heading{padding:17px}.call-messages{padding:16px}.teacher-under{font-size:9px}.teacher-invitation strong{font-size:13px}}
@media(max-width:950px){.call-layout{grid-template-columns:1fr}.call-chat{min-height:450px;max-height:650px}.call-stage{aspect-ratio:4/3}.call-main{display:grid;grid-template-columns:1fr}.teacher-topic{margin-top:15px}.call-toolbar{justify-content:center;gap:20px;padding:15px}.call-start{max-width:260px;font-size:12px}.call-control{font-size:10px}.call-messages{min-height:180px;max-height:320px}.chat-welcome{min-height:180px}.chat-welcome h3 br{display:none}.teacher-invitation{gap:13px;flex-wrap:wrap}.teacher-invitation .secondary{margin-left:77px}}
@media(max-width:700px){.teacher-intro{align-items:start;gap:9px}.teacher-intro h1{font-size:26px;margin-top:8px}.teacher-intro .eyebrow{font-size:7px;letter-spacing:1px}.teacher-intro p{font-size:12px}.teacher-intro .secondary{font-size:0;padding:9px;min-height:35px;margin-top:3px}.teacher-intro .secondary svg{width:16px;height:16px}.call-stage{border-radius:16px;aspect-ratio:1/1}.teacher-canvas{height:104%;bottom:-2%}.call-top{top:15px}.ai-label{font-size:8px}.call-status{font-size:10px}.call-bottom strong{font-size:17px}.call-bottom span:not(.call-clock){font-size:10px;max-width:240px;line-height:1.5}.call-clock{font-size:10px}.call-toolbar{gap:12px;padding:14px 10px}.call-start{font-size:11px;line-height:1.5;padding:10px 11px;min-height:43px}.call-start svg{display:none}.call-control{font-size:9px;padding:4px;min-width:34px}.call-control svg{width:18px;height:18px}.teacher-topic{padding:17px}.teacher-topic-heading .section-label{font-size:8px}.topic-level{font-size:9px}.topic-choices button{font-size:12px}.call-chat{border-radius:16px;min-height:460px}.call-chat-heading strong{font-size:15px}.chat-welcome h3{font-size:19px}.connection-note{font-size:11px;max-width:260px}.call-shortcuts button{font-size:11px}.call-composer textarea{font-size:14px;min-height:48px}.call-privacy{font-size:10px}.chat-message p{font-size:14px}.chat-message .chat-translation{font-size:12px}.chat-message small{font-size:10px}.teacher-under{font-size:9px;align-items:start}.teacher-under span:last-child{max-width:150px;text-align:right;display:block}.teacher-invitation{padding:17px 15px;gap:12px}.teacher-thumb{width:54px;height:54px}.teacher-invitation>div{flex:1;min-width:170px}.teacher-invitation strong{font-size:14px}.teacher-invitation p{font-size:11px;line-height:1.7}.teacher-invitation .secondary{margin-left:66px;font-size:11px}.nav-item{min-width:0}.nav-item>span:not(.count){text-align:center;line-height:1.25}}
@media(prefers-reduced-motion:reduce){.voice-indicator i{animation:none}.conversation-progress i{transition:none}}
.teacher-intro-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.voice-preview-note{font-size:11px!important;color:#6c8057;margin:16px 0 0;line-height:1.8}.voice-settings-help{font-size:11px!important;color:#81916e;margin-top:18px;line-height:1.9}
@media(max-width:700px){.teacher-intro-actions{flex-wrap:nowrap}.teacher-intro .teacher-voice-button{font-size:11px;gap:5px;display:flex;align-items:center}.voice-preview-note,.voice-settings-help{font-size:12px!important}}