:root{--bg-0: #0b0d12;--bg-1: #12151c;--bg-2: #181c25;--border: rgba(255, 255, 255, .06);--border-strong: rgba(255, 255, 255, .1);--text: #e8eaf0;--text-dim: #8a91a0;--text-faint: #545b6b;--accent: #7c5cff;--accent-soft: #a18aff;--accent-glow: rgba(124, 92, 255, .35);--record: #ff5470;--record-glow: rgba(255, 84, 112, .4);--speak: #33d9a6;--speak-glow: rgba(51, 217, 166, .35);--warn: #ffb13d;--error: #ff6565;--radius-lg: 22px;--radius-md: 16px;--radius-sm: 10px;--ease: cubic-bezier(.22, .61, .36, 1)}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;overscroll-behavior:none;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,sans-serif;background:var(--bg-0);color:var(--text);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}button{font-family:inherit;-webkit-tap-highlight-color:transparent}.tutor-app{position:relative;width:100%;height:100dvh;max-height:100dvh;max-width:480px;margin:0 auto;padding:20px 20px 24px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:16px;background:radial-gradient(1200px 600px at 50% -200px,rgba(124,92,255,.15),transparent 60%),radial-gradient(800px 400px at 100% 100%,rgba(51,217,166,.08),transparent 60%),var(--bg-0);overflow:hidden}.bg-orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.35;pointer-events:none;z-index:0}.bg-orb--one{width:280px;height:280px;top:-80px;left:-60px;background:radial-gradient(circle,var(--accent) 0%,transparent 70%)}.bg-orb--two{width:240px;height:240px;bottom:80px;right:-80px;background:radial-gradient(circle,var(--speak) 0%,transparent 70%)}.tutor-header{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;padding:4px 2px}.tutor-brand{display:flex;align-items:center;gap:10px}.tutor-brand__dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent-glow)}.tutor-brand__name{font-weight:600;font-size:16px;letter-spacing:-.2px}.tutor-hello{margin:0;font-size:14px;color:var(--text-dim)}.tutor-log{position:relative;z-index:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;display:flex;flex-direction:column;gap:10px;padding:18px;background:linear-gradient(180deg,var(--bg-2),var(--bg-1));border:1px solid var(--border);border-radius:var(--radius-lg);scroll-behavior:smooth}.tutor-log::-webkit-scrollbar{width:6px}.tutor-log::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}.tutor-log__empty{margin:auto;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px;color:var(--text-dim)}.tutor-log__empty-icon{font-size:36px;line-height:1;opacity:.8}.tutor-log__empty-title{margin:0;font-size:16px;font-weight:600;color:var(--text)}.tutor-log__empty-hint{margin:0;font-size:13px;line-height:1.45;color:var(--text-dim);max-width:280px}.msg{display:flex;flex-direction:column;gap:4px;padding:10px 14px;border-radius:14px;max-width:86%;font-size:14px;line-height:1.5;word-break:break-word;animation:msg-in .24s var(--ease)}@keyframes msg-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.msg__role{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.6px;opacity:.65}.msg__text{color:var(--text)}.msg--user{align-self:flex-end;background:linear-gradient(135deg,#7c5cff38,#7c5cff1a);border:1px solid rgba(124,92,255,.3)}.msg--user .msg__role{color:var(--accent-soft)}.msg--tutor{align-self:flex-start;background:#ffffff0a;border:1px solid var(--border-strong)}.msg--tutor .msg__role{color:var(--speak)}.tutor-controls{position:relative;z-index:1;display:grid;grid-template-rows:20px 156px 18px 32px;justify-items:center;align-items:center;gap:10px;padding:8px 0 4px}.tutor-status{display:inline-flex;align-items:center;gap:8px;padding:0 12px;font-size:13px;color:var(--text-dim);transition:color .18s var(--ease)}.tutor-status__dot{width:6px;height:6px;border-radius:50%;background:var(--text-faint);transition:background .18s var(--ease),box-shadow .18s var(--ease)}.tutor-status__text{line-height:20px;white-space:nowrap}.tutor-status[data-variant=idle] .tutor-status__dot,.tutor-status[data-variant=connected] .tutor-status__dot{background:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.tutor-status[data-variant=recording] .tutor-status__dot{background:var(--record);box-shadow:0 0 10px var(--record-glow);animation:dot-pulse 1.2s ease-in-out infinite}.tutor-status[data-variant=speaking] .tutor-status__dot{background:var(--speak);box-shadow:0 0 10px var(--speak-glow);animation:dot-pulse 1.2s ease-in-out infinite}.tutor-status[data-variant=connecting] .tutor-status__dot,.tutor-status[data-variant=initializing] .tutor-status__dot{background:var(--warn);animation:dot-pulse 1s ease-in-out infinite}.tutor-status[data-variant=denied] .tutor-status__dot,.tutor-status[data-variant=error] .tutor-status__dot{background:var(--error)}@keyframes dot-pulse{0%,to{opacity:1}50%{opacity:.35}}.talk-button{position:relative;width:140px;height:140px;border-radius:50%;border:none;background:linear-gradient(135deg,#1d2130,#14171f);color:var(--accent-soft);cursor:pointer;display:grid;place-items:center;touch-action:none;outline:none;transition:transform .18s var(--ease),color .18s var(--ease),background .22s var(--ease),box-shadow .22s var(--ease);box-shadow:0 18px 40px -12px #000000b3,0 0 0 1px var(--border-strong) inset,0 30px 60px -20px var(--accent-glow)}.talk-button:active:not(:disabled){transform:scale(.96)}.talk-button:disabled{cursor:not-allowed;pointer-events:none}.talk-button__ring{position:absolute;top:-8px;right:-8px;bottom:-8px;left:-8px;border-radius:50%;border:2px solid transparent;pointer-events:none;transition:border-color .22s var(--ease),opacity .22s var(--ease);opacity:0}.talk-button__icon{display:grid;place-items:center;color:inherit;transition:color .18s var(--ease),transform .18s var(--ease)}.talk-button[data-variant=idle],.talk-button[data-variant=connected]{color:var(--accent-soft)}.talk-button[data-variant=idle] .talk-button__ring,.talk-button[data-variant=connected] .talk-button__ring{border-color:var(--accent);opacity:.5}.talk-button[data-variant=recording]{color:var(--record);background:linear-gradient(135deg,#2a1820,#1a1013);box-shadow:0 18px 40px -12px #000000b3,0 0 0 1px #ff54704d inset,0 0 80px var(--record-glow)}.talk-button[data-variant=recording] .talk-button__ring{border-color:var(--record);opacity:1;animation:ring-pulse 1.4s var(--ease) infinite}.talk-button[data-variant=speaking]{color:var(--speak);background:linear-gradient(135deg,#152520,#101814)}.talk-button[data-variant=speaking] .talk-button__ring{border-color:var(--speak);opacity:1;animation:ring-pulse 1.6s var(--ease) infinite}.talk-button[data-variant=connecting],.talk-button[data-variant=initializing]{color:var(--warn)}.talk-button[data-variant=connecting] .talk-button__ring,.talk-button[data-variant=initializing] .talk-button__ring{border-color:var(--warn);opacity:.7;animation:ring-pulse 1.8s var(--ease) infinite}.talk-button[data-variant=denied],.talk-button[data-variant=error]{color:var(--text-faint);background:linear-gradient(135deg,#171a22,#10131a);box-shadow:0 18px 40px -12px #000000b3,0 0 0 1px var(--border-strong) inset}.talk-button[data-variant=denied] .talk-button__ring,.talk-button[data-variant=error] .talk-button__ring{border-color:var(--text-faint);opacity:.3}@keyframes ring-pulse{0%{transform:scale(1);opacity:1}70%{transform:scale(1.18);opacity:0}to{transform:scale(1.18);opacity:0}}.talk-button__label{font-size:12px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;color:var(--text-dim);text-align:center;line-height:18px;height:18px;transition:color .18s var(--ease)}.tutor-bottom-slot{display:flex;align-items:center;justify-content:center;height:32px}.link-button{background:transparent;color:var(--text-dim);border:1px solid var(--border-strong);border-radius:8px;padding:6px 14px;font-size:12px;font-weight:500;cursor:pointer;transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);white-space:nowrap}.link-button:hover,.link-button:active{color:var(--text);border-color:var(--accent);background:#7c5cff14}@media (max-height: 640px){.tutor-app{padding:12px 16px 16px;gap:12px}.tutor-controls{grid-template-rows:20px 120px 18px 32px;gap:8px}.talk-button{width:108px;height:108px}.bg-orb--two{bottom:40px}}.tutor-header__right{display:flex;align-items:center;gap:10px}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border:1px solid rgba(255,255,255,.08);border-radius:10px;background:#ffffff0a;color:var(--text-dim);cursor:pointer;transition:color .16s ease,background .16s ease,border-color .16s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.icon-button:hover{color:var(--text);background:#ffffff12;border-color:#ffffff24}.icon-button:active{transform:scale(.94)}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#06080e9e;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:flex-end;justify-content:center;animation:sheet-fade-in .18s ease-out}@keyframes sheet-fade-in{0%{opacity:0}to{opacity:1}}.sheet{width:100%;max-width:520px;max-height:86dvh;display:flex;flex-direction:column;background:linear-gradient(180deg,#181a24fa,#11131bfa);border-top-left-radius:22px;border-top-right-radius:22px;border-top:1px solid rgba(255,255,255,.08);box-shadow:0 -20px 60px #0000008c;animation:sheet-slide-up .26s cubic-bezier(.22,.8,.32,1);overflow:hidden}@keyframes sheet-slide-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sheet__header{position:relative;display:flex;align-items:center;justify-content:space-between;padding:18px 20px 10px;border-bottom:1px solid rgba(255,255,255,.05)}.sheet__header:before{content:"";position:absolute;top:6px;left:50%;transform:translate(-50%);width:40px;height:4px;border-radius:2px;background:#ffffff2e}.sheet__title{margin:0;font-size:17px;font-weight:600;letter-spacing:-.2px;color:var(--text)}.sheet__close{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:0;border-radius:8px;background:transparent;color:var(--text-dim);cursor:pointer;transition:color .14s ease,background .14s ease;-webkit-tap-highlight-color:transparent}.sheet__close:hover{color:var(--text);background:#ffffff0f}.sheet__content{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:16px 20px 8px;display:flex;flex-direction:column;gap:22px}.sheet__content::-webkit-scrollbar{width:6px}.sheet__content::-webkit-scrollbar-thumb{background:#ffffff14;border-radius:3px}.sheet__footer{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:12px 20px calc(14px + env(safe-area-inset-bottom,0px));border-top:1px solid rgba(255,255,255,.05)}.sheet-group{display:flex;flex-direction:column;gap:10px}.sheet-group__title{margin:0;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.6px;color:var(--text-faint)}.segmented{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:6px;padding:4px;border-radius:12px;background:#ffffff0a;border:1px solid rgba(255,255,255,.06)}.segmented__item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 6px;border:0;border-radius:9px;background:transparent;color:var(--text-dim);cursor:pointer;transition:background .16s ease,color .16s ease,transform .12s ease;-webkit-tap-highlight-color:transparent}.segmented__item:active{transform:scale(.97)}.segmented__item.is-active{background:linear-gradient(180deg,#7c5cff47,#7c5cff29);color:var(--text);box-shadow:0 2px 12px #7c5cff47,inset 0 0 0 1px #a18aff59}.segmented__label{font-size:14px;font-weight:600;letter-spacing:-.1px}.segmented__hint{font-size:11px;color:var(--text-faint);line-height:1.2}.segmented__item.is-active .segmented__hint{color:var(--accent-soft)}.role-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.role-chip{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:12px 6px;border:1px solid rgba(255,255,255,.06);border-radius:12px;background:#ffffff08;color:var(--text-dim);cursor:pointer;transition:border-color .16s ease,background .16s ease,color .16s ease,transform .12s ease;-webkit-tap-highlight-color:transparent;min-height:72px}.role-chip:active{transform:scale(.96)}.role-chip.is-active{border-color:#a18aff8c;background:linear-gradient(180deg,#7c5cff38,#7c5cff1a);color:var(--text);box-shadow:0 2px 14px #7c5cff38}.role-chip__emoji{font-size:22px;line-height:1}.role-chip__label{font-size:11px;font-weight:500;text-align:center;line-height:1.2}@media (max-width: 380px){.role-grid{grid-template-columns:repeat(3,1fr)}}.sheet-input{margin-top:4px;width:100%;padding:12px 14px;border:1px solid rgba(255,255,255,.1);border-radius:10px;background:#ffffff0a;color:var(--text);font-size:14px;font-family:inherit;outline:none;transition:border-color .16s ease,background .16s ease}.sheet-input::placeholder{color:var(--text-faint)}.sheet-input:focus{border-color:#a18aff8c;background:#7c5cff14}.switch-row{position:relative;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;border-radius:12px;background:#ffffff0a;border:1px solid rgba(255,255,255,.06);cursor:pointer;-webkit-tap-highlight-color:transparent}.switch-row__text{display:flex;flex-direction:column;gap:3px;min-width:0}.switch-row__title{font-size:14px;font-weight:500;color:var(--text)}.switch-row__hint{font-size:12px;color:var(--text-faint);line-height:1.35}.switch-row__input{position:absolute;opacity:0;width:0;height:0;pointer-events:none}.switch{position:relative;flex:0 0 auto;width:44px;height:26px;border-radius:13px;background:#ffffff1f;transition:background .18s ease}.switch:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0000004d;transition:transform .2s cubic-bezier(.3,.8,.4,1)}.switch-row__input:checked~.switch{background:var(--accent)}.switch-row__input:checked~.switch:after{transform:translate(18px)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border:0;border-radius:12px;font-size:15px;font-weight:600;font-family:inherit;letter-spacing:-.1px;cursor:pointer;transition:background .16s ease,color .16s ease,transform .12s ease,opacity .16s ease;-webkit-tap-highlight-color:transparent}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--accent);color:#fff;box-shadow:0 4px 20px #7c5cff59}.btn--primary:hover:not(:disabled){background:var(--accent-soft)}.btn--ghost{background:#ffffff0d;color:var(--text);border:1px solid rgba(255,255,255,.08)}.btn--ghost:hover{background:#ffffff17}