*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f0f1a;--bg2: #1a1a2e;--bg3: #16213e;--accent: #4f8ef7;--accent2: #7c5cbf;--text: #e8e8f0;--text2: #9090b0;--bubble-ai: #1e2a45;--bubble-user: #2d4a8a;--card: #1e1e32;--border: #2a2a45;--error: #e94560;--success: #4caf82;--radius: 16px}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px;line-height:1.5;height:100dvh;overflow:hidden}#root{height:100dvh}.app{display:flex;flex-direction:column;height:100dvh;max-width:640px;margin:0 auto;background:var(--bg2)}.avatar-area{display:flex;flex-direction:column;align-items:center;padding:16px 16px 8px;background:linear-gradient(180deg,var(--bg3) 0%,var(--bg2) 100%);border-bottom:1px solid var(--border);flex-shrink:0}.avatar-wrapper{display:flex;flex-direction:column;align-items:center;gap:8px}.avatar-glow{border-radius:50%;padding:4px;background:linear-gradient(135deg,#2a2a4a,#1e1e3a);box-shadow:0 0 20px #4f8ef726;transition:box-shadow .3s}.avatar-glow.talking{box-shadow:0 0 30px #4f8ef780,0 0 60px #7c5cbf4d;animation:pulse .8s ease-in-out infinite alternate}@keyframes pulse{0%{box-shadow:0 0 20px #4f8ef766}to{box-shadow:0 0 40px #4f8ef7cc,0 0 70px #7c5cbf66}}.mouth-open{animation:mouth-anim .25s ease-in-out infinite alternate}@keyframes mouth-anim{0%{ry:3}to{ry:8}}.avatar-caption{max-width:300px;background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:6px 12px;font-size:13px;color:var(--text2);text-align:center;line-height:1.4}.session-info{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:6px}.session-tag{font-size:11px;background:var(--bg3);border:1px solid var(--border);border-radius:20px;padding:2px 10px;color:var(--text2)}.chat-area{flex:1;overflow-y:auto;padding:16px 12px;display:flex;flex-direction:column;gap:10px;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.chat-area::-webkit-scrollbar{width:4px}.chat-area::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.bubble-row{display:flex;align-items:flex-end;gap:8px}.bubble-row.user{flex-direction:row-reverse}.bubble-avatar-thumb{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;flex-shrink:0;color:#fff}.bubble{max-width:72%;padding:10px 14px;border-radius:18px;font-size:14px;line-height:1.5}.bubble-ai{background:var(--bubble-ai);border-bottom-left-radius:4px;color:var(--text)}.bubble-user{background:var(--bubble-user);border-bottom-right-radius:4px;color:#fff}.loading-bubble{display:flex;align-items:center;gap:4px;padding:12px 16px}.dot{width:7px;height:7px;background:var(--text2);border-radius:50%;display:inline-block;animation:bounce 1.2s infinite ease-in-out}.dot:nth-child(1){animation-delay:0s}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:scale(.7);opacity:.5}40%{transform:scale(1);opacity:1}}.model-answer-card{margin:0 12px 8px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;flex-shrink:0}.model-answer-toggle{width:100%;background:none;border:none;color:var(--accent);font-size:13px;font-weight:600;padding:10px 14px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;text-align:left}.model-answer-toggle:hover{background:#4f8ef714}.toggle-icon{font-size:10px;color:var(--text2)}.model-answer-body{display:flex;align-items:center;gap:10px;padding:8px 14px 12px;border-top:1px solid var(--border)}.model-answer-text{flex:1;font-size:14px;color:var(--text);font-style:italic}.speak-btn{background:none;border:1px solid var(--border);border-radius:8px;padding:4px 8px;cursor:pointer;font-size:16px;transition:background .2s;flex-shrink:0}.speak-btn:hover{background:#ffffff14}.error-bar{margin:0 12px 8px;background:#e9456026;border:1px solid rgba(233,69,96,.4);border-radius:10px;padding:10px 14px;display:flex;align-items:center;gap:10px;font-size:13px;color:#ff8099;flex-shrink:0}.error-bar span{flex:1}.error-bar button{background:#e9456040;border:1px solid rgba(233,69,96,.5);border-radius:6px;color:#ff8099;padding:4px 10px;cursor:pointer;font-size:12px}.text-input-form{display:flex;gap:8px;margin:0 12px 8px;flex-shrink:0}.text-input-form input{flex:1;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:10px 14px;color:var(--text);font-size:14px;outline:none}.text-input-form input:focus{border-color:var(--accent)}.text-input-form button{background:var(--accent);border:none;border-radius:10px;padding:10px 16px;color:#fff;font-size:14px;font-weight:600;cursor:pointer}.text-input-form button:disabled{opacity:.4;cursor:not-allowed}.control-bar{background:var(--bg3);border-top:1px solid var(--border);padding:12px 16px;flex-shrink:0}.control-bar-inner{display:flex;align-items:center;gap:16px;max-width:600px;margin:0 auto}.mic-section{display:flex;flex-direction:column;align-items:center;gap:4px}.mic-btn{width:56px;height:56px;border-radius:50%;border:2px solid var(--accent);background:#4f8ef726;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:22px;transition:all .2s}.mic-btn:hover{background:#4f8ef74d}.mic-btn:disabled{opacity:.4;cursor:not-allowed}.mic-btn.listening{background:#e9456033;border-color:var(--error);animation:mic-pulse 1s ease-in-out infinite alternate}@keyframes mic-pulse{0%{box-shadow:0 0 #e9456066}to{box-shadow:0 0 0 10px #e9456000}}.mic-icon{font-size:22px}.mic-icon.recording{font-size:18px;color:var(--error)}.mic-label{font-size:10px;color:var(--text2);white-space:nowrap}.mic-unsupported{font-size:11px;color:var(--error);text-align:center}.speed-section{flex:1;display:flex;flex-direction:column;gap:4px}.speed-label{font-size:11px;color:var(--text2)}.speed-slider{width:100%;accent-color:var(--accent);cursor:pointer}.lang-switch-section{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden;flex-shrink:0}.lang-switch-btn{background:none;border:none;color:var(--text2);padding:6px 12px;cursor:pointer;font-size:12px;font-weight:600;transition:all .2s}.lang-switch-btn.active{background:var(--accent);color:#fff}.topic-change-btn{background:none;border:1px solid var(--border);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:16px;color:var(--text2);flex-shrink:0;transition:background .2s}.topic-change-btn:hover{background:#ffffff14}.setup-screen{min-height:100dvh;background:var(--bg);display:flex;align-items:center;justify-content:center;padding:20px}.setup-card{background:var(--bg2);border:1px solid var(--border);border-radius:24px;padding:32px 28px;max-width:480px;width:100%;display:flex;flex-direction:column;gap:28px}.setup-header{text-align:center}.setup-icon{font-size:40px;margin-bottom:10px}.setup-header h1{font-size:22px;font-weight:700;color:var(--text);margin-bottom:6px}.setup-header p{font-size:14px;color:var(--text2)}.setup-section h2{font-size:13px;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}.lang-buttons{display:flex;gap:10px}.lang-btn{flex:1;padding:12px;border:2px solid var(--border);border-radius:var(--radius);background:var(--card);color:var(--text);font-size:15px;font-weight:600;cursor:pointer;transition:all .2s}.lang-btn:hover{border-color:var(--accent)}.lang-btn.active{border-color:var(--accent);background:#4f8ef726;color:var(--accent)}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:10px}.topic-btn{padding:10px 6px;border:1px solid var(--border);border-radius:10px;background:var(--card);color:var(--text2);font-size:12px;cursor:pointer;transition:all .2s;text-align:center}.topic-btn:hover{border-color:var(--accent);color:var(--text)}.topic-btn.active{border-color:var(--accent);background:#4f8ef726;color:var(--accent)}.custom-topic input{width:100%;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:10px 14px;color:var(--text);font-size:14px;outline:none;transition:border-color .2s}.custom-topic input:focus{border-color:var(--accent)}.custom-topic input::placeholder{color:var(--text2)}.level-buttons{display:flex;gap:10px}.level-btn{flex:1;padding:10px;border:1px solid var(--border);border-radius:10px;background:var(--card);color:var(--text2);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s}.level-btn:hover{border-color:var(--accent2);color:var(--text)}.level-btn.active{border-color:var(--accent2);background:#7c5cbf33;color:#a882e8}.start-btn{width:100%;padding:16px;background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;border-radius:var(--radius);color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:opacity .2s,transform .1s}.start-btn:hover{opacity:.92;transform:translateY(-1px)}.start-btn:active{transform:translateY(0)}