*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);height:100vh;overflow:hidden}.app{max-width:1200px;margin:0 auto;padding:16px;height:100vh;display:flex;flex-direction:column;overflow:hidden}.app-header{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;padding:12px 24px;margin-bottom:12px;box-shadow:0 4px 20px #0000001a;animation:slideDown .5s ease;flex-shrink:0}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.brand{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}.header-actions{display:flex;align-items:center;gap:20px}.about-btn{padding:8px 16px;background:#667eea1a;border:1px solid rgba(102,126,234,.3);border-radius:8px;color:#667eea;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.about-btn:hover{background:#667eea33;transform:translateY(-2px);box-shadow:0 4px 12px #667eea33}.logo{display:flex;align-items:center;gap:12px}.logo-image{height:40px;width:auto;object-fit:contain}.logo h1{font-size:24px;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0}.language-selector{display:flex;flex-direction:column;align-items:flex-end;gap:4px}.current-lang{font-size:16px;font-weight:600;color:#667eea}.more-coming{font-size:12px;color:#888;font-style:italic}.main-container{flex:1;display:flex;flex-direction:column;gap:0;height:calc(100vh - 100px);overflow:hidden}.chat-interface{flex:1;background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px 16px 0 0;padding:16px;box-shadow:0 4px 20px #0000001a;display:flex;flex-direction:column;overflow:hidden;animation:slideInLeft .6s ease}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.messages-container{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding-right:8px;margin:-4px}.messages-container::-webkit-scrollbar{width:4px}.messages-container::-webkit-scrollbar-track{background:#0000000d;border-radius:10px}.messages-container::-webkit-scrollbar-thumb{background:#667eea4d;border-radius:10px}.messages-container::-webkit-scrollbar-thumb:hover{background:#667eea80}.empty-state{flex:1;display:flex;align-items:center;justify-content:center;color:#6c757d;font-size:16px}.message{display:flex;flex-direction:column;max-width:85%;animation:slideInBounce .5s cubic-bezier(.68,-.55,.265,1.55);padding:4px;font-size:.95em}@keyframes slideInBounce{0%{opacity:0;transform:translateY(30px) scale(.9)}to{opacity:1;transform:translateY(0) scale(1)}}.message.user{align-self:flex-end}.message.bot{align-self:flex-start}.message-content{padding:16px 20px;border-radius:16px;margin-bottom:5px;font-size:16px;line-height:1.6}.message.user .message-content{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;animation:shimmer 3s ease-in-out infinite;background-size:200% 200%}@keyframes shimmer{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.message.bot .message-content{background:#fff;color:#1a1a1a;border:2px solid #e0e0e0;animation:fadeInUp .4s ease}@keyframes fadeInUp{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.message-text{font-size:15px;line-height:1.5;word-wrap:break-word}.timestamp{font-size:11px;color:#495057;padding:0 20px}.translation-toggle{margin-top:10px;padding:8px 16px;background:#667eea;border:none;border-radius:8px;color:#fff;font-size:13px;cursor:pointer;transition:all .2s;font-weight:500}.translation-toggle+.translation-toggle{margin-left:10px}.translation-toggle:hover{background:#764ba2;transform:translateY(-2px) scale(1.02);box-shadow:0 4px 12px #667eea66}.translation-box{margin-top:10px;padding:12px;background:#e7f3ff;border-radius:8px;font-size:15px;color:#1a1a1a;font-style:italic;border:1px solid #b3d9ff;line-height:1.6;animation:expandDown .3s ease}@keyframes expandDown{0%{opacity:0;max-height:0;padding:0 12px}to{opacity:1;max-height:200px;padding:12px}}.message.user .translation-box{background:#2d1b4e;color:#fff;border:1px solid #ffffff}.grammar-suggestion-box{margin-top:10px;padding:12px;background:#fff4e6;border-radius:8px;font-size:14px;color:#1a1a1a;border:1px solid #ffd699;border-left:3px solid #ff9500}.grammar-suggestion-box strong{display:block;margin-bottom:6px;color:#cc7a00;font-size:13px}.grammar-suggestion-box p{margin:0;line-height:1.6;color:#4a4a4a}.phonemes-display{margin-top:8px;padding:8px;background:#f8f9fa;border-radius:6px;font-size:12px;border:1px solid #dee2e6;animation:fadeIn .4s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.phonemes-display strong{color:#495057;display:block;margin-bottom:6px;font-size:11px;text-transform:uppercase}.word-phonemes-detailed{margin:6px 0;padding:6px;background:#fff;border-radius:6px;border:1px solid #e9ecef;animation:slideInRight .3s ease}@keyframes slideInRight{0%{opacity:0;transform:translate(-10px)}to{opacity:1;transform:translate(0)}}.word-header{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:4px}.phoneme-word{font-weight:600;font-size:13px;color:#333}.word-score{padding:2px 8px;border-radius:10px;font-size:10px;font-weight:600}.word-timing{font-size:9px;color:#6c757d;background:#e9ecef;padding:1px 4px;border-radius:3px;font-family:monospace}.error-type{font-size:10px;color:#dc3545;background:#f8d7da;padding:1px 4px;border-radius:3px}.score-good{background:#10b981;color:#fff}.score-ok{background:#f59e0b;color:#fff}.score-bad{background:#ef4444;color:#fff}.phoneme-breakdown{margin-top:4px}.phoneme-label{font-size:10px;font-weight:600;color:#495057;margin-bottom:4px;display:block}.phoneme-list{display:flex;flex-direction:column;gap:4px}.phoneme-detail{display:flex;flex-direction:column;gap:4px;padding:4px;background:#f8f9fa;border-radius:4px;font-size:11px;color:#212529;border:1px solid #dee2e6;margin-bottom:4px}.phoneme-header{display:flex;align-items:center;gap:4px}.phoneme-analysis-details{display:flex;flex-direction:column;gap:2px;padding:4px;background:#fff;border-radius:3px;border-left:2px solid #0d6efd;font-size:10px}.what-you-said{font-size:11px;color:#d63384;font-weight:500;padding:2px 0}.common-badge{display:inline-block;margin-left:4px;padding:1px 4px;background:#ffc107;color:#000;border-radius:3px;font-size:9px;font-weight:700}.phoneme-feedback{font-size:10px;color:#495057;padding:1px 0}.phoneme-tip{font-size:10px;color:#0d6efd;background:#e7f1ff;padding:3px 6px;border-radius:3px;margin-top:2px}.word-tips{margin-top:4px;padding:4px;background:#d1ecf1;border-radius:4px;border-left:2px solid #0c5460}.word-tip{font-size:11px;color:#0c5460;font-weight:500;padding:1px 0}.phoneme{font-family:Courier New,monospace;font-weight:600;padding:2px 6px;border-radius:4px}.phoneme-good{background:#10b981;color:#fff}.phoneme-ok{background:#f59e0b;color:#fff}.phoneme-bad{background:#ef4444;color:#fff}.phoneme-detail.phoneme-active{background:#3b82f626;border:2px solid #3b82f6}.phoneme-time{font-size:10px;color:#6c757d;background:#e9ecef;padding:2px 6px;border-radius:4px;font-family:monospace}.phoneme.phoneme-playing{box-shadow:0 0 10px currentColor;transform:scale(1.15);animation:pulse-glow .5s ease-in-out infinite}@keyframes pulse-glow{0%,to{box-shadow:0 0 10px currentColor}50%{box-shadow:0 0 20px currentColor}}.feedback{margin-top:8px;padding:8px;background:#e7f3ff;border-radius:6px;border:1px solid #b3d9ff;animation:expandIn .4s ease}@keyframes expandIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.scores{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:6px}.scores span{padding:3px 8px;background:#fff;border-radius:6px;font-size:10px;font-weight:600;color:#0056b3;border:1px solid #cce5ff}.ai-evaluation{margin-top:6px;padding:6px;background:#f3e8ff;border-left:2px solid #8b5cf6;border-radius:4px;font-size:11px}.ai-evaluation strong{color:#6b21a8;display:block;margin-bottom:4px;font-size:10px;text-transform:uppercase}.ai-evaluation p{color:#1a1a1a;margin:0;font-size:11px}.pronunciation-issues{margin-top:6px;padding:6px;background:#fff3cd;border-left:2px solid #ffc107;border-radius:4px}.pronunciation-issues strong{color:#856404;display:block;margin-bottom:4px;font-weight:600;font-size:10px}.word-issue{margin:4px 0;padding:4px;background:#fff;border-radius:3px;border:1px solid #ffeaa7;color:#1a1a1a;font-size:11px}.issue-word{font-weight:600;color:#d63384;margin-right:4px;font-size:11px}.issue-score{color:#6c757d;font-size:10px}.phoneme-issues{margin-top:2px;font-size:10px;color:#495057;padding:2px 0}.suggestions{margin-top:6px;padding:6px;background:#d1ecf1;border-left:2px solid #0c5460;border-radius:4px}.suggestions strong{color:#0c5460;display:block;margin-bottom:4px;font-weight:600;font-size:10px}.suggestions ul{margin:4px 0 0 12px;padding:0}.suggestions li{margin:2px 0;color:#0c5460;font-size:11px}.encouragement{margin-top:6px;padding:6px;background:#d4edda;border-left:2px solid #28a745;border-radius:4px;color:#155724;font-weight:500;font-size:11px}.message-error .message-content{background:#ef44441a!important;border:2px solid #ef4444!important;color:#dc2626!important}.error-suggestions{margin-top:10px;padding:10px;background:#fff5f5;border-left:3px solid #ef4444;border-radius:6px;font-size:12px}.error-suggestions strong{color:#dc2626;display:block;margin-bottom:6px}.error-suggestions ul{margin:6px 0 0 16px;padding:0}.error-suggestions li{margin:4px 0;color:#7f1d1d}.language-mismatch-warning{margin:12px 0;padding:15px;background:#fff5f5;border:2px solid #ef4444;border-radius:8px}.warning-header{font-size:14px;font-weight:700;color:#dc2626;margin-bottom:8px}.warning-message{font-size:13px;color:#7f1d1d;margin-bottom:8px}.warning-suggestion{font-size:12px;color:#991b1b;font-style:italic}.audio-playback{margin:10px 0;padding:10px;background:#f8f9fa;border-radius:8px;border:1px solid #dee2e6;animation:slideInUp .3s ease}.audio-playback audio{width:100%;height:35px}.audio-recorder-chat{position:relative;width:100%}.input-container{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:0 0 16px 16px;padding:20px;box-shadow:0 -4px 20px #0000000d;animation:slideInUp .5s ease}.chat-input-container{position:relative}.chat-input-form{display:flex;align-items:center;gap:12px;padding:12px;background:#f8f9fa;border-radius:30px;border:2px solid #e0e0e0;transition:all .3s ease}.chat-input-form:focus-within{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.chat-text-input{flex:1;padding:12px 16px;border:none;background:#fff;font-size:15px;outline:none;color:#333}.chat-text-input::placeholder{color:#999}.chat-text-input:disabled{opacity:.7;cursor:not-allowed;background:#e8e8e8!important;color:#666!important}.mic-button{width:48px;height:48px;border-radius:50%;border:none;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:24px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;flex-shrink:0}.mic-button:hover:not(:disabled){transform:scale(1.1);box-shadow:0 4px 20px #667eea66}.mic-button:disabled{opacity:.5;cursor:not-allowed;transform:none}.mic-button.recording{background:linear-gradient(135deg,#ef4444,#dc2626);animation:recordingPulse 1.5s ease-in-out infinite}.send-button{width:48px;height:48px;border-radius:50%;border:none;background:linear-gradient(135deg,#10b981,#059669);color:#fff;font-size:20px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;flex-shrink:0}.send-button:hover:not(:disabled){transform:scale(1.1);box-shadow:0 4px 20px #10b98166}.send-button:disabled{opacity:.5;cursor:not-allowed;transform:none;background:#d1d5db}.recording-status{display:flex;align-items:center;justify-content:center;gap:12px;padding:16px 24px;background:linear-gradient(135deg,#ef44441a,#dc26261a);border:2px solid #ef4444;border-radius:16px;margin-bottom:12px;animation:pulseGlow 2s ease-in-out infinite}@keyframes pulseGlow{0%,to{box-shadow:0 0 20px #ef44444d}50%{box-shadow:0 0 30px #ef444499}}.recording-status-icon{font-size:24px;animation:recordingBounce 1s ease-in-out infinite}@keyframes recordingBounce{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.recording-status-text{font-size:16px;font-weight:700;color:#dc2626;display:flex;align-items:center;gap:8px}.recording-status-timer{font-size:18px;font-weight:700;color:#ef4444;padding:4px 12px;background:#ef444426;border-radius:8px;min-width:80px;text-align:center;animation:timerPulse 1s ease-in-out infinite}@keyframes timerPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(1.05)}}.processing-indicator{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:12px;color:#667eea;font-size:14px;font-weight:500}.processing-spinner-small{width:16px;height:16px;border:2px solid rgba(102,126,234,.2);border-top:2px solid #667eea;border-radius:50%;animation:spin 1s linear infinite}.recorder-error-toast{position:fixed;top:100px;left:50%;transform:translate(-50%);padding:12px 24px;background:#fee;border:2px solid #ef4444;border-radius:12px;color:#dc2626;font-size:14px;font-weight:600;box-shadow:0 4px 20px #ef444433;z-index:10000;animation:slideDown .3s ease}.record-btn,.stop-btn{border-radius:50%;border:none;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 20px #00000026;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.record-btn-large{width:140px;height:140px;font-size:16px;background:linear-gradient(135deg,#667eea,#764ba2)}.record-btn-large:hover:not(:disabled){transform:scale(1.1);box-shadow:0 8px 40px #667eea66;animation:bounce .6s ease}.record-btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important;animation:none!important}@keyframes bounce{0%,to{transform:scale(1.1)}50%{transform:scale(1.15)}}.record-icon{font-size:48px}.record-text{font-size:14px;font-weight:700}.stop-btn{width:140px;height:140px;font-size:16px;position:relative;background:linear-gradient(135deg,#ef4444,#dc2626)}.stop-btn-recording{animation:recordingPulse 1.5s ease-in-out infinite}@keyframes recordingPulse{0%,to{transform:scale(1);box-shadow:0 4px 20px #ef44444d}50%{transform:scale(1.05);box-shadow:0 8px 40px #ef444499}}.recording-pulse{position:absolute;width:100%;height:100%;border-radius:50%;border:3px solid #ef4444;opacity:0;animation:ripple 2s ease-out infinite}.pulse-2{animation-delay:.5s}.pulse-3{animation-delay:1s}@keyframes ripple{0%{transform:scale(1);opacity:.8}to{transform:scale(1.8);opacity:0}}.stop-icon{font-size:48px;position:relative;z-index:1}.stop-text{font-size:14px;font-weight:700;position:relative;z-index:1}.recording-timer{font-size:20px;font-weight:700;color:#ef4444;padding:8px 16px;background:#ef44441a;border-radius:12px;border:2px solid #ef4444;animation:timerBlink 1s ease-in-out infinite}@keyframes timerBlink{0%,to{opacity:1}50%{opacity:.7}}.waveform-container{width:100%;display:flex;flex-direction:column;align-items:center;gap:15px;margin-top:10px}.audio-level-indicator{width:100%;background:#667eea14;padding:15px;border-radius:12px;display:flex;align-items:center;gap:12px}.level-label{font-size:14px;font-weight:600;color:#667eea;white-space:nowrap}.level-bars{flex:1;display:flex;gap:4px;height:30px;align-items:flex-end}.level-bar{flex:1;background:#e0e0e0;border-radius:3px;transition:all .1s ease}.level-bar.active{background:linear-gradient(to top,#10b981,#34d399);box-shadow:0 0 8px #10b98166}.level-percentage{font-size:16px;font-weight:700;color:#667eea;min-width:45px;text-align:right}.waveform-visualizer{width:100%;height:100px;background:#667eea0d;border-radius:12px;display:flex;align-items:center;justify-content:center;gap:3px;padding:10px}.wave-bar{width:6px;background:linear-gradient(to top,#667eea,#764ba2);border-radius:3px;transition:height .05s ease,opacity .15s ease;min-height:10px}.low-audio-warning{color:#f59e0b;font-size:13px;font-weight:600;padding:8px 12px;background:#f59e0b1a;border-radius:8px;border:1px solid rgba(245,158,11,.3);animation:fadeInOut 1.5s ease-in-out infinite}@keyframes fadeInOut{0%,to{opacity:.7}50%{opacity:1}}.language-hint{color:#667eea;font-size:14px;font-weight:500;text-align:center}.recorder-error{color:#dc2626;background:#ef44441a;padding:12px;border-radius:8px;border:1px solid #ef4444;font-size:14px;font-weight:500;text-align:center;margin-bottom:15px}.loading{color:#667eea;font-size:14px;font-weight:500}.processing{display:flex;align-items:center;gap:12px;color:#667eea;font-size:16px;font-weight:600;padding:20px}.processing-spinner{width:40px;height:40px;border:4px solid rgba(102,126,234,.2);border-top:4px solid #667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.divider{width:100%;text-align:center;border-top:1px solid #e0e0e0;line-height:.1em;margin:20px 0}.divider span{background:#fffffff2;padding:0 10px;color:#999;font-size:12px;font-weight:600}.text-input-form{display:flex;gap:10px;width:100%;animation:slideInUp .5s ease}@keyframes slideInUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.text-input{flex:1;padding:12px 16px;border:2px solid #e0e0e0;border-radius:12px;font-size:14px;outline:none;transition:all .3s ease}.text-input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a;transform:translateY(-2px)}.text-input:disabled{background:#f5f5f5;cursor:not-allowed}.text-submit-btn{padding:12px 24px;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:12px;color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease}.text-submit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 20px #667eea66}.text-submit-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}@media (max-width: 768px){.app{padding:15px}.app-header{padding:15px 20px}.logo h1{font-size:24px}.logo-icon{font-size:28px}.brand{flex-direction:column;align-items:flex-start}.header-actions{width:100%;flex-direction:column;align-items:flex-start;gap:10px}.language-selector{align-items:flex-start}.chat-interface,.recorder-container{padding:20px}.record-btn,.stop-btn{width:100px;height:100px;font-size:16px}.message{max-width:90%}}@media (max-width: 480px){.logo h1{font-size:20px}.logo-icon{font-size:24px}.record-btn,.stop-btn{width:90px;height:90px;font-size:14px}.waveform-bars{height:60px}.waveform-bar{width:6px}}@media (prefers-reduced-motion: reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.about-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#0009;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .3s ease}.about-content{background:#fff;border-radius:16px;max-width:700px;max-height:80vh;overflow-y:auto;padding:40px;box-shadow:0 20px 60px #0000004d;position:relative;animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.close-btn{position:absolute;top:15px;right:15px;width:32px;height:32px;border:none;background:#0000000d;border-radius:50%;font-size:20px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.close-btn:hover{background:#0000001a;transform:rotate(90deg)}.about-content h2{font-size:32px;margin-bottom:25px;color:#333;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.about-section{margin-bottom:25px}.about-section h3{font-size:20px;color:#667eea;margin-bottom:12px}.about-section p{line-height:1.7;color:#555;margin-bottom:10px}.about-section ul,.about-section ol{margin-left:20px;line-height:1.8;color:#555}.about-section li{margin-bottom:8px}.about-section strong{color:#667eea}.coming-soon-text{color:#888;font-style:italic;font-size:14px}.about-footer{margin-top:30px;padding-top:20px;border-top:1px solid #e0e0e0;text-align:center;color:#888}.about-footer .version{font-size:12px;margin-top:5px;color:#aaa}.about-content::-webkit-scrollbar{width:8px}.about-content::-webkit-scrollbar-track{background:#f0f0f0;border-radius:10px}.about-content::-webkit-scrollbar-thumb{background:#667eea4d;border-radius:10px}.about-content::-webkit-scrollbar-thumb:hover{background:#667eea80}@media (max-width: 768px){.about-content{margin:20px;padding:30px 20px;max-height:85vh}.about-content h2{font-size:24px}.about-section h3{font-size:18px}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}#root{width:100%}