:root{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-surface: #0f3460;--text-primary: #e8e8e8;--text-secondary: #a0a0b0;--text-muted: #666680;--accent-singing: #4fc3f7;--accent-teaching: #81c784;--accent-talking: #ff9800;--accent-silence: #444466;--border-color: #2a2a4a;--btn-bg: #252545;--btn-hover: #353565;--btn-active: #4fc3f7;--radius: 12px;--radius-sm: 8px}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.4;-webkit-font-smoothing:antialiased;-webkit-user-select:none;user-select:none}.app{display:flex;flex-direction:column;height:100vh;height:100dvh;max-width:600px;margin:0 auto}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;padding-top:calc(12px + env(safe-area-inset-top,0px));border-bottom:1px solid var(--border-color);flex-shrink:0}.header h1{font-size:18px;font-weight:400;letter-spacing:-.3px;cursor:pointer}.header h1 span{color:#4a90e2;font-weight:700}.btn-open{display:flex;align-items:center;gap:6px;padding:8px 16px;background:var(--btn-bg);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:14px;font-weight:500;cursor:pointer;transition:background .15s}.btn-open:hover{background:var(--btn-hover)}.btn-open svg{width:16px;height:16px}.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;text-align:center}.welcome-icon{font-size:64px;margin-bottom:24px;opacity:.8}.welcome h2{font-size:22px;font-weight:600;margin-bottom:8px}.welcome p{color:var(--text-secondary);font-size:15px;max-width:280px;margin-bottom:24px}.btn-open-large{display:flex;align-items:center;gap:8px;padding:14px 28px;background:var(--accent-singing);border:none;border-radius:var(--radius);color:var(--bg-primary);font-size:16px;font-weight:600;cursor:pointer;transition:opacity .15s}.btn-open-large:hover{opacity:.9}.btn-open-large:active{opacity:.8}.test-recordings{margin-top:32px;width:100%;max-width:340px}.test-recordings-label{font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.test-recordings-list{display:flex;flex-direction:column;gap:6px}.test-recording-btn{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--btn-bg);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px;cursor:pointer;text-align:left;transition:background .15s}.test-recording-btn:hover{background:var(--btn-hover)}.test-recording-btn:active{background:var(--bg-surface)}.test-recording-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.test-recording-size{color:var(--text-muted);font-size:12px;margin-left:8px;flex-shrink:0}.test-recording-badge{display:inline-block;font-size:10px;font-weight:600;color:#4caf50;background:#4caf5026;padding:1px 6px;border-radius:4px;margin-right:6px;vertical-align:middle}.player-section{display:none;flex-direction:column;flex:1;min-height:0}.player-section.active{display:flex}.timeline-container{padding:8px 16px;flex-shrink:0}.timeline-canvas{width:100%;display:block;border-radius:var(--radius-sm);cursor:pointer}.timeline-times{display:flex;justify-content:space-between;padding:4px 0;font-size:11px;color:var(--text-muted);font-variant-numeric:tabular-nums}.current-segment{padding:8px 16px;text-align:center;flex-shrink:0}.current-segment-type{font-size:14px;font-weight:600;color:var(--text-secondary)}.current-segment-type.singing,.current-segment-type.duetting{color:var(--accent-singing)}.current-segment-type.teaching{color:var(--accent-teaching)}.current-segment-type.talking{color:var(--accent-talking)}.current-segment-time{font-size:12px;color:var(--text-muted);margin-top:2px;font-variant-numeric:tabular-nums}.transport{display:flex;align-items:center;justify-content:center;gap:16px;padding:12px 16px;flex-shrink:0}.transport-btn{display:flex;align-items:center;justify-content:center;border:none;border-radius:50%;cursor:pointer;transition:background .15s,transform .1s;color:var(--text-primary)}.transport-btn:active{transform:scale(.93)}.transport-btn.play-btn{width:64px;height:64px;background:var(--accent-singing);color:var(--bg-primary)}.transport-btn.play-btn:hover{opacity:.9}.transport-btn.skip-btn{width:52px;height:52px;background:var(--btn-bg);border:1px solid var(--border-color)}.transport-btn.skip-btn:hover{background:var(--btn-hover)}.transport-btn.skip-btn:disabled{opacity:.3;cursor:default}.transport-btn.speed-btn{width:44px;height:44px;background:var(--btn-bg);border:1px solid var(--border-color);font-size:14px;font-weight:700;font-variant-numeric:tabular-nums}.transport-btn.speed-btn:hover{background:var(--btn-hover)}.transport-btn.speed-btn.active{background:#4fc3f726;border-color:var(--accent-singing);color:var(--accent-singing)}.transport-btn svg{width:24px;height:24px}.transport-btn.play-btn svg{width:28px;height:28px}.skip-label{font-size:9px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);text-align:center;margin-top:4px}.transport-group{display:flex;flex-direction:column;align-items:center}.segment-list{flex:1;overflow-y:auto;border-top:1px solid var(--border-color);-webkit-overflow-scrolling:touch}.segment-list-header{padding:10px 16px 6px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);position:sticky;top:0;background:var(--bg-primary);z-index:1}.segment-list-inner{padding-bottom:24px}.segment-item{display:flex;align-items:center;gap:12px;width:100%;padding:10px 16px;background:transparent;border:none;border-bottom:1px solid var(--border-color);color:var(--text-primary);font-family:inherit;font-size:14px;text-align:left;cursor:pointer;transition:background .15s}.segment-item:hover{background:#ffffff08}.segment-item.active{background:#4fc3f714}.segment-item.segment-talking{opacity:.6}.segment-item.segment-silence{opacity:.4}.segment-item.active.segment-talking,.segment-item.active.segment-silence{opacity:.8}.segment-icon{font-size:18px;flex-shrink:0;width:28px;text-align:center}.segment-info{flex:1;display:flex;flex-direction:column;min-width:0}.segment-label{font-weight:600;font-size:14px}.segment-singing .segment-label,.segment-duetting .segment-label{color:var(--accent-singing)}.segment-teaching .segment-label{color:var(--accent-teaching)}.segment-talking .segment-label{color:var(--accent-talking)}.segment-time{font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums}.segment-duration{font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums;flex-shrink:0}.segment-empty{padding:32px;text-align:center;color:var(--text-muted);font-size:14px}.processing{display:none;flex-direction:column;align-items:center;justify-content:center;flex:1;padding:32px}.processing.active{display:flex}.processing-spinner{width:48px;height:48px;border:3px solid var(--border-color);border-top-color:var(--accent-singing);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:24px}@keyframes spin{to{transform:rotate(360deg)}}.processing-title{font-size:16px;font-weight:600;margin-bottom:8px}.processing-message{font-size:14px;color:var(--text-secondary);margin-bottom:16px}.progress-bar{width:100%;max-width:280px;height:6px;background:var(--border-color);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--accent-singing);border-radius:3px;transition:width .3s ease;width:0%}.processing-filename{font-size:12px;color:var(--text-muted);margin-top:12px;max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.error-message{display:none;padding:12px 16px;margin:8px 16px;background:#f443361a;border:1px solid rgba(244,67,54,.3);border-radius:var(--radius-sm);color:#ef5350;font-size:14px}.error-message.active{display:block}.summary-bar{display:flex;gap:12px;padding:8px 16px;justify-content:center;flex-shrink:0}.summary-stat{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--text-secondary)}.summary-dot{width:8px;height:8px;border-radius:50%}.summary-dot.singing{background:var(--accent-singing)}.summary-dot.teaching{background:var(--accent-teaching)}.summary-dot.talking{background:var(--accent-talking)}.summary-dot.silence{background:var(--accent-silence)}#file-input{display:none}.segment-list::-webkit-scrollbar{width:4px}.segment-list::-webkit-scrollbar-track{background:transparent}.segment-list::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:2px}.cached-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;background:#4fc3f71a;border-radius:4px;font-size:11px;color:var(--accent-singing);margin-left:8px}.header-actions{display:flex;align-items:center;gap:8px}.btn-edit{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--btn-bg);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);cursor:pointer;transition:background .15s}.btn-edit:hover{background:var(--btn-hover)}.btn-edit.active{background:var(--accent-singing);color:var(--bg-primary);border-color:var(--accent-singing)}.waveform-canvas{width:100%;display:block;border-radius:var(--radius-sm);cursor:pointer;margin-bottom:4px}.annotation-toolbar{display:flex;gap:8px;padding:6px 16px;justify-content:center;flex-shrink:0;background:#4fc3f70a;border-bottom:1px solid var(--border-color)}.annotation-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;background:var(--btn-bg);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px;font-weight:500;font-family:inherit;cursor:pointer;transition:background .15s;min-height:36px}.annotation-btn:hover{background:var(--btn-hover)}.annotation-btn-save{background:var(--accent-singing);color:var(--bg-primary);border-color:var(--accent-singing)}.annotation-btn-save:hover{opacity:.9}.segment-item.edit-mode{opacity:1!important}.segment-edit-controls{display:flex;gap:4px;flex-shrink:0;margin-left:4px}.segment-edit-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;min-width:36px;min-height:36px;background:var(--btn-bg);border:1px solid var(--border-color);border-radius:6px;color:var(--text-secondary);cursor:pointer;transition:background .15s,color .15s;padding:0}.segment-edit-btn:hover{background:var(--btn-hover);color:var(--text-primary)}.segment-edit-btn:active{transform:scale(.93)}.segment-icon-editable{cursor:pointer;background:var(--btn-bg);border:1px solid var(--border-color);border-radius:6px;width:36px;height:36px;min-width:36px;min-height:36px;display:flex;align-items:center;justify-content:center;transition:background .15s;padding:0;color:var(--text-primary)}.segment-icon-editable:hover{background:var(--btn-hover)}.segment-item.edit-mode .segment-icon{font-size:inherit;width:36px;text-align:center}.app.edit-mode .segment-list{background:#4fc3f705}.app.edit-mode .segment-list-header{background:#4fc3f70a}.annotations-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;background:#ff98001a;border-radius:4px;font-size:11px;color:var(--accent-talking);margin-left:8px}