:root{--primary-color: #0d6efd;--secondary-color: #6c757d;--success-color: #198754;--warning-color: #ffc107;--danger-color: #dc3545;--dark-bg: #1a1a2e;--card-bg: #16213e;--region-color: rgba(76, 175, 80, .3);--region-border: #4caf50;--selected-region: rgba(33, 150, 243, .4);--selected-border: #2196f3}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(135deg,#2a4f7a,#3d6e9e);min-height:100vh;color:#e0e0e0}.app-container{max-width:1400px;margin:0 auto;padding:20px}.app-header{text-align:center;margin-bottom:30px}.app-header h1{color:#fff;font-weight:300;font-size:2.5rem;margin-bottom:10px}.app-header p{color:#a0a0a0;font-size:1.1rem}.upload-zone{border:3px dashed #4a7faa;border-radius:16px;padding:60px 40px;text-align:center;background:#16213eb3;transition:all .3s ease;cursor:pointer}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--primary-color);background:#16213ed9}.upload-zone.uploading{border-color:var(--warning-color);background:#ffc1071a}.upload-zone .text-muted{color:#e0e0e0!important}.upload-icon{font-size:4rem;color:#6c757d;margin-bottom:20px}.waveform-container{background:var(--card-bg);border-radius:12px;padding:20px;margin:20px 0;box-shadow:0 4px 20px #0000004d}.waveform-wrapper{position:relative;background:#0000004d;border-radius:8px;overflow:hidden}.playback-controls{display:flex;align-items:center;justify-content:center;gap:15px;margin:20px 0;flex-wrap:wrap}.playback-controls .btn{min-width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem}.playback-controls .btn-play{width:70px;height:70px;font-size:1.5rem}.time-display{font-family:Consolas,Monaco,monospace;font-size:1.1rem;color:#fff;background:#0000004d;padding:10px 20px;border-radius:8px;min-width:180px;text-align:center}.region-list{background:var(--card-bg);border-radius:12px;padding:20px;margin:20px 0}.region-list .text-muted{color:#e0e0e0!important}.region-list h3{color:#fff;margin-bottom:15px;font-weight:500}.region-item{display:flex;align-items:center;justify-content:space-between;padding:12px 15px;background:#ffffff0d;border-radius:8px;margin-bottom:8px;transition:all .2s ease;cursor:pointer}.region-item:hover{background:#ffffff1a}.region-item.selected{background:#2196f333;border:1px solid var(--selected-border)}.region-time{font-family:Consolas,Monaco,monospace;color:#a0a0a0}.region-duration{color:var(--success-color);font-weight:500}.region-checkbox{width:20px;height:20px;cursor:pointer}.settings-panel{background:var(--card-bg);border-radius:12px;padding:20px;margin:20px 0}.settings-panel h3{color:#fff;margin-bottom:15px;font-weight:500}.slider-group{padding-bottom:4px;border-bottom:1px solid rgba(255,255,255,.06)}.slider-group:last-of-type{border-bottom:none}.slider-label{color:#e0e0e0;font-weight:500;font-size:.95rem}.slider-value{color:#7eb8ff;font-weight:600;font-size:1.05rem;font-variant-numeric:tabular-nums;min-width:60px;text-align:right}.slider-description{color:#888;font-size:.8rem;line-height:1.4;margin-bottom:8px}.slider-group .form-range{width:100%}.slider-scale{display:flex;justify-content:space-between;color:#666;font-size:.72rem;margin-top:2px;padding:0 2px}.export-panel{background:linear-gradient(135deg,#1e3a5f,#16213e);border-radius:12px;padding:20px;margin:20px 0;border:1px solid rgba(255,255,255,.1)}.export-summary{display:flex;gap:30px;margin-bottom:15px;flex-wrap:wrap}.export-stat{text-align:center}.export-stat .value{font-size:1.5rem;font-weight:700;color:#fff}.export-stat .label{color:#a0a0a0;font-size:.9rem}.progress-container{margin:20px 0}.progress{height:10px;border-radius:5px;background:#0000004d}.progress-bar{background:linear-gradient(90deg,var(--primary-color),var(--success-color));transition:width .3s ease}.file-info{display:flex;gap:20px;flex-wrap:wrap;margin:15px 0;padding:15px;background:#0003;border-radius:8px}.info-item{display:flex;flex-direction:column}.info-item .label{font-size:.8rem;color:#6c757d;text-transform:uppercase}.info-item .value{color:#fff;font-weight:500}.loading-spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px}.spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.1);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.btn-outline-secondary{color:#e0e0e0;border-color:#e0e0e0}.btn-outline-secondary:hover{color:#333;background-color:#e0e0e0;border-color:#e0e0e0}@media (max-width: 768px){.app-container{padding:10px}.playback-controls{gap:10px}.time-display{min-width:150px;font-size:.9rem}.export-summary{gap:15px}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#0003;border-radius:4px}::-webkit-scrollbar-thumb{background:#4a5568;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#5a6578}.tooltip-custom{position:absolute;background:#000000e6;color:#fff;padding:5px 10px;border-radius:4px;font-size:.8rem;pointer-events:none;z-index:1000}.timeline-container{position:relative;height:30px;margin-top:5px}.timeline-marker{position:absolute;bottom:0;font-size:.75rem;color:#6c757d;transform:translate(-50%)}