:root{--ats-primary:#2563eb;--ats-primary-dark:#1d4ed8;--ats-primary-light:#dbeafe;--ats-secondary:#7c3aed;--ats-accent:#0ea5e9;--ats-success:#16a34a;--ats-warning:#d97706;--ats-danger:#dc2626;--ats-bg:#f8fafc;--ats-surface:#ffffff;--ats-surface-2:#f1f5f9;--ats-border:#e2e8f0;--ats-border-focus:#2563eb;--ats-text:#1e293b;--ats-text-muted:#64748b;--ats-text-light:#94a3b8;--ats-shadow:0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);--ats-shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);--ats-radius:12px;--ats-radius-sm:8px;--ats-radius-lg:16px;--ats-font:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;--ats-wave-color:#3b82f6;--ats-wave-progress:#1d4ed8;--ats-wave-bg:#eff6ff;--ats-wave-cursor:#2563eb}.ats-wrapper *{box-sizing:border-box;margin:0;padding:0}.ats-wrapper{font-family:var(--ats-font);color:var(--ats-text);background:var(--ats-bg);padding:20px 0;width:100%}.ats-app{max-width:1100px;margin:0 auto;background:var(--ats-surface);border-radius:var(--ats-radius-lg);box-shadow:var(--ats-shadow-lg);overflow:hidden;border:1px solid var(--ats-border)}.ats-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--ats-text-muted);gap:16px}.ats-loading-spinner{width:40px;height:40px;border:3px solid var(--ats-border);border-top-color:var(--ats-primary);border-radius:50%;animation:ats-spin 0.8s linear infinite}@keyframes ats-spin{to{transform:rotate(360deg)}}.ats-tools-nav{display:flex;flex-wrap:wrap;gap:4px;padding:12px 16px;background:var(--ats-surface-2);border-bottom:2px solid var(--ats-border);align-items:center}.ats-tool-btn{display:flex;align-items:center;gap:6px;padding:8px 14px;border:1.5px solid var(--ats-border);border-radius:50px;background:var(--ats-surface);color:var(--ats-text-muted);font-size:13px;font-weight:500;cursor:pointer;transition:all 0.2s ease;white-space:nowrap;font-family:var(--ats-font);line-height:1}.ats-tool-btn:hover{border-color:var(--ats-primary);color:var(--ats-primary);background:var(--ats-primary-light);transform:translateY(-1px);box-shadow:0 2px 8px rgba(37,99,235,.15)}.ats-tool-btn.active{border-color:var(--ats-primary);color:#fff;background:var(--ats-primary);box-shadow:0 2px 8px rgba(37,99,235,.35)}.ats-tool-btn svg{flex-shrink:0}.ats-upload-section{padding:40px 24px;display:flex;flex-direction:column;align-items:center;gap:20px}.ats-upload-zone{width:100%;max-width:600px;border:2.5px dashed var(--ats-border);border-radius:var(--ats-radius-lg);padding:48px 32px;text-align:center;cursor:pointer;transition:all 0.25s ease;background:var(--ats-surface-2);position:relative}.ats-upload-zone:hover,.ats-upload-zone.dragging{border-color:var(--ats-primary);background:var(--ats-primary-light);transform:scale(1.01)}.ats-upload-zone input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.ats-upload-icon{width:72px;height:72px;background:linear-gradient(135deg,var(--ats-primary),var(--ats-secondary));border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;color:#fff}.ats-upload-title{font-size:22px;font-weight:700;color:var(--ats-text);margin-bottom:8px}.ats-upload-subtitle{font-size:14px;color:var(--ats-text-muted);margin-bottom:16px}.ats-upload-btn-label{display:inline-flex;align-items:center;gap:8px;background:var(--ats-primary);color:#fff;padding:12px 28px;border-radius:50px;font-size:15px;font-weight:600;cursor:pointer;transition:all 0.2s;border:none;font-family:var(--ats-font)}.ats-upload-btn-label:hover{background:var(--ats-primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.4)}.ats-supported-formats{font-size:12px;color:var(--ats-text-light);margin-top:12px}.ats-editor{display:none;flex-direction:column}.ats-editor.visible{display:flex}.ats-file-bar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--ats-surface-2);border-bottom:1px solid var(--ats-border);gap:12px;flex-wrap:wrap}.ats-file-info{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ats-text);font-weight:500}.ats-file-icon{width:36px;height:36px;background:var(--ats-primary-light);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--ats-primary);flex-shrink:0}.ats-file-name{font-weight:600;color:var(--ats-text);max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ats-file-meta{font-size:12px;color:var(--ats-text-muted)}.ats-reset-btn{display:flex;align-items:center;gap:6px;padding:7px 16px;border:1.5px solid var(--ats-border);border-radius:50px;background:var(--ats-surface);color:var(--ats-text-muted);font-size:13px;font-weight:500;cursor:pointer;transition:all 0.2s;font-family:var(--ats-font)}.ats-reset-btn:hover{border-color:var(--ats-danger);color:var(--ats-danger);background:#fef2f2}.ats-waveform-section{padding:16px 20px;background:var(--ats-wave-bg);border-bottom:1px solid var(--ats-border);position:relative}.ats-waveform-container{position:relative;border-radius:var(--ats-radius-sm);overflow:hidden;background:#e0eeff;height:120px;cursor:pointer;user-select:none}.ats-waveform-canvas{width:100%;height:100%;display:block}.ats-waveform-playhead{position:absolute;top:0;bottom:0;width:2px;background:var(--ats-primary-dark);pointer-events:none;z-index:3;transition:left 0.05s linear}.ats-waveform-playhead::before{content:'';position:absolute;top:0;left:-4px;width:10px;height:10px;background:var(--ats-primary-dark);border-radius:50%}.ats-trim-region{position:absolute;top:0;bottom:0;background:rgba(37,99,235,.12);border-top:2px solid var(--ats-primary);border-bottom:2px solid var(--ats-primary);pointer-events:none;z-index:2}.ats-trim-handle{position:absolute;top:0;bottom:0;width:14px;background:var(--ats-primary);cursor:ew-resize;z-index:4;pointer-events:all;display:flex;align-items:center;justify-content:center}.ats-trim-handle::after{content:'⋮';color:#fff;font-size:16px;line-height:1}.ats-trim-handle-left{left:0;border-radius:4px 0 0 4px}.ats-trim-handle-right{right:0;border-radius:0 4px 4px 0}.ats-waveform-timestamps{display:flex;justify-content:space-between;padding:6px 4px 0;font-size:11px;color:var(--ats-text-muted);font-weight:500}.ats-playback-bar{display:flex;align-items:center;gap:10px;padding:12px 20px;background:var(--ats-surface);border-bottom:1px solid var(--ats-border);flex-wrap:wrap}.ats-play-btn{width:44px;height:44px;border-radius:50%;background:var(--ats-primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all 0.2s;flex-shrink:0;font-family:var(--ats-font)}.ats-play-btn:hover{background:var(--ats-primary-dark);transform:scale(1.08);box-shadow:0 4px 12px rgba(37,99,235,.4)}.ats-time-display{font-size:13px;color:var(--ats-text-muted);font-weight:500;font-variant-numeric:tabular-nums;min-width:110px}.ats-progress-bar-container{flex:1;height:6px;background:var(--ats-border);border-radius:99px;cursor:pointer;position:relative;min-width:80px}.ats-progress-bar-fill{height:100%;background:var(--ats-primary);border-radius:99px;transition:width 0.1s linear;pointer-events:none}.ats-tool-panel{display:none;padding:20px;flex-direction:column;gap:16px;background:var(--ats-surface)}.ats-tool-panel.active{display:flex}.ats-panel-title{font-size:16px;font-weight:700;color:var(--ats-text);display:flex;align-items:center;gap:8px;padding-bottom:12px;border-bottom:2px solid var(--ats-border)}.ats-trim-inputs{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.ats-time-input-group{display:flex;flex-direction:column;gap:4px}.ats-time-input-group label{font-size:12px;font-weight:600;color:var(--ats-text-muted);text-transform:uppercase;letter-spacing:.05em}.ats-time-input{padding:8px 12px;border:1.5px solid var(--ats-border);border-radius:var(--ats-radius-sm);font-size:14px;color:var(--ats-text);font-weight:600;background:var(--ats-surface);font-family:var(--ats-font);width:120px;font-variant-numeric:tabular-nums;transition:border-color 0.2s}.ats-time-input:focus{outline:none;border-color:var(--ats-primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}.ats-trim-separator{font-size:18px;color:var(--ats-text-muted);font-weight:300;padding-top:20px}.ats-trim-info{font-size:13px;color:var(--ats-text-muted);display:flex;align-items:center;gap:6px;padding-top:20px}.ats-slider-group{display:flex;flex-direction:column;gap:8px}.ats-slider-header{display:flex;align-items:center;justify-content:space-between}.ats-slider-label{font-size:14px;font-weight:600;color:var(--ats-text)}.ats-slider-value{font-size:14px;font-weight:700;color:var(--ats-primary);min-width:60px;text-align:right;font-variant-numeric:tabular-nums}.ats-slider{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:99px;background:var(--ats-border);outline:none;cursor:pointer;transition:background 0.2s}.ats-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:var(--ats-primary);cursor:pointer;box-shadow:0 2px 6px rgba(37,99,235,.4);transition:transform 0.1s,box-shadow 0.1s}.ats-slider::-webkit-slider-thumb:hover{transform:scale(1.2);box-shadow:0 3px 10px rgba(37,99,235,.5)}.ats-slider::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--ats-primary);cursor:pointer;border:none;box-shadow:0 2px 6px rgba(37,99,235,.4)}.ats-eq-grid{display:flex;gap:8px;justify-content:space-between;align-items:flex-end;flex-wrap:wrap}.ats-eq-band{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1;min-width:40px}.ats-eq-slider-container{height:120px;display:flex;align-items:center;justify-content:center;position:relative}.ats-eq-slider{-webkit-appearance:none;appearance:none;width:120px;height:6px;border-radius:99px;background:var(--ats-border);outline:none;cursor:pointer;transform:rotate(-90deg);transform-origin:center}.ats-eq-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--ats-primary);cursor:pointer;box-shadow:0 2px 6px rgba(37,99,235,.4)}.ats-eq-slider::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--ats-primary);cursor:pointer;border:none}.ats-eq-freq{font-size:10px;color:var(--ats-text-muted);font-weight:600;text-align:center}.ats-eq-val{font-size:11px;color:var(--ats-primary);font-weight:700;font-variant-numeric:tabular-nums}.ats-eq-presets{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.ats-eq-preset-btn{padding:6px 14px;border:1.5px solid var(--ats-border);border-radius:50px;background:var(--ats-surface);color:var(--ats-text-muted);font-size:12px;font-weight:500;cursor:pointer;transition:all 0.2s;font-family:var(--ats-font)}.ats-eq-preset-btn:hover,.ats-eq-preset-btn.active{border-color:var(--ats-primary);color:var(--ats-primary);background:var(--ats-primary-light)}.ats-fade-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.ats-fade-section{display:flex;flex-direction:column;gap:12px;padding:16px;border:1.5px solid 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rgba(220,38,38,0)}}.ats-recorder-btn.paused{background:var(--ats-warning);color:#fff}.ats-recorder-timer{font-size:36px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--ats-text);letter-spacing:.05em}.ats-recorder-status{font-size:14px;color:var(--ats-text-muted);font-weight:500}.ats-recorder-controls{display:flex;gap:12px;align-items:center}.ats-visualizer-canvas{width:100%;height:80px;border-radius:var(--ats-radius-sm);background:var(--ats-wave-bg);border:1px solid var(--ats-border)}.ats-joiner-list{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;max-height:320px;overflow-y:auto}.ats-joiner-item{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--ats-surface-2);border-radius:var(--ats-radius-sm);border:1.5px solid var(--ats-border);transition:all 0.2s}.ats-joiner-item:hover{border-color:var(--ats-primary);background:var(--ats-primary-light)}.ats-joiner-item-drag{cursor:grab;color:var(--ats-text-light);flex-shrink:0}.ats-joiner-item-name{flex:1;font-size:13px;font-weight:500;color:var(--ats-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ats-joiner-item-duration{font-size:12px;color:var(--ats-text-muted);font-variant-numeric:tabular-nums;flex-shrink:0}.ats-joiner-item-remove{width:28px;height:28px;border:none;background:transparent;cursor:pointer;color:var(--ats-text-light);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all 0.2s;font-family:var(--ats-font)}.ats-joiner-item-remove:hover{background:#fef2f2;color:var(--ats-danger)}.ats-joiner-add-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border:2px dashed var(--ats-primary);border-radius:var(--ats-radius-sm);background:var(--ats-primary-light);color:var(--ats-primary);font-size:14px;font-weight:600;cursor:pointer;transition:all 0.2s;font-family:var(--ats-font);position:relative;overflow:hidden}.ats-joiner-add-btn input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer}.ats-joiner-add-btn:hover{background:var(--ats-primary);color:#fff}.ats-gap-control{display:flex;align-items:center;gap:12px}.ats-export-bar{display:flex;align-items:center;justify-content:flex-end;gap:12px;padding:16px 20px;background:var(--ats-surface-2);border-top:2px solid var(--ats-border);flex-wrap:wrap}.ats-format-select{padding:10px 36px 10px 14px;border:1.5px solid var(--ats-border);border-radius:var(--ats-radius-sm);background:var(--ats-surface);color:var(--ats-text);font-size:14px;font-weight:600;cursor:pointer;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' 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rgba(37,99,235,.35)}.ats-btn-outline{background:transparent;color:var(--ats-primary);border:1.5px solid var(--ats-primary)}.ats-btn-outline:hover{background:var(--ats-primary-light)}.ats-btn-ghost{background:transparent;color:var(--ats-text-muted);border:1.5px solid var(--ats-border)}.ats-btn-ghost:hover{border-color:var(--ats-primary);color:var(--ats-primary)}.ats-btn-danger{background:#fef2f2;color:var(--ats-danger);border:1.5px solid #fecaca}.ats-btn-danger:hover{background:var(--ats-danger);color:#fff}.ats-alert{padding:12px 16px;border-radius:var(--ats-radius-sm);font-size:13px;font-weight:500;display:flex;align-items:center;gap:8px}.ats-alert-info{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe}.ats-alert-success{background:#f0fdf4;color:#15803d;border:1px solid #bbf7d0}.ats-alert-warning{background:#fffbeb;color:#b45309;border:1px solid #fde68a}.ats-pitch-display{text-align:center;padding:20px;background:var(--ats-surface-2);border-radius:var(--ats-radius);border:1.5px solid var(--ats-border)}.ats-pitch-value{font-size:48px;font-weight:800;color:var(--ats-primary);font-variant-numeric:tabular-nums;line-height:1}.ats-pitch-unit{font-size:16px;color:var(--ats-text-muted);font-weight:500;margin-top:4px}@media (max-width:768px){.ats-tools-nav{gap:4px;padding:10px 12px}.ats-tool-btn{padding:7px 10px;font-size:12px}.ats-tool-btn .ats-tool-btn-text{display:none}.ats-upload-zone{padding:32px 20px}.ats-upload-title{font-size:18px}.ats-eq-grid{gap:4px}.ats-fade-grid{grid-template-columns:1fr}.ats-trim-inputs{flex-direction:column;align-items:flex-start}.ats-trim-separator{display:none}.ats-export-bar{justify-content:stretch}.ats-format-select,.ats-download-btn{flex:1;justify-content:center}.ats-recorder-timer{font-size:28px}.ats-pitch-value{font-size:36px}.ats-waveform-container{height:90px}}@media (max-width:480px){.ats-wrapper{padding:12px 0}.ats-app{border-radius:8px}.ats-tool-panel{padding:14px}.ats-playback-bar{padding:10px 14px}.ats-file-bar{padding:10px 14px}}.ats-joiner-list::-webkit-scrollbar{width:6px}.ats-joiner-list::-webkit-scrollbar-track{background:var(--ats-surface-2)}.ats-joiner-list::-webkit-scrollbar-thumb{background:var(--ats-border);border-radius:99px}.ats-divider{height:1px;background:var(--ats-border);margin:4px 0}.ats-gap-input{width:70px;padding:8px 10px;border:1.5px solid var(--ats-border);border-radius:var(--ats-radius-sm);font-size:14px;color:var(--ats-text);font-weight:600;font-family:var(--ats-font);text-align:center;transition:border-color 0.2s}.ats-gap-input:focus{outline:none;border-color:var(--ats-primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}.ats-tooltip{position:relative}.ats-tooltip::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 6px);left:50%;transform:translateX(-50%);background:var(--ats-text);color:#fff;font-size:11px;padding:4px 8px;border-radius:4px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity 0.2s;z-index:100}.ats-tooltip:hover::after{opacity:1}