:root{--primary: #6366f1;--primary-dark: #4f46e5;--secondary: #8b5cf6;--bg-dark: #0f172a;--bg-medium: #1e293b;--bg-light: #334155;--bg-card: #2a2a2a;--bg-hover: #333333;--text: #f1f5f9;--text-dim: #94a3b8;--text-secondary: #b0b0b0;--border: #475569;--success: #10b981;--success-dark: #388e3c;--warning: #f59e0b;--shadow: rgba(0, 0, 0, .3)}*{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,#0f172a,#1e293b);color:var(--text);line-height:1.6;min-height:100vh;padding:2rem;padding-bottom:100px}.container{max-width:1200px;margin:0 auto}.app-header{text-align:center;margin-bottom:2rem;padding-bottom:1rem}.app-header h1{font-size:3rem;font-weight:800;background:linear-gradient(135deg,#6366f1,#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.app-header .subtitle{color:var(--text-dim);font-size:1.1rem;margin-bottom:1.5rem}.tab-nav{display:flex;gap:.5rem;margin-bottom:2rem;padding-bottom:1rem;border-bottom:2px solid var(--border);flex-wrap:wrap;justify-content:center}.tab-button{padding:.75rem 1.5rem;background:var(--bg-light);border:2px solid var(--border);border-radius:8px 8px 0 0;color:var(--text-dim);font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;font-family:inherit;border-bottom:3px solid transparent;margin-bottom:-1rem}.tab-button:hover{color:var(--text);background:var(--bg-medium);border-color:var(--primary);transform:translateY(-2px)}.tab-button.active{background:var(--bg-medium);color:var(--primary);border-color:var(--primary);border-bottom-color:var(--primary)}.tab-pane{display:none;animation:fadeIn .5s ease}.tab-pane.active{display:block}.tool-header{text-align:center;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:2px solid var(--border)}.tool-header h1{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#6366f1,#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.tool-header .subtitle{color:var(--text-dim);font-size:1.1rem;margin-bottom:1rem}.tool-footer{text-align:center;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border);color:var(--text-dim);font-size:.9rem}h1{font-size:3rem;font-weight:800;background:linear-gradient(135deg,#6366f1,#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}h2{font-size:1.5rem;margin-bottom:1.5rem;color:var(--text);font-weight:600}h3{color:var(--primary);font-size:1.1rem;margin-bottom:1rem}.subtitle{color:var(--text-dim);font-size:1.1rem}.section-hint{color:var(--text-secondary);font-size:.95rem;margin-bottom:1.5rem;margin-top:-.5rem}.content{display:flex;flex-direction:column;gap:2rem}section{background:var(--bg-medium);border:1px solid var(--border);border-radius:12px;padding:2rem}.content-section{animation:fadeIn .5s ease}.info-box{background:var(--bg-card);border-radius:8px;padding:1.5rem;margin-top:1.5rem;text-align:left;max-width:700px;margin-left:auto;margin-right:auto;border:1px solid var(--border)}.info-box h3{color:var(--primary);font-size:1.1rem;margin-bottom:1rem;text-align:center}.steps-list{list-style:none;counter-reset:step-counter;margin:0 0 1rem;padding:0}.steps-list li{counter-increment:step-counter;padding:.5rem 0;color:var(--text);font-size:1rem;line-height:1.6}.help-text{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);color:var(--text-secondary);font-size:.9rem;line-height:1.6;text-align:center}.help-text code{background:#6366f133;padding:.2rem .4rem;border-radius:4px;color:var(--primary);font-family:Courier New,monospace;font-size:.9em}.presets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.preset-btn{background:var(--bg-light);border:2px solid var(--border);border-radius:8px;padding:1rem;cursor:pointer;transition:all .2s ease;text-align:left;color:var(--text);font-family:inherit}.preset-btn:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 12px #6366f14d}.preset-btn.active{background:var(--primary);border-color:var(--primary)}.preset-name{font-weight:600;font-size:1rem;margin-bottom:.25rem}.preset-desc{font-size:.85rem;color:var(--text-dim)}.preset-btn.active .preset-desc{color:#fffc}.controls-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}.control-group{display:flex;flex-direction:column;gap:.5rem}.control-group label{display:flex;justify-content:space-between;align-items:center;font-weight:500;color:var(--text);font-size:.9rem}.value{color:var(--primary);font-weight:600;font-size:.9rem;font-variant-numeric:tabular-nums}input[type=range]{width:100%;height:6px;background:var(--bg-dark);border-radius:3px;outline:none;-webkit-appearance:none;cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;background:var(--primary);border-radius:50%;cursor:pointer;transition:all .2s ease}input[type=range]::-webkit-slider-thumb:hover{background:var(--primary-dark);transform:scale(1.1)}input[type=range]::-moz-range-thumb{width:18px;height:18px;background:var(--primary);border:none;border-radius:50%;cursor:pointer;transition:all .2s ease}input[type=range]::-moz-range-thumb:hover{background:var(--primary-dark);transform:scale(1.1)}.radio-group{display:flex;gap:1rem}.radio-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;padding:.5rem 1rem;background:var(--bg-dark);border:2px solid var(--border);border-radius:6px;transition:all .2s ease}.radio-label:hover{border-color:var(--primary)}.radio-label input[type=radio]{cursor:pointer}.radio-label input[type=radio]:checked+span{color:var(--primary);font-weight:600}.upload-section{margin-bottom:2rem}.drop-zone{border:3px dashed var(--border);border-radius:12px;padding:4rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease;background:var(--bg-card)}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--primary);background:#6366f11a;transform:scale(1.02)}.upload-icon{width:64px;height:64px;margin-bottom:1rem;color:var(--primary)}.drop-text{font-size:1.2rem;margin-bottom:.5rem;color:var(--text)}.drop-hint{color:var(--text-secondary);font-size:.9rem}.file-info{background:var(--bg-card);padding:1.5rem;border-radius:8px;margin-bottom:2rem;border-left:4px solid var(--primary)}.file-info-content{display:flex;flex-direction:column;gap:1rem}.file-stats p{margin-bottom:.5rem}.file-info strong{color:var(--primary)}.filter-controls{padding-top:.5rem;border-top:1px solid var(--border)}.checkbox-label{display:inline-flex;align-items:center;gap:.5rem;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:.95rem}.checkbox-label input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:var(--primary)}.checkbox-label:hover span{color:var(--primary)}.no-tracks-message{text-align:center;padding:2rem;color:var(--text-secondary);font-size:1rem}.tracks-section{margin-bottom:2rem}.tracks-list{display:grid;gap:1rem}.track-card{background:var(--bg-card);padding:1.5rem;border-radius:8px;border:2px solid transparent;transition:all .3s ease;overflow:hidden}.track-card:hover{background:var(--bg-hover);border-color:var(--primary)}.track-card.selected{border-color:var(--success);background:#10b9811a}.track-content{display:flex;flex-direction:column;gap:1rem;min-width:0}.track-header{display:flex;align-items:flex-start}.track-checkbox{display:flex;align-items:flex-start;gap:.75rem;flex:1;cursor:pointer}.track-checkbox-input{width:20px;height:20px;margin-top:2px;cursor:pointer;accent-color:var(--primary);flex-shrink:0}.track-checkbox-label{flex:1;cursor:pointer;-webkit-user-select:none;user-select:none}.track-name{font-size:1.1rem;font-weight:600;margin-bottom:.25rem;transition:color .3s ease}.track-checkbox:hover .track-name{color:var(--primary)}.track-details{color:var(--text-secondary);font-size:.9rem}.track-preview-container{background:#1a1a1a;border-radius:6px;padding:.5rem;overflow-x:auto;overflow-y:hidden;min-height:110px;max-width:100%;width:100%}.track-preview-canvas{display:block;border-radius:4px}.track-player-controls{display:flex;gap:.5rem;padding-top:.5rem;border-top:1px solid var(--border)}.export-section{animation:fadeIn .3s ease;margin-bottom:2rem}.export-header{display:flex;justify-content:flex-end;margin-bottom:1rem}.stream-preview{background:var(--bg-card);border-radius:8px;padding:1.5rem;margin-bottom:1.5rem;border:1px solid var(--border)}.stream-preview-content h3{color:var(--primary);font-size:1.1rem;margin-bottom:1rem}.stream-list{list-style:none;padding:0;margin:0}.stream-list>li{padding:.5rem 0;border-bottom:1px solid var(--border)}.stream-list>li:last-child{border-bottom:none}.stream-list code{background:#6366f133;padding:.2rem .5rem;border-radius:4px;color:var(--primary);font-family:Courier New,monospace;font-size:.9em}.stream-sublist{list-style:none;padding-left:1.5rem;margin-top:.5rem}.stream-sublist li{padding:.25rem 0;color:var(--text-secondary)}.export-options{background:var(--bg-card);padding:1rem 1.5rem;border-radius:8px;margin-bottom:1rem;border:1px solid var(--border)}.option-group{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}.option-label{font-weight:600;color:var(--text);min-width:120px}.text-input{flex:1;min-width:200px;padding:.5rem .75rem;background:var(--bg-dark);border:2px solid var(--border);border-radius:6px;color:var(--text);font-size:.95rem;font-family:Courier New,monospace;transition:all .3s ease}.text-input:focus{outline:none;border-color:var(--primary);background:#6366f10d}.text-input::placeholder{color:var(--text-secondary)}.export-controls{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.code-tabs{display:flex;gap:.5rem;margin-bottom:1rem;border-bottom:2px solid var(--border)}.code-tab{padding:.75rem 1.5rem;background:transparent;border:none;border-bottom:3px solid transparent;color:var(--text-secondary);font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s ease;font-family:inherit;margin-bottom:-2px}.code-tab:hover{color:var(--text);background:#ffffff0d}.code-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.code-preview-container{position:relative}.code-preview{background:var(--bg-card);border-radius:8px;padding:1.5rem;border:1px solid var(--border);max-height:400px;overflow:auto;display:none}.code-preview.active{display:block}.code-preview pre{font-family:Courier New,monospace;font-size:.9rem;line-height:1.5;color:#a9b7c6;margin:0;white-space:pre;overflow-x:auto}pre{background:var(--bg-dark);border:1px solid var(--border);border-radius:8px;padding:1.5rem;overflow-x:auto;font-family:Monaco,Courier New,monospace;font-size:.85rem;line-height:1.6;color:#e2e8f0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 2rem;font-size:1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:all .2s ease;font-family:inherit;text-decoration:none}.btn-icon{width:20px;height:20px;flex-shrink:0}.btn-primary{background:var(--primary);color:#fff;font-size:1.1rem;padding:1rem 2.5rem}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 20px #6366f166}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:var(--success-dark);transform:translateY(-2px);box-shadow:0 4px 12px #10b98166}.btn-secondary{background:var(--bg-light);color:var(--text);border:2px solid var(--border)}.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}.btn-outline{background:transparent;color:var(--text);border:2px solid var(--border)}.btn-outline:hover{background:var(--bg-card);border-color:var(--text)}.btn-small{padding:.5rem 1rem;font-size:.9rem}.reset-btn{display:block;margin:2rem auto}.actions-section{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center;padding:1.5rem}.app-footer{position:fixed;bottom:0;left:0;right:0;background:var(--bg-medium);border-top:2px solid var(--border);padding:1rem 0;z-index:1000}.footer-links{display:flex;justify-content:center;align-items:center;gap:.5rem}.footer-links a{color:var(--text);text-decoration:none;font-weight:600;font-size:.95rem;transition:all .3s ease;padding:.25rem .5rem;border-radius:4px}.footer-links a:hover{color:var(--primary);background:#6366f11a}.footer-links .separator{color:var(--text-dim);-webkit-user-select:none;user-select:none}.footer{position:fixed;bottom:0;left:0;right:0;background:var(--bg-card);border-top:2px solid var(--border);padding:1rem 0;z-index:1000}.footer-content{display:flex;justify-content:center;align-items:center;gap:1rem;flex-wrap:wrap;max-width:1200px;margin:0 auto;padding:0 2rem}.link-button{display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1.25rem;background:var(--bg-dark);border:2px solid var(--border);border-radius:6px;color:var(--text);text-decoration:none;font-weight:600;font-size:.9rem;transition:all .3s ease}.link-button:hover{background:var(--bg-hover);border-color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 12px #6366f14d;color:var(--primary)}.link-icon{width:18px;height:18px;flex-shrink:0}footer{text-align:center;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border);color:var(--text-dim);font-size:.9rem}.hidden{display:none!important}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}button:focus,input:focus{outline:2px solid var(--primary);outline-offset:2px}button:active{transform:scale(.98)}@media (max-width: 768px){body{padding:1rem;padding-bottom:120px}.container{padding:1rem}h1,.app-header h1,.tool-header h1{font-size:2rem}.subtitle{font-size:1rem}.tab-nav{flex-direction:column}.tab-button{width:100%}.presets-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.controls-grid{grid-template-columns:1fr}section{padding:1.5rem}.actions-section{flex-direction:column}.btn{width:100%}.info-box{padding:1rem}.steps-list li{font-size:.95rem}.drop-zone{padding:3rem 1rem}.track-header{flex-direction:column;gap:1rem;align-items:flex-start}.track-player-controls{flex-wrap:wrap}.export-controls,.footer-content{flex-direction:column}}