:root{--primary:#4f46e5;--primary-hover:#4338ca;--teal:#0d9488;--teal-hover:#0f766e;--bg-subtle:#f8fafc;--border-color:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:18px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-main);-webkit-font-smoothing:antialiased;background-color:#f1f5f9;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}.site-header{border-bottom:1px solid var(--border-color);background:#fff;margin-bottom:24px}.masthead{justify-content:space-between;align-items:center;gap:16px;max-width:860px;margin:0 auto;padding:16px;display:flex}.brand-lockup{flex:1;align-items:center;gap:12px;min-width:0;display:flex}.brand-mark{background:#eef2ff;border-radius:11px;flex:0 0 42px;place-items:center;width:42px;height:42px;font-size:1.3rem;line-height:1;text-decoration:none;transition:transform .15s;display:grid}.brand-mark:hover{transform:scale(1.06)}.brand-copy{flex-direction:column;align-items:flex-start;gap:2px;min-width:0;display:flex}.brand-copy h1{letter-spacing:-.02em;color:var(--text-main);word-break:keep-all;margin:0;font-size:1.15rem;font-weight:700;line-height:1.3}.brand-copy .subtitle{color:var(--text-muted);word-break:keep-all;margin:0;font-size:.82rem;line-height:1.3}.home-button{border:1px solid var(--border-color);color:#334155;white-space:nowrap;background:#f8fafc;border-radius:999px;flex-shrink:0;align-items:center;gap:6px;padding:8px 14px;font-size:.84rem;font-weight:600;text-decoration:none;transition:all .15s;display:inline-flex}.home-button:hover{border-color:var(--primary);color:var(--primary);background:#fff;transform:translateY(-1px)}.container{max-width:860px;margin:0 auto;padding:0 16px 48px}.main-card{border-radius:var(--radius-lg);border:1px solid var(--border-color);background:#fff;flex-direction:column;gap:24px;padding:28px 32px;display:flex;box-shadow:0 4px 20px #0f172a0f}.card-status-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.status-badges-group{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.badge{border-radius:12px;align-items:center;gap:5px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.badge-success{color:#166534;background:#dcfce7}.badge-neutral{color:var(--primary);background:#eef2ff}.badge-warning{color:#92400e;background:#fef3c7}.step-section{flex-direction:column;gap:12px;display:flex}.step-header{flex-wrap:wrap;align-items:center;gap:4px 8px;margin-bottom:2px;display:flex}.step-title-lockup{flex-shrink:0;align-items:center;gap:8px;display:inline-flex}.step-number{background-color:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:12px;font-weight:700;line-height:1;display:inline-flex}.step-title{color:var(--text-main);white-space:nowrap;font-size:14px;font-weight:700;line-height:1}.step-subtitle{color:var(--text-muted);font-size:13px;font-weight:400;line-height:1.4}.dropzone{border-radius:var(--radius-md);text-align:center;background-color:var(--bg-subtle);cursor:pointer;border:2px dashed #cbd5e1;flex-direction:column;align-items:center;gap:8px;padding:36px 20px;transition:all .2s;display:flex}.dropzone:hover,.dropzone.is-dragover{border-color:var(--primary);background-color:#eef2ff}.dropzone-icon{margin-bottom:4px;font-size:38px;line-height:1}.dropzone-title{color:var(--text-main);font-size:15px;font-weight:600}.highlight-text{color:var(--primary);text-underline-offset:3px;text-decoration:underline}.dropzone-hint{color:var(--text-muted);font-size:13px}.file-info-card{background:var(--bg-subtle);border-radius:var(--radius-md);border:1px solid var(--border-color);justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;display:flex}.file-info-left{align-items:center;gap:12px;min-width:0;display:flex}.file-format-tag{background:var(--primary);color:#fff;letter-spacing:.05em;border-radius:4px;flex-shrink:0;padding:3px 7px;font-size:11px;font-weight:700}.file-title{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.file-meta{color:var(--text-muted);margin-top:2px;font-size:12px}.file-actions-group{flex-shrink:0;align-items:center;gap:6px;display:flex}.sub-add-zone{background-color:var(--bg-subtle);border-radius:var(--radius-md);cursor:pointer;border:1px dashed #cbd5e1;justify-content:space-between;align-items:center;padding:12px 16px;transition:all .15s;display:flex}.sub-add-zone:hover{border-color:var(--primary);background-color:#eef2ff}.sub-add-left{align-items:center;gap:10px;display:flex}.sub-add-icon{font-size:18px}.sub-add-texts{flex-direction:column;display:flex}.sub-add-title{color:var(--text-main);font-size:14px;font-weight:600}.sub-add-desc{color:var(--text-muted);font-size:12px}.subtitle-tracks-container{flex-direction:column;gap:10px;margin-top:8px;display:flex}.track-item-card{border:1px solid var(--border-color);border-radius:var(--radius-md);background:#fff;flex-direction:column;gap:10px;padding:12px 16px;display:flex;box-shadow:0 1px 3px #00000005}.track-item-card.is-default-track{background:#fafbff;border-color:#c7d2fe}.track-card-top{justify-content:space-between;align-items:center;gap:10px;display:flex}.track-meta-left{flex-wrap:wrap;align-items:center;gap:8px;min-width:0;display:flex}.track-badge-num{color:var(--primary);background:#eef2ff;border-radius:4px;padding:2px 6px;font-size:11px;font-weight:700}.track-format-tag{color:#475569;background:#f1f5f9;border-radius:4px;padding:2px 6px;font-size:11px;font-weight:600}.track-orig-name{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;max-width:340px;font-size:13px;font-weight:600;overflow:hidden}.track-size-label{color:var(--text-muted);font-size:12px}.track-controls-right{align-items:center;gap:4px;display:flex}.btn-icon{border:1px solid var(--border-color);cursor:pointer;color:#475569;background:#fff;border-radius:6px;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;transition:all .15s;display:flex}.btn-icon:hover:not(:disabled){color:var(--primary);border-color:var(--primary);background:#f8fafc}.btn-icon:disabled{opacity:.35;cursor:not-allowed}.btn-icon-danger:hover:not(:disabled){color:#ef4444;background:#fef2f2;border-color:#fca5a5}.track-fields-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.field-group{flex-direction:column;gap:4px;display:flex}.field-group label{color:#475569;font-size:12px;font-weight:600}.form-select,.form-input{border:1px solid var(--border-color);box-sizing:border-box;background-color:#fff;border-radius:6px;outline:none;width:100%;padding:8px 10px;font-size:13px}.form-select:focus,.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 2px #4f46e526}.track-options-row{align-items:center;gap:12px;display:flex}.radio-label,.check-label{color:#475569;cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:5px;font-size:12px;display:inline-flex}.output-box{background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-direction:column;gap:12px;padding:16px 20px;display:flex}.output-desc{color:var(--text-muted);font-size:13px}.output-filename-row{align-items:center;display:flex}.filename-input{border-top-right-radius:0;border-bottom-right-radius:0;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}.extension-addon{border:1px solid var(--border-color);color:var(--primary);background:#f1f5f9;border-left:none;border-top-right-radius:6px;border-bottom-right-radius:6px;padding:8px 12px;font-size:13px;font-weight:600}.btn-primary{background:linear-gradient(135deg, var(--primary) 0%, #4338ca 100%);color:#fff;border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;width:100%;padding:14px;font-size:15px;font-weight:600;transition:opacity .15s,transform .1s;display:flex;box-shadow:0 4px 12px #4f46e540}.btn-primary:hover:not(:disabled){opacity:.95;transform:translateY(-1px)}.btn-primary:disabled{box-shadow:none;cursor:not-allowed;background:#cbd5e1}.btn-secondary{border:1px solid var(--border-color);cursor:pointer;background:#fff;border-radius:6px;align-items:center;gap:5px;padding:8px 14px;font-size:13px;font-weight:500;transition:background .15s;display:inline-flex}.btn-secondary:hover:not(:disabled){background:#f8fafc}.btn-danger-text{color:#ef4444;cursor:pointer;background:0 0;border:none;padding:4px 8px;font-size:12px}.progress-card{text-align:center;background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px}.progress-header-row{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.progress-text{color:var(--text-main);margin:0;font-size:15px;font-weight:700}.progress-percent{color:var(--primary);font-family:ui-monospace,monospace;font-size:14px;font-weight:700}.progress-track{background:#e2e8f0;border-radius:5px;height:10px;margin:12px 0;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--teal) 0%, var(--primary) 100%);width:0%;height:100%;transition:width .2s}.status-message{color:var(--text-muted);margin:0;font-size:13px}.completed-card{text-align:center;flex-direction:column;align-items:center;gap:20px;padding:16px 0;display:flex}.completed-icon-large{font-size:48px;line-height:1}.completed-title{color:var(--text-main);font-size:18px;font-weight:700}.completed-desc{color:var(--text-muted);margin-top:4px;font-size:14px}.result-summary-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;width:100%;display:grid}.result-summary-box{background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:left;align-items:center;gap:10px;padding:12px 14px;display:flex}.summary-box-icon{font-size:20px}.summary-box-texts{flex-direction:column;min-width:0;display:flex}.summary-box-label{color:var(--text-muted);font-size:11px}.summary-box-val{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:700;overflow:hidden}.tracks-tag-cloud{background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:left;flex-direction:column;gap:6px;width:100%;padding:12px 16px;display:flex}.tracks-cloud-label{color:var(--text-muted);font-size:12px;font-weight:600}.tracks-badges-row{flex-wrap:wrap;gap:6px;display:flex}.track-tag-pill{border:1px solid var(--border-color);color:var(--text-main);background:#fff;border-radius:4px;padding:3px 8px;font-size:12px}.actions-row{gap:10px;width:100%;display:flex}.actions-row .btn-primary{flex:2}.actions-row .btn-secondary{flex:1;justify-content:center}.track-notice-card{border-radius:var(--radius-md);color:#134e4a;background:#f0fdfa;border:1px solid #ccfbf1;flex-direction:column;padding:14px 16px;font-size:13px;line-height:1.5;display:flex}.track-notice-header{align-items:center;gap:8px;margin-bottom:8px;display:flex}.track-notice-icon{flex-shrink:0;font-size:16px;line-height:1}.track-notice-header strong{color:#0f766e;font-size:13.5px;font-weight:700;display:inline}.notice-list{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.notice-list li{color:#115e59;padding-left:14px;font-size:13px;line-height:1.5;position:relative}.notice-list li:before{content:"•";color:#0f766e;font-size:14px;line-height:1.4;position:absolute;top:0;left:0}.notice-list li strong{color:#0f766e;margin-right:4px;font-weight:700;display:inline}@media (width<=640px){.masthead{justify-content:space-between;align-items:center;gap:10px;padding:12px 16px}.brand-lockup{flex:auto;align-items:center;gap:10px;min-width:0}.brand-mark{border-radius:10px;flex:0 0 36px;width:36px;height:36px;font-size:1.15rem}.brand-copy h1{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:1.05rem;line-height:1.2;overflow:hidden}.brand-copy .subtitle{display:none!important}.home-button{flex-shrink:0;gap:4px;min-height:32px;padding:6px 12px;font-size:.82rem}.container{padding:0 10px 36px}.main-card{border-radius:12px;gap:18px;padding:20px 14px}.track-fields-grid{grid-template-columns:1fr;gap:8px}.actions-row{flex-direction:column}.actions-row .btn-primary,.actions-row .btn-secondary{width:100%}}