.container{background:#fff;border-radius:16px;max-width:1200px;margin:20px auto 0;overflow:hidden;box-shadow:0 20px 40px #0000001a}.header{color:#fff;text-align:center;background:linear-gradient(90deg,#4f46e5,#7c3aed)}.upload-area{text-align:center;cursor:pointer;border:3px dashed #d1d5db;border-radius:12px;margin:20px;padding:40px;transition:all .3s}.upload-area:hover{background:#f8fafc;border-color:#4f46e5}.upload-area.dragover{background:#eff6ff;border-color:#4f46e5}.upload-area.loading{cursor:not-allowed;pointer-events:none;opacity:.8}.loading-spinner{border:4px solid #e5e7eb;border-top-color:#4f46e5;border-radius:50%;width:48px;height:48px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.editor-section{padding:20px;display:none}.video-container{background:#000;border-radius:8px;justify-content:center;margin-bottom:20px;display:flex;position:relative;overflow:hidden}#videoPreview{object-fit:contain;width:auto;max-width:100%;height:auto;max-height:min(52vh,480px);display:block}.export-section{text-align:center;background:#f8fafc;border-top:1px solid #e2e8f0;padding:20px}.format-selector{justify-content:center;gap:20px;margin-bottom:20px;display:flex}.format-option{cursor:pointer;border-radius:6px;align-items:center;gap:8px;padding:8px 12px;transition:background-color .2s;display:flex}.format-option:hover{background-color:#e2e8f0}.format-option input[type=radio]{margin:0;transform:scale(1.2)}.progress-container{margin:20px 0;display:none}.progress-bar{background:#e2e8f0;border-radius:4px;width:100%;height:8px;overflow:hidden}.progress-fill{background:linear-gradient(90deg,#4f46e5,#7c3aed);width:0%;height:100%;transition:width .3s}.progress-text{color:#64748b;margin-top:10px;font-size:14px}.timeline-container{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;margin-bottom:20px;padding:20px}.timeline{cursor:pointer;background:#e2e8f0;border-radius:4px;height:60px;margin:25px 0 10px;position:relative;overflow:visible}.timeline-track{background:linear-gradient(90deg,#94a3b8,#64748b);width:100%;height:100%;position:absolute;top:0;left:0}.segment{cursor:pointer;opacity:.8;background:linear-gradient(90deg,#10b981,#059669);border:2px solid #065f46;border-radius:4px;height:52px;position:absolute;top:4px;overflow:visible}.segment-content{pointer-events:none;z-index:5;flex-direction:column;justify-content:center;align-items:center;display:flex;position:absolute;inset:0 8px}.segment-duration{color:#fff;text-shadow:0 1px 2px #00000080;white-space:nowrap;background:#0000004d;border-radius:2px;padding:1px 4px;font-size:10px;font-weight:700}.segment-label{color:#1f2937;white-space:nowrap;pointer-events:none;z-index:30;background:#fff;border:1px solid #d1d5db;border-radius:4px;padding:3px 6px;font-size:11px;font-weight:600;position:absolute;box-shadow:0 2px 4px #0000001a}.segment-label.start{top:-28px;left:-2px}.segment-label.end{top:58px;right:-2px}.segment:hover{opacity:1}.segment.selected{opacity:1;background:linear-gradient(90deg,#3b82f6,#2563eb);border-color:#1d4ed8;box-shadow:0 0 0 2px #3b82f680}.segment.preview{opacity:.9;background:linear-gradient(90deg,#f59e0b,#d97706);border-color:#92400e}.segment-handle{cursor:ew-resize;opacity:.3;z-index:15;pointer-events:auto;background:#ffffffe6;border-radius:2px;width:8px;height:100%;transition:opacity .2s;position:absolute;top:0}.segment-handle.start{left:0}.segment-handle.end{right:0}.segment:hover .segment-handle,.segment.selected .segment-handle{opacity:1;background:#fff}.segment-handle:hover{opacity:1;background:#fff;box-shadow:0 0 4px #0000004d}.playhead{pointer-events:none;z-index:10;background:#ef4444;width:3px;height:100%;position:absolute;top:0}.time-labels{color:#64748b;justify-content:space-between;margin-top:5px;font-size:12px;display:flex}.controls{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-bottom:20px;display:grid}.control-group{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;padding:15px}.control-group h3{color:#374151;margin-bottom:10px;font-size:14px}.segments-list{background:#fff;border:1px solid #e2e8f0;border-radius:6px;max-height:200px;overflow-y:auto}.segment-item{cursor:pointer;border-bottom:1px solid #f1f5f9;justify-content:space-between;align-items:center;padding:8px 12px;transition:background-color .2s;display:flex}.segment-item:hover{background-color:#f8fafc}.segment-item.selected{background-color:#eff6ff;border-left:3px solid #3b82f6}.segment-item:last-child{border-bottom:none}.segment-times{color:#64748b;font-family:monospace;font-size:12px}.btn{color:#fff;cursor:pointer;background:#4f46e5;border:none;border-radius:6px;padding:10px 16px;font-size:14px;transition:all .2s}.btn:hover{background:#4338ca;transform:translateY(-1px)}.btn:disabled{cursor:not-allowed;background:#9ca3af;transform:none}.btn-small{padding:6px 10px;font-size:12px}.btn-danger{background:#ef4444}.btn-danger:hover{background:#dc2626}.btn-success{background:#10b981}.btn-success:hover{background:#059669}.time-input{gap:10px;margin:10px 0;display:flex}.time-input input{text-align:center;border:1px solid #d1d5db;border-radius:4px;width:80px;padding:8px;font-family:monospace}.segment-progress-item{background:#f8fafc;border:1px solid #e2e8f0;border-radius:6px;margin-bottom:8px;padding:12px}.segment-progress-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.segment-progress-title{color:#374151;font-size:14px;font-weight:500}.segment-progress-status{color:#6b7280;font-family:monospace;font-size:12px}.segment-progress-status.pending{color:#6b7280}.segment-progress-status.processing{color:#3b82f6;font-weight:600}.segment-progress-status.completed{color:#10b981;font-weight:600}.segment-progress-status.error{color:#ef4444;font-weight:600}.segment-progress-bar{background:#e5e7eb;border-radius:3px;height:6px;overflow:hidden}.segment-progress-fill{background:#3b82f6;height:100%;transition:width .3s}.segment-result-item{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;gap:10px;padding:15px;display:grid}.segment-result-header{justify-content:space-between;align-items:center;display:flex}.segment-result-title{color:#374151;font-size:14px;font-weight:600}.segment-result-info{color:#6b7280;font-family:monospace;font-size:12px}.segment-result-video{background:#000;border-radius:4px;width:100%;max-width:300px;margin:0 auto;display:block}.segment-result-actions{justify-content:center;gap:8px;display:flex}.segment-result-actions .btn{flex:1;max-width:150px}@media (width<=768px){.format-selector{flex-direction:column;align-items:center;gap:12px}.format-option{justify-content:center;min-width:200px;padding:12px 16px}.controls{grid-template-columns:1fr}.container{border-radius:8px;width:auto;margin:10px}.header{padding:16px}.timeline{height:100px;margin:35px 0 20px}.segment{height:92px;top:4px}.segment-handle{opacity:.8;background:#fffffff2;border-radius:4px;width:min(20px,50%);height:100%;position:absolute;top:0}.segment-handle.start{left:0}.segment-handle.end{right:0}.segment:hover .segment-handle,.segment.selected .segment-handle{opacity:1;background:#fff;width:min(24px,50%)}.segment-duration{padding:2px 6px;font-size:12px}.segment-label{padding:4px 8px;font-size:12px}.segment-label.start{top:-32px}.segment-label.end{top:104px}.segment:not(.selected) .segment-label{display:none}.segment-content{left:20px;right:20px}.segment-result-header{flex-direction:column;align-items:center;gap:2px}}@media (pointer:coarse){.btn,.format-option{min-height:44px}.time-input input{width:96px;min-height:44px;font-size:16px}}.split-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:18px;display:flex}.btn-secondary{color:#3730a3;background:#eef2ff;border:1px solid #c7d2fe}.btn-secondary:hover{background:#e0e7ff}.split-dialog{color:#111827;background:#fff;border:1px solid #e5e7eb;border-radius:28px;width:min(520px,100vw - 32px);max-width:none;max-height:min(760px,100dvh - 48px);margin:auto;padding:22px;overflow-y:auto;box-shadow:0 24px 80px #0f172a38}.split-dialog::backdrop{backdrop-filter:blur(2px);background:#0f172a7a}.split-dialog-content{gap:22px;display:grid}.split-dialog-header{grid-template-columns:48px 1fr 48px;align-items:center;gap:10px;display:grid}.split-dialog-header h2{text-align:center;margin:0;font-size:20px;font-weight:650;line-height:1.2}.split-dialog-close,.split-dialog-confirm{cursor:pointer;border-radius:50%;place-items:center;width:48px;height:48px;font-size:30px;line-height:1;display:grid}.split-dialog-close{color:#111827;background:#fff;border:1px solid #e5e7eb}.split-dialog-confirm{color:#fff;background:#1689f8;border:0;font-size:26px}.split-dialog-confirm:disabled{opacity:.5;cursor:not-allowed}.split-dialog-summary{text-align:center;text-wrap:balance;min-height:48px;margin:2px 0 0;font-size:16px;line-height:1.5}.split-dialog-note{color:#64748b;text-align:center;margin:-14px 0 0;font-size:13px;line-height:1.4}.split-field{justify-items:center;gap:12px;padding:10px 0 18px;display:grid}.split-field[hidden],.split-dialog-error[hidden]{display:none}.split-field>label{color:#475569;font-size:14px;font-weight:600}.split-stepper{background:#f1f5f9;border-radius:999px;align-items:center;gap:12px;min-height:58px;padding:6px 10px;display:flex}.split-step{color:#111827;cursor:pointer;background:#fff;border:0;border-radius:50%;place-items:center;width:42px;height:42px;font-size:25px;line-height:1;display:grid}.split-stepper input{color:#111827;text-align:center;font-variant-numeric:tabular-nums;background:0 0;border:0;outline:0;width:100px;padding:4px;font-size:32px}.split-stepper input::-webkit-inner-spin-button,.split-stepper input::-webkit-outer-spin-button{appearance:none;margin:0}.split-unit{color:#64748b;margin-left:-10px;font-size:15px}.split-stepper-large{min-height:82px}.split-stepper-large input{width:160px;font-size:clamp(64px,16vw,94px)}.split-dialog-error{color:#b91c1c;text-align:center;margin:-18px 0 0;font-size:14px}@media (width<=600px){.split-dialog{width:100%;max-height:min(82dvh,680px);padding:20px 18px max(24px, env(safe-area-inset-bottom));border-bottom:0;border-radius:28px 28px 0 0;margin:0;position:fixed;inset:auto 0 0}.split-dialog-content{gap:20px}.split-dialog-summary{font-size:15px}.split-field{padding:12px 0 22px}}@media (prefers-reduced-motion:no-preference){.split-dialog[open]{animation:.16s ease-out split-sheet-enter}@keyframes split-sheet-enter{0%{opacity:0;transform:translateY(10px)scale(.99)}to{opacity:1;transform:translateY(0)scale(1)}}}