:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#e8eef9;background:#060a12;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:1100px;background:radial-gradient(circle at top,#10182a 0,#060a12 42%,#03050a)}button,input{font:inherit}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{height:72px;border-bottom:1px solid #1d2637;background:#050910e0;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:5}.brand{display:flex;gap:12px;align-items:center}.brand strong{display:block;font-size:14px;letter-spacing:.2px}.brand span{display:block;color:#7f8ca6;font-size:12px;margin-top:2px}.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,#38bdf8,#a78bfa);color:#06101f;box-shadow:0 0 32px #38bdf83b}.top-actions{display:flex;gap:10px}.ghost,.primary{border:1px solid #263147;border-radius:10px;background:#111827;color:#dbe7f9;padding:10px 14px;display:flex;align-items:center;gap:8px;font-weight:650}.primary{background:linear-gradient(135deg,#38bdf8,#8b5cf6);color:#08111f;border:none}.primary.full{width:100%;justify-content:center}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 390px;min-height:calc(100vh - 72px)}.preview-pane{padding:24px;border-right:1px solid #1d2637;display:flex;flex-direction:column;gap:14px}.preview-frame{position:relative;width:100%;aspect-ratio:16/9;border-radius:16px;overflow:hidden;background:#08111f;border:1px solid #1d2637;box-shadow:0 20px 80px #0000004d}canvas{width:100%;height:100%;display:block}.preview-overlay{position:absolute;left:14px;right:14px;top:14px;display:flex;justify-content:space-between;pointer-events:none}.source-pill,.youtube-warning{display:flex;align-items:center;gap:8px;background:#04080f99;border:1px solid rgba(148,163,184,.2);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:7px 10px;border-radius:999px;font-size:12px;color:#dce6f6}.youtube-warning{color:#fdba74}.transport{display:flex;align-items:center;gap:12px;padding:10px 2px}.round{width:38px;height:38px;border-radius:50%;border:1px solid #2a3650;background:#111827;color:#fff;display:grid;place-items:center}.seek-wrap{flex:1;display:flex;align-items:center;gap:14px}.seek-wrap input{flex:1}.time{font-variant-numeric:tabular-nums;color:#93a2ba;font-size:12px;min-width:95px;text-align:right}.control-pane{background:#080d17bf;display:flex;flex-direction:column;min-height:0}.tabs{display:grid;grid-template-columns:repeat(3,1fr);padding:10px;border-bottom:1px solid #1d2637;gap:4px}.tabs button{background:transparent;border:1px solid transparent;color:#74839d;padding:10px 8px;border-radius:9px;display:flex;align-items:center;justify-content:center;gap:6px}.tabs button.active{background:#111a2b;border-color:#27334a;color:#e6efff}.panel-content{padding:18px 18px 24px;overflow:auto;min-height:0}.panel-content h2{margin:0;font-size:18px}.panel-content h3{font-size:13px;margin:22px 0 10px}.muted{color:#7e8aa1;font-size:12px;line-height:1.5}.upload-box{width:100%;border:1px dashed #34415a;background:#0c1321;color:#dfe8f5;border-radius:12px;padding:18px;display:flex;align-items:center;gap:12px;text-align:left}.upload-box span{display:flex;flex-direction:column}.upload-box small{color:#7c8ba4;margin-top:2px}.divider{display:flex;align-items:center;gap:9px;color:#58657b;font-size:11px;margin:15px 0}.divider:before,.divider:after{content:"";height:1px;background:#1d2637;flex:1}.field{margin-top:14px}.field label,.range-head label{font-size:11px;color:#8d9ab2}.inline{display:flex;gap:7px;margin-top:7px}.inline input,.field input[type=number]{width:100%;background:#0c1321;border:1px solid #28344b;color:#dbe7f9;border-radius:8px;padding:9px 10px;outline:none}.inline button{border:1px solid #2d3a52;background:#10192a;color:#dce7f9;border-radius:8px;padding:0 11px;display:flex;align-items:center;gap:6px}.notice{margin-top:14px;padding:11px 12px;border:1px solid #25334b;background:#0b1220;border-radius:10px;display:flex;gap:10px;color:#9eb0cb;font-size:11px;line-height:1.5}.notice strong{color:#dce8fa}.notice p{margin:3px 0 0}.notice svg{flex:0 0 auto;margin-top:2px;color:#7dd3fc}.error-box{margin:0 18px 18px;border:1px solid #7f1d1d;background:#2a0e13;color:#fecaca;border-radius:10px;padding:10px 12px;font-size:11px;line-height:1.5}.preset-grid{display:grid;gap:8px}.preset-card{display:grid;grid-template-columns:52px 1fr;gap:11px;align-items:center;text-align:left;border:1px solid #202c41;background:#0b1220;border-radius:10px;padding:8px;color:#dce7f6}.preset-card strong{font-size:12px;display:block}.preset-card span{display:block;font-size:10px;color:#77859d;line-height:1.35;margin-top:2px}.preset-swatch{width:52px;height:38px;border-radius:7px;border:1px solid rgba(255,255,255,.06)}.segmented{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin-top:8px}.segmented button{border:1px solid #263248;background:#0c1321;color:#8190a9;padding:8px 4px;border-radius:8px;font-size:11px}.segmented button.selected{background:#132136;color:#dfeaff;border-color:#355070}.range-field{margin-top:13px}.range-head{display:flex;justify-content:space-between;align-items:center}.range-head span{font-size:10px;color:#aebbd0;font-variant-numeric:tabular-nums}.range-field input{width:100%}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}.two-col .field{margin-top:13px}.two-col input[type=color]{width:100%;height:34px;padding:3px;background:#0c1321;border:1px solid #28344b;border-radius:8px}.check{display:flex;gap:8px;align-items:center;font-size:11px;color:#9aabc3;margin-top:12px}.check input{accent-color:#38bdf8}.export-card{margin-top:18px;border:1px solid #24324a;background:#0b1220;border-radius:12px;padding:14px}.export-card strong{display:block;font-size:13px}.export-card span{display:block;color:#7888a2;font-size:11px;margin-top:3px;margin-bottom:13px}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;height:4px;border-radius:999px;background:#263147;outline:none;margin-top:8px}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:13px;height:13px;border-radius:50%;background:#d9e8ff;border:2px solid #79baf4;box-shadow:0 0 0 4px #38bdf81f}@media(max-width:1200px){body{min-width:0}.workspace{grid-template-columns:1fr}.control-pane{border-top:1px solid #1d2637}.preview-pane{border-right:none}}