:root{--bg: #0d0d0d;--bg-elev: #141414;--bg-elev-2: #1c1c1c;--bg-elev-3: #242424;--border: #2a2a2a;--border-strong: #3a3a3a;--text: #ededed;--text-dim: #9e9e9e;--text-faint: #6b6b6b;--accent: #ffffff;--accent-dim: #cfcfcf;--on-accent: #0d0d0d;--warn: #d8a13a;--danger: #e05a5a;--radius: 6px;--control-h: 32px;--panel-w: 296px;--header-h: 48px;--pad: 12px;--gap: 8px;color-scheme:dark}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;overflow:hidden}button,input,select{font:inherit;color:inherit}.app{display:grid;grid-template-rows:var(--header-h) 1fr;height:100%}.header{position:relative;display:flex;align-items:center;gap:var(--gap);padding:0 var(--pad);border-bottom:1px solid var(--border);background:var(--bg-elev);min-width:0}.header>.toolbar-group{overflow:hidden}.brand{font-weight:650;letter-spacing:.2px}.spacer{flex:1}.body{display:grid;grid-template-columns:var(--panel-w) 1fr;min-height:0}.panel{border-right:1px solid var(--border);background:var(--bg-elev);overflow-y:auto;overscroll-behavior:contain}.toolbar-group{display:flex;align-items:center;gap:6px;flex:none}.toolbar-sep{width:1px;height:22px;margin:0 5px;background:var(--border);flex:none}.toolbar-hint{margin-left:4px;font-size:11.5px;color:var(--text-faint);font-variant-numeric:tabular-nums;white-space:nowrap}button.icon{min-width:32px;padding:0;font-size:13px;line-height:1}.help-pop{position:absolute;top:calc(100% + 6px);right:var(--pad);z-index:20;width:290px;padding:12px 14px 14px;border-radius:10px;border:1px solid var(--border);background:var(--bg-elev-2);box-shadow:0 18px 40px #00000073}.help-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.help-head b{font-size:13px;font-weight:600}.help-list{margin:0;display:flex;flex-direction:column;gap:9px;font-size:12px}.help-list>div{display:flex;align-items:baseline;gap:10px}.help-list dt{flex:none;width:92px;color:var(--text-dim);text-align:right}.help-list dd{margin:0;color:var(--text)}.help-list kbd+kbd{margin-left:3px}.help-list kbd{display:inline-block;min-width:18px;padding:1px 5px;border-radius:4px;border:1px solid var(--border);background:var(--bg-elev);font-family:ui-monospace,monospace;font-size:11px;text-align:center;color:var(--text-dim)}.group{border-bottom:1px solid var(--border)}.group>summary{display:flex;align-items:center;gap:8px;padding:10px var(--pad);cursor:pointer;font-weight:600;font-size:11.5px;letter-spacing:.3px;text-transform:uppercase;color:var(--text-dim);user-select:none;list-style:none}.group>summary::-webkit-details-marker{display:none}.group>summary:before{content:"▸";font-size:10px;transition:transform .12s ease;color:var(--text-faint)}.group[open]>summary:before{transform:rotate(90deg)}.group-body{padding:0 var(--pad) 12px;display:flex;flex-direction:column;gap:10px}.field{display:flex;flex-direction:column;gap:4px}.field-label{display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:11.5px;color:var(--text-dim)}.field-label .value{color:var(--text);font-variant-numeric:tabular-nums;font-size:12px}.row{display:flex;align-items:center;gap:8px}input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:18px;background:transparent;cursor:pointer}input[type=range]::-webkit-slider-runnable-track{height:3px;border-radius:2px;background:linear-gradient(to right,var(--accent) 0%,var(--accent) var(--fill, 0%),var(--bg-elev-2) var(--fill, 0%),var(--bg-elev-2) 100%)}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;margin-top:-5px;border-radius:50%;background:var(--accent);border:none}input[type=range]:hover::-webkit-slider-thumb{box-shadow:0 0 0 5px #ffffff1f}input[type=range]::-moz-range-track{height:3px;border-radius:2px;background:var(--bg-elev-2)}input[type=range]::-moz-range-progress{height:3px;border-radius:2px;background:var(--accent)}input[type=range]::-moz-range-thumb{width:13px;height:13px;border:none;border-radius:50%;background:var(--accent)}input[type=number],select{height:30px;min-width:0;width:100%;padding:0 8px;border-radius:5px;border:1px solid var(--border);background:var(--bg-elev-2)}input[type=number]:focus,select:focus,button:focus-visible{outline:1.5px solid var(--accent);outline-offset:1px}button{height:var(--control-h);padding:0 14px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-elev-2);cursor:pointer;transition:background .1s ease,border-color .1s ease}button:hover:not(:disabled){background:var(--bg-elev-3)}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}button.primary:hover:not(:disabled){background:var(--accent-dim)}button.primary:disabled{background:var(--bg-elev-2);border-color:var(--border);color:var(--text-faint)}button.small{height:30px;padding:0 10px;font-size:12px}.toggle{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:28px;cursor:pointer;user-select:none}.toggle input{appearance:none;-webkit-appearance:none;position:relative;width:32px;height:18px;border-radius:9px;background:var(--bg-elev-2);border:1px solid var(--border);cursor:pointer;transition:background .12s ease;flex:none}.toggle input:after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;border-radius:50%;background:var(--text-faint);transition:transform .12s ease,background .12s ease}.toggle input:checked{background:var(--accent);border-color:var(--accent)}.toggle input:checked:after{transform:translate(14px);background:var(--on-accent)}.presets{display:flex;flex-wrap:wrap;gap:6px;padding:10px var(--pad);border-bottom:1px solid var(--border)}.chip{height:26px;padding:0 11px;font-size:11.5px;border-radius:999px;background:transparent;border-color:var(--border-strong);color:var(--text-dim)}.chip.active{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}.output-size{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin-top:-2px;padding:6px 9px;border-radius:5px;background:var(--bg-elev-2);font-size:11.5px;color:var(--text-dim)}.output-size b{color:var(--text);font-variant-numeric:tabular-nums;font-weight:600}.ghost{background:transparent;border-color:transparent;color:var(--text-dim)}.ghost:hover:not(:disabled){background:var(--bg-elev-2);color:var(--text)}.link-button{display:inline-flex;align-items:center;height:32px;padding:0 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-elev-2);color:var(--text);font-size:13px;text-decoration:none;transition:background .1s ease}.link-button:hover{background:#262b3a}.viewer{position:relative;min-width:0;background:var(--bg);overflow:hidden}.viewer canvas{display:block;width:100%;height:100%;touch-action:none}.split-handle{position:absolute;top:0;bottom:0;width:22px;margin-left:-11px;cursor:ew-resize;display:grid;place-items:center;touch-action:none}.split-handle .bar{width:2px;height:100%;background:#ffffffbf;box-shadow:0 0 0 1px #00000080}.split-handle .knob{position:absolute;width:28px;height:28px;border-radius:50%;background:#ffffffeb;color:#111;display:grid;place-items:center;font-size:11px;box-shadow:0 1px 6px #00000080}.statusbar{position:absolute;left:12px;bottom:12px;display:flex;gap:14px;align-items:center;padding:6px 11px;border-radius:6px;background:#0c0e14c7;border:1px solid var(--border);font-size:11.5px;color:var(--text-dim);font-variant-numeric:tabular-nums;backdrop-filter:blur(6px);pointer-events:none}.statusbar b{color:var(--text);font-weight:600}.badge{padding:1px 6px;border-radius:999px;font-size:10.5px;border:1px solid var(--border)}.badge.warn{color:var(--warn);border-color:#f0b42966}.viewer-tools{position:absolute;right:12px;bottom:12px;display:flex;align-items:center;gap:3px;padding:4px;border-radius:8px;background:#0c0e14c7;border:1px solid var(--border);backdrop-filter:blur(6px)}.viewer-tools .tool{height:30px;min-width:32px;padding:0 7px;border:none;border-radius:6px;background:transparent;color:var(--text-dim);font-size:14px;line-height:1}.viewer-tools .tool:hover:not(:disabled){background:var(--bg-elev-2);color:var(--text)}.viewer-tools .tool:disabled{opacity:.3}.viewer-tools .tool.readout{min-width:46px;font-size:12px;color:var(--text);font-variant-numeric:tabular-nums}.busy-dot{position:absolute;top:14px;right:14px;width:8px;height:8px;border-radius:50%;background:var(--accent);animation:breathe 1.1s ease-in-out infinite}@keyframes breathe{0%,to{opacity:.25;transform:scale(.8)}50%{opacity:1;transform:scale(1.15)}}.progress-track{position:absolute;top:0;left:0;right:0;height:2px;background:transparent}.progress-track>i{display:block;height:100%;background:var(--accent);transition:width .12s linear}.dropzone{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:10px;text-align:center;color:var(--text-dim);background:var(--bg);padding:24px}.dropzone.dragging{outline:2px dashed var(--accent);outline-offset:-14px;background:#101010}.dropzone h2{margin:0;font-size:17px;color:var(--text);font-weight:600}.examples{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:6px}.example{width:84px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:var(--bg-elev);cursor:pointer;padding:0;height:auto}.example img{display:block;width:100%;height:62px;object-fit:cover;image-rendering:auto}.example span{display:block;font-size:10.5px;padding:4px 2px 6px;color:var(--text-dim);text-align:center}.hint kbd{padding:1px 5px;border-radius:4px;border:1px solid var(--border);background:var(--bg-elev-2);font-size:11px;font-family:ui-monospace,monospace}.error-banner{margin:0;padding:10px 14px;background:#f2555a1f;border-bottom:1px solid rgba(242,85,90,.5);color:#f0c9c9;font-size:12.5px}.unsupported{max-width:560px;margin:12vh auto;padding:28px;border:1px solid var(--border);border-radius:14px;background:var(--bg-elev);text-align:center}.unsupported h1{font-size:20px;margin:0 0 10px}.unsupported p{color:var(--text-dim);margin:6px 0}@media(max-width:820px){.app{grid-template-rows:auto 1fr}.body{grid-template-columns:1fr;grid-template-rows:1fr auto}.panel{border-right:none;border-top:1px solid var(--border);max-height:46vh}.viewer{order:-1}.header{height:auto;flex-wrap:wrap;row-gap:8px;padding:8px 12px}.toolbar-hint{display:none}.header .spacer{flex-basis:100%;height:0}.help-pop{right:12px;left:12px;width:auto}.viewer-tools{right:8px;top:8px;bottom:auto}.statusbar{left:8px;right:8px;bottom:8px;gap:8px;padding:4px 8px;font-size:11px;flex-wrap:wrap}}