:root{--bg:#1b1d23;--bg-panel:#23262e;--bg-elem:#2c2f3a;--bg-elem-hover:#353948;--line:#3a3e4a;--text:#e6e8ee;--muted:#9aa0ad;--accent:#4f9dff;--accent-2:#34c08a;--danger:#ff6b6b;--radius:8px}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:13px;overflow:hidden}#app{width:100vw;height:100vh;display:flex}#sidebar{background:var(--bg-panel);border-right:1px solid var(--line);flex-direction:column;width:340px;min-width:340px;height:100%;display:flex;overflow-y:auto}#brand{border-bottom:1px solid var(--line);padding:16px 16px 8px}#brand h1{letter-spacing:.2px;margin:0;font-size:18px}.muted{color:var(--muted);margin:4px 0 0;font-size:12px}#controls{padding:8px 12px 40px}#viewport{flex:1;height:100%;position:relative}#three-canvas{width:100%;height:100%;display:block}#overlay-top{z-index:5;pointer-events:none;gap:8px;display:flex;position:absolute;top:12px;left:12px}.badge{border:1px solid var(--line);color:var(--text);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#14161cc7;border-radius:6px;padding:5px 10px;font-size:12px}.badge:empty{display:none}#status.busy{color:var(--accent)}#status.error{color:var(--danger)}.section{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elem);margin-bottom:10px;overflow:hidden}.section>.section-head{cursor:pointer;-webkit-user-select:none;user-select:none;background:var(--bg-elem);justify-content:space-between;align-items:center;padding:10px 12px;font-weight:600;display:flex}.section>.section-head:hover{background:var(--bg-elem-hover)}.section>.section-head .chev{color:var(--muted);transition:transform .15s}.section.collapsed>.section-head .chev{transform:rotate(-90deg)}.section>.section-body{padding:4px 12px 12px}.section.collapsed>.section-body{display:none}.row{grid-template-columns:1fr auto;align-items:center;gap:8px;margin:8px 0;display:grid}.row>label{color:var(--muted)}.row.full{grid-template-columns:1fr}.slider-row{grid-template-columns:1fr;gap:4px;margin:10px 0;display:grid}.slider-row .slider-top{justify-content:space-between;align-items:center;display:flex}.slider-row .slider-top label{color:var(--muted)}.slider-row .slider-top output{font-variant-numeric:tabular-nums;color:var(--text)}input[type=range]{width:100%;accent-color:var(--accent)}input[type=text],input[type=number],select,textarea{background:var(--bg);border:1px solid var(--line);color:var(--text);border-radius:6px;width:100%;padding:6px 8px;font-family:inherit;font-size:13px}input[type=number]{width:72px}textarea{resize:vertical;min-height:38px}input[type=color]{-webkit-appearance:none;appearance:none;border:1px solid var(--line);cursor:pointer;background:0 0;border-radius:6px;width:34px;height:26px;padding:0}input[type=color]::-webkit-color-swatch-wrapper{padding:2px}input[type=color]::-webkit-color-swatch{border:none;border-radius:4px}input[type=checkbox]{accent-color:var(--accent);width:16px;height:16px}button{background:var(--bg-elem);color:var(--text);border:1px solid var(--line);cursor:pointer;border-radius:6px;padding:8px 10px;font-family:inherit;font-size:13px}button:hover{background:var(--bg-elem-hover)}button.primary{background:var(--accent);border-color:var(--accent);color:#06203f;font-weight:600}button.primary:hover{filter:brightness(1.08)}button.ghost{background:0 0}button:disabled{opacity:.5;cursor:not-allowed}.btn-row{flex-wrap:wrap;gap:8px;display:flex}.btn-row>button{flex:1}.file-drop{border:1px dashed var(--line);text-align:center;color:var(--muted);cursor:pointer;border-radius:6px;padding:12px;transition:border-color .15s,color .15s}.file-drop:hover,.file-drop.drag{border-color:var(--accent);color:var(--text)}.file-drop input{display:none}.region-list{flex-direction:column;gap:6px;margin-top:8px;display:flex}.region-item{background:var(--bg);border:1px solid var(--line);border-radius:6px;grid-template-columns:auto auto 1fr;align-items:center;gap:8px;padding:5px 6px;display:grid}.region-item .name{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.svg-preview{border:1px solid var(--line);background:#fff;border-radius:6px;width:100%;height:150px;margin-top:8px;display:block}.hint{color:var(--muted);margin:6px 0 0;font-size:11px;line-height:1.4}.swatch-mini{border:1px solid #fff3;border-radius:3px;width:14px;height:14px}.inline{align-items:center;gap:8px;display:flex}.inline>*{margin:0}hr.sep{border:none;border-top:1px solid var(--line);margin:12px 0}