:root{--bar:#15171c;--pan:#1b1e24;--line:#2d323b;--tx:#d5d9e0;--mu:#8b93a1;--ac:#5aa9ff}
*{box-sizing:border-box}html,body{margin:0;height:100%}
body{display:flex;flex-direction:column;background:#101216;color:var(--tx);font:13px "Segoe UI",system-ui,sans-serif}
header{display:flex;align-items:center;gap:6px;padding:6px 10px;background:var(--bar);border-bottom:1px solid var(--line);flex-wrap:wrap}
.logo{margin-right:8px;font-size:14px}.sep{width:1px;height:22px;background:var(--line);margin:0 4px}.grow{flex:1}
button,select,input{font:inherit;color:var(--tx);background:#262b33;border:1px solid var(--line);border-radius:3px;padding:5px 9px}
button{cursor:pointer}button:hover{border-color:var(--ac)}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--ac)}
button.prim{background:var(--ac);color:#06121f;border-color:var(--ac);font-weight:600}
header input[type=number]{width:70px}
main{flex:1;display:flex;min-height:0}
#stage{flex:1;display:grid;place-items:center;position:relative;min-width:0;background:#0b0c0f}
#stage>canvas{grid-area:1/1;background:#000;outline:1px solid var(--line)}#ov{cursor:crosshair;touch-action:none;background:none!important}
#toast{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);background:var(--ac);color:#06121f;padding:6px 12px;border-radius:3px;opacity:0;transition:opacity .2s;pointer-events:none}#toast.on{opacity:1}
aside{width:300px;overflow:auto;background:var(--pan);border-left:1px solid var(--line);padding:10px}
h3{margin:12px 0 6px;font-size:13px;font-weight:600;color:var(--mu)}h3:first-child{margin-top:0}
#layers{list-style:none;margin:0;padding:0;border:1px solid var(--line);max-height:180px;overflow:auto}
#layers li{display:flex;gap:6px;align-items:center;padding:4px 6px;cursor:pointer;border-bottom:1px solid var(--line)}
#layers li.on{background:#26364a}#layers li span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#layers li button{padding:0 6px;border:0;background:none}#layers .empty{color:var(--mu);cursor:default}
aside label{display:flex;flex-direction:column;gap:3px;margin-bottom:8px;color:var(--mu)}aside label.row{flex-direction:row;align-items:center}
.btns{display:grid;grid-template-columns:1fr 1fr;gap:5px}
#nums{display:grid;grid-template-columns:90px 1fr 1fr;gap:5px;align-items:center}#nums label{margin:0}#nums input{width:100%}
.hint{color:var(--mu);line-height:1.5;margin-top:14px}