:root{--bg:#f3f5f8;--panel:#fff;--line:#d9dee7;--text:#1f2430;--muted:#6b7385;--accent:#2563eb;--accent-soft:#e3ecfd;--danger:#c62828}*{box-sizing:border-box}html,body{height:100%;margin:0}body{color:var(--text);background:var(--bg);flex-direction:column;font:14px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;display:flex;overflow:hidden}header{background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:8px;padding:8px 12px;display:flex}header .title{margin-right:4px;font-weight:700}#docName{width:220px}input[type=text],select{font:inherit;border:1px solid var(--line);color:var(--text);background:#fff;border-radius:6px;padding:6px 8px}aside input[type=text],aside select{width:100%}button{font:inherit;border:1px solid var(--line);color:var(--text);cursor:pointer;background:#fff;border-radius:6px;padding:6px 10px}button:hover:not(:disabled){background:#f0f3f8}button:disabled{opacity:.45;cursor:default}button.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover{background:#1d4fd0}button.danger{color:var(--danger)}.sep{background:var(--line);align-self:stretch;width:1px;margin:0 4px}.spacer{flex:1}main{flex:1;min-height:0;display:flex}aside{background:var(--panel);border-right:1px solid var(--line);width:250px;padding:12px;overflow:auto}aside.right{border-right:0;border-left:1px solid var(--line);width:240px}h3{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:14px 0 6px;font-size:11px}h3:first-child{margin-top:0}.tools{grid-template-columns:repeat(2,1fr);gap:6px;display:grid}.tools button{text-align:left}.palette{grid-template-columns:repeat(3,1fr);gap:6px;display:grid}.palette button{text-align:center;flex-direction:column;align-items:center;gap:2px;padding:6px 2px;font-size:10.5px;line-height:1.15;display:flex}.palette svg{width:34px;height:34px}.wires{flex-direction:column;gap:4px;display:flex}.wires button{text-align:left;align-items:center;gap:8px;display:flex}.wires i{border-top:3px solid;width:26px;height:0;display:inline-block}#stage{background:#fff;flex:1;min-width:0;position:relative}#svg{touch-action:none;width:100%;height:100%;display:block}#hint{color:#fff;pointer-events:none;background:#1f2430e0;border-radius:6px;max-width:70%;padding:6px 10px;font-size:12.5px;position:absolute;bottom:12px;left:12px}#zoomBox{gap:4px;display:flex;position:absolute;bottom:12px;right:12px}#empty{pointer-events:none;color:var(--muted);text-align:center;justify-content:center;align-items:center;padding:24px;display:flex;position:absolute;inset:0}#empty div{border:1px dashed var(--line);background:#ffffffe6;border-radius:10px;max-width:420px;padding:16px 20px}label.f{color:var(--muted);margin:8px 0 4px;font-size:12px;display:block}.row{flex-wrap:wrap;gap:6px;margin-top:10px;display:flex}.muted{color:var(--muted);font-size:12.5px}kbd{border:1px solid var(--line);background:#eef1f6;border-radius:4px;padding:0 4px;font-size:11px}.menu{position:relative}.menu .drop{border:1px solid var(--line);z-index:10;background:#fff;border-radius:8px;min-width:170px;margin-top:4px;padding:4px;display:none;position:absolute;top:100%;right:0;box-shadow:0 6px 20px #0000001f}.menu.open .drop{display:block}.menu .drop button{text-align:left;border:0;width:100%;display:block}