:root{--bg:#0b0f12;--panel:#11161b;--card:#171d23;--accent:#2aa3ff;--text:#e6edf3;--muted:#9fb0bf;--danger:#ff5263}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,Segoe UI,Roboto,Inter,Helvetica,Arial,sans-serif}
.topbar{height:56px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:#0d141a;border-bottom:1px solid #10161d;position:sticky;top:0;z-index:10}
.brand{display:flex;align-items:center;gap:10px;color:#d9e7f5}.brand .dot{width:10px;height:10px;background:var(--accent);border-radius:50%}
.actions{display:flex;gap:10px}
button,.primary{border:1px solid #263240;background:#15202b;color:var(--text);padding:8px 12px;border-radius:10px;cursor:pointer;text-decoration:none}
button.ghost{background:transparent;border-color:#2a3a4b}button.danger{border-color:var(--danger);color:#ffd3d6}
.layout{display:grid;grid-template-columns:320px 1fr;gap:16px;padding:16px;height:calc(100vh - 56px - 30px)}
.panel.left{overflow:auto}.card{background:var(--card);border:1px solid #1f2a35;border-radius:14px;padding:12px;margin-bottom:12px}
.hint{color:var(--muted);font-size:12px}.btnrow{display:flex;gap:8px;flex-wrap:wrap}.row{display:flex;align-items:center;gap:8px;margin:8px 0;flex-wrap:wrap}
.row label{width:180px;color:#cfe0ee;font-size:13px}.row.indent{margin-left:12px}
.panel.stage{position:relative;overflow:hidden}.canvasWrap{width:100%;height:100%;background:#0a0e12;border:1px solid #10161a;border-radius:14px;position:relative}
#canvas{width:100%;height:100%;display:block;border-radius:14px}
.overlayHelp{position:absolute;inset:0;pointer-events:none;display:flex;align-items:flex-start;justify-content:flex-end;padding:8px}
.overlayHelp .help{background:rgba(0,0,0,.5);border:1px solid #263240;border-radius:10px;padding:10px;max-width:320px}
.foot{height:30px;display:flex;align-items:center;justify-content:center;color:#9bb2c4}