:root{
  --bg:#0d1117; --panel:#161b22; --line:#30363d; --fg:#e6edf3; --muted:#8b949e;
  --accent:#2f81f7; --ok:#3fb950; --err:#f85149; --work:#d29922;
}
*{box-sizing:border-box}
body{margin:0;font:14px/1.4 system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--fg);height:100vh;display:flex;flex-direction:column;overflow:hidden}
header{display:flex;gap:8px;align-items:center;padding:8px 12px;background:var(--panel);border-bottom:1px solid var(--line);flex:none}
.brand{font-weight:600;letter-spacing:.02em}
.spacer{flex:1}
header select,header input,header button{background:#0d1117;color:var(--fg);border:1px solid var(--line);border-radius:6px;padding:6px 10px;font:inherit}
header input{min-width:260px}
button{cursor:pointer}
button:hover{border-color:var(--accent)}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
.status{color:var(--muted);font-size:12px;min-width:120px}

#canvasWrap{position:relative;flex:1;overflow:auto;background-image:radial-gradient(circle,#21262d 1px,transparent 1px);background-size:22px 22px}
#wires{position:absolute;inset:0;width:4000px;height:3000px;pointer-events:none;z-index:1}
#canvas{position:relative;width:4000px;height:3000px;z-index:2}

.node{position:absolute;width:210px;background:var(--panel);border:1px solid var(--line);border-radius:10px;
  box-shadow:0 2px 10px rgba(0,0,0,.4);user-select:none}
.node.sel{border-color:var(--accent);box-shadow:0 0 0 2px rgba(47,129,247,.35)}
.node .hd{padding:8px 10px;font-weight:600;border-bottom:1px solid var(--line);cursor:grab;display:flex;align-items:center;gap:7px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.node .bd{padding:7px 10px;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dot{width:9px;height:9px;border-radius:50%;background:var(--muted);flex:none}
.dot.idle{background:var(--muted)} .dot.working{background:var(--work);animation:pulse 1s infinite}
.dot.ok{background:var(--ok)} .dot.error{background:var(--err)}
@keyframes pulse{50%{opacity:.35}}

.port{position:absolute;width:15px;height:15px;border-radius:50%;background:#0d1117;border:2px solid var(--muted);top:50%;
  transform:translateY(-50%);cursor:crosshair;z-index:3}
.port:hover{border-color:var(--accent);background:var(--accent)}
.port.in{left:-9px} .port.out{right:-9px}
path.wire{stroke:#6e7681;stroke-width:2.4;fill:none}
path.wire:hover{stroke:var(--accent)}
path.wire.hit{stroke:transparent;stroke-width:16;pointer-events:stroke;cursor:pointer}
path.temp{stroke:var(--accent);stroke-dasharray:5 4}

#inspector{position:fixed;right:0;top:0;bottom:0;width:400px;background:var(--panel);border-left:1px solid var(--line);
  padding:14px;overflow:auto;z-index:10;box-shadow:-6px 0 24px rgba(0,0,0,.4)}
#inspector.hidden{display:none}
.inspector-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.inspector-head button{background:none;border:none;color:var(--muted);font-size:16px}
label{display:block;margin:10px 0 4px;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
input[type=text],select,textarea{width:100%;background:#0d1117;color:var(--fg);border:1px solid var(--line);
  border-radius:6px;padding:7px 9px;font:inherit}
textarea{min-height:110px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}
.row{display:flex;gap:8px} .row>*{flex:1}
.actions{margin-top:16px;display:flex;gap:8px}
.hint{font-size:11px;color:var(--muted);margin-top:6px;line-height:1.5}
code{background:#0d1117;padding:1px 5px;border-radius:4px;font-size:11px}
.out{white-space:pre-wrap;background:#0d1117;border:1px solid var(--line);border-radius:6px;padding:9px;
  max-height:220px;overflow:auto;font-family:ui-monospace,monospace;font-size:12px}
#toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:var(--panel);
  border:1px solid var(--line);border-radius:8px;padding:9px 16px;opacity:0;transition:opacity .25s;z-index:50}
#toast.show{opacity:1}