:root {
  --bg: #0b0f1a;
  --panel: #111827;
  --panel-2: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --accent-2: #38bdf8;
  --danger: #ef4444;
  --border: #1f2937;
  --node: #111827;
  --node-border: #334155;
  --node-selected: #22c55e;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 90% -10%, #1f2937 0%, #0b0f1a 55%), var(--bg);
  color: var(--text);
  font-family: "Cairo", "Tajawal", "Noto Kufi Arabic", "Segoe UI", sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 10px;
}

.brand-title { font-size: 1.3rem; font-weight: 700; }
.brand-subtitle { font-size: 0.85rem; color: var(--muted); margin-top: 2px; }

.topbar-actions .btn { margin-inline-start: 8px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 16px;
  margin: 0 16px 12px;
}

.panel-title {
  font-weight: 700;
  margin-bottom: 8px;
}

.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
label { font-size: 0.9rem; color: var(--muted); }
label.check { display: flex; align-items: center; gap: 6px; }

input, select, textarea {
  font-family: inherit;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
}

textarea { resize: vertical; }

.status { color: var(--muted); font-size: 0.85rem; }

.run-sites {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text);
  padding: 6px 8px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--panel-2);
}

.run-sites span {
  color: var(--accent-2);
  word-break: break-word;
}

.layout {
  display: grid;
  grid-template-columns: 240px 1fr 320px;
  gap: 12px;
  padding: 0 16px 16px;
  height: calc(100vh - 140px);
}

.palette {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
}

.palette-title { font-weight: 700; margin-bottom: 4px; }
.palette-subtitle { font-size: 0.8rem; color: var(--muted); margin-bottom: 10px; }

.palette-items { display: grid; gap: 8px; }

.palette-item {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.palette-item:hover { border-color: var(--accent); }

.canvas-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.canvas-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

.canvas {
  position: relative;
  flex: 1;
  overflow: auto;
  background: linear-gradient(180deg, #0b1220, #0b0f1a);
  cursor: grab;
  direction: ltr;
}

.canvas.panning { cursor: grabbing; }
.canvas.pan-ready .node { cursor: grab; }

.canvas-sizer {
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  pointer-events: none;
  z-index: 0;
}

.edges {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  transform-origin: 0 0;
}

.nodes {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  transform-origin: 0 0;
}

.node {
  position: absolute;
  width: 170px;
  background: var(--node);
  border: 1px solid #64748b; /* idle */
  border-radius: 10px;
  padding: 8px;
  cursor: move;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
  user-select: none;
  direction: rtl;
  text-align: right;
}

.node.selected { border-color: var(--node-selected); }

.node.status-running {
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.28), rgba(17, 24, 39, 0.95));
  border-color: #f59e0b;
  box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.6), 0 6px 20px rgba(0,0,0,0.25);
}

.node.status-ok {
  background: linear-gradient(180deg, rgba(34, 197, 94, 0.28), rgba(17, 24, 39, 0.95));
  border-color: #22c55e;
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.5), 0 6px 20px rgba(0,0,0,0.25);
}

.node.status-error {
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.28), rgba(17, 24, 39, 0.95));
  border-color: #ef4444;
  box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.5), 0 6px 20px rgba(0,0,0,0.25);
}

.node.status-stopped {
  background: linear-gradient(180deg, rgba(148, 163, 184, 0.24), rgba(17, 24, 39, 0.95));
  border-color: #94a3b8;
  opacity: 0.9;
}

.node-title { font-weight: 700; font-size: 0.9rem; margin-bottom: 6px; }
.node-type { font-size: 0.75rem; color: var(--muted); }

.port {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.port.in { left: -5px; background: var(--accent-2); }
.port.out { right: -5px; background: var(--accent); }

.inspector {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
}

.inspector-title { font-weight: 700; margin-bottom: 8px; }
.field { margin-bottom: 10px; display: grid; gap: 6px; }
.field-row { display: flex; gap: 8px; }
.divider { height: 1px; background: var(--border); margin: 12px 0; }

.btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
}

.btn.primary { background: var(--accent); color: #04210e; border-color: #16a34a; }
.btn.ghost { background: transparent; border-style: dashed; }
.btn.danger { background: #7f1d1d; border-color: var(--danger); }

.hint { color: var(--muted); font-size: 0.8rem; }

@media (max-width: 1200px) {
  .layout { grid-template-columns: 220px 1fr; grid-template-rows: auto auto; }
  .inspector { grid-column: span 2; height: 320px; }
}

@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .palette, .inspector { order: 2; }
  .canvas-panel { order: 1; height: 420px; }
}