:root {
  --bg: #0f1419;
  --panel: #1b232e;
  --panel-2: #232d3a;
  --accent: #4a90d9;
  --accent-2: #2ecc71;
  --text: #e6e6e6;
  --muted: #8a94a6;
  --danger: #e74c3c;
  --radius: 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
#app { display: grid; grid-template-columns: 360px 1fr; height: 100vh; }

/* Sidebar */
#sidebar {
  background: var(--panel);
  border-right: 1px solid #2a3340;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
#sidebar header h1 { margin: 0; font-size: 20px; }
.subtitle { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.panel {
  background: var(--panel-2);
  border-radius: var(--radius);
  padding: 12px;
  border: 1px solid #2c3744;
}
.panel h2 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
label { display: flex; flex-direction: column; font-size: 12px; color: var(--muted); gap: 4px; }
label.row { flex-direction: row; align-items: center; justify-content: space-between; gap: 8px; color: var(--text); }
label.toggle { cursor: pointer; }
.dim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
input[type="number"], input[type="text"], select {
  background: #18202b; border: 1px solid #34404f; color: var(--text);
  border-radius: 5px; padding: 6px 8px; font-size: 13px; width: 100%;
}
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }

button { cursor: pointer; border: none; border-radius: 6px; padding: 10px 14px; font-size: 14px; font-weight: 600; }
button.primary { background: var(--accent); color: #fff; }
button.primary:hover { background: #5ba0e9; }
button.ghost { background: transparent; border: 1px dashed #3a4757; color: var(--muted); width: 100%; }
button.ghost:hover { color: var(--text); border-color: var(--accent); }
button.danger { background: transparent; color: var(--danger); border: 1px solid #4a2c2c; padding: 4px 8px; font-size: 12px; }

/* Cargo rows */
.cargo-row {
  background: #18202b; border: 1px solid #2c3744; border-radius: 6px;
  padding: 10px; margin-bottom: 8px; display: flex; flex-direction: column; gap: 8px;
}
.cargo-row .top { display: flex; gap: 6px; align-items: center; }
.cargo-row .top input { flex: 1; }
.cargo-row .grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
.cargo-row .grid input { padding: 5px 6px; }
.cargo-row .opts { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--muted); }
.color-pick { width: 36px; height: 28px; padding: 2px; background: none; border-radius: 5px; }

.status { font-size: 12px; min-height: 18px; color: var(--muted); }
.status.error { color: var(--danger); }
.status.busy { color: var(--accent); }

/* Viewer */
#viewer { position: relative; display: flex; flex-direction: column; }
#three-container { flex: 1; position: relative; overflow: hidden; }
#three-container canvas { display: block; }
#container-tabs { display: flex; gap: 4px; padding: 8px; background: var(--panel); border-bottom: 1px solid #2a3340; flex-wrap: wrap; }
.tab { padding: 6px 14px; border-radius: 6px; background: var(--panel-2); font-size: 12px; cursor: pointer; border: 1px solid #2c3744; }
.tab.active { background: var(--accent); color: #fff; }

.tooltip {
  position: absolute; pointer-events: none; background: rgba(20,28,38,.96);
  border: 1px solid #3a4757; border-radius: 6px; padding: 8px 10px; font-size: 12px;
  z-index: 10; max-width: 240px; line-height: 1.5; box-shadow: 0 6px 20px rgba(0,0,0,.5);
}
.tooltip.hidden { display: none; }
.tooltip b { color: var(--accent); }

#legend { position: absolute; bottom: 12px; left: 12px; background: rgba(20,28,38,.8); padding: 8px 10px; border-radius: 6px; font-size: 11px; color: var(--muted); border: 1px solid #2c3744; }

/* Summary */
#summary {
  position: absolute; top: 50px; right: 16px; width: 300px; background: var(--panel);
  border: 1px solid #2a3340; border-radius: var(--radius); padding: 14px; z-index: 20;
  box-shadow: 0 8px 30px rgba(0,0,0,.5);
}
#summary.hidden { display: none; }
.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric { background: var(--panel-2); border-radius: 6px; padding: 10px; }
.metric .v { font-size: 20px; font-weight: 700; color: var(--accent); }
.metric .l { font-size: 11px; color: var(--muted); text-transform: uppercase; }
.metric .v.green { color: var(--accent-2); }
.unused { margin-top: 14px; }
.unused h3 { font-size: 12px; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
.unused ul { list-style: none; padding: 0; margin: 0; max-height: 160px; overflow-y: auto; }
.unused li { font-size: 12px; padding: 4px 0; border-bottom: 1px solid #232d3a; display: flex; justify-content: space-between; }
.unused .none { color: var(--muted); font-style: italic; }
.bar { height: 6px; background: #232d3a; border-radius: 3px; margin-top: 6px; overflow: hidden; }
.bar > div { height: 100%; background: var(--accent); }

@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  #sidebar { max-height: 45vh; }
}