:root {
  --bg: #0b1020;
  --panel: #11162a;
  --panel-2: #0f1430;
  --text: #e9eefb;
  --muted: #a7b0c0;
  --brand: #0ea5e9;
  --brand-2: #22c55e;
  --border: #20263e;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -20%, #0e163a, transparent), var(--bg);
}

.app-header {
  padding: 16px 20px 8px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
}
.app-header h1 {
  margin: 0;
  font-size: 20px;
}
.app-header .subtitle { margin: 6px 0 0; color: var(--muted); }

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 16px;
  padding: 16px;
}

.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}
.group { margin-bottom: 14px; }
.group:last-child { margin-bottom: 0; }
.label { display: block; font-weight: 600; margin-bottom: 8px; }
.row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.checkbox { color: var(--muted); }
.add-row input[type="text"] { flex: 1; }
.hint { color: var(--muted); font-size: 12px; }

input[type="text"], input[type="number"], input[type="color"], input[type="range"], select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}
input[type="range"] { padding: 4px; height: 28px; }
output { color: var(--muted); min-width: 32px; text-align: right; }

.btn {
  background: #1a233f;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}
.btn:hover { border-color: #2a3357; }
.btn.primary { background: var(--brand); color: #051320; border-color: transparent; }
.btn.danger { background: #ef4444; border-color: transparent; }
.btn.icon { padding: 6px 8px; }

.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.layers { display: grid; gap: 8px; }
.layer-item {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
}
.layer-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.layer-emoji { font-size: 20px; }
.layer-controls { display: grid; grid-template-columns: auto 1fr auto; gap: 6px 8px; align-items: center; }
.layer-controls label { color: var(--muted); }
.layer-actions { display: flex; gap: 6px; margin-left: auto; }

.snippet { margin-top: 8px; }
.snippet pre { background: #0b1120; border: 1px solid var(--border); padding: 10px; border-radius: 8px; overflow: auto; }

.stage {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: grid;
  gap: 8px;
  align-content: start;
}
#canvas { width: 100%; height: auto; background: #091026; border-radius: 12px; display: block; }
.stage-toolbar { display: flex; gap: 8px; align-items: center; }
.stage-toolbar .note { color: var(--muted); }

.app-footer { color: var(--muted); padding: 12px 16px; border-top: 1px solid var(--border); }

@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
}