:root {
  --bg: #0c1118;
  --panel: #151c26;
  --border: #2a3648;
  --text: #cfd8e3;
  --muted: #8b97a6;
  --accent: #4da3ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

h1 { font-size: 16px; margin: 0 8px 0 0; letter-spacing: 0.5px; }

.controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.controls label { display: flex; gap: 6px; align-items: center; color: var(--muted); font-size: 12px; }

button, select {
  background: #1d2735;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
input[type="range"] { width: 90px; accent-color: var(--accent); }

main { display: flex; gap: 12px; padding: 12px; flex: 1; min-height: 0; }

#palette { display: flex; flex-direction: column; gap: 8px; width: 180px; flex-shrink: 0; overflow-y: auto; }
.group h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  margin: 4px 0;
}
.chips { display: flex; flex-wrap: wrap; gap: 5px; }
.chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
}
.chip.sel { outline: 2px solid var(--accent); outline-offset: -1px; }
.sw { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

.stage { flex: 1; display: flex; justify-content: center; align-items: flex-start; min-width: 0; }
canvas {
  image-rendering: pixelated;
  width: 100%;
  max-width: 1100px;
  aspect-ratio: 8 / 5;
  border: 1px solid var(--border);
  border-radius: 4px;
  touch-action: none;
  cursor: crosshair;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 6px 14px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
  background: var(--panel);
}