:root {
  --bg: #0b0e11;
  --panel: #101418;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3ddc84;
  --border: #263039;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.app {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

button {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.status {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.workspace {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  max-width: 100%;
}

#board {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-width: 100%;
  height: auto;
}

#palette {
  flex: 0 0 auto;
  min-width: 150px;
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

#palette h2 {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}

.pattern-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pattern-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: grab;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.pattern-item:hover {
  border-color: var(--accent);
  background: #151b21;
}

.pattern-name {
  font-size: 12px;
  color: var(--text);
}

.pattern-icon {
  display: block;
  border: 1px solid var(--border);
  border-radius: 3px;
  image-rendering: pixelated;
}

.pattern-item.is-disabled {
  opacity: 0.4;
  cursor: not-allowed;
  border-color: var(--border);
  background: var(--bg);
}