:root {
  --bg: #f5f5f5;
  --panel: #ffffff;
  --text: #222222;
  --border: #d8d8d8;
  --snake: #2e7d32;
  --food: #d32f2f;
  --cell: #fafafa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 20px;
  background: var(--bg);
  color: var(--text);
  font-family: sans-serif;
}

.app {
  max-width: 520px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar h1 {
  margin: 0;
  font-size: 1.4rem;
}

.status {
  display: flex;
  gap: 12px;
  font-size: 0.95rem;
}

.board {
  margin-top: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  display: grid;
  gap: 1px;
  width: min(90vw, 480px);
  height: min(90vw, 480px);
}

.cell {
  background: var(--cell);
}

.cell.snake {
  background: var(--snake);
}

.cell.food {
  background: var(--food);
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

button {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 8px 12px;
  cursor: pointer;
}

.controls {
  margin-top: 10px;
}

.controls-row {
  margin-top: 6px;
  display: flex;
  gap: 8px;
}

.hint {
  margin-top: 10px;
  font-size: 0.9rem;
}