* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  background: #f4f4f4;
  color: #222;
}

.app {
  max-width: 520px;
  margin: 24px auto;
  padding: 12px;
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.hud h1 {
  margin: 0;
  font-size: 1.25rem;
}

.status {
  display: flex;
  gap: 16px;
  font-size: 0.95rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(20, 1fr);
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid #bbb;
  background: #fff;
}

.cell {
  border: 1px solid #f0f0f0;
}

.cell.snake {
  background: #2f9e44;
}

.cell.food {
  background: #d6336c;
}

.controls-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

button {
  padding: 8px 10px;
  border: 1px solid #888;
  background: #fff;
  cursor: pointer;
}

.touch-controls {
  margin-top: 10px;
  display: none;
}

.touch-middle {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

@media (max-width: 900px) {
  .touch-controls {
    display: block;
  }
}