:root {
  color-scheme: light;
  --bg: #f3f4ef;
  --panel: #ffffff;
  --border: #cdd3c1;
  --text: #223021;
  --muted: #61725f;
  --snake: #496a3d;
  --snake-head: #2f4a29;
  --food: #b74b33;
  --cell: #e8ecdf;
  --cell-size: min(5.5vw, 24px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
}

.panel {
  width: min(100%, 540px);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(34, 48, 33, 0.08);
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.label,
.value,
.help {
  margin: 0;
}

.label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.value {
  margin-top: 4px;
  font-size: 1.25rem;
  font-weight: 700;
}

.status-wrap {
  text-align: right;
}

.status {
  font-size: 1rem;
}

.board-shell {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: #f8f9f4;
}

.board {
  display: grid;
  grid-template-columns: repeat(16, var(--cell-size));
  grid-template-rows: repeat(16, var(--cell-size));
  gap: 2px;
  width: max-content;
  margin: 0 auto;
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border-radius: 4px;
  background: var(--cell);
}

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

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

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

.actions,
.controls-row,
.controls {
  display: flex;
}

.actions {
  gap: 12px;
  margin-top: 16px;
}

button {
  appearance: none;
  border: 1px solid var(--border);
  background: #fbfcf8;
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  font: inherit;
  cursor: pointer;
}

button:hover {
  background: #f0f4e8;
}

.controls {
  margin-top: 16px;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.controls-row {
  gap: 10px;
}

.help {
  margin-top: 16px;
  line-height: 1.5;
  color: var(--muted);
}

@media (max-width: 520px) {
  .panel {
    padding: 16px;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .status-wrap {
    text-align: left;
  }
}