:root {
  color-scheme: dark;
  --bg: #101418;
  --panel: #182027;
  --panel-strong: #202a32;
  --text: #f6f1e8;
  --muted: #9fb0ba;
  --accent: #ffcf5a;
  --snake: #45d483;
  --snake-head: #b8f76a;
  --food: #ff5c73;
  --grid: rgba(255, 255, 255, 0.055);
  --shadow: rgba(0, 0, 0, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top left, rgba(69, 212, 131, 0.14), transparent 34rem),
    linear-gradient(135deg, #101418 0%, #16212a 52%, #251d2a 100%);
  color: var(--text);
}

button {
  border: 0;
  border-radius: 8px;
  padding: 0.8rem 1.1rem;
  background: var(--accent);
  color: #18130a;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 20px var(--shadow);
}

button:hover {
  filter: brightness(1.06);
}

button:active {
  transform: translateY(1px);
}

.game-shell {
  width: min(92vw, 560px);
  display: grid;
  gap: 1rem;
}

.scoreboard,
.controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.scoreboard > div,
.controls button {
  min-height: 4.5rem;
}

.scoreboard > div {
  display: grid;
  align-content: center;
  gap: 0.2rem;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(24, 32, 39, 0.86);
  box-shadow: 0 12px 28px var(--shadow);
}

.label {
  color: var(--muted);
  font-size: 0.78rem;
}

.scoreboard strong {
  font-size: clamp(1.35rem, 5vw, 2rem);
}

.board-wrap {
  position: relative;
  aspect-ratio: 1;
  border-radius: 8px;
  padding: 10px;
  background: linear-gradient(145deg, var(--panel), var(--panel-strong));
  box-shadow: 0 24px 50px var(--shadow);
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 6px;
  background: #0e1519;
}

.overlay {
  position: absolute;
  inset: 10px;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.65rem;
  border-radius: 6px;
  background: rgba(14, 21, 25, 0.78);
  text-align: center;
}

.overlay.is-hidden {
  display: none;
}

.overlay h1 {
  margin: 0;
  font-size: clamp(2.2rem, 10vw, 4.2rem);
}

.overlay p {
  margin: 0 0 0.4rem;
  color: var(--muted);
}

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

.controls button {
  background: #25323b;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 430px) {
  .game-shell {
    width: min(94vw, 560px);
  }

  .scoreboard {
    gap: 0.5rem;
  }

  .scoreboard > div {
    min-height: 4rem;
    padding: 0.65rem;
  }

  button {
    padding-inline: 0.7rem;
  }
}