:root {
  --bg: #f4efe6;
  --bg-accent: #d8c5a2;
  --panel: rgba(255, 250, 241, 0.88);
  --panel-strong: #fff8ed;
  --text: #1d261c;
  --muted: #5c6652;
  --grid: #d7d0bf;
  --snake: #2d6a4f;
  --snake-head: #1b4332;
  --food: #bc4749;
  --shadow: 0 24px 60px rgba(41, 35, 24, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(
      circle at top left,
      rgba(255, 255, 255, 0.75),
      transparent 30%
    ),
    radial-gradient(
      circle at bottom right,
      rgba(216, 197, 162, 0.65),
      transparent 30%
    ),
    linear-gradient(135deg, var(--bg), #e8dfd0 55%, #d4c2a4);
}

.app-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 28px;
  align-items: center;
  padding: 32px 0;
}

.hero,
.game-panel {
  background: var(--panel);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(29, 38, 28, 0.08);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 40px;
}

.eyebrow,
.label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: var(--muted);
}

h1 {
  margin: 12px 0 16px;
  font-size: clamp(3rem, 8vw, 5.8rem);
  line-height: 0.95;
}

.intro {
  max-width: 28rem;
  font-size: 1.1rem;
  line-height: 1.6;
}

.controls-card {
  margin-top: 36px;
  display: grid;
  gap: 18px;
  padding: 22px;
  background: var(--panel-strong);
  border-radius: 22px;
}

.controls-card p {
  margin: 6px 0 0;
}

kbd {
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid rgba(29, 38, 28, 0.14);
  background: white;
  font: inherit;
  font-size: 0.95rem;
}

.game-panel {
  padding: 24px;
}

.hud {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: 14px;
  align-items: end;
  margin-bottom: 18px;
}

.stat {
  padding: 16px 18px;
  border-radius: 18px;
  background: var(--panel-strong);
}

.stat strong {
  display: block;
  margin-top: 6px;
  font-size: 1.8rem;
}

.restart-button {
  border: 0;
  border-radius: 18px;
  background: var(--snake-head);
  color: white;
  font: inherit;
  font-weight: 700;
  padding: 14px 18px;
  cursor: pointer;
  transition:
    transform 120ms ease,
    opacity 120ms ease;
}

.restart-button:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

.board-wrap {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px), #f9f3e8;
  background-size: 24px 24px;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
  background: rgba(29, 38, 28, 0.3);
  color: white;
}

.overlay.hidden {
  display: none;
}

.overlay h2 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 5vw, 3rem);
}

.overlay p {
  margin: 0;
  max-width: 20rem;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 20px 0 32px;
  }

  .hero,
  .game-panel {
    padding: 22px;
  }

  .hud {
    grid-template-columns: 1fr 1fr;
  }

  .restart-button {
    grid-column: 1 / -1;
  }
}