:root {
  color-scheme: dark;
  --bg: #101912;
  --panel: rgba(16, 27, 19, 0.85);
  --panel-border: rgba(181, 255, 126, 0.18);
  --grid: #162619;
  --grid-highlight: #1c3120;
  --snake: #9cff57;
  --snake-head: #e7ff87;
  --food: #ff6f61;
  --text: #f6ffe8;
  --muted: #a7bb9a;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at top, rgba(156, 255, 87, 0.14), transparent 28%),
    linear-gradient(160deg, #0b140d 0%, #101912 45%, #060a07 100%);
  color: var(--text);
}

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

.game-shell {
  width: min(100%, 760px);
  padding: 28px;
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hud {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 0.95;
}

.stats {
  display: flex;
  gap: 12px;
}

.stat-card {
  min-width: 108px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-label {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 6px;
}

.stat-card strong {
  font-size: 1.6rem;
}

.board-wrap {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background:
    linear-gradient(90deg, transparent 49%, rgba(255, 255, 255, 0.03) 50%, transparent 51%),
    linear-gradient(transparent 49%, rgba(255, 255, 255, 0.03) 50%, transparent 51%),
    linear-gradient(180deg, var(--grid-highlight), var(--grid));
  background-size: 24px 24px, 24px 24px, 100% 100%;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  gap: 16px;
  padding: 24px;
  text-align: center;
  background: linear-gradient(rgba(6, 10, 7, 0.15), rgba(6, 10, 7, 0.78));
}

.overlay.hidden {
  display: none;
}

#status-text {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 500;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease;
}

button:hover {
  transform: translateY(-1px);
}

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

#start-button {
  background: linear-gradient(135deg, #b7ff6a, #75db34);
  color: #10200f;
}

#pause-button {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.controls {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.controls p {
  margin: 0;
}

@media (max-width: 640px) {
  .page {
    padding: 14px;
  }

  .game-shell {
    padding: 18px;
    border-radius: 20px;
  }

  .hud {
    flex-direction: column;
    align-items: start;
  }

  .stats {
    width: 100%;
  }

  .stat-card {
    flex: 1;
  }
}