@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=VT323&display=swap');

:root {
  --bg: #08102b;
  --bg-glow: #16295f;
  --panel: #1d2c5e;
  --panel-deep: #18244c;
  --panel-edge: #41558e;
  --screen: #26386c;
  --screen-shadow: #1f2c55;
  --grid-line: rgba(221, 230, 255, 0.08);
  --grid-highlight: rgba(255, 255, 255, 0.05);
  --text: #c9d6ff;
  --muted: #90a3dd;
  --snake: #74d63d;
  --snake-head: #9bf55b;
  --food: #ff6686;
  --super-food: #ffd65a;
  --heart-on: #ff4f73;
  --heart-off: #26345f;
  --boost-ring: rgba(255, 217, 92, 0.45);
  --overlay: rgba(7, 12, 32, 0.72);
  --cell-size: clamp(22px, min(3.25vh, 2.35vw), 28px);
  --board-size: calc(var(--cell-size) * 20);
  --shell-width: min(92vw, calc(var(--board-size) + 7rem));
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 16px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  min-height: 100dvh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 1.75rem;
  background:
    radial-gradient(circle at top, rgba(73, 110, 205, 0.26), transparent 28%),
    radial-gradient(circle at bottom left, rgba(63, 215, 194, 0.14), transparent 22%),
    linear-gradient(180deg, #091231 0%, #071025 100%);
  color: var(--text);
  font-family: 'VT323', monospace;
}

.game-shell {
  width: var(--shell-width);
}

.console {
  position: relative;
  padding: 1.15rem;
  border: 3px solid var(--panel-edge);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(75, 98, 163, 0.18), transparent 35%),
    linear-gradient(180deg, #243567 0%, #192754 100%);
  box-shadow:
    inset 0 0 0 5px rgba(116, 142, 212, 0.12),
    0 20px 60px rgba(0, 0, 0, 0.4);
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.hud-card {
  min-height: 100px;
  padding: 0.95rem 1.1rem;
  border: 2px solid rgba(141, 165, 233, 0.18);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(61, 82, 143, 0.55), rgba(37, 53, 99, 0.82));
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.45rem;
}

.hud-card--center {
  align-items: center;
}

.hud-card--lives {
  align-items: flex-end;
}

.hud-label,
.board-badge__label,
.controls-hint {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hud-value,
.board-badge__value {
  font-size: clamp(2rem, 3vw, 2.9rem);
  color: var(--text);
  letter-spacing: 0.08em;
}

.lives-display {
  display: flex;
  gap: 0.5rem;
}

.heart {
  font-size: 2rem;
  line-height: 1;
  color: var(--heart-off);
  text-shadow: 0 0 0 transparent;
  transition: transform 160ms ease, color 160ms ease, text-shadow 160ms ease;
}

.heart.is-active {
  color: var(--heart-on);
  text-shadow: 0 0 16px rgba(255, 79, 115, 0.55);
}

.board-shell {
  border: 2px solid rgba(141, 165, 233, 0.18);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(50, 70, 124, 0.72), rgba(31, 44, 84, 0.95));
  overflow: hidden;
}

.board-bar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-bottom: 2px solid rgba(141, 165, 233, 0.14);
  background: rgba(17, 26, 57, 0.2);
}

.board-badge {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.board-badge--best {
  justify-content: flex-end;
}

.board-frame {
  position: relative;
  padding: 1rem;
}

.game-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(20, var(--cell-size));
  grid-template-rows: repeat(20, var(--cell-size));
  width: var(--board-size);
  height: var(--board-size);
  margin: 0 auto;
  border: 3px solid rgba(123, 142, 206, 0.34);
  border-radius: 14px;
  overflow: hidden;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(135deg, rgba(255, 255, 255, 0.06), transparent 55%),
    linear-gradient(180deg, #314575 0%, #2a3b6a 100%);
  background-size:
    var(--cell-size) var(--cell-size),
    var(--cell-size) var(--cell-size),
    100% 100%,
    100% 100%;
  box-shadow:
    inset 0 0 0 4px rgba(255, 255, 255, 0.05),
    inset 0 -18px 32px rgba(0, 0, 0, 0.15);
}

.game-board.is-boosted {
  box-shadow:
    inset 0 0 0 4px rgba(255, 255, 255, 0.05),
    inset 0 -18px 32px rgba(0, 0, 0, 0.15),
    0 0 30px var(--boost-ring);
}

.entity {
  margin: 2px;
  border-radius: 6px;
}

.snake-segment {
  background: linear-gradient(180deg, #86ea45 0%, var(--snake) 100%);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.15);
}

.snake-head {
  position: relative;
  background:
    radial-gradient(circle at 62% 38%, #17233f 0 2px, transparent 2.2px),
    radial-gradient(circle at 62% 62%, #17233f 0 2px, transparent 2.2px),
    linear-gradient(180deg, #b4ff73 0%, var(--snake-head) 100%);
  box-shadow:
    inset 0 -2px 0 rgba(0, 0, 0, 0.2),
    0 0 14px rgba(155, 245, 91, 0.18);
}

.snake-segment.is-boosted,
.snake-head.is-boosted {
  outline: 2px solid rgba(255, 235, 152, 0.45);
  box-shadow:
    inset 0 -2px 0 rgba(0, 0, 0, 0.2),
    0 0 18px rgba(255, 235, 152, 0.26);
}

.food {
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.35), transparent 35%),
    linear-gradient(180deg, #ff88a0 0%, var(--food) 100%);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.15);
}

.food-super {
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.35), transparent 35%),
    linear-gradient(180deg, #ffe68e 0%, var(--super-food) 100%);
  box-shadow:
    inset 0 -2px 0 rgba(0, 0, 0, 0.15),
    0 0 20px rgba(255, 214, 90, 0.4);
  animation: superPulse 750ms steps(2) infinite;
}

.overlay {
  position: absolute;
  inset: 0.85rem;
  display: grid;
  place-content: center;
  gap: 0.75rem;
  padding: 1.5rem;
  text-align: center;
  background: var(--overlay);
  border-radius: 16px;
  backdrop-filter: blur(4px);
}

.overlay[hidden] {
  display: none;
}

.overlay-kicker {
  margin: 0;
  font-family: 'Press Start 2P', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: #a6bcff;
  text-transform: uppercase;
}

.overlay-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  letter-spacing: 0.06em;
}

.overlay-text,
.status-text {
  margin: 0;
  font-size: clamp(1.1rem, 1.8vw, 1.5rem);
  color: var(--text);
}

.status-panel {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1rem 0.45rem;
}

.controls-hint {
  margin: 0;
}

@keyframes superPulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(0.86);
  }
}

@media (min-width: 1200px) and (min-height: 820px) {
  :root {
    --cell-size: 28px;
  }
}

@media (max-width: 740px) {
  body {
    padding: 1rem;
  }

  .console {
    padding: 0.85rem;
  }

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

  .hud-card,
  .hud-card--center,
  .hud-card--lives {
    align-items: flex-start;
  }

  .board-bar {
    flex-direction: column;
  }

  .board-badge--best {
    justify-content: flex-start;
  }

  .overlay {
    padding: 1rem;
  }
}