:root {
  --space-0: #04060f;
  --space-1: #0e1a3d;
  --space-2: #1e245f;
  --neon-blue: #78e6ff;
  --neon-gold: #ffdc75;
  --ink: #0a0d1f;
  --text: #eff5ff;
  --ui-panel: rgba(5, 11, 36, 0.78);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Space Mono", monospace;
  background:
    radial-gradient(
      circle at 15% 10%,
      rgba(120, 230, 255, 0.15),
      transparent 26%
    ),
    radial-gradient(
      circle at 85% 16%,
      rgba(255, 220, 117, 0.12),
      transparent 20%
    ),
    linear-gradient(
      170deg,
      var(--space-0) 0%,
      var(--space-1) 45%,
      var(--space-2) 100%
    );
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    radial-gradient(2px 2px at 20% 15%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 35% 75%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 75% 22%, #fff, transparent),
    radial-gradient(2px 2px at 66% 72%, #fff, transparent),
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size:
    auto,
    auto,
    auto,
    auto,
    100% 4px;
}

.game-shell {
  width: min(980px, 94vw);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  align-content: start;
  gap: 0.7rem;
  padding: max(0.9rem, env(safe-area-inset-top)) 0 1.1rem;
}

header {
  text-align: center;
}

.title-row {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
}

.home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 0.55rem;
  border: 1px solid rgba(120, 230, 255, 0.55);
  background: rgba(11, 24, 71, 0.65);
  box-shadow: 0 0 10px rgba(120, 230, 255, 0.28);
  padding: 0.22rem;
  transition:
    transform 0.15s ease,
    box-shadow 0.2s ease;
}

.home-link:hover,
.home-link:focus-visible {
  transform: translateY(-1px) scale(1.03);
  box-shadow: 0 0 15px rgba(120, 230, 255, 0.48);
}

.home-icon {
  display: block;
  width: clamp(24px, 6vw, 34px);
  height: clamp(24px, 6vw, 34px);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

h1 {
  margin: 0;
  font-size: clamp(1.15rem, 4.4vw, 1.95rem);
  line-height: 1.1;
  text-transform: uppercase;
  font-family: "Press Start 2P", monospace;
  color: var(--neon-gold);
  text-shadow: 0 0 12px rgba(255, 220, 117, 0.46);
}

.hint {
  margin: 0.65rem 0 0;
  font-size: 0.82rem;
  opacity: 0.92;
}

#buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

button,
.debug-label {
  height: 2.7rem;
  border-radius: 0.8rem;
  border: 2px solid var(--neon-blue);
  background: linear-gradient(180deg, #172760 0%, #111847 100%);
  color: var(--text);
  font-family: "Space Mono", monospace;
  font-weight: 700;
  font-size: 0.9rem;
}

button {
  width: 100%;
}

.debug-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
}

#status-bar {
  text-align: center;
  padding: 0.35rem 0.5rem;
  border-radius: 0.6rem;
  border: 1px solid rgba(120, 230, 255, 0.45);
  background: var(--ui-panel);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04rem;
}

#canvas-wrap {
  text-align: center;
}

#myCanvas {
  width: 100%;
  max-width: 520px;
  max-height: 74vh;
  border: 2px solid var(--neon-blue);
  border-radius: 0.75rem;
  background: #f6f9ff;
  box-shadow:
    0 0 0 2px rgba(120, 230, 255, 0.22),
    0 10px 30px rgba(2, 6, 20, 0.5);
}

footer {
  text-align: center;
  font-size: 0.74rem;
  opacity: 0.9;
}

@media (min-width: 760px) {
  #buttons {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .game-shell {
    gap: 1rem;
    padding-top: 1.2rem;
  }

  #myCanvas {
    max-height: 65vh;
  }
}