:root {
  --bg: #111;
  --panel: #0f1720;
  --accent: #22c55e;
  --snake: #60a5fa;
  --food: #f97316;
  --muted: #94a3b8;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  background: linear-gradient(180deg, #071022 0%, #061122 100%);
  font-family: Inter, system-ui, Arial, sans-serif;
  color: #e6eef6;
}

.wrap {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  background: rgba(255, 255, 255, 0.03);
  padding: 18px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(2, 6, 23, 0.6);
  width: 420px;
  max-width: 100%; /* Ensures the card does not overflow on small screens */
}

h1 {
  font-size: 18px;
  margin: 0 0 8px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.score {
  font-size: 14px;
  color: var(--accent);
}

canvas {
  background: linear-gradient(180deg, #022 0%, #012 100%);
  display: block;
  border-radius: 8px;
  width: 100%;
  height: auto;
  max-height: 350px; /* Prevent canvas from growing too large */
}

.controls {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

button {
  flex: 1;
  padding: 8px 10px;
  border-radius: 8px;
  border: 0;
  background: #0b1220;
  color: #dbeafe;
  font-weight: 600;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.mobile-pad {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.pad-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pad-btn {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  border: 0;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.6));
  border-radius: 8px;
}

.overlay .box {
  background: var(--panel);
  padding: 18px;
  border-radius: 10px;
  text-align: center;
}

.small {
  font-size: 12px;
  color: var(--muted);
}

@media (max-width: 480px) {
  .card {
    width: 100%;
  }

  .controls {
    flex-direction: column; /* Stack controls vertically on smaller screens */
  }

  .mobile-pad {
    gap: 4px; /* Adjust space between pad buttons on small screens */
  }

  .pad-btn {
    width: 48px;
    height: 48px; /* Adjust button size for mobile */
  }
}