* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #3fb04a;
  font-family: 'Press Start 2P', 'Courier New', monospace;
  color: #fff;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none; /* swipes drive the car instead of scrolling/zooming */
  overscroll-behavior: none;
}

/* show touch hints on touch-first devices, keyboard hints elsewhere */
.touch-only {
  display: none !important;
}

@media (hover: none) and (pointer: coarse) {
  .controls.touch-only {
    display: flex !important;
  }

  span.touch-only {
    display: inline !important;
  }

  .keys-only {
    display: none !important;
  }
}

#pause-btn {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 52px;
  height: 52px;
  font-family: inherit;
  font-size: 16px;
  color: #fff;
  text-shadow: 3px 3px 0 #000;
  background: rgba(0, 0, 0, 0.35);
  border: 4px solid #000;
  pointer-events: auto;
  cursor: pointer;
}

#pause-btn:active {
  background: rgba(255, 255, 255, 0.25);
}

#game canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.hidden {
  display: none !important;
}

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  text-shadow: 3px 3px 0 #000;
}

.hud-box {
  position: absolute;
  top: 16px;
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.35);
  border: 4px solid #000;
}

.hud-left {
  left: 16px;
}

.hud-right {
  right: 16px;
  text-align: right;
}

.label {
  font-size: 10px;
  color: #ffd23f;
  margin-bottom: 8px;
}

#score,
#best {
  font-size: 24px;
}

.hud-bottom {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 28px;
  font-size: 12px;
  padding: 10px 16px;
  background: rgba(0, 0, 0, 0.35);
  border: 4px solid #000;
  white-space: nowrap;
}

/* ---------- Overlays ---------- */
.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  text-align: center;
  background: rgba(10, 20, 40, 0.45);
  text-shadow: 4px 4px 0 #000;
  cursor: pointer;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 6vw, 64px);
  line-height: 1.3;
  color: #fff;
}

h1 .accent {
  color: #ff4757;
}

h2 {
  margin: 0;
  font-size: clamp(24px, 5vw, 48px);
  color: #ff4757;
}

.overlay p {
  margin: 0;
  font-size: 16px;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 12px;
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.4);
  border: 4px solid #000;
  line-height: 1.4;
}

.best-line,
#new-best {
  font-size: 14px;
  color: #ffd23f;
}

#new-best {
  font-size: 18px;
  animation: blink 0.5s steps(1) infinite;
}

.blink {
  color: #7bed9f;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ---------- Small / phone screens ---------- */
@media (max-width: 600px) {
  .hud-box {
    top: calc(10px + env(safe-area-inset-top));
    padding: 8px 10px;
  }

  .hud-left {
    left: 10px;
  }

  .hud-right {
    right: 10px;
  }

  #pause-btn {
    top: calc(10px + env(safe-area-inset-top));
    width: 44px;
    height: 44px;
    font-size: 12px;
  }

  #score,
  #best {
    font-size: 16px;
  }

  .label {
    font-size: 8px;
  }

  .hud-bottom {
    bottom: calc(10px + env(safe-area-inset-bottom));
    gap: 14px;
    font-size: 9px;
    padding: 8px 10px;
  }

  .overlay p {
    font-size: 12px;
  }

  .controls {
    font-size: 9px;
    padding: 12px 14px;
  }
}