:root {
  --bg-deep: #01030a;
  --bg-mid: #0a1e2e;
  --bg-low: #04222a;
  --neon-cyan: #7cf6ff;
  --neon-magenta: #ff3eb5;
  --neon-amber: #ffb265;
  --text: #e6f6ff;
  --text-dim: #6a8a98;
  --card-bg: rgba(4, 18, 28, 0.92);
  --card-border: #1a3a4a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
  color: var(--text);
  font-family: 'Press Start 2P', system-ui, monospace;
  overflow: hidden;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#stage {
  position: relative;
  width: 100dvw;
  height: 100dvh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse at center, #050a14 0%, #000 75%);
  touch-action: none;            /* prevent double-tap-zoom & swipe scroll */
  cursor: pointer;
}

#game {
  display: block;
  aspect-ratio: 3 / 5;
  height: 100dvh;
  max-width: 100dvw;
  width: auto;
  background: var(--bg-deep);
  touch-action: none;
}

#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  padding: 12px 14px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-rows: auto 1fr;
  font-size: 10px;
  letter-spacing: 1px;
}

#depth {
  grid-column: 1; grid-row: 1;
  justify-self: start;
  color: var(--neon-amber);
  text-shadow: 0 0 6px var(--neon-amber);
}

#score-wrap {
  grid-column: 2; grid-row: 1;
  text-align: center;
}

#score {
  font-size: 16px;
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan);
}

#best {
  margin-top: 6px;
  color: var(--neon-amber);
  text-shadow: 0 0 4px var(--neon-amber);
}

#mute {
  grid-column: 3; grid-row: 1;
  justify-self: end;
  pointer-events: auto;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--neon-cyan);
  width: 32px; height: 32px;
  display: grid; place-items: center;
  cursor: pointer;
  border-radius: 4px;
}

#mute.muted { color: var(--text-dim); }

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: auto;
  z-index: 10;
}

.overlay.hidden { display: none; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: 0 0 24px rgba(124, 246, 255, 0.15), inset 0 0 24px rgba(0,0,0,0.6);
  padding: 24px 28px;
  text-align: center;
  max-width: 360px;
  width: 88%;
  border-radius: 6px;
}

.card h1 {
  margin: 0 0 12px;
  font-size: 18px;
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan);
  animation: flicker 4s infinite;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 22px;
  color: var(--neon-magenta);
  text-shadow: 0 0 10px var(--neon-magenta);
}

.card p {
  font-size: 10px;
  color: var(--text-dim);
  margin: 8px 0;
}

.final-score {
  font-size: 14px;
  margin: 12px 0;
  color: var(--neon-cyan);
  text-shadow: 0 0 6px var(--neon-cyan);
}

.new-record {
  color: var(--neon-amber);
  font-size: 11px;
  margin: 6px 0 12px;
  text-shadow: 0 0 8px var(--neon-amber);
  animation: flicker 1.2s infinite;
}

.new-record.hidden { display: none; }

#submit-form {
  display: flex;
  gap: 6px;
  margin: 12px 0;
}

#name-input {
  flex: 1;
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--card-border);
  color: var(--neon-cyan);
  font-family: inherit;
  font-size: 11px;
  padding: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: center;
}

#submit-form button, #restart {
  background: transparent;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: inherit;
  font-size: 10px;
  padding: 8px 12px;
  cursor: pointer;
  letter-spacing: 1px;
  text-shadow: 0 0 4px var(--neon-cyan);
}

#submit-form button:hover, #restart:hover {
  background: rgba(124, 246, 255, 0.1);
}

#submit-status {
  font-size: 9px;
  color: var(--text-dim);
  min-height: 12px;
}

#leaderboard {
  list-style: none;
  padding: 0;
  margin: 12px 0;
  font-size: 9px;
  text-align: left;
  max-height: 180px;
  overflow-y: auto;
}

#leaderboard li {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  gap: 8px;
  padding: 3px 6px;
  border-bottom: 1px dashed rgba(124,246,255,0.1);
}

#leaderboard li.mine {
  color: var(--neon-amber);
  text-shadow: 0 0 4px var(--neon-amber);
  background: rgba(255, 178, 101, 0.06);
}

#leaderboard .rank { color: var(--text-dim); }
#leaderboard .score { color: var(--neon-cyan); }

#restart {
  margin-top: 8px;
}

#scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(0,0,0,0.06) 3px,
    rgba(0,0,0,0) 4px
  );
  z-index: 20;
  mix-blend-mode: multiply;
}

#cracks {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1s ease-in;
  z-index: 15;
}

#cracks svg { width: 100%; height: 100%; }

#cracks.pressed {
  opacity: 1;
  animation: pressure-crack-twitch 800ms infinite;
}

@keyframes pressure-crack-twitch {
  0%, 90%, 100% { transform: translate(0,0) rotate(0); }
  93% { transform: translate(0.5px, -0.5px) rotate(0.2deg); }
  96% { transform: translate(-0.5px, 0.3px) rotate(-0.15deg); }
}

@keyframes flicker {
  0%, 92%, 100% { opacity: 1; }
  93% { opacity: 0.4; }
  95% { opacity: 1; }
  97% { opacity: 0.6; }
}

#credit {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-size: 8px;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 1px;
  z-index: 25;
}

#credit:hover { color: var(--neon-cyan); }