* { box-sizing: border-box; }

:root {
  --bg: #06070d;
  --panel: #0d1020;
  --grid: #141830;
  --snake: #4dffb8;
  --snake-dark: #17c98a;
  --food: #ff5ec4;
  --accent: #4dffb8;
  --text: #eaf6ff;
  --muted: #7c88b8;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: radial-gradient(circle at 50% 0%, #131735 0%, #06070d 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

#wrap {
  max-width: 460px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 20px 16px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#hud {
  width: 100%;
}

h1 {
  text-align: center;
  margin: 4px 0 14px;
  font-size: 1.8rem;
  letter-spacing: 0.03em;
  color: var(--snake);
  text-shadow: 0 0 12px rgba(77, 255, 184, 0.6);
}

#scoreRow {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
}

.scoreBox {
  background: var(--panel);
  border: 1px solid rgba(77, 255, 184, 0.25);
  border-radius: 12px;
  padding: 8px 18px;
  min-width: 90px;
  text-align: center;
}

.scoreLabel {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.scoreBox span#score,
.scoreBox span#best {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
}

#stageWrap {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
}

#stage {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  background: var(--panel);
  box-shadow: 0 0 0 1px rgba(77, 255, 184, 0.2), 0 10px 40px rgba(0, 0, 0, 0.6);
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 7, 13, 0.88);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 20px;
}

.overlay.hidden { display: none; }

.overlay h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--snake);
  text-shadow: 0 0 10px rgba(77, 255, 184, 0.6);
}

.overlay p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.overlay button {
  border: none;
  background: linear-gradient(180deg, var(--snake), var(--snake-dark));
  color: #04140d;
  font-weight: 800;
  font-size: 1rem;
  padding: 12px 28px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(77, 255, 184, 0.5);
}
.overlay button:active { transform: scale(0.96); }

#touchControls {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
#tMidRow { display: flex; gap: 6px; align-items: center; }

.tBtn {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  border: 1px solid rgba(77, 255, 184, 0.3);
  background: var(--panel);
  color: var(--snake);
  font-size: 1.3rem;
  cursor: pointer;
}
.tBtn.small { width: 44px; height: 44px; font-size: 1rem; color: var(--muted); }
.tBtn:active { background: rgba(77, 255, 184, 0.15); }

#hint {
  margin-top: 16px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (hover: hover) and (pointer: fine) {
  #touchControls { display: none; }
}