:root {
  --bg: #07070d;
  --bg-2: #0c0c16;
  --panel: rgba(20, 20, 34, 0.6);
  --primary: #00ffc8;
  --primary-dim: #00ffc866;
  --accent: #7b5bff;
  --accent-2: #ff2fd6;
  --bonus: #ffd700;
  --danger: #ff3b6b;
  --text: #e8e8f2;
  --text-dim: #8a8aa0;
  --grid: #151525;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  font-family: 'Rajdhani', sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  z-index: 0;
}

.bg-glow {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(600px 400px at 30% 20%, var(--primary-dim), transparent 60%),
    radial-gradient(600px 400px at 70% 80%, var(--accent)44, transparent 60%);
  filter: blur(40px);
  z-index: 0;
  pointer-events: none;
}

.game {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 640px;
  padding: 24px;
}

/* Header */
.header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 26px;
  letter-spacing: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 18px var(--primary-dim));
}

.logo span {
  animation: blink 1s steps(1) infinite;
}

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

.hud {
  display: flex;
  gap: 12px;
}

.stat {
  background: var(--panel);
  border: 1px solid #ffffff10;
  border-radius: 14px;
  padding: 8px 16px;
  min-width: 76px;
  text-align: center;
  backdrop-filter: blur(8px);
}

.stat-label {
  display: block;
  font-family: 'Orbitron', sans-serif;
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
}

.stat-value {
  display: block;
  font-family: 'Orbitron', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  text-shadow: 0 0 12px var(--primary-dim);
}

.stat-value.accent {
  color: var(--accent);
  text-shadow: 0 0 12px var(--accent)66;
}

.stat-value.combo {
  color: var(--bonus);
  text-shadow: 0 0 14px var(--bonus);
  animation: comboPulse 0.35s ease-out infinite alternate;
}

@keyframes comboPulse {
  from { transform: scale(1); }
  to { transform: scale(1.08); }
}

/* Board */
.board-scene {
  perspective: 900px;
}

.board-wrap {
  position: relative;
  border-radius: 20px;
  padding: 3px;
  background: linear-gradient(135deg, var(--primary)55, var(--accent)90, var(--accent-2)66);
  box-shadow:
    0 0 60px -20px var(--primary-dim),
    0 30px 60px rgba(0, 0, 0, 0.6);
  transform: rotateX(8deg);
  transform-style: preserve-3d;
  transform-origin: 50% 62%;
  overflow: hidden;
}

canvas#board {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 17px;
  background: var(--bg-2);
}

.overlay {
  position: absolute;
  inset: 3px;
  border-radius: 17px;
  background: rgba(7, 7, 13, 0.72);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.35s ease;
  z-index: 5;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay-card {
  text-align: center;
  padding: 24px;
}

.overlay-card h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 34px;
  font-weight: 900;
  letter-spacing: 2px;
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#combo-wrap {
  display: inline-flex !important;
  border-color: var(--bonus)44;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.08), rgba(255, 47, 214, 0.06));
}

.overlay-card p {
  color: var(--text-dim);
  font-size: 16px;
  margin-bottom: 26px;
}

.btn {
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 3px;
  color: #04121a;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border: none;
  border-radius: 12px;
  padding: 14px 46px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 0 22px var(--primary-dim);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 34px var(--primary);
}

.btn:active {
  transform: translateY(0);
}

/* Controls hint */
.controls-hint {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.keys {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.keys .row {
  display: flex;
  gap: 6px;
}

.key {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid #ffffff12;
  box-shadow: 0 4px 0 #00000066;
  cursor: pointer;
  user-select: none;
  transition: transform 0.08s ease, box-shadow 0.08s ease, background 0.15s ease;
}

.key:active {
  transform: translateY(4px);
  box-shadow: 0 0 0 transparent;
}

.key.pause {
  width: 74px;
  font-size: 11px;
  letter-spacing: 1px;
}

.key.busy {
  background: var(--primary);
  color: #04121a;
  box-shadow: 0 0 16px var(--primary);
}

.hint {
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 1px;
}

@media (max-width: 480px) {
  .game { padding: 14px; }
  .logo { font-size: 22px; }
  .stat { padding: 6px 12px; min-width: 60px; }
  .stat-value { font-size: 18px; }
}