:root {
  --board-width: 300px;
  --board-height: 600px;
  --cell-size: 30px;
  --bg-color: #1a1a2e;
  --panel-bg: #16213e;
  --text-color: #e0e0e0;
  --accent-color: #e94560;
  --border-color: #0f3460;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
}

.game-container {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.left-panel,
.right-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 140px;
}

.board-panel {
  position: relative;
  border: 3px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 0 20px rgba(233, 69, 96, 0.15);
}

#board {
  display: block;
  background-color: #0a0a1a;
}

.info-box {
  background-color: var(--panel-bg);
  border: 2px solid var(--border-color);
  border-radius: 6px;
  padding: 12px;
  text-align: center;
}

.info-box h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.info-box p {
  font-size: 1.8rem;
  font-weight: 700;
}

.info-box canvas {
  display: block;
  margin: 0 auto;
  background-color: #0a0a1a;
  border-radius: 4px;
}

.controls {
  background-color: var(--panel-bg);
  border: 2px solid var(--border-color);
  border-radius: 6px;
  padding: 12px;
}

.controls h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-color);
  margin-bottom: 10px;
  text-align: center;
}

.controls ul {
  list-style: none;
}

.controls li {
  font-size: 0.75rem;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

kbd {
  background-color: var(--border-color);
  border: 1px solid var(--accent-color);
  border-radius: 3px;
  padding: 1px 6px;
  font-size: 0.7rem;
  font-family: inherit;
  min-width: 20px;
  text-align: center;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
}

.overlay.hidden {
  display: none;
}

.overlay-content {
  text-align: center;
}

.overlay-content h1 {
  font-size: 4rem;
  color: var(--accent-color);
  text-shadow: 0 0 30px rgba(233, 69, 96, 0.5);
  margin-bottom: 20px;
}

.overlay-content p {
  font-size: 1.2rem;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}