:root {
  --bg-color: #0f0f13;
  --board-bg: #1a1a20;
  --text-color: #ffffff;
  --neon-blue: #00f3ff;
  --neon-pink: #ff00ff;
  --ui-border: #333;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
}

.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.game-header h1 {
  font-size: 3rem;
  text-shadow: 0 0 10px var(--neon-blue), 0 0 20px var(--neon-pink);
  letter-spacing: 5px;
  margin-bottom: 10px;
  background: linear-gradient(45deg, var(--neon-blue), var(--neon-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.game-layout {
  display: flex;
  gap: 30px;
  align-items: flex-start;
}

.game-board-container {
  position: relative;
  border: 2px solid var(--ui-border);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  background-color: var(--board-bg);
}

canvas {
  display: block;
}

#game-canvas {
  border: 1px solid #222;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 10;
}

.overlay.hidden {
  display: none;
}

.overlay h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  text-shadow: 0 0 10px var(--neon-blue);
}

#start-btn {
  background: transparent;
  border: 2px solid var(--neon-blue);
  color: var(--neon-blue);
  padding: 10px 30px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  font-weight: bold;
}

#start-btn:hover {
  background: var(--neon-blue);
  color: var(--bg-color);
  box-shadow: 0 0 15px var(--neon-blue);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 150px;
}

.info-box {
  background: var(--board-bg);
  border: 1px solid var(--ui-border);
  padding: 15px;
  text-align: center;
  border-radius: 5px;
}

.info-box h3 {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 5px;
  letter-spacing: 1px;
}

.info-box p {
  font-size: 1.5rem;
  font-weight: bold;
}

#next-canvas {
  margin: 0 auto;
}

.controls-info {
  margin-top: 10px;
  font-size: 0.8rem;
  color: #666;
  line-height: 1.6;
}