:root {
  --bg-color: #050505;
  --text-color: #ffffff;
  --accent-cyan: #0ff;
  --accent-magenta: #f0f;
  --accent-yellow: #ff0;
  --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-main);
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#game-container {
  position: relative;
  box-shadow: 0 0 50px rgba(0, 255, 255, 0.1);
}

canvas {
  display: block;
  background: radial-gradient(circle at center, #111, #000);
  border: 2px solid #333;
}

#ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none; /* Let clicks pass through to canvas when playing */
}

#score-board {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 24px;
  font-weight: bold;
  text-shadow: 0 0 10px var(--accent-cyan);
}

.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.85);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.screen.active {
  opacity: 1;
  pointer-events: all;
}

h1 {
  font-size: 64px;
  margin-bottom: 10px;
  background: linear-gradient(to right, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-transform: uppercase;
  letter-spacing: 4px;
  filter: drop-shadow(0 0 10px rgba(255, 0, 255, 0.5));
}

p {
  font-size: 24px;
  color: #ccc;
}

.highlight {
  color: var(--accent-yellow);
  font-weight: bold;
}

.controls {
  font-size: 16px;
  margin-top: 30px;
  opacity: 0.7;
}

button {
  margin-top: 30px;
  padding: 15px 40px;
  font-size: 20px;
  background: transparent;
  color: var(--accent-cyan);
  border: 2px solid var(--accent-cyan);
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.2s ease;
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
}

button:hover {
  background: var(--accent-cyan);
  color: #000;
  box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
}