:root {
  --primary-color: #ffde00; /* Super Saiyan Gold */
  --secondary-color: #00bfff; /* Ice Blue */
  --bg-color: #1a0b2e; /* Deep Space */
  --danger-color: #ff4136;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  background-color: var(--bg-color);
  color: white;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

#game-container {
  position: relative;
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  /* Pixel art look */
  image-rendering: pixelated; 
}

#ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.screen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background: rgba(0, 0, 0, 0.85);
  padding: 2rem;
  border-radius: 15px;
  border: 2px solid var(--primary-color);
  box-shadow: 0 0 20px var(--primary-color);
  pointer-events: auto;
  transition: opacity 0.3s;
  min-width: 300px;
}

.hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden; /* Ensure it doesn't block clicks */
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  background: linear-gradient(to bottom, #fff, var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 10px rgba(255, 222, 0, 0.5);
}

p {
  margin-bottom: 2rem;
  font-size: 1.1rem;
  color: #ddd;
}

button {
  background: linear-gradient(45deg, #ff8c00, var(--primary-color));
  border: none;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  font-weight: bold;
  color: #333;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 0 15px var(--primary-color);
  transition: transform 0.1s, box-shadow 0.1s;
}

button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px var(--primary-color);
}

button:active {
  transform: scale(0.95);
}

#score-board {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 1.5rem;
  font-weight: bold;
  text-shadow: 2px 2px 4px #000;
  color: var(--secondary-color);
}

#loading {
  z-index: 10;
}