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

body {
  font-family: 'Courier New', monospace;
  background-color: #0a0a0a;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.game-container {
  display: flex;
  gap: 30px;
  background-color: #1a1a1a;
  padding: 20px;
  border-radius: 8px;
  border: 2px solid #00f0f0;
  box-shadow: 0 0 20px rgba(0, 240, 240, 0.3);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 200px;
}

.sidebar h1 {
  font-size: 24px;
  color: #00f0f0;
  text-shadow: 0 0 10px #00f0f0;
  margin-bottom: 10px;
}

.stats {
  background-color: #0a0a0a;
  padding: 15px;
  border-radius: 4px;
  border-left: 3px solid #00f0f0;
}

.stats div {
  margin: 8px 0;
  font-size: 16px;
  font-weight: bold;
}

.stats span {
  color: #00f0f0;
}

.next-piece {
  background-color: #0a0a0a;
  padding: 15px;
  border-radius: 4px;
  border: 2px solid #333;
  text-align: center;
}

.next-piece p {
  margin-bottom: 10px;
  font-weight: bold;
}

#nextCanvas {
  background-color: #000;
  border: 1px solid #333;
  display: block;
  margin: 0 auto;
  image-rendering: pixelated;
}

.speed-control {
  background-color: #0a0a0a;
  padding: 15px;
  border-radius: 4px;
  border: 2px solid #333;
  font-size: 13px;
}

.speed-control p {
  margin: 8px 0 5px 0;
  font-weight: bold;
}

.speed-control input {
  width: 100%;
  height: 6px;
  cursor: pointer;
  accent-color: #00f0f0;
}

.controls {
  background-color: #0a0a0a;
  padding: 15px;
  border-radius: 4px;
  border: 2px solid #333;
  font-size: 13px;
  line-height: 1.6;
}

.controls p {
  margin: 5px 0;
}

.controls strong {
  color: #00f0f0;
}

button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  background-color: #00f0f0;
  color: #000;
  border: none;
  border-radius: 4px;
  font-weight: bold;
  cursor: pointer;
  font-family: 'Courier New', monospace;
  transition: all 0.3s;
}

button:hover:not(:disabled) {
  background-color: #00ffff;
  box-shadow: 0 0 10px rgba(0, 240, 240, 0.5);
  transform: scale(1.05);
}

button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.game-area {
  position: relative;
}

#gameCanvas {
  background-color: #000;
  border: 3px solid #00f0f0;
  display: block;
  image-rendering: pixelated;
  box-shadow: 0 0 20px rgba(0, 240, 240, 0.2);
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  backdrop-filter: blur(2px);
}

.overlay.hidden {
  display: none;
}

.overlay-content {
  text-align: center;
  background-color: #1a1a1a;
  padding: 30px;
  border-radius: 8px;
  border: 2px solid #f0f000;
}

.overlay-content h2 {
  font-size: 32px;
  color: #f0f000;
  margin-bottom: 20px;
  text-shadow: 0 0 10px #f0f000;
}

.overlay-content p {
  font-size: 18px;
  margin: 10px 0;
  color: #00f0f0;
}

.overlay-content button {
  margin-top: 20px;
  background-color: #f0f000;
  color: #000;
}

.overlay-content button:hover {
  background-color: #ffff00;
}

@media (max-width: 768px) {
  .game-container {
    flex-direction: column;
    gap: 20px;
  }

  #gameCanvas {
    width: 100%;
    height: auto;
  }

  .sidebar {
    min-width: auto;
  }
}