body {
  background: #000;
  color: #0f0;
  font-family: monospace;
  margin: 0;
  padding: 20px;
}
#container {
  display: none;
  width: fit-content;
  margin: auto;
  text-align: center;
}
#game canvas {
  display: block;
  margin: 0 auto;
  box-shadow: 0 0 10px rgba(255,255,0,0.5);
}
.controls-panel {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
button {
  background: #222;
  border: 1px solid #0f0;
  color: #0f0;
  font-family: monospace;
  font-size: 14px;
  padding: 8px 16px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}
button:hover {
  background: #0f0;
  color: #000;
  transform: scale(1.02);
}
#userboard, #leaderboard {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #111;
  border: 2px solid #0f0;
  padding: 20px;
  z-index: 100;
  color: #0f0;
  font-family: monospace;
  min-width: 300px;
  text-align: center;
}
#leaderboard-link {
  position: fixed;
  bottom: 20px;
  left: 20px;
  color: #0f0;
  cursor: pointer;
  text-decoration: underline;
  font-family: monospace;
}
#loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 24px;
  color: #0f0;
}