#tetris-container {
  position: relative;
  width: 260px; /* canvas + controls width */
  margin: 0 auto;
}
#scoreboard {
  display: flex;
  justify-content: space-around;
  color: #000;
  font-family: monospace;
  margin-bottom: 5px;
}
#scoreboard span { margin: 0 10px; }
#game-over {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  transform: translateY(-50%);
  font-size: 2em;
  color: red;
  background: rgba(255,255,255,0.8);
  text-align: center;
  display: none;
  z-index: 10;
  pointer-events: none;
}
#tetris {
  border: 2px solid #333;
  background: #000;
  display: block;
  margin: 0 auto;
}
#controls {
  display: flex;
  justify-content: center;
  margin-top: 10px;
}
#controls button {
  width: 50px;
  height: 50px;
  margin: 0 5px;
  font-size: 24px;
  border: none;
  background: #444;
  color: #fff;
  border-radius: 4px;
}
#controls button:active {
  background: #666;
}


/* Restart button styling */
#game-over button {
  margin-top: 10px;
  padding: 8px 16px;
  font-size: 1em;
  cursor: pointer;
}


/* Restart button styling */
#game-over button {
  margin-top: 10px;
  padding: 8px 16px;
  font-size: 1em;
  cursor: pointer;
}

#unique-code {
  display: block;
  margin-top: 5px;
  color: blue;
  font-style: italic;
}