body {
      background-image: url(/cultura/img/fondo\ tetris.jpg);
      background-size: 1600PX;
      color: #fff;
      font-family: monospace;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      margin: 0;
    }

    #score {
      position: absolute;
      top: 20px;
      left: 20px;
      font-size: 20px;
      color: #fff;
      font-weight: bold;
    }

    #instrucciones {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background-color: rgba(255, 255, 255, 0.1);
      padding: 10px 15px;
      border-radius: 8px;
      font-size: 14px;
      max-width: 250px;
      line-height: 1.5;
      border: 1px solid #fff;
    }

    canvas {
      border: 2px solid #fff;
      background: #000;
    }
    .btn-jugar {
    display: inline-block;
    margin-top: 1em;
    background-color: #28a745;
    color: white;
    padding: 0.5em 1em;
    border-radius: 5px;
    text-decoration: none;
    position: absolute;
    top: 50px;   
    left: 20px;
}
#controls {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

#controls button {
  width: 60px;
  height: 60px;
  font-size: 24px;
  border: none;
  border-radius: 8px;
  background: #333;
  color: #fff;
  cursor: pointer;
}

#controls button:active {
  background: #555;
}