body {
    font-family: Arial, sans-serif;
    background-color: #003366; 
    color: #ffffff; 
    text-align: center;
    margin: 0;
    padding: 40px;
  }
  
  .contenedor {
    max-width: 600px;
    margin: 0 auto;
  }
  
  h1 {
    margin-bottom: 20px;
  }
  
  .selector {
    margin: 20px 0;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
  }
  
  .selector label,
  .selector select,
  button {
    margin: 10px;
    font-size: 16px;
    color: white;
  }
  
  select {
    padding: 5px;
    background-color: #002244;
    color: white;
    border: none;
    border-radius: 6px;
  }
  
  button {
    padding: 8px 20px;
    border: none;
    border-radius: 8px;
    background-color: #ff9933;
    color: black;
    cursor: pointer;
    font-weight: bold;
  }
  
  button:hover {
    background-color: #ffa94d;
  }
  
  .resultado {
    margin-top: 30px;
  }
  
  .led {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 20px auto;
    border: 4px solid white;
    transition: background-color 0.3s, box-shadow 0.3s;
  }
  
  .led.on {
    background-color: red;
    box-shadow: 0 0 30px red;
  }
  
  .led.off {
    background-color: black;
    box-shadow: none;
  }
  
  #salidaTexto {
    font-size: 20px;
    margin-top: 10px;
  }