body {
    background-attachment: fixed;
    background-image: url(/apartados/img/Background_tech_support.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    color: #f5f5f5;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }

  h2 {
    font-weight: bold;
    color: #d4af37;
    margin-bottom: 10px;
    font-size: 18px;
    margin-left: 26%;
  }

  .calculator {
    background-color: #2a2a2a;
    border: 1px solid #444;
    border-radius: 12px;
    padding: 30px;
    margin: 40px auto;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
    max-width: 600px;
  }

  label, select, input[type="number"] {
    display: block;
    width: 100%;
    margin-top: 10px;
  }

  input, select {
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #555;
    background-color: #333;
    color: white;
  }

  button {
    margin-top: 20px;
    width: 100%;
    padding: 12px;
    background-color: gold;
    border: none;
    border-radius: 8px;
    color: #1c1c1c;
    font-weight: bold;
    cursor: pointer;
  }

  .result {
    margin-top: 20px;
    font-size: 1.2em;
    text-align: center;
  }

  .back-button {
    display: block;
    margin: 40px auto 0;
    padding: 12px 24px;
    background-color: #d4af37;
    color: #1e1e1e;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    text-align: center;
    transition: background-color 0.3s ease;
    width: fit-content;
  }
  
  .back-button:hover {
    background-color: #b8902f;
  }