body {
      font-family: Arial, Helvetica, sans-serif;
      margin: 20px;
      background-image: url(imagenes/fondo2.jpg);
      color: black;
      text-align: center;
    }
    h2 {
      margin-bottom: 5px;
    }
    p {
      font-size: 14px;
      margin-top: 0;
      margin-bottom: 10px;
    }
    table {
      width: 100%;
      border-collapse: collapse;
    }
    th, td {
      border: 1px solid black;
      padding: 6px;
      vertical-align: top;
      text-align: center;
    }
    th {
      text-align: center;
    }
    .center {
      text-align: center;
    }
    .right {
      text-align: right;
    }
    .espacio td {
      height: 22px;
      border: 1px solid black;
    }