body {
    background-image: url(fondo.jpg);
    font-family: Georgia, Times, serif;
    font-size: 18px;
    }

  caption { 
    color: blue; 
    font-size: 24px; 
    }

  th {
    background-color: #06DEF8;
    color:white;
    padding:5px;
    }

  td {
    border:1px solid white;
    padding:5px;
    }

  tfoot {
    background-color: #06DEF8;
    color:white;
    padding:5px;
    }
    
  .centrar_tabla {
    text-align:center; 
    width: 50%; 
    border="3"; 
    margin: 0 auto 0 auto;
    }