/* Add here all your CSS customizations */
 .antispam { display:none;}
 img { border: 0; }
 
 @media screen and (max-width: 980px) {
    div#cabezera {
    display: none;
    }
    }
/* Add here all your CSS customizations */
/* Add here all your CSS customizations */

/* Add here all your CSS customizations */
/* Add here all your CSS customizations */
optgroup{
    margin: 1em;
    border: 1px solid green;
    }
    optgroup option{
    margin: 1em;
    border: 1px solid orange;
    }