body,html {
    width:98%;
    height:90%;
}

#isotipo {
    background-image:url('imgs/isotipo.jpg');
    background-position:center;
    background-repeat:no-repeat;
    background-size:contain;
    width:30%;
    height:30%;
    margin:10% auto;
}
#mensaje {
    font-family: Arial;
    font-size: 2vh;
    color:black;
    margin:auto auto;
    width:100%;
    text-align:center;
}