* {
margin: 0;
padding: 0;
}

a {
color: #fff;
}

.fotos a span {
display: none;
width: 160px;
background: url('blanco.png');  */
color: #000000;
padding-left:10px; padding-right:10px; padding-top:0; padding-bottom:10px
}

.fotos a:hover span {
display: block;
position: fixed;
top:1em; right:12em;
text-align: top;
}