.img_dec{
padding:2px;
border:1px #008 solid;
background-color:#ddd;
}

.gallery{display:block;width:500px;border:2px #ddd solid;padding:2px;margin:9px auto;}
.gallery:hover{border:2px #333 solid;}
.div_navegacion{background-color:#c00;color:#fff;padding:9px;font-size:11px;}
.div_navegacion a {color:#fff;text-decoration:underline;}