#content{height:100%}
#botonera{width:540px;margin:-60px auto 0;text-align:center;position:relative;top:40%;}
#botonera a{width:150px;height:70px;padding:8px 7px;display:block;float:left;border:2px solid #333;margin:0 10px 10px 0;text-decoration:none;font-size:1.3em}
#botonera a span{color:#fff;font-weight:bold;text-align:center;display:block;line-height:1.6em;padding:21px 0 0}
#botonera a#cci span,#botonera a#msjSis span{padding:0}
#botonera a#msj span{padding:14px 0 0}
#botonera a#uspass span{padding:13px 0 0}
#botonera a:hover{border-color:#111;}