html, body{background: #EFEFEF;}
h1{font-size: 14pt;}
#caja{position: absolute; left: 20%; top: 20%; background: white; padding: 15px; width: 60%;}
#caja{-moz-border-radius: 30px 0px 30px 0px; -webkit-border-radius: 30px 0px 30px 0px; border: 5px solid #E7E7E7;}