body {margin: 0; padding: 0;}
.caja {width:100%; font-family: 'Fira Sans', sans-serif; font-size: 16px; line-height:normal; text-align: left; color:#333; }
header {background-color:#DEE7EE; font-size:2.83em; font-weight:bold; padding:5px 0; text-align:center; }
header img {vertical-align: middle;}
header h2 {font-size: 0.63em; background:#99CCFF; font-weight:700; margin:10px 0 2px;}
article {width:1000px; margin:0 auto;} 
article h1 {font-style:italic; color:#006699;}
h3 {color:#666;}
#fecha {color:grey; font-size:0.83em;}
#fecha span {color:red;}