body{background-color:#99ccff;font-family: Arial, Helvetica, sans-serif;
}
header, footer, section, article {
  margin: 10px;
  background: green;
  border-radius: 6px;
  color: white;
  padding: 28px 15px;
  box-shadow: -1px 2px 5px 1px rgba(0, 0, 0, 0.7);
  display:block;
}
aside {
  margin: 10px;
  background: green;
  border-radius: 6px;
  color: white;
  padding: 28px 15px;
  box-shadow: -1px 2px 5px 1px rgba(0, 0, 0, 0.7);
  display:block;
}

#Burgos img {
  float: right;
  margin-left:10px;
}
header, footer {
  text-align:center;
  clear: both;
}
section {
  float: left;
  width: 60%;
}

aside {
  float: right;
  width: 25%;
}
h1{color:yellow;font-size:250%}
h2{color:yellow;font-size:200%}
h3{color:yellow;font-size:200%}
h4{color:yellow;font-size:200%}
h5{color:yellow;font-size:200%}
h6{color:yellow;font-size:200%}
h7{color:yellow;font-size:200%}
h8{color:yellow;font-size:200%}
h9{color:yellow;font-size:150%}
h10{color:yellow;font-size:150%}
h11{color:yellow;font-size:100%}
h12{color:yellow;font-size:200%}