body{
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  overflow-y: auto;
}
header{
  top: 0;
  position: absolute;
  background: #3A539B;
  width: 100%;
  color: #fff;
  text-align: center;
  border-bottom: 0px solid;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
}
footer{
  font-size: 80%;
  background: #F4B350;
  padding: 1% 0;
  text-align: center;
  position: fixed;
  width: 100%;
  bottom: 0;
  color: #fff;
  border-top: 0px solid;
  border-top-right-radius: 10px;
  border-top-left-radius: 10px;
}
footer a{
  text-decoration: none;
  color: #fff;
}
footer a:hover{
  color: #00f;
  text-decoration: underline;
}
#corpo{
  position: static;
  margin: 10% 20%;
  max-width: 60%;
  text-align: center;
}
#corpo a{
  width: 50%;
  background: #3498DB;
  display: inline-block;
  text-decoration: none;
  color: #fff;
  padding: 2%;
  font-size: 110%;
  border: 0px solid;
  border-radius: 10px;
  transition: 0.4s;
}
#corpo a:hover{
  transition: 0.4s;
  background: #1F3A93;
  border-left: 10px solid #AEA8D3;
}