style.css

/* GENERAL */
body {
  background-color: #000;
  padding: 30px 50px;
  font-family: 'Roboto Slab', serif;
}
h1 {
  color: #409;
}
h3 {
  margin: 0
}
a {
  display: inline-block;
  background-color: #409;
  color: #fff;
  padding: 10px 20px;
  text-decoration: none;
}
.ignore-it {
/*   This is only to make both block have the same distance from body top */
  margin-top: 20px;
}
/* BLOCK */
.block-border {
  position: relative;
  max-width: 400px;
  float: left;
  margin-right: 100px;
  margin-bottom: 100px;
}
.bg-block {
  position: absolute;
  height: 100%;
  width: 100%;
  background-color: #fff;
}
.content-border {
  border: solid 3px #409;
  padding: 40px;
  position: relative;
}
.bg-block.right {
  left: -20px;
  top: -20px;
}
.bg-block.left {
  right: -20px;
  bottom: -20px;
}