body {
  background-image: url("wallpaper.png");
  background-attachment: fixed;
  background-size: cover;
  color: white;
  font-family: arial;
  text-shadow: 2px 2px 2px #000000;
} 

.sidebox {
  background-color: #3651ad;
  border: 8px solid #031f4e;
  text-align: center;
  padding: 25px;
  margin: 35px;
  width: 27%;
}