body {
  margin: auto;
  width: 640px; 
  padding: 50px;
  font-family: 'Avenir', sans-serif; 
  color: #33475b;
  text-align: center;	 
}

/* Centered Image Code */

 .center {
  
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid #dbe4ed; /* Border color is optional */  
 }