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

.center {
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0px solid #fff;

}