body {
 background-color: black;
 font-family: Roboto;
 color: white;
 text-align: center;
margin: 80px 550px 0 550px;

}

@font-face {
  font-family: 'Corpta';
}

a:link {
  color: white;
}

/* visited link */
a:visited {
  color: white;
}

/* mouse over link */
a:hover {
  color: gray;
}

/* selected link */
a:active {
  color: white;
}

blockss {
  position: fixed;
  top: 50%;
  left: 50%;
  margin: 0; 
  transform: translate(-50%, -50%);
  z-index: 9999; 
}