body {
          background-image: url('Imagenes/Background.jpg');
          background-size: cover;
	      background-attachment: fixed;
	      background-position: center;

  display: flex;
  justify-content: center; /* horizontal center */
  margin: 0;

        }

.site{
    display: grid;
    grid-template-rows: 50px 10px;
    grid-template-columns: 754px;    
}


#Head{
    grid-row: 1 / 1;
    grid-column: 1 / 1;
    width: 754px;
    height: 50px;
    padding-top: 5px;
    padding-left: 6px;
    font-size: 20px;
    background:#080917;
    border: 3px ridge #BCBCBC;
    text-align:left ;
    color: blue;
    font-family: 'Comic Sans MS', cursive;
    font-size: 25px;
}

#Main{
    grid-row: 2 / 2;
    grid-column: 1 / 1;
    width: 754px;
    height: 700px;
    padding-top: 5px;
    padding-left: 6px;
    font-size: 20px;
    background:#080917;
    border: 3px ridge #BCBCBC;
    text-align: center;
    color: blue;
    font-family: 'Comic Sans MS', cursive;
    font-size: 28px;
}