body      {
            background-color: #000000;
          }
.position { 
            width:100%;
            text-align:center;
            height:90%;
          }
.main     {
            background-color: #000000; 
            border-color: #000000;
            border-width: 1px;
            border-style: solid;
            margin-left: auto;
            margin-right: auto;
          }