body {
  padding-left: 2em;
  padding-right: 2em;
  font-family: sans-serif;
  background-color: #0a0a0a;
}

img.logo {
   height: 250px;
   left: 50%;
   margin-top: -125px;
   margin-left: -125px;
   position: absolute;
   top: 50%;
   width: 250px;
   float: left;
}