body {
  background-image: url("../background.gif");
  background-repeat: repeat;
  background-attachment: fixed;
  background-color: Black;
  color: white;
  font-family: monospace;
  font-size: 16px
}

#main {
  background-color: black;
  border: 1px dotted;
  border-radius: 5px;
  padding: 5px;
  margin-left: auto;
  margin-right: auto;
}

@media only screen and (min-width: 641px) {
  .center {
  margin: auto;
  width: 50%;
  padding: 10px;
  }
}