body {
  background-color:#ff7f00;
}

#enter {
  text-align: center;
}

#main {
  margin-right: auto;
  margin-left: auto;
  text-align: left;
  width: 740px;
}

#main a {
  text-decoration: none;
}

#header {
  text-align: center;
}

#navbar {
  text-align: center;
}

#navbar a {
  text-decoration: none;
}