body { background: url('../images/background.jpg') no-repeat center center fixed; 

  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.bg-indigo { background-color: #3a8418; }

.content { background: #efefef; }
.alert { margin: 0px !important; }