.form-bg {
  background-image: url("https://cdn.dcrypto.com/comet/register-bg.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

body { 
  background: url(https://cdn.dcrypto.com/comet/main-bg.png) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.alert {
    padding: .25rem .25rem;
    margin-bottom: 0rem;
}