.header {
  text-align: center;
  margin-bottom: 2em;
}

.subheader {
  margin-top:1em;
}

.userForm {
  margin-top: 2em;
}

.form-control, .form-group {
  margin-top:0.7em;
}

.btn {
  margin-top: 2em;
  margin-bottom: 3em;
}

.img-fluid {
  margin-bottom: 2em;
}