.card { max-width: 450px; margin: 15% auto; }
.form-header {background-color:#313846; color: #fff; text-align: center; margin-top: -50px; margin-bottom: 3rem; padding: 1rem; border-radius: 2px; }
.card .card-body h4{ margin-bottom: 0; padding: .5rem; }

@media (max-width: 767px) {
    .card .card-body h3 { margin-bottom: 0; padding: .1rem; }
}