body {
    background-color: #f8f9fa;
}

h1 {
    color: #343a40;
}

.form-group {
    margin-bottom: 1.5rem;
}

.btn-block {
    padding: 0.75rem;
}

.alert-heading {
    font-size: 1.5rem;
}

#loading {
    margin-top: 20px;
}