body {
    background-color: #f8f9fa;
}
.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
    border: none;
    border-radius: 0.5rem;
}
.card-header {
    background-color: #fff;
    border-bottom: 1px solid rgba(0,0,0,0.125);
    font-weight: 600;
}