body {
    background-color: #f8f9fa;
}

.card {
    margin-bottom: 20px;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.table-responsive {
    overflow-x: auto;
}

.display-4 {
    font-size: 2.5rem;
    font-weight: 300;
    line-height: 1.2;
}