body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar-brand {
    font-weight: bold;
}

.card {
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card-header {
    background-color: #f1f5f9;
    font-weight: 600;
}

.table th {
    background-color: #e9ecef;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .table-responsive {
        font-size: 0.9rem;
    }
    .card-body .row > div {
        margin-bottom: 10px;
    }
}

/* Print styles */
@media print {
    .navbar, .btn, .card-header, .dataTables_filter, .dataTables_length, .dataTables_paginate {
        display: none !important;
    }
    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    table {
        border-collapse: collapse;
        width: 100%;
    }
    th, td {
        border: 1px solid #000;
        padding: 5px;
    }
}