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

.stat-card {
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.table th {
    font-weight: 600;
    font-size: 0.875rem;
}

.card-header {
    font-weight: 600;
}

.navbar-brand {
    font-size: 1.1rem;
}

.spinner-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

@media print {
    .navbar, .btn, form, .card-footer, .spinner-overlay {
        display: none !important;
    }
    .card {
        border: 1px solid #dee2e6 !important;
        box-shadow: none !important;
    }
}

@media (max-width: 768px) {
    .table {
        font-size: 0.85rem;
    }
    h4 {
        font-size: 1rem;
    }
}