body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
}
.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}
.sidebar-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 48px);
    padding-top: .5rem;
    overflow-x: hidden;
    overflow-y: auto;
}
.sidebar .nav-link {
    font-weight: 500;
    color: #333;
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    margin: 0.125rem 0.5rem;
    transition: all 0.2s;
}
.sidebar .nav-link:hover {
    color: #007bff;
    background-color: rgba(0, 123, 255, 0.1);
}
.sidebar .nav-link.active {
    color: #007bff;
    background-color: rgba(0, 123, 255, 0.1);
}
.sidebar .nav-link i {
    margin-right: 0.5rem;
    width: 1.25rem;
    text-align: center;
}
main {
    padding-top: 48px;
}
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border-radius: 0.5rem;
}
.card-header {
    background-color: #fff;
    border-bottom: 1px solid #dee2e6;
    font-weight: 600;
}
.card.bg-primary,
.card.bg-success,
.card.bg-warning,
.card.bg-info,
.card.bg-danger {
    border: none;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
}
.card.bg-primary {
    background: linear-gradient(135deg, #007bff, #0056b3);
}
.card.bg-success {
    background: linear-gradient(135deg, #28a745, #1e7e34);
}
.card.bg-warning {
    background: linear-gradient(135deg, #ffc107, #e0a800);
}
.card.bg-info {
    background: linear-gradient(135deg, #17a2b8, #138496);
}
.card.bg-danger {
    background: linear-gradient(135deg, #dc3545, #c82333);
}
.table {
    margin-bottom: 0;
}
.table th {
    border-top: none;
    font-weight: 600;
    color: #495057;
    background-color: #f8f9fa;
}
.table-hover tbody tr:hover {
    background-color: rgba(0, 123, 255, 0.05);
}
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.2s;
}
.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}
.btn-outline-secondary:hover {
    background-color: #6c757d;
    border-color: #6c757d;
    color: #fff;
}
.form-control {
    border-radius: 0.375rem;
    border: 1px solid #ced4da;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}
.form-check-input:checked {
    background-color: #007bff;
    border-color: #007bff;
}
.modal-content {
    border-radius: 0.5rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}
.modal-header {
    border-bottom: 1px solid #dee2e6;
}
.modal-footer {
    border-top: 1px solid #dee2e6;
}
.list-group-item {
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.375rem;
    margin-bottom: 0.5rem;
}
.list-group-item:hover {
    background-color: rgba(0, 123, 255, 0.05);
}
.pagination {
    margin-top: 1rem;
}
.page-link {
    color: #007bff;
    border-radius: 0.375rem;
    margin: 0 0.125rem;
}
.page-item.active .page-link {
    background-color: #007bff;
    border-color: #007bff;
}
.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}
.navbar-nav .nav-link {
    font-weight: 500;
}
@media (max-width: 767.98px) {
    .sidebar {
        position: fixed;
        top: 56px;
        left: -280px;
        width: 280px;
        height: calc(100vh - 56px);
        padding: 0;
        background: #fff;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s ease-in-out;
        z-index: 999;
        overflow-y: auto;
    }
    
    .sidebar.show {
        left: 0;
    }
    
    .sidebar .position-sticky {
        position: static !important;
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 56px;
        left: 0;
        width: 100%;
        height: calc(100vh - 56px);
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
        opacity: 0;
        transition: opacity 0.3s ease-in-out;
        backdrop-filter: blur(2px);
    }
    
    main {
        padding-top: 0;
        margin-top: 1rem;
        width: 100%;
        margin-left: 0;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        border-radius: 0.375rem;
        font-size: 0.875rem;
    }
    
    .btn {
        padding: 0.375rem 0.75rem;
        font-size: 0.875rem;
    }
}
.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.spinner-border {
    width: 2rem;
    height: 2rem;
}
.badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
}
.alert {
    border-radius: 0.5rem;
    border: none;
}
.alert-warning {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    color: #856404;
}
.alert-danger {
    background: linear-gradient(135deg, #f8d7da, #fab1a0);
    color: #721c24;
}
.alert-info {
    background: linear-gradient(135deg, #d1ecf1, #74b9ff);
    color: #0c5460;
}
.tooltip {
    font-size: 0.875rem;
}
.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}
.shadow {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}
.shadow-lg {
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}
@media print {
    .sidebar,
    .navbar,
    .btn,
    .pagination {
        display: none !important;
    }
    
    main {
        margin-left: 0 !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
}