/* Core Layout */
body {
    background-color: #1a1a1a;
    color: #e1e1e1;
 }
 
 .container-fluid {
    padding: 20px;
 }
 
 /* Navigation */
 .navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
 }
 
 .navbar-dark .navbar-nav .nav-link.active {
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
 }
 
 /* Cards */
 .card {
    background-color: #2a2a2a;
    border: 1px solid #404040;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
 }
 
 .card-header {
    background-color: rgba(0,0,0,0.2);
    border-bottom: 1px solid #404040;
 }
 
 /* Tables */
 .table-dark {
    background-color: #2a2a2a;
    color: #e1e1e1;
 }
 
 .table-dark thead th {
    background-color: #1a1a1a;
    border-color: #404040;
 }
 
 .table-hover tbody tr:hover {
    background-color: rgba(255,255,255,0.05);
 }
 
 /* Forms */
 .form-control {
    background-color: #2a2a2a;
    border-color: #404040;
    color: #e1e1e1;
 }
 
 .form-control:focus {
    background-color: #2a2a2a;
    border-color: #0d6efd;
    color: #e1e1e1;
    box-shadow: 0 0 0 0.2rem rgba(13,110,253,0.25);
 }
 
 .form-select {
    background-color: #2a2a2a;
    border-color: #404040;
    color: #e1e1e1;
 }
 
 /* Buttons */
 .btn-close-white {
    filter: invert(1) grayscale(100%) brightness(200%);
 }
 
 /* Modals */
 .modal-content {
    background-color: #2a2a2a;
    border: 1px solid #404040;
 }
 
 .modal-header, .modal-footer {
    border-color: #404040;
 }
 
 /* Stats Cards */
 .stats-card {
    transition: transform 0.2s;
 }
 
 .stats-card:hover {
    transform: translateY(-5px);
 }
 
 /* Alerts */
 #alert-container {
    z-index: 9999;
 }
 
 .alert {
    margin-bottom: 10px;
 }
 
 /* DataTables Customization */
 .dataTables_wrapper {
    padding: 15px 0;
 }
 
 .dataTables_length, 
 .dataTables_filter,
 .dataTables_info,
 .dataTables_paginate {
    color: #e1e1e1 !important;
 }
 
 .page-link {
    background-color: #2a2a2a;
    border-color: #404040;
    color: #e1e1e1;
 }
 
 .page-item.active .page-link {
    background-color: #0d6efd;
    border-color: #0d6efd;
 }
 
 /* Loading Spinner */
 .spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
 }
 
 .spinner-border {
    width: 3rem;
    height: 3rem;
 }
 
 /* Custom Scrollbar */
 ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
 }
 
 ::-webkit-scrollbar-track {
    background: #1a1a1a;
 }
 
 ::-webkit-scrollbar-thumb {
    background: #404040;
    border-radius: 4px;
 }
 
 ::-webkit-scrollbar-thumb:hover {
    background: #555;
 }
 
 /* Responsive Adjustments */
 @media (max-width: 768px) {
    .container-fluid {
        padding: 10px;
    }
    
    .card {
        margin-bottom: 15px;
    }
    
    .table-responsive {
        border: 0;
    }
 }