    /* Modern Theme Custom Variables - Contemporary Design */
    :root {
        --modern-primary: #7c3aed;       /* Vibrant Purple - Main accent */
        --modern-secondary: #ec4899;     /* Hot Pink - Secondary accent */
        --modern-accent: #8b5cf6;        /* Light Purple - Hover states */
        --modern-light: #f5f3ff;         /* Very Light Purple - Backgrounds */
        --modern-dark: #1e293b;          /* Slate Dark - Text and headers */
        --modern-surface: #ffffff;       /* Pure White - Cards and surfaces */
        --modern-border: #e2e8f0;        /* Light Gray - Borders */
        --modern-text: #334155;          /* Slate - Primary text */
        --modern-text-secondary: #64748b; /* Slate Gray - Secondary text */
        --modern-success: #10b981;       /* Emerald - Success states */
        --modern-warning: #f59e0b;       /* Amber - Warnings */
        --modern-danger: #ef4444;        /* Red - Errors */
        --modern-info: #3b82f6;          /* Blue - Information */
        --modern-gradient-start: #7c3aed;
        --modern-gradient-end: #ec4899;
    }

    .bd-placeholder-img {
        font-size: 1.125rem;
        text-anchor: middle;
        -webkit-user-select: none;
        -moz-user-select: none;
        user-select: none;
    }

    @media (min-width: 768px) {
        .bd-placeholder-img-lg {
            font-size: 3.5rem;
        }
    }

    /* Modern Theme Styles */
    body {
        background: linear-gradient(135deg, var(--modern-light) 0%, #ffffff 100%);
        font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        color: var(--modern-text);
        line-height: 1.6;
        letter-spacing: -0.011em;
    }

    /* Typography */
    h1, h2, h3, h4, h5, h6 {
        font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        color: var(--modern-dark);
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 1rem;
        letter-spacing: -0.02em;
    }

    h1 {
        font-size: 2.5rem;
        font-weight: 800;
    }

    h2 {
        font-size: 2rem;
        font-weight: 700;
    }

    h3 {
        font-size: 1.5rem;
    }

    p {
        margin-bottom: 1rem;
        color: var(--modern-text);
    }

    /* Custom Navbar Styling */
    .navbar-modern {
        background: var(--modern-surface) !important;
        box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
        border-bottom: 1px solid var(--modern-border);
        padding: 1rem 0;
    }

    .navbar-modern .navbar-brand,
    .navbar-modern .nav-link {
        color: var(--modern-text) !important;
        font-weight: 500;
        transition: all 0.2s ease;
        font-size: 0.95rem;
    }

    .navbar-modern .nav-link:hover {
        color: var(--modern-primary) !important;
        background-color: var(--modern-light);
        border-radius: 6px;
        transform: translateY(-1px);
    }

    .navbar-modern .navbar-toggler {
        border-color: var(--modern-border);
        border-radius: 6px;
    }

    .navbar-modern .navbar-toggler:focus {
        box-shadow: 0 0 0 0.2rem rgba(124, 58, 237, 0.25);
    }

    .navbar-modern .navbar-toggler-icon {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28124, 58, 237, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='m4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    /* Custom Button Styles */
    .btn-modern-primary {
        background: linear-gradient(135deg, var(--modern-gradient-start) 0%, var(--modern-gradient-end) 100%);
        border: none;
        color: white;
        border-radius: 8px;
        padding: 0.625rem 1.25rem;
        font-weight: 600;
        font-size: 0.95rem;
        transition: all 0.3s ease;
        box-shadow: 0 2px 4px rgba(124, 58, 237, 0.2);
    }

    .btn-modern-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 12px rgba(124, 58, 237, 0.3);
        color: white;
    }

    .btn-modern-primary:active {
        transform: translateY(0);
    }

    .btn-modern-secondary {
        background-color: var(--modern-surface);
        border: 2px solid var(--modern-primary);
        color: var(--modern-primary);
        border-radius: 8px;
        padding: 0.625rem 1.25rem;
        font-weight: 600;
        font-size: 0.95rem;
        transition: all 0.3s ease;
    }

    .btn-modern-secondary:hover {
        background-color: var(--modern-primary);
        border-color: var(--modern-primary);
        color: white;
        transform: translateY(-2px);
        box-shadow: 0 6px 12px rgba(124, 58, 237, 0.3);
    }

    .btn-modern-secondary:active {
        transform: translateY(0);
    }

    /* Card Styles */
    .card {
        border: 1px solid var(--modern-border);
        border-radius: 12px;
        box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
        transition: all 0.3s ease;
        background: var(--modern-surface);
    }

    .card:hover {
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-2px);
    }

    .card-header {
        background: linear-gradient(135deg, var(--modern-gradient-start) 0%, var(--modern-gradient-end) 100%);
        color: white;
        border-bottom: none;
        border-radius: 12px 12px 0 0 !important;
        padding: 1rem 1.5rem;
        font-weight: 600;
    }

    .card-body {
        padding: 1.5rem;
    }

    .card-footer {
        background-color: var(--modern-light);
        border-top: 1px solid var(--modern-border);
        border-radius: 0 0 12px 12px !important;
    }

    /* Link Styles */
    .link-modern {
        color: var(--modern-primary);
        text-decoration: none;
        font-weight: 500;
        transition: all 0.2s ease;
    }

    .link-modern:hover {
        color: var(--modern-accent);
        text-decoration: underline;
    }

    /* Form Styles */
    .form-control {
        border: 2px solid var(--modern-border);
        border-radius: 8px;
        padding: 0.75rem 1rem;
        transition: all 0.2s ease;
        font-size: 0.95rem;
    }

    .form-control:focus {
        border-color: var(--modern-primary);
        box-shadow: 0 0 0 0.2rem rgba(124, 58, 237, 0.25);
        outline: none;
    }

    .form-label {
        font-weight: 600;
        color: var(--modern-dark);
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
    }

    /* Alert Styles */
    .alert {
        border-radius: 8px;
        border: none;
        padding: 1rem 1.25rem;
        font-weight: 500;
    }

    .alert-success {
        background-color: #d1fae5;
        color: #065f46;
    }

    .alert-warning {
        background-color: #fef3c7;
        color: #92400e;
    }

    .alert-danger {
        background-color: #fee2e2;
        color: #991b1b;
    }

    .alert-info {
        background-color: #dbeafe;
        color: #1e40af;
    }

    /* Modal Styles */
    .modal-content {
        border-radius: 12px;
        border: none;
        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }

    .modal-header {
        background: linear-gradient(135deg, var(--modern-gradient-start) 0%, var(--modern-gradient-end) 100%);
        color: white;
        border-bottom: none;
        border-radius: 12px 12px 0 0;
        padding: 1.5rem;
    }

    .modal-title {
        font-weight: 700;
        font-size: 1.25rem;
    }

    .modal-body {
        padding: 1.5rem;
    }

    .modal-footer {
        background-color: var(--modern-light);
        border-top: 1px solid var(--modern-border);
        border-radius: 0 0 12px 12px;
        padding: 1rem 1.5rem;
    }

    /* Dropdown Styles */
    .dropdown-menu {
        border-radius: 8px;
        border: 1px solid var(--modern-border);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        padding: 0.5rem;
    }

    .dropdown-item {
        border-radius: 6px;
        padding: 0.5rem 1rem;
        transition: all 0.2s ease;
        font-weight: 500;
    }

    .dropdown-item:hover {
        background-color: var(--modern-light);
        color: var(--modern-primary);
    }

    .dropdown-divider {
        border-color: var(--modern-border);
        margin: 0.5rem 0;
    }

    /* Table Styles */
    .table {
        border-collapse: separate;
        border-spacing: 0;
    }

    .table thead th {
        background: linear-gradient(135deg, var(--modern-gradient-start) 0%, var(--modern-gradient-end) 100%);
        color: white;
        border: none;
        font-weight: 600;
        text-transform: uppercase;
        font-size: 0.85rem;
        letter-spacing: 0.05em;
        padding: 1rem;
    }

    .table thead th:first-child {
        border-top-left-radius: 8px;
    }

    .table thead th:last-child {
        border-top-right-radius: 8px;
    }

    .table tbody tr {
        transition: all 0.2s ease;
    }

    .table tbody tr:hover {
        background-color: var(--modern-light);
        transform: scale(1.01);
    }

    .table tbody td {
        padding: 1rem;
        border-bottom: 1px solid var(--modern-border);
    }

    /* Badge Styles */
    .badge {
        padding: 0.35rem 0.75rem;
        border-radius: 6px;
        font-weight: 600;
        font-size: 0.85rem;
    }

    .badge-primary {
        background-color: var(--modern-primary);
        color: white;
    }

    .badge-secondary {
        background-color: var(--modern-secondary);
        color: white;
    }

    /* Pagination Styles */
    .pagination {
        margin: 2rem 0;
    }

    .pagination .page-link {
        color: var(--modern-primary);
        border: 2px solid var(--modern-border);
        border-radius: 6px;
        margin: 0 0.25rem;
        padding: 0.5rem 1rem;
        font-weight: 600;
        transition: all 0.2s ease;
    }

    .pagination .page-link:hover {
        background-color: var(--modern-primary);
        border-color: var(--modern-primary);
        color: white;
        transform: translateY(-2px);
    }

    .pagination .page-item.active .page-link {
        background-color: var(--modern-primary);
        border-color: var(--modern-primary);
        color: white;
    }

    /* Container Styles */
    .container {
        max-width: 1200px;
    }

    /* Border Bottom Styles */
    .border-bottom {
        border-bottom: 2px solid var(--modern-border) !important;
        padding-bottom: 1rem;
        margin-bottom: 1.5rem;
    }

    /* Utility Classes */
    .text-modern-primary {
        color: var(--modern-primary);
    }

    .text-modern-secondary {
        color: var(--modern-secondary);
    }

    .bg-modern-light {
        background-color: var(--modern-light);
    }

    .bg-modern-gradient {
        background: linear-gradient(135deg, var(--modern-gradient-start) 0%, var(--modern-gradient-end) 100%);
    }

    /* Shadow Utilities */
    .shadow-modern {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    }

    .shadow-modern-lg {
        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }

    /* Smooth Transitions */
    * {
        transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* Focus Styles for Accessibility */
    *:focus {
        outline: 2px solid var(--modern-primary);
        outline-offset: 2px;
    }

    /* Button Group Styles */
    .btn-group .btn {
        border-radius: 8px;
    }

    .btn-group .btn:not(:last-child) {
        border-top-right-radius: 0;
        border-bottom-right-radius: 0;
    }

    .btn-group .btn:not(:first-child) {
        border-top-left-radius: 0;
        border-bottom-left-radius: 0;
    }

    /* Breadcrumb Styles */
    .breadcrumb {
        background-color: transparent;
        padding: 0;
        margin-bottom: 1.5rem;
    }

    .breadcrumb-item a {
        color: var(--modern-primary);
        text-decoration: none;
        font-weight: 500;
    }

    .breadcrumb-item a:hover {
        color: var(--modern-accent);
        text-decoration: underline;
    }

    .breadcrumb-item.active {
        color: var(--modern-text-secondary);
    }

    /* Progress Bar Styles */
    .progress {
        height: 1rem;
        border-radius: 8px;
        background-color: var(--modern-light);
    }

    .progress-bar {
        background: linear-gradient(135deg, var(--modern-gradient-start) 0%, var(--modern-gradient-end) 100%);
        border-radius: 8px;
    }

    /* List Group Styles */
    .list-group-item {
        border: 1px solid var(--modern-border);
        padding: 1rem 1.25rem;
        transition: all 0.2s ease;
    }

    .list-group-item:first-child {
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;
    }

    .list-group-item:last-child {
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;
    }

    .list-group-item:hover {
        background-color: var(--modern-light);
        transform: translateX(4px);
    }

    .list-group-item.active {
        background-color: var(--modern-primary);
        border-color: var(--modern-primary);
    }
