.admin-sidebar {
    background: #2c3e50;
    height: 100vh;
    padding-top: 20px;
}

.admin-sidebar .nav-link {
    color: #ecf0f1;
    padding: 12px 20px;
    border-left: 3px solid transparent;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    background: #34495e;
    border-left-color: #3190e8;
    color: #fff;
}

.admin-content {
    padding: 30px;
}

.page-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.page-header h2 {
    margin: 0;
    color: #333;
}

.data-table {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.data-table thead {
    background: #f8f9fa;
}

.data-table th {
    font-weight: 600;
    color: #333;
    border-bottom: 2px solid #dee2e6;
}

.data-table td {
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background-color: #f8f9fa;
}

.action-buttons .btn {
    margin: 0 2px;
}

.filter-bar {
    background: #fff;
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.filter-bar .form-group {
    margin-bottom: 0;
}

.badge-active {
    background-color: #28a745;
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.badge-inactive {
    background-color: #6c757d;
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.badge-teacher {
    background-color: #007bff;
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.badge-student {
    background-color: #28a745;
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.badge-admin {
    background-color: #dc3545;
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.pagination {
    margin-top: 20px;
    justify-content: center;
}

.pagination .page-link {
    border-radius: 4px;
    margin: 0 2px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-state .icon {
    font-size: 64px;
    margin-bottom: 20px;
}