:root {
            --primary-color: #3498db;
            --secondary-color: #2980b9;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --success-color: #2ecc71;
            --danger-color: #e74c3c;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f5f7fa;
            color: #333;
        }
        
        .container-main {
            max-width: 1200px;
            margin: 20px auto;
            padding: 20px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0,0,0,0.1);
        }
        
        .page-header {
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 10px;
            margin-bottom: 30px;
            color: var(--dark-color);
        }
        
        .search-box {
            margin-bottom: 20px;
        }
        
        .search-box input {
            border-radius: 20px;
            padding: 10px 15px;
            border: 1px solid #ddd;
            transition: all 0.3s;
        }
        
        .search-box input:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
        }
        
        .table {
            border-radius: 8px;
            overflow: hidden;
        }
        
        .table thead {
            background-color: var(--primary-color);
            color: white;
        }
        
        .table th {
            padding: 15px;
            text-align: left;
        }
        
        .table td {
            padding: 12px 15px;
            vertical-align: middle;
        }
        
        .table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        
        .table tr:hover {
            background-color: #e9f7fe;
        }
        
        .btn-action {
            border-radius: 20px;
            padding: 5px 15px;
            font-size: 14px;
            transition: all 0.3s;
            border: none;
        }
        
        .btn-edit {
            background-color: var(--primary-color);
            color: white;
        }
        
        .btn-edit:hover {
            background-color: var(--secondary-color);
        }
        
        .btn-delete {
            background-color: var(--danger-color);
            color: white;
        }
        
        .btn-delete:hover {
            background-color: #c0392b;
        }
        
        .no-results {
            text-align: center;
            padding: 20px;
            color: #777;
            font-style: italic;
        }