body {
            background-color: #f4f7fa;
            font-family: 'Roboto', Arial, sans-serif;
            color: #333;
        }
        .container {
            padding: 40px 20px;
            max-width: 1200px;
            margin: auto;
        }
        .header {
            text-align: center;
            margin-bottom: 40px;
        }
        .header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: #1a3c87;
        }
        .header p {
            font-size: 1.2rem;
            color: #666;
        }
        .flex-container {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }
        .card {
            width: 100%;
            max-width: 300px;
            border: none;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }
        .card-body {
            padding: 20px;
            text-align: center;
        }
        .card-icon {
            font-size: 2.5rem;
            color: #1a3c87;
            margin-bottom: 15px;
        }
        .card-title {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1a3c87;
            margin-bottom: 10px;
        }
        .card-text {
            font-size: 1rem;
            color: #555;
            margin-bottom: 15px;
        }
        .btn-primary {
            background-color: #1a3c87;
            border-color: #1a3c87;
            border-radius: 8px;
            padding: 10px 20px;
            font-weight: 500;
            transition: background-color 0.3s ease;
        }
        .btn-primary:hover {
            background-color: #153068;
            border-color: #153068;
        }
        footer {
            text-align: center;
            padding: 20px 0;
            margin-top: 40px;
            background-color: #e9ecef;
            color: #666;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .card {
                max-width: 100%;
            }
            .header h1 {
                font-size: 2rem;
            }
            .header p {
                font-size: 1rem;
            }
        }