body {
            margin: 0;
            padding: 0;
            background-color: #f4f4f9;
        }

        .grid-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            grid-gap: 20px;
            padding: 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .grid-item {
            background-color: #ffffff;
            border: 1px solid #ddd;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            padding: 20px;
            text-align: center;
            font-size: 16px;
            font-weight: bold;
            color: #081529;
        }

        @media (max-width: 768px) {
            .grid-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .grid-container {
                grid-template-columns: 1fr;
            }
        }