body {
            margin: 0;
            font-family: Arial, sans-serif;
        }

        header {
            background-color: #fff;
            padding: 10px;
            text-align: center;
        }

        header img {
            max-width: 100%;
            height: auto;
        }

        nav {
            display: flex;
            justify-content: center;
            background-color: #000;
            padding: 5px;
        }

        nav a {
            color: white;
            text-decoration: none;
            padding: 10px;
            margin: 0 10px;
        }

        @media (max-width: 600px) {
            nav {
                flex-direction: column;
            }
        }