body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0 20px;
            background-color: #f9f9f9;
            color: #333;
        }
        h1, h2, h3 {
            color: #222;
        }
        a {
            color: #0073e6;
            text-decoration: none;
        }
        a:hover {
            text-decoration: underline;
        }
        nav {
            background-color: #fff;
            padding: 15px 20px;
            margin-bottom: 20px;
            border-bottom: 1px solid #ddd;
        }
        nav ul {
            list-style: none;
            padding: 0;
        }
        nav ul li {
            display: inline-block;
            margin-right: 15px;
        }
        section {
            margin-bottom: 40px;
            background-color: #fff;
            padding: 20px;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }