* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            background-color: #0d0d18;
            padding: 20px;
        }
        header {
            background-color: #333;
            color: #fff;
            padding: 10px 0;
            text-align: center;
        }
        header h1 {
            margin-bottom: 10px;
        }
        nav ul {
            list-style-type: none;
        }
        nav ul li {
            display: inline;
            margin-right: 20px;
        }
        nav ul li a {
            color: #fff;
            text-decoration: none;
        }
        nav ul li a:hover {
            text-decoration: underline;
        }
        section {
            background-color: #fff;
            margin: 20px 0;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }
        h3 {
            color: #333;
        }
        footer {
            text-align: center;
            margin-top: 20px;
            padding: 10px;
            background-color: #333;
            color: #fff;
        }