* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        header {
            background: #333;
            color: #fff;
            padding: 1rem 0;
        }
        nav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        nav ul {
            list-style: none;
            display: flex;
            gap: 20px;
        }
        nav a {
            color: #fff;
            text-decoration: none;
            padding: 5px 10px;
            border-radius: 3px;
        }
        nav a:hover {
            background: #555;
        }
        main {
            flex: 1;
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
            width: 100%;
        }
        footer {
            background: #333;
            color: #fff;
            text-align: center;
            padding: 20px;
            margin-top: auto;
        }