<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Responsive Navigation Menu</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        .nav-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #007bff;
            padding: 10px 20px;
            color: white;
        }
        .nav-bar h1 {
            margin: 0;
        }
        .nav-links {
            display: flex;
            gap: 15px;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-size: 1em;
        }
        .nav-links a:hover {
            text-decoration: underline;
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }
        .menu-toggle div {
            width: 25px;
            height: 3px;
            background-color: white;
            margin: 3px 0;
        }
        .nav-menu {
            display: flex;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                position: absolute;
                top: 50px;
                left: 0;
                background-color: #007bff;
                z-index: 1;
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
        }
    </style>
</head>
<body>
    <header class="nav-bar">
        <h1>My Website</h1>
        <div class="menu-toggle" onclick="toggleMenu()">
            <div></div>
            <div></div>
            <div></div>
        </div>
        <nav class="nav-links">
            <a href="#">Home</a>
            <a href="#">About</a>
            <a href="#">Services</a>
            <a href="#">Contact</a>
        </nav>
    </header>

    <script>
        function toggleMenu() {
            const navLinks = document.querySelector('.nav-links');
            navLinks.classList.toggle('active');
        }
    </script>
</body>
</html>