Animated Hamburger Menu in CSS

<script type="module" src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.esm.js"></script>
<script nomodule src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.js"></script>

<!-- Navigation -->
<nav>
  <div class="logo">
    <ion-icon name="rocket-outline"></ion-icon>
    <span>MenuApp</span>
  </div>
  <div class="hamburger" onclick="toggleMenu()">
    <span></span>
    <span></span>
    <span></span>
  </div>
</nav>

<!-- Menu Overlay -->
<div class="menu-overlay" id="menuOverlay">
  <ul class="menu-items">
    <li><a href="#"><ion-icon name="home-outline"></ion-icon> Home</a></li>
    <li><a href="#"><ion-icon name="grid-outline"></ion-icon> Services</a></li>
    <li><a href="#"><ion-icon name="briefcase-outline"></ion-icon> Portfolio</a></li>
    <li><a href="#"><ion-icon name="people-outline"></ion-icon> About Us</a></li>
    <li><a href="#"><ion-icon name="newspaper-outline"></ion-icon> Blog</a></li>
    <li><a href="#"><ion-icon name="mail-outline"></ion-icon> Contact</a></li>
  </ul>

  <div class="menu-footer">
    <div class="social-links">
      <a href="#"><ion-icon name="logo-twitter"></ion-icon></a>
      <a href="#"><ion-icon name="logo-linkedin"></ion-icon></a>
      <a href="#"><ion-icon name="logo-instagram"></ion-icon></a>
      <a href="#"><ion-icon name="logo-github"></ion-icon></a>
    </div>
    <p>© 2025 MenuApp. All rights reserved.</p>
  </div>
</div>

<!-- Main Content -->
<main>
  <div class="hero">
    <h1>Animated Hamburger Menu</h1>
    <p>Click the hamburger icon to reveal a smooth, professional slide-in menu with animated items</p>
  </div>

  <div class="features">
    <div class="feature-card">
      <ion-icon name="color-palette-outline"></ion-icon>
      <h3>Custom Color</h3>
      <p>Using #001233 for elegant dark theme</p>
    </div>
    <div class="feature-card">
      <ion-icon name="flash-outline"></ion-icon>
      <h3>Smooth Animation</h3>
      <p>CSS transitions for professional feel</p>
    </div>
    <div class="feature-card">
      <ion-icon name="phone-portrait-outline"></ion-icon>
      <h3>Responsive Design</h3>
      <p>Works perfectly on all devices</p>
    </div>
  </div>
</main>

   * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f8f9fa;
        }

        /* Navigation Bar */
        nav {
            background: white;
            padding: 1.25rem 2rem;
            box-shadow: 0 2px 10px rgba(0, 18, 51, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #001233;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo ion-icon {
            font-size: 1.75rem;
        }

        /* Hamburger Button */
        .hamburger {
            width: 30px;
            height: 24px;
            position: relative;
            cursor: pointer;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            position: absolute;
            height: 3px;
            width: 100%;
            background: #001233;
            border-radius: 3px;
            opacity: 1;
            left: 0;
            transition: all 0.3s ease;
        }

        .hamburger span:nth-child(1) {
            top: 0;
        }

        .hamburger span:nth-child(2) {
            top: 10px;
        }

        .hamburger span:nth-child(3) {
            top: 20px;
        }

        .hamburger.active span:nth-child(1) {
            top: 10px;
            transform: rotate(135deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
            left: -30px;
        }

        .hamburger.active span:nth-child(3) {
            top: 10px;
            transform: rotate(-135deg);
        }

        /* Menu Overlay */
        .menu-overlay {
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            max-width: 400px;
            height: 100vh;
            background: #001233;
            transition: right 0.4s ease;
            z-index: 999;
            padding: 6rem 2rem 2rem;
            overflow-y: auto;
        }

        .menu-overlay.active {
            right: 0;
        }

        /* Menu Items */
        .menu-items {
            list-style: none;
        }

        .menu-items li {
            margin-bottom: 1.5rem;
            opacity: 0;
            transform: translateX(50px);
            transition: all 0.3s ease;
        }

        .menu-overlay.active .menu-items li {
            opacity: 1;
            transform: translateX(0);
        }

        .menu-overlay.active .menu-items li:nth-child(1) {
            transition-delay: 0.1s;
        }

        .menu-overlay.active .menu-items li:nth-child(2) {
            transition-delay: 0.2s;
        }

        .menu-overlay.active .menu-items li:nth-child(3) {
            transition-delay: 0.3s;
        }

        .menu-overlay.active .menu-items li:nth-child(4) {
            transition-delay: 0.4s;
        }

        .menu-overlay.active .menu-items li:nth-child(5) {
            transition-delay: 0.5s;
        }

        .menu-overlay.active .menu-items li:nth-child(6) {
            transition-delay: 0.6s;
        }

        .menu-items a {
            color: white;
            text-decoration: none;
            font-size: 1.5rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .menu-items a ion-icon {
            font-size: 1.75rem;
        }

        .menu-items a:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(10px);
        }

        /* Menu Footer */
        .menu-footer {
            position: absolute;
            bottom: 2rem;
            left: 2rem;
            right: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            opacity: 0;
            transition: opacity 0.3s ease 0.7s;
        }

        .menu-overlay.active .menu-footer {
            opacity: 1;
        }

        .social-links {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .social-links a {
            color: white;
            font-size: 1.5rem;
            transition: all 0.3s ease;
        }

        .social-links a:hover {
            color: #64b5f6;
            transform: translateY(-3px);
        }

        .menu-footer p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
        }

        /* Main Content */
        main {
            margin-top: 5rem;
            padding: 2rem;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero {
            background: white;
            padding: 3rem;
            border-radius: 16px;
            box-shadow: 0 5px 20px rgba(0, 18, 51, 0.08);
            text-align: center;
        }

        .hero h1 {
            color: #001233;
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .hero p {
            color: #6c757d;
            font-size: 1.125rem;
            line-height: 1.6;
        }

        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 3px 15px rgba(0, 18, 51, 0.08);
            text-align: center;
            transition: transform 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
        }

        .feature-card ion-icon {
            font-size: 3rem;
            color: #001233;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            color: #001233;
            margin-bottom: 0.5rem;
        }

        .feature-card p {
            color: #6c757d;
            font-size: 0.925rem;
        }

  function toggleMenu() {
    const hamburger = document.querySelector('.hamburger');
    const menuOverlay = document.getElementById('menuOverlay');

    hamburger.classList.toggle('active');
    menuOverlay.classList.toggle('active');
  }

  // Close menu when clicking outside
  document.addEventListener('click', function(event) {
    const hamburger = document.querySelector('.hamburger');
    const menuOverlay = document.getElementById('menuOverlay');

    if (!hamburger.contains(event.target) && !menuOverlay.contains(event.target)) {
      hamburger.classList.remove('active');
      menuOverlay.classList.remove('active');
    }
  });