<nav class="topNav">
    <button class="ham">
      <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16" />
      </svg>
    </button>
  </nav>
  <div class="overlay"></div>
  <nav class="sideNav">
    <button class="menuX">
      <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
      </svg>
    </button>
    <ul>
      <li><a class="menuLink" href="#home">Home</a></li>
      <li><a class="menuLink" href="#profile">Profile</a></li>
      <li><a class="menuLink" href="#about">About</a></li>
      <li><a class="menuLink" href="#contacts">Contacts</a></li>
    </ul>
  </nav>
  <main>
    <section id="home">Home</section>
    <section id="profile">Profile</section>
    <section id="about">About</section>
    <section id="contacts">Contacts</section>
  </main>

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

html {
  scroll-behavior: smooth;
}

.topNav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 3rem;
  display: flex;
  align-items: center;
  background-color: #000000;
}

.ham {
  position: relative;
  width: 2rem;
  height: 2rem;
  margin-left: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: white;
}

.menuX {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 2rem;
  height: 2rem;
  margin-left: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: white;
}

.sideNav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 101;
  background: black;
  width: 300px;
  height: 100vh;
  overflow: hidden;
  color: white;
  /* hide the menu above the screen by default */
  transform: translateX(-100%);
  transition: transform 0.2s ease;
}

.showNav {
  transform: translateX(0);
}

.sideNav ul {
  width: 100%;
  height: 100%;
  list-style: none;
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
  padding-top: 5rem;
}

.sideNav ul li a {
  display: block;
  color: white;
  padding-bottom: 10px;
  margin-top: 1rem;
  border-bottom: 2px solid black;
  text-decoration: none;
  font-family: 'Open Sans', sans-serif;
  font-size: 1.2rem;
}

.sideNav ul li a:hover, .sideNav ul li a:focus {
  border-bottom: 2px solid white;
}

.overlay {
  position: fixed;
  display: none;
  z-index: 100;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  width: 100%;
  height: 100vh;
}

.showOverlay {
  display: block;
}

section {
  width: 100%;
  height: 100vh;
  display: flex;
  font-size: xx-large;
  justify-content: center;
  align-items: center;
}

section:nth-child(even) {
  background-color: rgb(245, 245, 245);
}

const sideNav = document.querySelector(".sideNav")
const overlay = document.querySelector(".overlay")
const ham = document.querySelector(".ham")
const menuX = document.querySelector(".menuX")
const menuItems = document.querySelectorAll(".menuLink")

menuItems.forEach(menuItem => {
  menuItem.addEventListener("click", toggleHamburger)
})

ham.addEventListener("click", toggleHamburger)
menuX.addEventListener("click", toggleHamburger)
overlay.addEventListener("click", toggleHamburger)

function toggleHamburger() {
  overlay.classList.toggle("showOverlay")
  sideNav.classList.toggle("showNav")
}