<header class="cd-header">
    <div class="header-wrapper">
      <div class="logo-wrap">
        <a href="#" class="hover-target"><span>your</span>logo</a>
      </div>
      <div class="nav-but-wrap">
        <div class="menu-icon hover-target">
          <span class="menu-icon__line menu-icon__line-left"></span>
          <span class="menu-icon__line"></span>
          <span class="menu-icon__line menu-icon__line-right"></span>
        </div>          
      </div>          
    </div>        
  </header>

  <div class="nav">
    <div class="nav__content">
      <ul class="nav__list">
        <li class="nav__list-item active-nav"><a href="#" class="hover-target">home</a></li>
        <li class="nav__list-item"><a href="#" class="hover-target">studio</a></li>
        <li class="nav__list-item"><a href="#" class="hover-target">news</a></li>
        <li class="nav__list-item"><a href="#" class="hover-target">contact</a></li>
      </ul>
    </div>
  </div>    

  <div class="section full-height over-hide"> 
    <div class="switch-wrap">
      <h1>overlay menu</h1>
      <div id="switch" class="hover-target">
        <div id="circle"></div>
      </div>
      <p><span>dark</span> - <span>light</span></p>
    </div>
  </div>  
  
  <div class='cursor' id="cursor"></div>
  <div class='cursor2' id="cursor2"></div>
  <div class='cursor3' id="cursor3"></div>

<!-- Link to page
================================================== -->

<a href="https://front.codes/" class="link-to-portfolio hover-target" target=”_blank”></a>


/* Please ❤ this if you like it! */


@import url('https://fonts.googleapis.com/css?family=Montserrat:100,100i,200,200i,300,300i,400,400i,500,500i,600,600i,700,700i,800,800i,900,900i');

body{
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  font-size: 15px;
  line-height: 1.7;
  color: #c4c3ca;
  background-color: #1f2029;
  overflow-x: hidden;
  -webkit-transition: all 300ms linear;
  transition: all 300ms linear;
}
a {
  cursor: pointer;
}
a:hover {
  text-decoration: none;
}

/* #Cursor
================================================== */

.cursor,
.cursor2,
.cursor3{
  position: fixed;
  border-radius: 50%; 
  transform: translateX(-50%) translateY(-50%);
  pointer-events: none;
  left: -100px;
  top: 50%;
  mix-blend-mode: difference;
  -webkit-transition: all 300ms linear;
  transition: all 300ms linear;
}
.cursor{
  background-color: #fff;
  height: 0;
  width: 0;
  z-index: 99999;
}
.cursor2,.cursor3{
  height: 36px;
  width: 36px;
  z-index:99998;
  -webkit-transition:all 0.3s ease-out;
  transition:all 0.3s ease-out
}
.cursor2.hover,
.cursor3.hover{
  -webkit-transform:scale(2) translateX(-25%) translateY(-25%);
  transform:scale(2) translateX(-25%) translateY(-25%);
  border:none
}
.cursor2{
  border: 2px solid #fff;
  box-shadow: 0 0 22px rgba(255, 255, 255, 0.6);
}
.cursor2.hover{
  background: rgba(255,255,255,1);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.2);
}

@media screen and (max-width: 1200px){
  .cursor,.cursor2,.cursor3{
    display: none
  }
}

/* #Primary style
================================================== */

.section {
    position: relative;
  width: 100%;
  display: block;
}
.over-hide{
  overflow: hidden;
}
.full-height {
  height: 100vh;
}

/* #Navigation
================================================== */
 
.cd-header{
    position: fixed;
  width:100%;
  top:0;
  left:0;
  z-index:100;
} 
.header-wrapper{
    position: relative;
  width: calc(100% - 100px);
  margin-left: 50px;
} 
.logo-wrap {
  position: absolute;
  display:block;
  left:0;
  top: 40px;
  cursor: pointer;
}
.logo-wrap a {
  cursor: pointer;
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: 20px;
  line-height: 20px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #fff;
  transition : all 0.3s ease-out;
}
.logo-wrap a span{ 
  color: #8167a9;
}
.logo-wrap a:hover {
  opacity: 0.9;
}
.nav-but-wrap{ 
  position: relative;
  display: inline-block;
  float: right;
  padding-left: 15px;
  padding-top: 15px;
  margin-top: 26px;
  transition : all 0.3s ease-out;
}
.menu-icon {
  height: 30px;
  width: 30px;
  position: relative;
  z-index: 2;
  cursor: pointer;
  display: block;
}
.menu-icon__line {
  height: 2px;
  width: 30px;
  display: block;
  background-color: #fff;
  margin-bottom: 7px;
  cursor: pointer;
  -webkit-transition: background-color .5s ease, -webkit-transform .2s ease;
  transition: background-color .5s ease, -webkit-transform .2s ease;
  transition: transform .2s ease, background-color .5s ease;
  transition: transform .2s ease, background-color .5s ease, -webkit-transform .2s ease;
}
.menu-icon__line-left {
  width: 16.5px;
  -webkit-transition: all 200ms linear;
  transition: all 200ms linear;
}
.menu-icon__line-right {
  width: 16.5px;
  float: right;
  -webkit-transition: all 200ms linear;
  -moz-transition: all 200ms linear;
  -o-transition: all 200ms linear;
  -ms-transition: all 200ms linear;
  transition: all 200ms linear;
}
.menu-icon:hover .menu-icon__line-left,
.menu-icon:hover .menu-icon__line-right {
  width: 30px;
}
.nav {
  position: fixed;
  z-index: 98;
}
.nav:before, .nav:after {
  content: "";
  position: fixed;
  width: 100vw;
  height: 100vh;
  background: rgba(20, 21, 26,0.6);
  border-bottom-left-radius: 200%;
  z-index: -1;
  -webkit-transition: -webkit-transform cubic-bezier(0.77, 0, 0.175, 1) 0.6s, border-radius linear 0.8s;
  transition: -webkit-transform cubic-bezier(0.77, 0, 0.175, 1) 0.6s, border-radius linear 0.8s;
  transition: transform cubic-bezier(0.77, 0, 0.175, 1) 0.6s, border-radius linear 0.8s;
  transition: transform cubic-bezier(0.77, 0, 0.175, 1) 0.6s, -webkit-transform cubic-bezier(0.77, 0, 0.175, 1) 0.6s, border-radius linear 0.8s;
  -webkit-transform: translateX(100%) translateY(-100%);
          transform: translateX(100%) translateY(-100%);
}
.nav:after {
  background: rgba(9,9,12,1);
  -webkit-transition-delay: 0s;
          transition-delay: 0s;
}
.nav:before {
  -webkit-transition-delay: .2s;
          transition-delay: .2s;
}
.nav__content {
  position: fixed;
  visibility: hidden;
  top: 50%;
  margin-top: 20px;
  -webkit-transform: translate(0%, -50%);
          transform: translate(0%, -50%);
  width: 100%;
  text-align: center;
}
.nav__list {
  position: relative;
  padding: 0;
  margin: 0;
  z-index: 2;
}
.nav__list-item {
  position: relative;
  display: block;
  -webkit-transition-delay: 0.8s;
          transition-delay: 0.8s;
  opacity: 0;
  text-align: center;
  color: #fff;
  overflow: hidden; 
  font-family: 'Montserrat', sans-serif;
  font-size: 8vh;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 3px;
  -webkit-transform: translate(100px, 0%);
          transform: translate(100px, 0%);
  -webkit-transition: opacity .2s ease, -webkit-transform .3s ease;
  transition: opacity .2s ease, -webkit-transform .3s ease;
  transition: opacity .2s ease, transform .3s ease;
  transition: opacity .2s ease, transform .3s ease, -webkit-transform .3s ease;
  margin-top: 0;
  margin-bottom: 0;
}
.nav__list-item a{ 
  position: relative;
  text-decoration: none;
  color: rgba(255,255,255,0.6);
  overflow: hidden; 
  cursor: pointer;
  padding-left: 5px;
  padding-right: 5px;
  font-weight: 900;
  z-index: 2;
  display: inline-block;
  text-transform: uppercase;
    -webkit-transition: all 200ms linear;
    transition: all 200ms linear; 
}
.nav__list-item a:after{ 
  position: absolute;
  content: '';
  top: 50%;
  margin-top: -2px;
  left: 50%;
  width: 0;
  height: 0;
  opacity: 0;
  background-color: #8167a9;
  z-index: 1;
    -webkit-transition: all 200ms linear;
    transition: all 200ms linear; 
}
.nav__list-item a:hover:after{ 
  height: 4px;
  opacity: 1;
  left: 0;
  width: 100%;
}
.nav__list-item a:hover{
  color: rgba(255,255,255,1);
}
.nav__list-item.active-nav a{
  color: rgba(255,255,255,1);
}
.nav__list-item.active-nav a:after{ 
  height: 4px;
  opacity: 1;
  left: 0;
  width: 100%;
}
body.nav-active .nav__content {
  visibility: visible;
}
body.nav-active .menu-icon__line {
  background-color: #fff;
  -webkit-transform: translate(0px, 0px) rotate(-45deg);
          transform: translate(0px, 0px) rotate(-45deg);
}
body.nav-active .menu-icon__line-left {
  width: 15px;
  -webkit-transform: translate(2px, 4px) rotate(45deg);
          transform: translate(2px, 4px) rotate(45deg);
}
body.nav-active .menu-icon__line-right {
  width: 15px;
  float: right;
  -webkit-transform: translate(-3px, -3.5px) rotate(45deg);
          transform: translate(-3px, -3.5px) rotate(45deg);
}
body.nav-active .menu-icon:hover .menu-icon__line-left,
body.nav-active .menu-icon:hover .menu-icon__line-right {
  width: 15px;
}
body.nav-active .nav {
  visibility: visible;
}
body.nav-active .nav:before, body.nav-active .nav:after {
  -webkit-transform: translateX(0%) translateY(0%);
          transform: translateX(0%) translateY(0%);
  border-radius: 0;
}
body.nav-active .nav:after {
  -webkit-transition-delay: .1s;
          transition-delay: .1s;
}
body.nav-active .nav:before {
  -webkit-transition-delay: 0s;
          transition-delay: 0s;
}
body.nav-active .nav__list-item {
  opacity: 1;
  -webkit-transform: translateX(0%);
          transform: translateX(0%);
  -webkit-transition: opacity .3s ease, color .3s ease, -webkit-transform .3s ease;
  transition: opacity .3s ease, color .3s ease, -webkit-transform .3s ease;
  transition: opacity .3s ease, transform .3s ease, color .3s ease;
  transition: opacity .3s ease, transform .3s ease, color .3s ease, -webkit-transform .3s ease;
}
body.nav-active .nav__list-item:nth-child(0) {
  -webkit-transition-delay: 0.7s;
          transition-delay: 0.7s;
}
body.nav-active .nav__list-item:nth-child(1) {
  -webkit-transition-delay: 0.8s;
          transition-delay: 0.8s;
}
body.nav-active .nav__list-item:nth-child(2) {
  -webkit-transition-delay: 0.9s;
          transition-delay: 0.9s;
}
body.nav-active .nav__list-item:nth-child(3) {
  -webkit-transition-delay: 1s;
          transition-delay: 1s;
}
body.nav-active .nav__list-item:nth-child(4) {
  -webkit-transition-delay: 1.1s;
          transition-delay: 1.1s;
}
body.nav-active .nav__list-item:nth-child(5) {
  -webkit-transition-delay: 1.2s;
          transition-delay: 1.2s;
}
body.nav-active .nav__list-item:nth-child(6) {
  -webkit-transition-delay: 1.3s;
          transition-delay: 1.3s;
}
body.nav-active .nav__list-item:nth-child(7) {
  -webkit-transition-delay: 1.4s;
          transition-delay: 1.4s;
}
body.nav-active .nav__list-item:nth-child(8) {
  -webkit-transition-delay: 1.5s;
          transition-delay: 1.5s;
}
body.nav-active .nav__list-item:nth-child(9) {
  -webkit-transition-delay: 1.6s;
          transition-delay: 1.6s;
}
body.nav-active .nav__list-item:nth-child(10) {
  -webkit-transition-delay: 1.7s;
          transition-delay: 1.7s;
}

.switch-wrap {
  position: absolute;
  top: 50%;
  left: 0;
  z-index: 10;
    transform: translateY(-50%);
  width: 100%;
  -webkit-transition: all 500ms linear;
  transition: all 500ms linear; 
  margin: 0 auto;
  text-align: center;
}
.switch-wrap h1 {
  font-weight: 900;
  font-size: 46px;
  line-height: 1;
  color: #fff;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 40px;
  -webkit-transition: all 300ms linear;
  transition: all 300ms linear; 
}
@media screen and (max-width: 580px){
  .switch-wrap h1 {
    font-size: 32px;
  }
}
.switch-wrap p {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 1px;
  line-height: 1;
  color: #8167a9;
  text-align: center;
  margin-top: 15px;
}
.switch-wrap p span {
  position: relative;
}
.switch-wrap p span:before {
  position: absolute;
  content: '';
  width: 100%;
  height: 2px;
  background-color: #fff;
  left: 0;
  bottom: -4px;
  -webkit-transition: all 300ms linear;
  transition: all 300ms linear; 
}
.switch-wrap p span:nth-child(2):before {
  opacity: 0;
}
#switch,
#circle {
  cursor: pointer;
  -webkit-transition: all 300ms linear;
  transition: all 300ms linear; 
} 
#switch {
  width: 60px;
  height: 8px;
  margin: 0 auto;
  text-align: center;
  border: 2px solid #000;
  border-radius: 27px;
  background: #8167a9;
  position: relative;
  display: inline-block;
}
#circle {
  position: absolute;
  top: -11px;
  left: -13px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  box-shadow: 0 4px 4px rgba(26,53,71,0.25), 0 0 0 1px rgba(26,53,71,0.07);
  background: #fff;
}
.switched {
  border-color: #8167a9 !important;
  background: #000 !important;
}
.switched #circle {
  left: 43px;
  background: #000;
}

/* #Light
================================================== */

body.light{
  background-color: #fff;
}
body.light .cursor,
body.light .cursor2,
body.light .cursor3{
  mix-blend-mode: normal;
}
body.light .cursor2{
  border: 2px solid #1f2029;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.1);
}
body.light .cursor2.hover{
  background: rgba(0,0,0,0.06);
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.1);
  border-color: transparent;
}
body.light .logo-wrap a {
  color: #1f2029;
}
body.light .menu-icon__line {
  background-color: #1f2029;
}
body.light .nav:before {
  background: rgba(235, 235, 235,0.6);
}
body.light .nav:after {
  background: rgba(250,250,250,1);
}
body.light .nav__list-item a{ 
  color: rgba(0,0,0,0.6); 
}
body.light .nav__list-item a:hover{
  color: #1f2029;
}
body.light .nav__list-item.active-nav a{
  color: #1f2029;
}
body.light .switch-wrap h1 {
  color: #000;
}
body.light .switch-wrap p span:nth-child(2):before {
  opacity: 1;
  background-color: #000;
}
body.light .switch-wrap p span:nth-child(1):before {
  opacity: 0;
}

/* #Link to page
================================================== */

.link-to-portfolio {
    position: fixed;
    bottom: 40px;
    right: 50px;
    z-index: 200;
    cursor: pointer;
    width: 50px;
    height: 50px;
    text-align: center;
    border-radius: 3px;
    background-position: center center;
    background-size: 65%;
  background-repeat: no-repeat;
    background-image: url('https://assets.codepen.io/1462889/fcy.png');
    box-shadow: 0 0 0 2px rgba(255,255,255,.1);
    transition: opacity .2s, border-radius .2s, box-shadow .2s;
    transition-timing-function: ease-out;
}
.link-to-portfolio:hover {
    opacity: 0.8;
    border-radius: 50%;
    box-shadow: 0 0 0 20px rgba(255,255,255,.1);
}


/* Please ❤ this if you like it! */


(function($) { "use strict";
    
  //Page cursors

    document.getElementsByTagName("body")[0].addEventListener("mousemove", function(n) {
        t.style.left = n.clientX + "px", 
    t.style.top = n.clientY + "px", 
    e.style.left = n.clientX + "px", 
    e.style.top = n.clientY + "px", 
    i.style.left = n.clientX + "px", 
    i.style.top = n.clientY + "px"
    });
    var t = document.getElementById("cursor"),
        e = document.getElementById("cursor2"),
        i = document.getElementById("cursor3");
    function n(t) {
        e.classList.add("hover"), i.classList.add("hover")
    }
    function s(t) {
        e.classList.remove("hover"), i.classList.remove("hover")
    }
    s();
    for (var r = document.querySelectorAll(".hover-target"), a = r.length - 1; a >= 0; a--) {
        o(r[a])
    }
    function o(t) {
        t.addEventListener("mouseover", n), t.addEventListener("mouseout", s)
    }
  
  //Navigation

  var app = function () {
    var body = undefined;
    var menu = undefined;
    var menuItems = undefined;
    var init = function init() {
      body = document.querySelector('body');
      menu = document.querySelector('.menu-icon');
      menuItems = document.querySelectorAll('.nav__list-item');
      applyListeners();
    };
    var applyListeners = function applyListeners() {
      menu.addEventListener('click', function () {
        return toggleClass(body, 'nav-active');
      });
    };
    var toggleClass = function toggleClass(element, stringClass) {
      if (element.classList.contains(stringClass)) element.classList.remove(stringClass);else element.classList.add(stringClass);
    };
    init();
  }();

  
  //Switch light/dark
  
  $("#switch").on('click', function () {
    if ($("body").hasClass("light")) {
      $("body").removeClass("light");
      $("#switch").removeClass("switched");
    }
    else {
      $("body").addClass("light");
      $("#switch").addClass("switched");
    }
  });
  
})(jQuery); 

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js