<div class="container">
  
  <div class="headnav">
    
    <header class="header">
      
      <div class="header__logo">
        <img src="https://psmedia.playstation.com/is/image/psmedia/footerpslogo-nhasset?$Footer_Links_Row_Logo$" alt="Logo" />
      </div>
      
      <nav class="header__nav" role="navigation">
        <ul class="header__nav__list">
          <li class="header__nav__item">  
            <a href="#" class="header__nav__item__link">PS4</a>
          </li>
          <li class="header__nav__item">  
            <a href="#" class="header__nav__item__link">Jeux</a>
          </li>
          <li class="header__nav__item">  
            <a href="#" class="header__nav__item__link">PS Plus</a>
          </li>
          <li class="header__nav__item">  
            <a href="#" class="header__nav__item__link">News</a>
          </li>
          <li class="header__nav__item">  
            <a href="#" class="header__nav__item__link">PS Store</a>
          </li>
          <li class="header__nav__item">  
            <a href="#" class="header__nav__item__link">Aide</a>
          </li>
          <div class="header__nav__item--icons">
            <li class="header__nav__item header__nav__item--icon">  
              <a href="#" class="header__nav__item__link header__nav__item__link--icon">
                <img src="https://www.playstation.com/fr-fr/1.22.03/etc/designs/pdc/clientlibs_base/images/nav/avatar-default-2x.png"/>
              </a>
            </li>
            <li class="header__nav__item header__nav__item--icon">  
              <a href="#" class="header__nav__item__link header__nav__item__link--icon js-nav-search-open">
                <img src="https://www.playstation.com/fr-fr/1.22.03/etc/designs/pdc/clientlibs_base/images/searchbox/icon-magnifine-small-white-2x.png"/>
              </a>
            </li>
          </div>
        </ul>
        <div class="header__nav__search js-nav-search">
          <form action="#" class="header__nav__search__form">
            <input type="search" placeholder="Search" class="header__nav__search__form__text" autofocus/>
            <input type="submit" class="header__nav__search__form__submit" value="Rechercher"/>
          </form>
          <button class="header__nav__search__close js-nav-search-close"></button>
        </div>
      </nav>
      
      <button href="#" class="nav-toggle js-nav-toggle" title="navigation menu" aria-label="navigation menu" role="button" aria-controls="navigation" aria-expanded="false">
        <div class="nav-toggle__content">
          <div class="nav-toggle__close"></div>
          <div class="nav-toggle__open">menu</div>
        </div>
      </button>
      
    </header>
    
    <nav class="nav js-nav" role="first navigation">
      <ul class="nav__list">
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-ps4-01-eu-15dec15?$Icon$"/>
            </span>
            PS4
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-games-01-eu-15dec15?$Icon$"/>
            </span>
            Jeux
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-psplus-01-eu-15dec15?$Icon$"/>
            </span>
            Playstation Plus
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-news-01-eu-15dec15?$Icon$"/>
            </span>
            News
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-ps-store-01-eu-15dec15?$Icon$"/>
            </span>
            PS Store
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-help-01-eu-15dec15?$Icon$"/>
            </span>
            Aide
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://www.playstation.com/fr-fr/1.22.03/etc/designs/pdc/clientlibs_base/images/main-header/primarynav_icon_account.png"/>
            </span>
            Connexion
          </a>  
        </li>
        <li class="nav__item">
          <a href="#" class="nav__item__wrapper">
            <span class="nav__item__icon">
              <img src="https://psmedia.playstation.com/is/image/psmedia/meganav-icon-mobile-sitemap-01-eu-15dec15?$Icon$"/>
            </span>
            Plan du site
          </a>  
        </li>
      </ul>
    </nav>
    <nav class="nav--right js-second-nav">
      <p class="nav--right__content">I display the content of <span class="nav--right__content__child-name"></span></p>
    </nav>
    
  </div>
  
  <div class="content">
    <h3>Resize the viewport :)</h3>
  </div>
  
</div>
html {
  box-sizing: border-box;
}
*, *:before, *:after {
  box-sizing: inherit;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 5%;
  font-family: 'Raleway', sans-serif;
  background-color: rgba(0,0,0,0.6);
}

img {
  height: auto;
  max-width: 100%;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1 {
  color: white;
  text-align: center;
  margin-bottom: 3rem;
}

.hidden { display: none; }

//Params
$white: #FBFBFB;
$black: #2B2B2B;
$black-light: rgba(31, 31, 31, 0.98);
$blue: #08367E;
$blue-light: #04ABFF;
$grey: #363636;
$header-height: 3.75rem;
$nav-toggle-height: 3rem;
$side-icon-padding: .8rem;
$icon-width: 2rem;
$logo-width: 2rem;
$trans-bounce: all cubic-bezier(0.47, 0.07, 0.21, 1.4) .2s;
$breakpoint: 720px;

//Animation
@keyframes bounce {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes hoverIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

@keyframes hoverOut {
  from { transform: translateX(0); }
  to { transform: translateX(110%); }
}

.container {
  position: absolute;
  width: 90%;
  margin: 0 auto;
  height: 35rem;
  background-color: #022C87;
  overflow: hidden;
}

.header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 .8rem;
  height: $header-height;
  width: 100%;
  background-color: $black;
  background-image: linear-gradient(to bottom,#2b2b2b 0,#000001 100%);
  overflow: hidden;
  z-index: 2;
  
  @media screen and (min-width: $breakpoint) {
    justify-content: flex-start;
    & .nav-toggle {
      display: none;
    }
    
    & .header__nav {
      position: relative;
      display: flex;
    }
  } 
}

.header__logo {
  width: $logo-width;
  margin-right: $logo-width;
}

.header__nav { 
  display: none;
  height: 100%;
  
  @media screen and (min-width: $breakpoint) {
    width: calc(100% - #{$logo-width} * 2);
  } 
}

.header__nav__search {
  display: none;
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  background-color: $black;
  background-image: linear-gradient(to bottom,#2b2b2b 0,#000001 100%);
  align-items: center;
  
  &.is-active { display: flex; }
}

.header__nav__search__form {
  position: relative;
  display: flex;
  height: 2.375rem;
  width: calc(100% - 44px - .8rem);
  background-color: $grey;
}

.header__nav__search__form__text {
  width: 100%;
  height: 100%;
  background-color: transparent;
  border: none;
  outline: 0;
  padding-left: .8rem;
  color: white;
}

.header__nav__search__form__submit {
  position: absolute;
  top: 0;
  right: .8rem;
  height: 100%;
  width: 20px;
  background-image: url("https://www.playstation.com/fr-fr/1.22.03/etc/designs/pdc/clientlibs_base/images/searchbox/icon-magnifine-small-white-2x.png");
  background-repeat: no-repeat;
  background-color: transparent;
  background-size: 17px 17px;
  background-position: center center;
  border: 0;
  text-indent: -999px;
}

.header__nav__search__close {
  display: flex;
  height: 100%;
  width: 2.6875rem;
  margin-left: auto;
  border: none;
  background: url("https://www.playstation.com/fr-fr/1.22.03/etc/designs/pdc/clientlibs_base/images/nav/nav-sprite.png") center -33px no-repeat;
  background-size: cover;
  outline: 0;
}

.header__nav__list { 
  display: flex;
  height: 100%;
  width: 100%;
}

.header__nav__item {
  height: 100%;
  
  &:first-child { margin-left: 0; }
  &:last-child { margin-right: 0; }
}

.header__nav__item--icons { 
  display: flex;
  height: 100%;
  margin-left: auto;
}

.header__nav__item__link {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  height: 100%;
  padding: 0 .7rem;
  color: white;
  font-size: .8rem;
  text-transform: uppercase;
  text-decoration: none;
  overflow: hidden;
  
  &:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    display: block;
    width: 100%;
    height: 5px;
    background-color: $blue-light;
    transform: translateX(-100%);
    animation: hoverOut .3s cubic-bezier(.77,0,.175,1) both;
  }
  
  &:hover:after {
    animation: hoverIn .3s cubic-bezier(.77,0,.175,1) both;
  }
}

.header__nav__item__link--icon {
  img { width: 20px; }
  &:after { display: none; }
}

.nav-toggle {
  display: block;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background-color: $blue;
  padding: 0;
  text-transform: uppercase;
  color: white;
  font-size: .6rem;
  border: none;
  overflow: hidden;
  outline: 0;
  
  &.is-active {
    background-color: $blue-light;
    animation: bounce cubic-bezier(0.47, 0.07, 0.21, 1.6) .2s;
  }
}

.nav-toggle__content {
  display: flex;
  flex-direction: column;
  width: $nav-toggle-height;
  height: $nav-toggle-height * 2;
  transform: translateY(-$nav-toggle-height);
  transition: $trans-bounce;
  
  .nav-toggle.is-active & {
    transform: translateY(0);
  }
}

.nav-toggle__open,
.nav-toggle__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: $nav-toggle-height;
  height: $nav-toggle-height;
}

.nav-toggle__close {
  background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%229.938%22%20height%3D%229.913%22%20viewBox%3D%220%200%209.938%209.913%22%3E%3Cpath%20fill%3D%22%23fff%22%20d%3D%22M3.89%204.968L0%201.08%201.104%200l3.864%203.888L8.858%200l1.08%201.08-3.89%203.888%203.89%203.865-1.08%201.08-3.89-3.866-3.864%203.866L0%208.833l3.89-3.865z%22%2F%3E%3C%2Fsvg%3E');
  background-repeat: no-repeat;
  background-position: 50% 50%;
}

.nav {
  position: absolute;
  top: $header-height;
  left: 0;
  display: flex;
  flex-direction: column;
  height: calc(100% - #{$header-height});
  width: 100%;
  background-color: $black-light;
  transition: all ease-out .2s;
  transform: translateX(-100%);
  opacity: .1;
  
  &.is-open {
    opacity: 1;
    transform: translateX(0);
  }
}

.nav__list { 
  display: flex;
  flex-direction: column;
}

.nav__item {
  display: flex;
  width: 100%;
  opacity: 0;
  transform: translateX(-10px);
  transition: $trans-bounce;
  
  &:nth-child(n+6) {
    border-bottom: 2px solid #353535;
  }
  
  @for $i from 1 through 8 {
    .nav.is-open &:nth-child(#{$i}) {
      opacity: 1;
      transform: translateX(0);
      transition-delay: (1 - $i) * -0.05s;
    }
  }
}

.nav__item__wrapper {
  display: flex;
  align-items: center;
  padding: .5rem $side-icon-padding;
  width: 100%;
  height: 100%;
  color: white;
  text-shadow: 0 -1px 1px rgba(0,0,0,0.3); 
  text-decoration: none;
  
  & .nav__item__icon { opacity: .5; }
  &:active,
  &.is-selected .nav__item__icon { opacity: 1; }
  
  &:active,
  &.is-selected { background-image: linear-gradient(to bottom,#0089e2,#0067be); }
}

.nav__item__icon {
  width: 2rem;
  margin-right: $side-icon-padding;
  // Disable click events on img so that the item clicked
  // in the first menu has the is-selected class
  pointer-events: none;
}

.nav--right {
  position: absolute;
  top: $header-height;
  right: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: calc(100% - #{$header-height});
  width: calc(100% - (#{$icon-width} + #{$side-icon-padding} * 2));
  background-color: $blue;
  color: white;
  box-shadow: -2px 0 2px 0 rgba(0,0,0,0.75);
  transition: all ease-out .2s;
  transform: translateX(100%);
  opacity: .1;
  
  &.is-open {
    opacity: 1;
    transform: translateX(0);
  }
}

.content {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 80%;
  text-transform: uppercase;
  color: white;
}
View Compiled
var FirstCurtainMenu = {
  $el: $('.js-nav'),
  $elToggle: $('.js-nav-toggle'),
  $elSecondCurtain: $('.js-second-nav'),
  $elChildren: $('.nav__item__wrapper'),
  isOpened: false,
  
  events: function() {
    var self = this;
    this.$elToggle.on('click', function() {
      if (self.isOpened) {
        self.close();
      } else {
        self.open();
      }
    });
    $(document).on('click', function(e) {
      if (self.isOpened) {
        var is_menu = $(e.target).closest(self.$el).length;
        var is_toggle = $(e.target).closest(self.$elToggle).length;
        var is_secondCurtain = $(e.target).closest(self.$elSecondCurtain).length;
        if(!is_menu && !is_toggle && !is_secondCurtain) {
          self.close();
        }
      }
    });
  },
  open: function() {
    this.$el.addClass('is-open');
    this.$elToggle.addClass('is-active');
    this.isOpened = true;
  },
  close: function() {
    this.$el.removeClass('is-open');
    this.$elToggle.removeClass('is-active');
    this.$elChildren.removeClass('is-selected');
    this.isOpened = false;
  },
  init: function() {
   this.events();
  }
};

var SecondCurtainMenu = {
  $el: $('.js-second-nav'),
  $elToggle: $('.nav__item__wrapper'),
  isOpened: false,
  
  events: function() {
    var self = this;
    this.$elToggle.on('click', function(e) {
      if (self.isOpened) {
        self.updateContent(e);
      } else {
        self.open(e);
        self.updateContent(e);
      }
    });
    // Close both curtains when user clicks on the header toggle
    $('.js-nav-toggle').on('click', function() {
      if (self.isOpened) {
        self.close();
        self.isOpened = false;
      }
    });
  },
  open: function(e) {
    this.$el.addClass('is-open');
    $(e.target).addClass('is-selected');
    this.isOpened = true;
  },
  close: function() {
    this.$el.removeClass('is-open');
    this.isOpened = false;
  },
  updateContent: function(e) {
    this.$elToggle.removeClass('is-selected');
    $(e.target).addClass('is-selected');
    $('.nav--right__content__child-name').text($(e.target).text());
  },
  init: function() {
   this.events();
  }
};

var SearchBar = {
  $el: $('.js-nav-search'),
  $elToggleOpen: $('.js-nav-search-open'),
  $elToggleClose: $('.js-nav-search-close'),
  isOpened: false,
  
  events: function() {
    var self = this;
    this.$elToggleOpen.on('click', function() {
      if (!self.isOpened) { self.open(); }
    });
    this.$elToggleClose.on('click', function() {
      if (self.isOpened) { self.close(); }
    });
  },
  open: function() {
    this.$el.addClass('is-active');
    this.isOpened = true;
  },
  close: function() {
    this.$el.removeClass('is-active');
    this.isOpened = false;
  },
  init: function() {
   this.events();
  }
};

FirstCurtainMenu.init();
SecondCurtainMenu.init();
SearchBar.init();

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js