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CSS

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HTML 

              
                <nav class="nav nav--active">
  <ul class="nav__list">
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color1" data-letter="a"></div>
        <p class="nav__label">About</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color2" data-letter="p"></div>
        <p class="nav__label">Products</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color3" data-letter="q"></div>
        <p class="nav__label">Questions</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color4" data-letter="e"></div>
        <p class="nav__label">Events</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color5" data-letter="s"></div>
        <p class="nav__label">Sponsors</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color6" data-letter="c"></div>
        <p class="nav__label">Contact</p>
      </a>
    </li>
  </ul>
  <div class="burger burger--close">
    <div class="burger__patty"></div>
  </div>
   <a href="http://ettrics.com/code/horizontal-tab-menu/" class="logo" target="_blank">
   <img class="logo" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/45226/ettrics-logo.svg" alt="" /> 
  </a>
</nav>

<div class="page">
  <section class="section section--active color1" data-letter="a">
    <article class="section__wrapper">
      <h1 class="section__title">About us</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.<br>Voluptatem necessitatibus aliquid cum repellat nihil praesentium tenetur vel voluptates cumque animi accusantium, deserunt, vitae est. Quas suscipit sint quidem fuga repudiandae.</p>
    </article>
  </section>
  <section class="section color2" data-letter="p">
    <article class="section__wrapper">
      <h1 class="section__title">Products</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.<br> Quos vel omnis quibusdam at inventore atque assumenda dignissimos ipsa magni perferendis, minima neque saepe reprehenderit quisquam numquam voluptas quo placeat quaerat!</p>
    </article>
  </section>
  <section class="section color3" data-letter="q">
    <article class="section__wrapper">
      <h1 class="section__title">Questions</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.<br> Labore iure tempora magnam aliquid voluptatum sit placeat necessitatibus, adipisci est, ipsum doloremque. Id quia consequatur labore repellendus. Ab eligendi voluptatibus doloribus.</p>
    </article>
  </section>
  <section class="section color4" data-letter="e">
    <article class="section__wrapper">
      <h1 class="section__title">Events</h1>
     <p>Use your 'left' and 'right' arrow keys to navigate.<br> Earum porro, at odit. Dolorem velit asperiores quam obcaecati ex numquam aspernatur at et! Possimus blanditiis, distinctio est qui deleniti nisi dolorem!</p>
    </article>
  </section>
  <section class="section color5" data-letter="s">
    <article class="section__wrapper">
      <h1 class="section__title">Sponsors</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.<br> Autem alias perferendis facilis, quibusdam, ratione repellendus, voluptate officiis ipsa ullam magnam libero atque doloribus sunt est ea nisi iste porro excepturi.</p>
    </article>
  </section>
  <section class="section color6" data-letter="c">
    <article class="section__wrapper">
      <h1 class="section__title">Contact us</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.<br> Dicta nostrum ad minima magnam, in nemo doloremque eum! Deserunt illo, laudantium eos ad, quisquam nisi, necessitatibus saepe ex a sit impedit.</p>
    </article>
  </section>
</div>
!

CSS 

              
                easeout(s=.45s)
  transition all s cubic-bezier(0.23, 1, 0.32, 1)
align()
  display flex
  align-items center
  justify-content center
color1 = #1abc9c;
color2 = #e74c3c;
color3 = #3498db;
color4 = #F4D03F;
color5 = #9b59b6;
color6 = #bdc3c7;
  
*
  box-sizing border-box
  -webkit-tap-highlight-color:  rgba(white, 0); // remove tap highlight on android chrome

body
  line-height 1.5
  font-family 'Montserrat'
  -webkit-font-smoothing antialiased
  text-rendering optimizeLegibility
  color lighten(black, 10)
  background lighten(black, 10)
  
a
  text-decoration none
  color inherit
  
 ul
   list-style-type none
   margin 0
   padding 0
   
 .nav
   will-change: transform
   position fixed
   top 0
   left 0
   width 100%
   z-index 1
   background lighten(black, 10)
   transform translateY(-100%)
   easeout()
   
   &--active
     transform translateY(0)
   
   &__list
     display flex
   
   &__item
     flex 1
     position relative
     easeout()
     
     &:hover
       opacity 0.75
        
   &__thumb
     display block
     height 120px
     background crimson
     easeout()
              
     &:before
       content attr(data-letter)
       position absolute
       top 50%
       left 50%
       transform translate(-50%, -50%)
       font-size 70px
       text-transform uppercase
       opacity 0.15
     
   &__label
     position absolute
     top 50%
     left 50%
     transform translate(-50%, -50%)
     text-transform uppercase
     letter-spacing 2px
     color lighten(black, 10)
     margin 0
     
   @media (max-width 850px)
     &__label
       font-size 14px
       
   @media (max-width 720px)
     &__label
       display none

     &__thumb
       height 90px
       &:before
         font-size 32px
         opacity 0.7
     
.burger
  position absolute
  right 0
  top 100%
  width 60px
  height 60px
  background lighten(black, 10)
  cursor pointer
  align()
  
  &__patty
    position relative
    width 60%
    height 2px
    background white
    easeout()
    
    &:before,
    &:after
      will-change transform
      content ""
      position absolute
      left 0
      background white
      height 2px
      width 100%
      easeout()
    
    &:before
      top -10px
    &:after
      top 10px
      
  &--close
    .burger__patty
      transform rotate(45deg)
      &:before
        transform rotate(-90deg) translate(-9px, 0)
      &:after
        opacity 0
        transform scaleX(0)

.page
  height 100vh
  will-change transform
  perspective 400px
  overflow hidden
  easeout()

.section
  will-change transform
  position absolute
  width 100%
  top 0
  left 0
  height 100vh
  overflow hidden
  align()
  text-align center
  background white
  transform translateX(100%)
  easeout(.7s)
  
  &--hidden
    transform translateX(-100%);
  
  &--active
    transform translateX(0) rotateY(0)
    z-index 2
    
  &:before
    content attr(data-letter)
    position absolute
    top 50%
    left 50%
    transform translate(-50%, -50%)
    font-size 75vh
    text-transform uppercase
    opacity 0.15
    z-index -1
    
  &__wrapper
    width 100%
    max-width 800px
    padding 0 8vw
    
  &__title
    margin 0 0 25px 0
    font-size 24px
    text-transform uppercase
    letter-spacing 4px
    
  p
    margin 0 0 25px 0
    font-family 'Georgia'
    font-size 20px
    
    &:last-child
      margin-bottom 0
      
.color1
  background color1
.color2
  background color2
.color3
  background color3
.color4
  background color4
.color5
  background color5
.color6
  background color6
  
.logo
  position: fixed
  top: 195px
  right: 7px
  z-index: 2
  
  @media (max-width 720px)
     top 160px
  
  
  img
    width: 45px
    transform: rotate(0)
    easeout()
  
    &:hover
      transform: rotate(180deg) scale(1.1)
!

JS 

              
                var Nav = (function() {
  
  var
  	nav 		= $('.nav'),
  	burger	= $('.burger'),
    page 		= $('.page'),
    section = $('.section'),
    link		= nav.find('.nav__link'),
    navH		= nav.innerHeight(),
    isOpen 	= true,
    hasT 		= false;
  
  var toggleNav = function() {
    nav.toggleClass('nav--active');
    burger.toggleClass('burger--close');
    shiftPage();
  };
  
  var shiftPage = function() {
    if (!isOpen) {
      page.css({
        'transform': 'translateY(' + navH + 'px)',
        '-webkit-transform': 'translateY(' + navH + 'px)'
      });
      isOpen = true;
    } else {
      page.css({
        'transform': 'none',
        '-webkit-transform': 'none'
      });
      isOpen = false;
    }
  };
  
  var switchPage = function(e) {
    var self = $(this);
    var i = self.parents('.nav__item').index();
    var s = section.eq(i);
    var a = $('section.section--active');
    var t = $(e.target);
    
    if (!hasT) {
      if (i == a.index()) {
        return false;
      }
      a
      .addClass('section--hidden')
      .removeClass('section--active');

      s.addClass('section--active');

      hasT = true;

      a.on('transitionend webkitTransitionend', function() {
        $(this).removeClass('section--hidden');
        hasT = false;
        a.off('transitionend webkitTransitionend');
      });
    }

    return false;
  };
  
  var keyNav = function(e) {
    var a = $('section.section--active');
    var aNext = a.next();
    var aPrev = a.prev();
    var i = a.index();
    
    
    if (!hasT) {
      if (e.keyCode === 37) {
      
        if (aPrev.length === 0) {
          aPrev = section.last();
        }

        hasT = true;

        aPrev.addClass('section--active');
        a
          .addClass('section--hidden')
          .removeClass('section--active');

        a.on('transitionend webkitTransitionend', function() {
          a.removeClass('section--hidden');
          hasT = false;
          a.off('transitionend webkitTransitionend');
        });

      } else if (e.keyCode === 39) {

        if (aNext.length === 0) {
          aNext = section.eq(0)
        } 


        aNext.addClass('section--active');
        a
          .addClass('section--hidden')
          .removeClass('section--active');

        hasT = true;

        aNext.on('transitionend webkitTransitionend', function() {
          a.removeClass('section--hidden');
          hasT = false;
          aNext.off('transitionend webkitTransitionend');
        });

      } else {
        return
      }
    }  
  };
    
  var bindActions = function() {
    burger.on('click', toggleNav);
    link.on('click', switchPage);
    $(document).on('ready', function() {
       page.css({
        'transform': 'translateY(' + navH + 'px)',
         '-webkit-transform': 'translateY(' + navH + 'px)'
      });
    });
    $('body').on('keydown', keyNav);
  };
  
  var init = function() {
    bindActions();
  };
  
  return {
    init: init
  };
  
}());

Nav.init();
!
999px

Console