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About the <head>

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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About Vendor Prefixing

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <nav class="nav nav--active">
  <!--<p>hola</p>-->
  <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">JÓVENES</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color2" data-letter="e"></div>
        <p class="nav__label">DIFUSIÓN</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color3" data-letter="c"></div>
        <p class="nav__label">PARA MUNICIPIOS</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color4" data-letter="a"></div>
        <p class="nav__label">GEPEA</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color5" data-letter="r"></div>
        <p class="nav__label">GEORREFERENCIA</p>
      </a>
    </li>
    <li class="nav__item">
      <a href="" class="nav__link">
        <div class="nav__thumb color6" data-letter="g"></div>
        <p class="nav__label">PRIORITARIOS</p>
      </a>
    </li>
  </ul>
   <a href="http://ettrics.com/" 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">Awareness</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.</p>
    </article>
  </section>
  <section class="section color2" data-letter="p">
    <article class="section__wrapper">
      <h1 class="section__title">Engagement</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.</p>
    </article>
  </section>
  <section class="section color3" data-letter="q">
    <article class="section__wrapper">
      <h1 class="section__title">Consideration</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.</p>
    </article>
  </section>
  <section class="section color4" data-letter="e">
    <article class="section__wrapper">
      <h1 class="section__title">Acquisition</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.</p>
    </article>
  </section>
  <section class="section color5" data-letter="s">
    <article class="section__wrapper">
      <h1 class="section__title">Retention</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.</p>
    </article>
  </section>
  <section class="section color6">
    <article class="section__wrapper">
      <h1 class="section__title">Growth</h1>
      <p>Use your 'left' and 'right' arrow keys to navigate.</p>
    </article>
  </section>
</div>
<div class="footer">
  <p>hola</p>
</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 = #1B1F25;
color2 = #e74c3c;
color3 = #3498db;
color4 = #9b59b6;
color5 = #1BC885;
color6 = #DFB816;
  
*
  box-sizing border-box
  -webkit-tap-highlight-color:  rgba(white, 0); // remove tap highlight on android chrome

body
  line-height 1.5
  font-family "futura-pt", 'Century Gothic','Arial', sans-serif
  -webkit-font-smoothing antialiased
  text-rendering optimizeLegibility
  color lighten(white, 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 80px
     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
     
   &__label
     position absolute
     top 50%
     left 50%
     transform translate(-50%, -50%)
     text-transform uppercase
     letter-spacing 2px
     color darken(white, 10)
     margin 0
     
   @media (max-width 850px)
     &__label
       font-size 14px
       
   @media (max-width 720px)
     &__label
       display none

     &__thumb
       height 60px
       &:before
         font-size 24px
         opacity 0.7

.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
    
  &__wrapper
    width 100%
    max-width 800px
    padding 0 8vw
    position relative
    
  &__title
    margin 0 0 25px 0
    font-size 48px
    font-weight normal
    text-transform uppercase
    letter-spacing 5px
    
    &:before
      content ''
      position absolute
      top 5rem
      left 45%
      margin: auto
      width: 10%
      height: 2px
      background: #ffffff
      
    @media (max-width 720px)
      font-size 28px
      
      &:before
            top 3.25rem
    
  p
    margin 0 0 25px 0
    font-family 'Georgia'
    font-size 18px
    color white
    opacity 0.55
    
    @media (max-width 720px)
      font-size 16px
    
    &: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: 100px
  right: 20px
  z-index: 2
  
  @media (max-width 720px)
     top 110px
     right: 50%
     margin-right -20px

  img
    width: 45px
    transform: rotate(0)
    easeout()
  
    &:hover
      transform: rotate(180deg) scale(1.1)
!

JS 

              
                var Nav = (function() {
  
  var
  	nav 		= $('.nav'),
    section = $('.section'),
    link		= nav.find('.nav__link'),
    navH		= nav.innerHeight(),
    isOpen 	= true,
    hasT 		= false;
  
  var toggleNav = function() {
    nav.toggleClass('nav--active');
    shiftPage();
  };
  
  
  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() {
    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

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