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              header#hero.hero
  .hero-inner  
    h1.animate-normal Hero Title
    h2.animate-delay Marley was dead: to begin with. There is no doubt whatever about that.
    
header.hero.section-a
  .hero-inner  
    h1.hero-title Hero Title
    h2.hero-subtitle Marley was dead: to begin with. There is no doubt whatever about that.
    
header.hero.section-b
  .hero-inner  
    h1.hero-title Hero Title
    h2.hero-subtitle Marley was dead: to begin with. There is no doubt whatever about that.
    
header.hero.section-c
  .hero-inner  
    h1.hero-title Hero Title
    h2.hero-subtitle Marley was dead: to begin with. There is no doubt whatever about that.
            
          
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              // common hero section properties
.hero
  height: 100vh
  display: flex
  justify-content: center
  align-items: center

#hero
  background: linear-gradient(rgba(black, 0.5),rgba(black, 0.5)), url(https://source.unsplash.com/1600x900/?city)
    size: cover
    position: center
    repeat: no-repeat
  
.section-a
  background: linear-gradient(rgba(black, 0.5),rgba(black, 0.5)), url(https://source.unsplash.com/1600x900/?nature)
    size: cover
    position: center
    repeat: no-repeat
  
.section-b
  background: linear-gradient(rgba(black, 0.5),rgba(black, 0.5)), url(https://source.unsplash.com/1600x900/?mountain)
    size: cover
    position: center
    repeat: no-repeat
  
.section-c
  background: linear-gradient(rgba(black, 0.5),rgba(black, 0.5)), url(https://source.unsplash.com/1600x900/?technology)
    size: cover
    position: center
    repeat: no-repeat
  
  
  
.hero-inner
  text-align: center
  max-width: 600px

h1,
h2
  margin: 0
  color: white
  opacity: 0
  // starting position of the text is 40px
  // this is how far it will move up on load
  transform: translateY(40px)
  
h1
  font-size: 3rem
  margin: 0 0 2rem
  
h2
  font-weight: 400
  font-size: 2rem
  
.animate-normal
  // call the keyframe animation
  animation: animateIn 1000ms ease forwards
  
.animate-delay
  // 300ms delay on the bottom headline
  animation: animateIn 1000ms ease 300ms forwards
  
  
// what you're animating

@keyframes animateIn
  0%
    opacity: 0
    transform: translateY(40px)
  100%
    // fade in
    opacity: 1
    // move up 40px
    transform: translateY(0)
            
          
!
            
              // find the top of each section
var sectionA = $('.section-a').offset().top;
var sectionB = $('.section-b').offset().top;
var sectionC = $('.section-c').offset().top;

// number of pixels before the section to start animation
var scrollOffset = 100; 


// run this function when the window scrolls
$(window).scroll(function() {  
  
   
  // get the window height on scroll
  var scroll = $(window).scrollTop() + scrollOffset;  
  
  

  // if scroll hits the top of section-a
  if ( scroll > sectionA ) {
    $('.section-a .hero-title').addClass('animate-normal');
    $('.section-a .hero-subtitle').addClass('animate-delay');
  }

  // if scroll hits the top of section-b
  if ( scroll > sectionB ) {
    $('.section-b .hero-title').addClass('animate-normal');
    $('.section-b .hero-subtitle').addClass('animate-delay');
  }

  // if scroll hits the top of section-c
  if ( scroll > sectionC ) {
    $('.section-c .hero-title').addClass('animate-normal');
    $('.section-c .hero-subtitle').addClass('animate-delay');
  }
});



            
          
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