<h1>Gallery</h1>

<div class="gallery-wrap">
  <div class="item item-1"></div>
  <div class="item item-2"></div>
  <div class="item item-3"></div>
  <div class="item item-4"></div>
  <div class="item item-5"></div>
</div>
body{
  padding: 100px;
}

h1{
  position: relative;
  margin-bottom: 45px;
  font-family: 'Oswald', sans-serif;
  font-size: 44px;
  text-transform: uppercase;
  color: #424242;
}

.gallery-wrap {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 70vh;
}

.item {
  flex: 1;
  height: 100%;
  background-position: center;
  background-size: cover;
  background-repeat: none;
  transition: flex 0.8s ease;
  
  &:hover{
    flex: 7;
  }
}

.item-1 { 
  background-image: url('https://images.unsplash.com/photo-1499198116522-4a6235013d63?auto=format&fit=crop&w=1233&q=80');
}

.item-2 { 
  background-image: url('https://images.unsplash.com/photo-1492760864391-753aaae87234?auto=format&fit=crop&w=1336&q=80');
}

.item-3 { 
  background-image: url('https://images.unsplash.com/photo-1503631285924-e1544dce8b28?auto=format&fit=crop&w=1234&q=80');
}

.item-4 { 
  background-image: url('https://images.unsplash.com/photo-1510425463958-dcced28da480?auto=format&fit=crop&w=1352&q=80');
}

.item-5 { 
  background-image: url('https://images.unsplash.com/photo-1503602642458-232111445657?auto=format&fit=crop&w=1234&q=80');
}

External CSS

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External JavaScript

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