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HTML

CSS

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JavaScript

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HTML

              
                .tabs-grid
   .tabs-grid__item
   .tabs-grid__item
   .tabs-grid__item
   .tabs-grid__item
   .tabs-grid__item
.tabs-grid.tabs-grid--two-tabs
   .tabs-grid__item
   .tabs-grid__item
              
            
!

CSS

              
                .tabs-grid
   position: relative
   margin: 20px auto
   width: 70%
   height: 30vh
   min-height: 100px
   max-height: 200px
   display: grid
   grid-gap: 30px
   grid-template-columns: repeat(5, minmax(20px, 100%))
   background: rgba(70, 200, 170, 0.20)
   border-radius: 20px
   &--two-tabs
      grid-template-columns: minmax(160px, 2fr) minmax(160px, 3fr)
   &__item
      position: relative
      width: 100%
      height: 100%
      background: rgba(70, 200, 170, 0.20)
      border-radius: 20px
      &:before, &:after
         content: ''
         display: block
         position: absolute
         top: -4%
         height: 108%
      &:before
         left: 0
         border-left: 1px solid rgba(70, 200, 170, 0.40)
      &:after
         right: 0
         border-right: 1px solid rgba(70, 200, 170, 0.40)
              
            
!

JS

              
                //Trying to do it with no JS
              
            
!
999px

Console