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HTML

CSS

CSS Base

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JavaScript

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HTML Settings

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HTML

              
                div#main
 .quarter
   span Responsive SQUARE BOX
   .squareBox
     .content.center
       .centerBox
         img.max(src="http://dummyimage.com/90x90/123/def" alt="image")
              
            
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CSS

              
                @import 'nib'
body
  background-color: #eee
img
  width: auto
  max-width: 100%
  height: auto
  vertical-align: bottom
img.max
  width: 100%
  
#main
  width: 80%
  margin: 0 auto
  padding: 15px 0 30px
  background-color: #FFF

.quarter
  margin: 0 auto
  width: 25%

.squareBox
  position: relative
  &:before
    content: ''
    display: block
    padding-top: 100%

  .content
    position: absolute
    top: 0
    width: 100%
    height: 100%
    box-sizing: border-box
    color: #FFF
    background-color: #03a9f4
  
.center
  background-color: #ff5722
  text-align: center
 
 .centerBox
   position: absolute
   top: 0
   left: 0
   right: 0
   bottom: 0
   margin: auto
   width: 90px
   height: 90px
              
            
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JS

              
                
              
            
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999px

Console