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CSS

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HTML

              
                <div class="main">
    
    <div class="content">
       <h1>Balloons in Bristol</h1>
      <p>Despite the fact that British weather is not ideal for modes of transport that are unusable during any significant weather, Bristol is known for hot air balloons. These make pleasing images to include in presentation code demos. Here are some.</p>
    </div>
    
    <div class="content--fullwidth">
      <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/12005/cssday-img2.jpg">
    </div>
    
    <div class="content">
      <p>The image in this demo has been placed using an inverse <code>width</code> in combination with a negative <code>translateX()</code></p>
    </div>
 
</div>
              
            
!

CSS

              
                /*
 * @see https://www.bram.us/2017/06/20/breaking-elements-out-of-their-containers-in-css/
 * @ref https://codepen.io/rachelandrew/pen/mwOmJW
 */

.main {
  width: 70%;
  margin: 0 auto;
  background: rgba(255,255,255,0.4);
}

.content--fullwidth {
  width: 142.857142857%; /* formula: 1 / width of wrapper */
  transform: translateX(-15%); /* formula: (100% - width of wrapper) / 2 * -1 */
}

.content {
  padding: 1em;
}

img {
  width: 100%;
  display: block;
}






* { box-sizing: border-box;}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font: 125%/1.4 'Roboto', sans-serif;
  background-color: rgb(243,247,223);
}

h1, h2, h3 {
  font-family: 'Roboto Slab', serif;
}
              
            
!

JS

              
                
              
            
!
999px

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