A Pen by Yoel Cieno.

adjusting-the-width-of-the-last-item-in-an-incomplete-grid.markdown

adjusting the width of the last item in an incomplete grid

All the credits must go to Heydon Pickering & his article: http://www.heydonworks.com/article/tetris-the-power-of-css

A Pen by Yoel Cieno on CodePen.

License.

index.html

<main>
  <section>
    <h2>orphans</h2>
    <p>adjusting the width of the last item in an incomplete grid with pure css</p>
  </section>
  <section>
    <figure>
      <img src='http://www.heydonworks.com/images/portrait.jpg' alt='Heydon Pickering' />
      <figcaption><a href='http://www.heydonworks.com/about'>Heydon Pickering</a></figcaption>
    </figure>
  </section>
  <section>
    <h2>what</h2>
    <p>add or delete &lt;section>´s and look at what happend with the widht of the last if it is the 3n+1 or 3n+2</p>  
  </section>
  
  <section>
    <h2>credits</h2>
    <p>All the credits must go to <strong>Heydon Pickering</strong> & his article:<br/> <a href='http://www.heydonworks.com/article/tetris-the-power-of-css'>Tetris & The Power Of CSS</a> in his blog <strong>heydonworks</strong></p></section>
  <section></section>
  <section></section>
  <section>
    <p>If this section is the last, its width will be the 100% of its parent,</p>
  </section>
  <section>
    <h2>the magic CSS </h2>
    <pre>
  section:nth-child(3n + 1):last-child {
    width: 100%;
    margin-right: 0;
  }
  section:nth-child(3n+2):last-child {
    width: 65%;
    margin-right: 0;
  }
</pre>
  </section>

</main>

style.css

@import url(http://fonts.googleapis.com/css?family=Roboto:400,300,100);
@import url(http://weloveiconfonts.com/api/?family=entypo);
*, *:after, *:before {
  box-sizing: border-box;
  -moz-box-sizing: border-box;
}
* {margin:0;padding:0;border: 0 none;position: relative;}
[class*="entypo-"]:before {font-family: 'entypo', sans-serif; display: inline-block; margin-right: 1rem;}
html {
  background: url(http://farm9.staticflickr.com/8204/8237429748_216c68cda0_b.jpg) no-repeat 50% top fixed;
  background-size: cover;
  position: relative;
  width: 100%;
  height: 100%;
  font-family: roboto;
  font-size: 1.2rem;
  font-weight: 300;
}
body {
  width: 100%;
  min-height: 100%;
  background: inherit;
}
main {
  margin: 5vw 5vw 0 5vw;
}
main:after {
  content:'';
  display: block;
  clear: both;
  height: 0;
}
section {
  background: rgba(255,255,255,.8);
  float: left;
  width: 30%;
  height: 35vw;
  margin: 0 5% 5vw 0;
  text-align: left;
  box-shadow: 0 0 4px rgba(0,0,0,.4);
  border-radius: .5vw;
  overflow: hidden;
}
section:nth-child(3n) {
  margin-right: 0;
}
section:nth-child(3n+1):last-child {
  width: 100%;
  margin-right: 0;
}
section:nth-child(3n+2):last-child {
  width: 65%;
  margin-right: 0;
}
h2 {
  background: #94A392;
  font-weight: 200;
  font-size: 4.5vw;
  line-height: 8vw;
  text-align: center;
  color: #fff;
  border-radius: .5vw .5vw 0 0;
  margin-bottom: 1rem;
  z-index: 1;
}
p {padding: 0 1rem;
  text-align: justify;
  color: #94A392;
}
a {
  color: #B86771;
  text-decoration: none;
}
figure {position: static;}
figure img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 12px double #94A392; 
}
figcaption, figcaption a {
  position: absolute;
  bottom: 0;left:0; right:0;
  text-align: center;
  line-height: 7vw;
  background: #B86771;
  color: #fff;
  border-radius: 0 0 .5vw .5vw;
}