Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <header class="header" role="banner">
  <h1>Flexbox YouTube Thumbnail Grid</h1>
</header>
<main role="main">
  <article>
    <p>Responsive flexbox unordered list grid of YouTube video thumbnails with Fancybox links. Uses a 9kb image with a 16:9 aspect ratio to be able to use the YouTube thumbnails as a background image, without seeing those black letterbox bars at the top and bottom. This also makes the video thumbnails fluid when resizing the browser.</p>
  </article>
  <section class="videos" id="featured-videos">
    <div class="video-grid front-page" id="front-page-videos">
      <ul class="video-list featured">
        <li class="video featured">
          <a data-fancybox href="https://www.youtube.com/embed/Zq6Crtglztk?autoplay=1&controls=0&showinfo=0&color=white&rel=0" class="featured-video">
            <figure style="background-image: url(https://img.youtube.com/vi/Zq6Crtglztk/hqdefault.jpg);">
              <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/50598/video-thumb-placeholder-16-9.png" />
              <figcaption>Swap-Meet Speed for Roadkill Nights</figcaption>
            </figure>
          </a>
        </li>
        <li class="video featured">
          <a data-fancybox href="https://www.youtube.com/embed/qDK86kzgUPg?autoplay=1&controls=0&showinfo=0&color=white&rel=0" class="featured-video">
            <figure style="background-image: url(https://img.youtube.com/vi/qDK86kzgUPg/hqdefault.jpg);">
              <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/50598/video-thumb-placeholder-16-9.png" />
              <figcaption>Cummins Diesel in a Cadillac</figcaption>
            </figure>
          </a>
        </li>
        <li class="video featured">
          <a data-fancybox href="https://www.youtube.com/embed/uSB2_428P2w?autoplay=1&controls=0&showinfo=0&color=white&rel=0" class="featured-video">
            <figure style="background-image: url(https://img.youtube.com/vi/uSB2_428P2w/hqdefault.jpg);">
              <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/50598/video-thumb-placeholder-16-9.png" />
              <figcaption>Dirt-Track Challenger Rescue and Thrash</figcaption>
            </figure>
          </a>
        </li>
        <li class="video featured">
          <a data-fancybox href="https://www.youtube.com/embed/pOhl6oVpEes?autoplay=1&controls=0&showinfo=0&color=white&rel=0" class="featured-video">
            <figure style="background-image: url(https://img.youtube.com/vi/pOhl6oVpEes/hqdefault.jpg);">
              <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/50598/video-thumb-placeholder-16-9.png" />
              <figcaption>Junkyard 1956 Buick Hack</figcaption>
            </figure>
          </a>
        </li>
        <li class="video featured">
          <a data-fancybox href="https://www.youtube.com/embed/PVs_xZ46Cxw?autoplay=1&controls=0&showinfo=0&color=white&rel=0" class="featured-video">
            <figure style="background-image: url(https://img.youtube.com/vi/PVs_xZ46Cxw/hqdefault.jpg);">
              <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/50598/video-thumb-placeholder-16-9.png" />
              <figcaption>Wheelstanding Dump Truck! Stubby Bob’s Comeback</figcaption>
            </figure>
          </a>
        </li>
        <li class="video featured">
          <a data-fancybox href="https://www.youtube.com/embed/C4jk51rgfts?autoplay=1&controls=0&showinfo=0&color=white&rel=0" class="featured-video">
            <figure style="background-image: url(https://img.youtube.com/vi/C4jk51rgfts/hqdefault.jpg);">
              <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/50598/video-thumb-placeholder-16-9.png" />
              <figcaption>Will It Go 10s? Mazdarati Is Back!</figcaption>
            </figure>
          </a>
        </li>
      </ul>
    </div
  </section>
</main>
              
            
!

CSS

              
                /**
 * Grid styles
 */
.video-grid.front-page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1em 2em;
}

ul.video-list {
  display: flexbox;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

li.video {
  flex-grow: 1;
  position: relative;
  ooverflow: hidden;
	width: 33.333333333%;
	width: -webkit-calc(100% / 3);
	width: calc(100% / 3);
  border: solid 0.2em transparent;
  
  & a {
    outline: none;
  }
      
  &:before {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0);
    transition: background-color .15s;
  }
  
  & figure {
    display: block;
    position: relative;
    overflow: hidden;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    
    & img {
      display: block;
      max-width: 100%;
      height: auto;
      opacity: 0;
      transform: scale(0.5);
      transition: all .20s;
    }

    & figcaption {
      position: absolute;
      bottom: 0;
      width: 100%;
      background: rgba(0,0,0,0.6);
      color: #fff;
      font-size: 1.4rem;
      font-weight: 600;
      padding: 1rem;
      transform: translateY(0);
      opacity: 1;
      transition: all .20s;
    }
  }
  
  &:hover {
    & figure {
      & img {
        opacity: 1;
        transform: scale(1);
      }
      
      & figcaption {
        opacity: 0;
        transform: translateY(50%);
      }
    }
  }
  
  &:hover:before {
    background-color: rgba(0,0,0,0.3);
  }
}

@media screen and (max-width: 800px) {
	li.video {
		width: 50%;
		width: -webkit-calc(100% / 2);
		width: calc(100% / 2);
	}
}

@media screen and (max-width: 640px) {
	li.video {
		width: 100%;
	}
}

/**
 * Pen styles
 */
html { box-sizing: border-box; height: 100%; overflow-y: scroll; font-size: 62.5%; }
*, *:before, *:after { box-sizing: inherit; }
body {
	background: #fff;
	color: #444;
	font-family: 'Open Sans', Arial, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
	font-size: 1.8rem;
	line-height: 1.2;
}

header {
  width: 100%;
  padding: 2em;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.7);
  
  & h1 {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.03em;
    color: #666;
  }
}

main {
  padding: 2rem 0;
}

article {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1em 2em;
}
              
            
!

JS

              
                
              
            
!
999px

Console