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CSS

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HTML 

              
                <header>
  <h1>Super Awesome Movies</h1>
</header>
<article>
  <section data-best-picture>
    <h1>2015 Best Picture Nominees</h1>
    <ol>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/wb/americansniper/images/poster-large.jpg>
          <div>
            <h2>American Sniper</h2>
            <p>Clint Eastwood</p>
          </div>
        </a>
      </li>
      <li class=winner>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/fox_searchlight/birdman/images/poster-large.jpg>
          <div>
            <h2>Birdman</h2>
            <p>Alejandro G. Iñarritu</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/ifcfilms/boyhood/images/poster-large.jpg>
          <div>
            <h2>Boyhood</h2>
            <p>Richard Linklater</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/fox_searchlight/thegrandbudapesthotel/images/poster-large.jpg>
          <div>
            <h2>The Grand Budapest Hotel</h2>
            <p>Wes Anderson</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/weinstein/theimitationgame/images/poster-large.jpg>
          <div>
            <h2>The Imitation Game</h2>
            <p>Morten Tyldum</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/paramount/selma/images/poster-large.jpg>
          <div>
            <h2>Selma</h2>
            <p>Ava DuVernay</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/focus_features/thetheoryofeverything/images/poster-large.jpg>
          <div>
            <h2>The Theory of Everything</h2>
            <p>James Marsh</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/sony/whiplash/images/poster-large.jpg>
          <div>
            <h2>Whiplash</h2>
            <p>Damien Chazelle</p>
          </div>
        </a>
      </li>
    </ol>
  </section>
  <aside data-best-picture>
    <h1>2015 Best Picture Nominees</h1>
    <ol>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/wb/americansniper/images/poster-large.jpg>
          <div>
            <h2>American Sniper</h2>
            <p>Clint Eastwood</p>
          </div>
        </a>
      </li>
      <li class=winner>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/fox_searchlight/birdman/images/poster-large.jpg>
          <div>
            <h2>Birdman</h2>
            <p>Alejandro G. Iñarritu</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/ifcfilms/boyhood/images/poster-large.jpg>
          <div>
            <h2>Boyhood</h2>
            <p>Richard Linklater</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/fox_searchlight/thegrandbudapesthotel/images/poster-large.jpg>
          <div>
            <h2>The Grand Budapest Hotel</h2>
            <p>Wes Anderson</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/weinstein/theimitationgame/images/poster-large.jpg>
          <div>
            <h2>The Imitation Game</h2>
            <p>Morten Tyldum</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/paramount/selma/images/poster-large.jpg>
          <div>
            <h2>Selma</h2>
            <p>Ava DuVernay</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/focus_features/thetheoryofeverything/images/poster-large.jpg>
          <div>
            <h2>The Theory of Everything</h2>
            <p>James Marsh</p>
          </div>
        </a>
      </li>
      <li>
        <a href=#>
          <img src=https://trailers.apple.com/trailers/sony/whiplash/images/poster-large.jpg>
          <div>
            <h2>Whiplash</h2>
            <p>Damien Chazelle</p>
          </div>
        </a>
      </li>
    </ol>
  </aside>
  <footer>
    <p>Movie images and information via <a href=https://trailers.apple.com>Apple Trailers</a></p>
  </footer>
</article>
!

CSS 

              
                * {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-kerning: auto;
}
html {
  font-size: 10pt;
  line-height: 1.4;
  font-weight: 400;
  font-family: 'Open Sans', sans-serif;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
}
header {
  padding: 1em;
  background: -webkit-linear-gradient(270deg, #cc0000, #660000);
  background: linear-gradient(180deg, #cc0000, #660000);
}
header h1 {
  margin: 0;
  font-family: "Playfair Display SC", serif;
  font-weight: 900;
  font-style: italic;
  color: white;
  text-shadow: 0 2px 2px black;
}
article {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1em;
}
article:after {
  content: '';
  display: block;
  clear: both;
}
footer p {
  font-family: "Source Sans Pro", sans-serif;
  font-size: 10pt;
  color: #555;
}
[data-best-picture] h1 {
  font-family: "Playfair Display SC", serif;
  font-size: 1.125em;
  font-weight: 400;
  font-style: smallcaps;
  text-align: center;
  background: -webkit-linear-gradient(270deg, #333, #111);
  background: linear-gradient(180deg, #333, #111);
  color: white;
  padding: 1rem;
}
aside[data-best-picture] h1 {
  background: linear-gradient(180deg, #333, #111);
  color: white;
}
[data-best-picture] ol {
  list-stlye: none;
  padding: 0;
  margin: 1em;
}
[data-best-picture] li {
  display: block;
}
[data-best-picture] li + li {
  border-top: 1px solid #ddd;
  padding-top: 0.5em;
  margin-top: 0.5em;
}
[data-best-picture] a {
  text-decoration: none;
  display: block;
  position: relative;
}
[data-best-picture] a:after {
  content: '';
  display: table;
  clear: both;
}
[data-best-picture] img {
  float: left;
  width: 20%;
  -webkit-transition: -webkit-transform 150ms ease-in-out;
  transition: -webkit-transform 150ms ease-in-out;
  transition: transform 150ms ease-in-out;
  transition: transform 150ms ease-in-out, -webkit-transform 150ms ease-in-out;
}
[data-best-picture] a:hover [data-best-picture] img {
  -webkit-transform: scale(0.9);
          transform: scale(0.9);
}
[data-best-picture] div {
  float: left;
  width: 80%;
  padding-left: 0.5em;
  box-sizing: border-box;
}
[data-best-picture] h2 {
  color: #333;
  margin: 0;
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: 1em;
}
[data-best-picture] .winner h2 {
  font-weight: 700;
  font-style: italic;
  color: #C69F24;
}
[data-best-picture] p {
  margin: 0;
  color: #666;
  font-family: "Tauri", sans-serif;
  font-size: 0.75em;
  font-weight: 400;
}
[data-best-picture] .winner p {
  color: #888;
}
[data-best-picture] p:before {
  content: 'Directed by: ';
  font-weight: 400;
  color: #999;
  display: none;
}
aside {
  display: none;
}
@element [data-best-picture] p and (min-width: 220px) {
  $this:before {
    display: inline;
  }
}
@element [data-best-picture] .winner div and (min-width: 220px) {
  $this:before {
    content: 'Best Picture Winner';
  }
}
@element [data-best-picture] and (min-width: 400px) {
  $this h1 {
    background: none;
    color: #333;
    font-size: 1.25em;
  }
  $this li {
    display: inline-block;
    width: 50%;
  }
  $this li + li {
    border-top: none;
    padding-top: auto;
    margin-top: auto;
    margin-left: -4px;
  }
  $this a {
    overflow: hidden;
    margin: 0.5em;
    border: 1px solid #333;
    box-shadow: 0 0.125em 0.25em rgba(0, 0, 0, 0.5);
  }
  $this a:after {
    display: block;
    content: '';
    padding-top: 147.5095785%;
  }
  $this img {
    float: none;
    width: 100%;
    position: absolute;
    display: block;
  }
  $this a:hover img {
    -webkit-transform: scale(1.1);
            transform: scale(1.1);
  }
  $this div {
    float: none;
    width: 100%;
    position: absolute;
    bottom: 0;
    padding: 1.5em 1em;
    background: -webkit-linear-gradient(270deg, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.9));
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.9));
  }
  $this .winner div {
    background: -webkit-linear-gradient(270deg, rgba(193, 165, 32, 0.9), rgba(137, 100, 14, 0.9));
    background: linear-gradient(180deg, rgba(193, 165, 32, 0.9), rgba(137, 100, 14, 0.9));
    padding: 0.5em 1em 1.5em;
  }
  $this .winner div:before {
    content: '2015 Winner';
    color: white;
    font-family: "Tauri", sans-serif;
    font-size: 0.675em;
    text-shadow: 0px -1px rgba(0, 0, 0, 0.3);
    text-transform: uppercase;
    display: block;
    text-align: center;
    letter-spacing: 0.25em;
    margin: 0 -1em 0.5em;
  }
  $this h2 {
    font-size: 1.125em;
    color: white;
    text-shadow: 0px 1px 2px rgba(0, 0, 0, 0.5);
  }
  $this .winner h2 {
    font-weight: 700;
    color: white;
    text-shadow: 0 -1px #89640E;
  }
  $this p {
    color: white;
    text-shadow: 0px 1px 2px rgba(0, 0, 0, 0.5);
  }
  $this p:before {
    color: #aaa;
  }
  $this .winner p {
    color: #312A05;
    text-shadow: 0 1px rgba(214, 188, 46, 0.4);
  }
  [data-best-picture] .winner p:before {
    color: #413806;
  }
}
@element [data-best-picture] and (min-width: 600px) {
  $this h1 {
    font-size: 1.75em;
  }
  $this ol {
    margin: 1em;
  }
  $this li {
    width: 33.333%;
  }
}
@element [data-best-picture] and (min-width: 900px) {
  $this h1 {
    font-size: 2.5em;
  }
  $this li {
    width: 25%;
  }
}
@element article and (min-width: 900px) {
  $this section,
  $this aside {
    float: left;
  }
  $this section {
    width: 75%;
  }
  $this aside {
    display: block;
    width: 25%
  }
}
!

JS
!
999px

Console