Как переделать стиль css3 в css?

*, *:before, *:after {
  margin:0;
  padding:0;
  -webkit-box-sizing:border-box;
  -moz-box-sizing:border-box;
  box-sizing:border-box;
}
#gal {
  position:relative;
  width:600px;
  height:300px;
  margin:0 auto;
  top:100px;
  background:white;
  -webkit-transform:translate3d(0, 0, 0);
  -moz-transform:   translate3d(0, 0, 0);
  -ms-transform:    translate3d(0, 0, 0);
  -o-transform:     translate3d(0, 0, 0);
  transform:        translate3d(0, 0, 0);
}
#gal ul {list-style-type:none;}
input[type="radio"] {
  position:absolute;
  left:0;
  display:block;
  width:40px;
  height:75px;
  border:0;
  outline:none;
  cursor:pointer;
  opacity:0;
  z-index:9;
  
}
input[value="one"] {top:0;}
input[value="two"] {top:75px;}
input[value="three"] {top:150px;}
input[value="four"] {top:225px;}
input[type="radio"] + label {
  position:absolute;
  left:0;
  width:40px;
  height:75px;
  background:#333;
  z-index:7;
  -webkit-transition:left .1s, width .1s;
  -moz-transition:left .1s, width .1s;
  -ms-transition:left .1s, width .1s;
  -o-transition:left .1s, width .1s;
  transition:left .1s, width .1s;
}
input[value="one"] + label {top:0;}
input[value="two"] + label {top:75px;}
input[value="three"] + label {top:150px;}
input[value="four"] + label {top:225px;}
[class*="entypo-"]:before {
  position:absolute;
  font-family: 'entypo', sans-serif;
}
label[class*="entypo-"]:before {
  top:25px;
  left:15px;
  font-size:1.5rem;
  color:white;
}
a[class*="entypo-"]:before {
  top:3px;
  left:3px;
  font-size:1.5rem;
  color:#333;
}
a:hover[class*="entypo-"]:before {
  color:tomato;
}
figure, figure img, figcaption {
  position:absolute;
  top:0;
  right:0;
}
figure {
  bottom:0;
  left:0;
  width:600px;
  height:300px;
  display:block;
  overflow:hidden;
}
figure img {
  bottom:0;
  left:0;
  display:block;
  width:600px;
  height:300px;
  -webkit-transform:translateX(600px);
  -moz-transform:translateX(600px);
  -ms-transform:translateX(600px);
  -o-transform:translateX(600px);
  transform:translateX(600px);
  -webkit-transition:all .15s;
  -moz-transition:all .15s;
  -o-transition:all .15s;
  transition:all .15s;
}
figcaption {

  display:block;
  width:300px;
  height:300px;
  padding-top:100px;
  background:transparent;
  text-align:right;
  z-index:1;
  -webkit-transform:translateX(300px);
  -moz-transform:translateX(300px);
  -ms-transform:translateX(300px);
  -o-transform:translateX(300px);
  transform:translateX(300px);
  -webkit-transition:all .25s;
  -moz-transition:all .25s;
  -o-transition:all .25s;
  transition:all .25s;
}
h4 {
  display:inline-block;
  padding:0 15px;
  background:tomato;
  color:white;
  font-family: 'Titillium Web', sans-serif;
  font-weight:300;
  font-size:1.5rem;
}
figcaption nav ul {display:inline-block;padding:3px 15px;background:white;}
figcaption nav ul li {display:inline-block;margin-left:5px;}
figcaption nav ul li a {position:relative;display:block;width:30px;height:30px;text-decoration:none;color:white;}
figcaption p {display:inline-block;padding:5px 15px;background:white;font-family: 'Titillium Web', sans-serif;font-weight:300;color:#333;}

input[type="radio"]:checked + label {left:-17px;width:75px;background:tomato;}
input[type="radio"]:checked + label:before {font-size:2.5rem;top:15px;left:28px;}
input[type="radio"]:checked ~ figure img {
  -webkit-transform:translatex(0px);
  -moz-transform:translatex(0px);
  -ms-transform:translatex(0px);
  -o-transform:translatex(0px);
  transform:translatex(0px);
}
input[type="radio"]:checked ~ figure figcaption {
  -webkit-transform:translateX(0px);
  -moz-transform:translateX(0px);
  -ms-transform:translateX(0px);
  -o-transform:translateX(0px);
  transform:translateX(0px);
  z-index:8;
}
h2 {
  margin-top:150px;
  text-align:center;
  font-family: 'Titillium Web', sans-serif;
  font-weight:300;
  font-size:1.5rem;
}
h2 a {
  position:relative;
  color:tomato;
  text-decoration:none;
}
h2 a:after {
  content:'';
  position:absolute;
  bottom:-2px;
  left:0;
  width:0;
  height:1px;
  background:tomato;
  -webkit-transition:width .1s;
  -moz-transition:width .1s;
  -o-transition:width .1s;
  transition:width .1s;
}
h2 a:hover:after {
  width:100%;
}
body { background: #000000 url(header.jpg) no-repeat center top;}
html, body {
  width:100%;
  height:100%;
}

<div id="gal">
  <nav class="galnav">
    <ul>
      <li>
        <input type="radio" name="btn" value="one"/>
        <label for="btn" class="entypo-right-open-big"></label>
        <figure>
          <img src="tim_biskup.jpg"/>
          <figcaption>
            <h4>Tim Biskup</h4>
              <nav role='navigation'>
                <p>share this with your friends</p>
                <ul>
                  <li><a href="#" class="entypo-facebook-squared"></a></li>
                  <li><a href="#" class="entypo-twitter"></a></li>
                  <li><a href="#" class="entypo-gplus"></a></li>
                </ul>
              </nav>  
          </figcaption>
        </figure>
      </li>
      <li>
        <input type="radio" name="btn" value="two" checked="checked"/>
        <label for="btn" class="entypo-right-open-big"></label>
         <figure>
          <img src="brecht_vandenbroucke.jpg"/>
          <figcaption>
            <h4>Brecht Vandenbroucke</h4>
              <nav role='navigation'>
                <p>share this with your friends</p>
                <ul>
                  <li><a href="#" class="entypo-facebook-squared"></a></li>
                  <li><a href="#" class="entypo-twitter"></a></li>
                  <li><a href="#" class="entypo-gplus"></a></li>
                </ul>
              </nav>  
          </figcaption>
        </figure>
      </li>
      <li>
        <input type="radio" name="btn" value="three"/>
        <label for="btn" class="entypo-right-open-big"></label>
        <figure>
          <img src="andy_martin.jpg"/>
          <figcaption>
            <h4>Andy Martin</h4>
              <nav role='navigation'>
                <p>share this with your friends</p>
                <ul>
                  <li><a href="#" class="entypo-facebook-squared"></a></li>
                  <li><a href="#" class="entypo-twitter"></a></li>
                  <li><a href="#" class="entypo-gplus"></a></li>
                </ul>
              </nav>  
          </figcaption>
        </figure>
      </li>
      <li>
        <input type="radio" name="btn" value="four"/>
        <label for="btn" class="entypo-right-open-big"></label>
         <figure>
          <img src="diana_beltran_herrera.jpg"/>
          <figcaption>
            <h4>Diana Beltran Herrera</h4>
              <nav role='navigation'>
                <p>share this with your friends</p>
                <ul>
                  <li><a href="#" class="entypo-facebook-squared"></a></li>
                  <li><a href="#" class="entypo-twitter"></a></li>
                  <li><a href="#" class="entypo-gplus"></a></li>
                </ul>
              </nav>  
          </figcaption>
        </figure>
      </li>
    </ul>
  </nav>
</div>