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<div class='gallery'>
<input checked='' id='ind-1' name='gallery' type='radio'>
<label for='ind-1'></label>
</input>
<input id='ind-2' name='gallery' type='radio'>
<label for='ind-2'></label>
</input>
<input id='ind-3' name='gallery' type='radio'>
<label for='ind-3'></label>
</input>
<ul class='gallery-images'>
<li class='gallery-item'>
<label for='ind-1'>
<img src='http://25.media.tumblr.com/42398e2ce1fe4c264db448a8ce2f8caf/tumblr_mhkd1xJ6N81qkegsbo1_500.png'>
</label>
</li>
<li class='gallery-item'>
<label for='ind-2'>
<img src='http://25.media.tumblr.com/2f638a7a862b55af7e9757ccb8308739/tumblr_mhkd5kf3vf1qkegsbo1_500.jpg'>
</label>
</li>
<li class='gallery-item'>
<label for='ind-3'>
<img src='http://25.media.tumblr.com/22d4b1e8b40a127df8061575eec00a08/tumblr_mhi8o0CVvE1qkegsbo1_500.jpg'>
</label>
</li>
</ul>
</div>
<div id='credit'>
Images from
<a href='http://www.theultralinx.com'>
The Ultralinx
</a>
</div>

div, ul, li, img {
box-sizing: border-box;
}

body {
background-color: #e8e8e8;
text-align: center;
}

.gallery {
width: 400px;
overflow: hidden;
border: 1px solid #aaa;
margin: 20px auto;
padding: 20px;
background-image: radial-gradient(#aaaaaa 0%, #666666 90%, #555555 100%);
}

.gallery-images {
width: 1200px;
text-align: left;
position: relative;
padding: 0;
margin: 0;
transition: left 0.5s;
}

.gallery-item {
display: inline;
}
.gallery-item img {
width: 300px;
height: 200px;
padding: 0;
margin: 10px 0;
border: 1px solid #aaa;
cursor: pointer;
}
.gallery-item:not(:first-child) img {
margin-left: 10px;
}
.gallery-item:first-child img {
margin-left: 30px;
}

.gallery input {
display: none;
}

.gallery input + label {
background-color: #aaa;
height: 6px;
width: 24px;
display: inline-block;
border: 1px solid #444;
cursor: pointer;
transition: all 0.5s;
}
.gallery input + label:hover {
box-shadow: 0 0 3px 0 #555;
}

.gallery input:checked + label {
background-color: #f1f1f1;
}

.gallery #ind-1:checked ~ .gallery-images {
left: 0;
}

.gallery #ind-2:checked ~ .gallery-images {
left: -310px;
}

.gallery #ind-3:checked ~ .gallery-images {
left: -620px;
}

#credit {
font-family: "Calibri";
}
#credit a {
color: #000;
}