<section class="gallery">
<div class="gallery__item">
<input type="radio" id="img-1" checked name="gallery" class="gallery__selector"/>
<img class="gallery__img" src="https://i.picsum.photos/id/1015/600/400.jpg" alt=""/>
<label for="img-1" class="gallery__thumb"><img src="https://i.picsum.photos/id/1015/150/100.jpg" alt=""/></label>
</div>
<div class="gallery__item">
<input type="radio" id="img-2" name="gallery" class="gallery__selector"/>
<img class="gallery__img" src="https://i.picsum.photos/id/1039/600/400.jpg" alt=""/>
<label for="img-2" class="gallery__thumb"><img src="https://i.picsum.photos/id/1039/150/100.jpg" alt=""/></label>
</div>
<div class="gallery__item">
<input type="radio" id="img-3" name="gallery" class="gallery__selector"/>
<img class="gallery__img" src="https://i.picsum.photos/id/1057/600/400.jpg" alt=""/>
<label for="img-3" class="gallery__thumb"><img src="https://i.picsum.photos/id/1057/150/100.jpg" alt=""/></label>
</div>
<div class="gallery__item">
<input type="radio" id="img-4" name="gallery" class="gallery__selector"/>
<img class="gallery__img" src="https://i.picsum.photos/id/106/600/400.jpg" alt=""/>
<label for="img-4" class="gallery__thumb"><img src="https://i.picsum.photos/id/106/150/100.jpg" alt=""/></label>
</div>
</section>
* {
box-sizing: border-box;
}
img {
max-width: 100%;
vertical-align: top;
}
.gallery {
display: flex;
margin: 10px auto;
max-width: 600px;
position: relative;
padding-top: 66.6666666667%;
}
@media screen and (min-width: 600px) {
.gallery {
padding-top: 400px;
}
}
.gallery__img {
position: absolute;
top: 0;
left: 0;
opacity: 0;
transition: opacity 0.3s ease-in-out;
}
.gallery__thumb {
padding-top: 6px;
margin: 6px;
display: block;
}
.gallery__selector {
position: absolute;
opacity: 0;
visibility: hidden;
}
.gallery__selector:checked + .gallery__img {
opacity: 1;
}
.gallery__selector:checked ~ .gallery__thumb > img {
box-shadow: 0 0 0 3px #0be2f6;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.