Transparent Image Hover Overlay With Pure CSS/CSS3

A pure CSS/CSS3 technique to create an animated &  transparent overlay covering the image when hovered, which is good for creating compelling image caption hover effects for your gallery/portfolio website. Created by hugo.

How to use it:

Insert an image into your document.

<img class="media__image" src="1.jpg">

Add an overlay with text caption to the image.

<div class="media__body">
  <h2>Image Title</h2>
  <p>Description</p>
</div>

The whole markup would be something like this:

<div class="media"><img class="media__image" src="1.jpg">
  <div class="media__body">
    <h2>Image Title</h2>
    <p>Description</p>
  </div>
</div>

The required CSS/CSS3 styles.

.media {
  display: inline-block;
  position: relative;
  vertical-align: top;
}
.media__image { display: block; }
.media__body {
  background: rgba(41, 128, 185, 0.7);
  bottom: 0;
  color: white;
  font-size: 1em;
  left: 0;
  opacity: 0;
  overflow: hidden;
  padding: 3.75em 3em;
  position: absolute;
  text-align: center;
  top: 0;
  right: 0;
  -webkit-transition: 0.6s;
  transition: 0.6s;
}
.media__body:hover { opacity: 1; }
.media__body:after,
.media__body:before {
  border: 1px solid rgba(255, 255, 255, 0.7);
  bottom: 1em;
  content: '';
  left: 1em;
  opacity: 0;
  position: absolute;
  right: 1em;
  top: 1em;
  -webkit-transform: scale(1.5);
  -ms-transform: scale(1.5);
  transform: scale(1.5);
  -webkit-transition: 0.6s 0.2s;
  transition: 0.6s 0.2s;
}
.media__body:before {
  border-bottom: none;
  border-top: none;
  left: 2em;
  right: 2em;
}
.media__body:after {
  border-left: none;
  border-right: none;
  bottom: 2em;
  top: 2em;
}
.media__body:hover:after,
.media__body:hover:before {
  -webkit-transform: scale(1);
  -ms-transform: scale(1);
  transform: scale(1);
  opacity: 1;
}
.media__body h2 { margin-top: 0; }
.media__body p { margin-bottom: 1.5em; }