/* First make sure the video thumbnail images are responsive. */

img {
  max-width: 100%;
  height: auto;
}

/* 
This is the starting grid for each video with thumbnails 4 across for the largest screen size.
It's important to use percentages or there may be gaps on the right side of the page. 
*/

.video {
  background: #fff;
  padding-bottom: 20px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15);
  width: 23%; /* Thumbnails 4 across */
  margin: 1%;
  float: left;
}

/* 
These styles keep the height of each video thumbnail consistent between YouTube and Vimeo. 
Each can have thumbnail sizes that vary by 1px and are likely break your layout. 
*/

.video figure {
  height: 0;
  padding-bottom: 56.25%;
  overflow: hidden;
}

.video figure a {
  display: block;
  margin: 0;
  padding: 0;
  border: none;
  line-height: 0;
}

/* Media Queries - This is the responsive grid. */

@media (max-width: 1024px) {
  .video {
    width: 31.333%; /* Thumbnails 3 across */
  }
}

@media (max-width: 600px) {
  .video {
    width: 48%; /* Thumbnails 2 across */
  }
}

@media (max-width: 360px) {
  .video {
    display: block;
    width: 96%; /* Single column view. */
    margin: 2%; /* The smaller the screen, the smaller the percentage actually is. */
    float: none;
  }
}

/* These are my preferred rollover styles. */

.video img {
  width: 100%;
  opacity: 1;
}

.video img:hover, .video img:active, .video img:focus {
  opacity: 0.75;
}