libreboot-website/site/common/css/cssbox/cssbox.css

/* The work below, CSSBox, is released under the Creative Commons Zero 1.0 license
   and is available on https://notabug.org/SylvieLorxu/CSSBox */
span.cssbox_full {
  position: fixed;
  height: 100%;
  width: 100%;
  background-color: rgba(0,0,0,0.8);
  top: 0;
  left: 0;
  opacity: 0;
  visibility: hidden;
  transition: visibility 0s, opacity 0.5s linear;
}

span.cssbox_full img {
  position: fixed;
  background-color: white;
  margin: 0;
  padding: 0;
  max-height: 90%;
  max-width: 90%;
  top: 50%;
  left: 50%;
  margin-right: -50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 20px black;
}

img.cssbox_thumb:focus + span.cssbox_full {
  visibility: visible;
  opacity: 1;
}

img.cssbox_thumb, span.cssbox_full {
  cursor: pointer;
}
/* The work above, CSSBox, is released under the Creative Commons Zero 1.0 license
   and is available on https://notabug.org/SylvieLorxu/CSSBox */