gh-fork-ribbon.css

/*!
 * "Fork me on GitHub" CSS ribbon v0.2.3 | MIT License
 * https://github.com/simonwhitaker/github-fork-ribbon-css
*/

.github-fork-ribbon {
  width: 12.1em;
  height: 12.1em;
  position: absolute;
  overflow: hidden;
  top: 0;
  right: 0;
  z-index: 9999;
  pointer-events: none;
  font-size: 13px;
  text-decoration: none;
  text-indent: -999999px;
}

.github-fork-ribbon.fixed {
  position: fixed;
}

.github-fork-ribbon:hover, .github-fork-ribbon:active {
  background-color: rgba(0, 0, 0, 0.0);
}

.github-fork-ribbon:before, .github-fork-ribbon:after {
  /* The right and left classes determine the side we attach our banner to */
  position: absolute;
  display: block;
  width: 15.38em;
  height: 1.54em;

  top: 3.23em;
  right: -3.23em;

  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;

  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}

.github-fork-ribbon:before {
  content: "";

  /* Add a bit of padding to give some substance outside the "stitching" */
  padding: .38em 0;

  /* Set the base colour */
  background-color: #a00;

  /* Set a gradient: transparent black at the top to almost-transparent black at the bottom */
  background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(0, 0, 0, 0)), to(rgba(0, 0, 0, 0.15)));
  background-image: -webkit-linear-gradient(top, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.15));
  background-image: -moz-linear-gradient(top, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.15));
  background-image: -ms-linear-gradient(top, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.15));
  background-image: -o-linear-gradient(top, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.15));
  background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.15));

  /* Add a drop shadow */
  -webkit-box-shadow: 0 .15em .23em 0 rgba(0, 0, 0, 0.5);
  -moz-box-shadow: 0 .15em .23em 0 rgba(0, 0, 0, 0.5);
  box-shadow: 0 .15em .23em 0 rgba(0, 0, 0, 0.5);

  pointer-events: auto;
}

.github-fork-ribbon:after {
  /* Set the text from the data-ribbon attribute */
  content: attr(data-ribbon);

  /* Set the text properties */
  color: #fff;
  font: 700 1em "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.54em;
  text-decoration: none;
  text-shadow: 0 -.08em rgba(0, 0, 0, 0.5);
  text-align: center;
  text-indent: 0;

  /* Set the layout properties */
  padding: .15em 0;
  margin: .15em 0;

  /* Add "stitching" effect */
  border-width: .08em 0;
  border-style: dotted;
  border-color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.github-fork-ribbon.left-top, .github-fork-ribbon.left-bottom {
  right: auto;
  left: 0;
}

.github-fork-ribbon.left-bottom, .github-fork-ribbon.right-bottom {
  top: auto;
  bottom: 0;
}

.github-fork-ribbon.left-top:before, .github-fork-ribbon.left-top:after, .github-fork-ribbon.left-bottom:before, .github-fork-ribbon.left-bottom:after {
  right: auto;
  left: -3.23em;
}

.github-fork-ribbon.left-bottom:before, .github-fork-ribbon.left-bottom:after, .github-fork-ribbon.right-bottom:before, .github-fork-ribbon.right-bottom:after {
  top: auto;
  bottom: 3.23em;
}

.github-fork-ribbon.left-top:before, .github-fork-ribbon.left-top:after, .github-fork-ribbon.right-bottom:before, .github-fork-ribbon.right-bottom:after {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}