.fork-ribbon {
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  overflow: hidden;
  height: 200px;
  z-index: 9998;
}
.fork-ribbon a {
  position: absolute;
  box-sizing: border-box;
  top: 60px;
  right: -60px;
  width: 275px;
  z-index: 9999;
  padding: 0 40px;
  background: #333;
  color: #fff;
  text-decoration: none;
  font-family: arial, sans-serif;
  text-align: center;
  font-weight: bold;
  font-size: 16px;
  line-height: 32px;
  -webkit-transform: rotate(45deg);
      -ms-transform: rotate(45deg);
          transform: rotate(45deg);
  box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.8);
}
.fork-ribbon a:before,
.fork-ribbon a:after {
  content: "";
  width: 100%;
  display: block;
  position: absolute;
  top: 1px;
  left: 0;
  height: 1px;
  background: #fff;
}
.fork-ribbon a:after {
  bottom: 1px;
  top: auto;
}
.fork-ribbon a:hover {
  background: #25c;
}
.fork-ribbon a:hover + .fork-ribbon-logo {
  opacity: 1;
  pointer-events: auto;
  -webkit-transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
          transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
}
.fork-ribbon .fork-ribbon-logo {
  opacity: 0;
  position: absolute;
  z-index: 9997;
  width: 80px;
  height: 80px;
  pointer-events: none;
  -webkit-transform: translate3d(0, 10px, 0) rotate3d(1, 1, 1, 30deg);
          transform: translate3d(0, 10px, 0) rotate3d(1, 1, 1, 30deg);
  -webkit-transform-origin: 50% 100%;
      -ms-transform-origin: 50% 100%;
          transform-origin: 50% 100%;
  -webkit-transition: opacity 0.3s, -webkit-transform 0.3s;
          transition: opacity 0.3s, transform 0.3s;
}
.fork-ribbon .fork-ribbon-logo img {
  position: absolute;
  z-index: 9997;
  left: 100%;
  margin-left: 50px;
  bottom: 50%;
  margin-bottom: -30px;
}