/* 1. Position & Hide text */
.hundred-days-of-code-ribbon {
  position: fixed;
  right: 0;
  top: 0;
  z-index: 9999;
  width: 12em;
  height: 12em;
  text-decoration: none;
  overflow: hidden;
  pointer-events: none;
  text-decoration: none;
  text-indent: -999999px;
  font: 700 1em Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 2. Ribbon */
.hundred-days-of-code-ribbon:before, .hundred-days-of-code-ribbon:after {
  content: "";
  position: absolute;
  top: 4em;
  right: -5em;
  width: 20em;
  height: 2.5em;
  display: block;
  background-color: black;

  -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);

  pointer-events: auto;
}

/* 3. Content */
.hundred-days-of-code-ribbon:after {
  content: "#100DaysOfCode : Day " attr(data-day);
  background-color: rgba(0, 0, 0, 0);
  color: white;
  line-height: 3.5em;
  text-decoration: none;
  text-align: center;
  text-indent: 0;
  font-size: 0.95em;
}