style.css

#dex-sign {
  display: inline-block;
  margin: 30px 10px 15px 10px;
  width: 255px;
  height: 84px;
  background: url(./segnature.png) no-repeat;
}
#dex-sign.play {
  -moz-animation: sign-anim 3.5s 0.2s steps(85) forwards;
  -o-animation: sign-anim 3.5s 0.2s steps(85) forwards;
  -webkit-animation: sign-anim 3.5s 0.2s steps(85) forwards;
  animation: sign-anim 3.5s 0.2s steps(85) forwards;
}
@-webkit-keyframes sign-anim {
  to {
    background-position: 0 -7140px;
  }
}
@-moz-keyframes sign-anim {
  to {
    background-position: 0 -7140px;
  }
}
@keyframes sign-anim {
  to {
    background-position: 0 -7140px;
  }
}
/* Layout */
* {
  margin: 0;
  padding: 0;
}
body,
html {
  font-size: 1em;
  height: 98vh;
  overflow: hidden;
  font-family: Tahoma, Verdana, Arial, sans-serif;
  background-color: #222222;
}
::selection {
  background: #00000030;
}
::-moz-selection {
  background: #00000030;
}
section {
  height: 100%;
  min-height: 335px;
  background-color: #222222;
  background-image: radial-gradient(center top, circle cover, #222222, #000000);
  background-image: -o-radial-gradient(center top, circle cover, #222222, #000000);
  background-image: -ms-radial-gradient(center top, circle cover, #222222, #000000);
  background-image: -moz-radial-gradient(center top, circle cover, #222222, #000000);
  background-image: -webkit-radial-gradient(center top, circle cover, #222222, #000000);
  text-align: center;
  position: relative;
  margin: 10px;
}
section:before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  min-height: 335px;
  pointer-events: none;
  opacity: 0.3;
}
section .quote {
  position: absolute;
  left: 20vw;
  right: 20vw;
  top: 0;
  bottom: 0;
  margin: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
section .quote cite {
  color: #999;
  font-family: Tahoma, Verdana, Arial, sans-serif;
  letter-spacing: 0.1em;
  text-align: center;
  line-height: 110%;
  font-size: 1.7em;
  font-variant: small-caps;
}
section .quote cite:before {
  content: '’’';
  position: absolute;
  left: -100px;
  pointer-events: none;
  font-size: 8em;
  text-align: left;
  font-family: Arial;
  letter-spacing: -16px;
  font-style: normal;
  font-weight: bold;
  color: rgba(123, 154, 185, 0.2);
}
section .quote #dex-sign {
  position: relative;
  cursor: pointer;
  top: 20px;
  right: 0;
}