@keyframes opentab {
  0% {
    right: -341.3333333333px;
  }
  100% {
    right: 0;
  }
}
@keyframes closetab {
  0% {
    right: 0;
  }
  100% {
    right: -341.3333333333px;
  }
}
#float-tab {
  position: fixed;
  width: 341.3333333333px;
  height: 50%;
  background-color: silver;
  padding: 0px;
  right: 0;
  bottom: 25%;
}

#float-tab {
  animation-name: closetab;
  animation-duration: 0.4s;
  animation-timing-function: linear;
  animation-iteration-count: 1;
  right: -341.3333333333px;
}

#float-tab.active {
  animation-name: opentab;
  animation-duration: 0.4s;
  animation-timing-function: linear;
  animation-iteration-count: 1;
  right: 0;
}

.selector {

  background-image: url(https://www.plusbeautylaser.com/en/side-tab/bg-10.jpg);background-repeat: no-repeat;
  position: absolute;
  width: 40px;
  height: 400px;
  background-color: silver;
  right: 100%;
  border-left: 3px solid #6F6F6F;
  border-right: 3px solid #6F6F6F;
  text-align: center;
  cursor: pointer;
}

#content {
  margin-right: 50px;
}

.tabtitle {
  text-align: center;
  padding: 20px 0;
  font: 2em "Helvetica" bold;
  border-bottom: 3px solid #6F6F6F;
  overflow: hidden;
}

.tabcontent {
  text-align: left;
  margin: 15px;
}

.tabcontent li {
  padding: 12px 12px 12px 0;
  font: 1.1em "Helvetica";
  border-bottom: 2px solid #F6F6F6;
  list-style: none;
}