.pen {
  max-width: 635px;
  width: 100%;
  margin: 0px auto ;
  padding: 4%;
  
  opacity: 0;
  position: relative;
  -webkit-transition: all 0.25s ease-in-out;
  -moz-transition: all 0.25s ease-in-out;
  -ms-transition: all 0.25s ease-in-out;
  -o-transition: all 0.25s ease-in-out;
  transition: all 0.25s ease-in-out;
  -webkit-animation: 1s appear 1 forwards;
  -moz-animation: 1s appear 1 forwards;
  -o-animation: 1s appear 1 forwards;
  animation: 1s appear 1 forwards;
}

.stage {
  max-width: 635px;
  width: 100%;
  height: 400px;
  -webkit-transition: all 0.25s ease-in-out;
  -moz-transition: all 0.25s ease-in-out;
  -ms-transition: all 0.25s ease-in-out;
  -o-transition: all 0.25s ease-in-out;
  transition: all 0.25s ease-in-out;
}
.element {
  background: green;
  width: 202px;
  -webkit-transform-origin: 50% 50%;
  height: inherit;
  margin: 0 7px 0 0;
  display: inline-block;
  -webkit-transition: all 0.25s ease-in-out;
  -moz-transition: all 0.25s ease-in-out;
  -ms-transition: all 0.25s ease-in-out;
  -o-transition: all 0.25s ease-in-out;
  transition: all 0.25s ease-in-out;
  -webkit-transform: translate3d(0, 0, 0);
  -moz-transform: translate3d(0, 0, 0);
  -ms-transform: translate3d(0, 0, 0);
  -o-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
}
.element.active {
  width: 282px;
  -webkit-transition: all 0.25s ease-in-out;
  -moz-transition: all 0.25s ease-in-out;
  -ms-transition: all 0.25s ease-in-out;
  -o-transition: all 0.25s ease-in-out;
  transition: all 0.25s ease-in-out;
}
.element.inactive {
  width: 162px;
  -webkit-transition: all 0.25s ease-in-out;
  -moz-transition: all 0.25s ease-in-out;
  -ms-transition: all 0.25s ease-in-out;
  -o-transition: all 0.25s ease-in-out;
  transition: all 0.25s ease-in-out;
  opacity: 0.4;
}
.element.tech {
  background: url('../images/tech.jpg') 25% 0 no-repeat;
  background-size: cover;
}
.element.cult {
  background: url('../images/cult.jpg') 25% 0 no-repeat;
  background-size: cover;
}
.element.misc {
  background: url('../images/misc.jpg') 25% 0 no-repeat;
  background-size: cover;
}
.element.spo {
  background: url('../images/sports.jpg') 25% 0 no-repeat;
  background-size: cover;
}
.element:last-of-type {
  margin: 0;
}
@media all and (min-width: 900px) {
  .pen {
    max-width: 890px;
  }
  .element {
    width: 186px;
  }
  .element.inactive {
    width: 146px;
  }
  .element.active {
    width: 366px;
  }
  .stage {
    max-width: 890px;
    height: 600px;
  }
}
@media all and (max-width: 660px) {
  .pen {
    max-width: 335px;
  }
  .element {
    width: 101px;
    transform: translate(0%, 20%)
  }

  .element.inactive {
    width: 61px;
  }
  .element.active {
    width: 181px;
  }
  .stage {
    max-width: 335px;
  }
}
@-webkit-keyframes appear {
  15% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-moz-keyframes appear {
  15% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-o-keyframes appear {
  15% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes appear {
  15% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}