body {
  background: #ECF0F1;
  font-family: "Open Sans Condensed", sans-serif;
  height: 100%;
}

a {
  text-decoration: none;
}

header {
  margin-bottom: 2em;
  text-align: center;
}

h1, h2 {
  margin: 0;
  padding: 0;
}

h1 {
  color: #8E44AD;
}

h2 {
  color: #BDC3C7;
  font-size: 18px;
  font-weight: 300;
}

#platform {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 7px;
  height: 7px;
  margin: 0 auto;
  position: relative;
  top: 80px;
  width: 1000px;
  z-index: 0;
  -webkit-transform: skewX(45deg);
  -moz-transform: skewX(45deg);
  -ms-transform: skewX(45deg);
  transform: skewX(45deg);
  -webkit-transition: background-color 1s;
  -moz-transition: background-color 1s;
  -ms-transition: background-color 1s;
  transition: background-color 1s;
}
#platform.active {
  background: rgba(142, 68, 173, 0.3);
}

#track {
  bottom: 0;
  height: 100px;
  margin: 0 auto;
  left: 0;
  position: relative;
  right: 0;
  top: 70px;
  width: 1000px;
  z-index: 100;
}
#track #orb {
  background: #8e44ad;
  border-radius: 50%;
  box-shadow: inset -5px -10px 1px #7f3d9b;
  bottom: 30px;
  height: 100px;
  position: absolute;
  text-align: center;
  bottom: 0;
  width: 100px;
  z-index: 200;
  -webkit-transition: bottom 0.5s ease-in-out;
  -moz-transition: bottom 0.5s ease-in-out;
  -ms-transition: bottom 0.5s ease-in-out;
  transition: bottom 0.5s ease-in-out;
}
#track #orb:after {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 50%;
  bottom: -22.5px;
  content: "";
  display: block;
  height: 16.66667px;
  margin: 0 auto;
  left: 0;
  position: absolute;
  right: 0;
  width: 66.66667px;
  -webkit-transition: height 0.5s ease-in-out, width 0.5s ease-in-out;
  -moz-transition: height 0.5s ease-in-out, width 0.5s ease-in-out;
  -ms-transition: height 0.5s ease-in-out, width 0.5s ease-in-out;
  transition: height 0.5s ease-in-out, width 0.5s ease-in-out;
}
#track #orb.hover {
  bottom: 10px;
}
#track #orb.hover:after {
  bottom: -20px;
  height: 0;
  width: 0;
}

.panel {
  align-items: center;
  flex-direction: row;
  margin: 0 auto;
  justify-content: center;
  position: relative;
  top: 0;
  width: 1000px;
  display: -webkit-box;
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flexbox;
  display: flex;
}
.panel .button {
  background: transparent;
  color: #333;
  font-weight: 300;
  padding: 0.5em 0;
  margin: 0.5em 0;
  text-align: center;
  -webkit-box-flex: 1;
  -webkit-flex: 1;
  -moz-box-flex: 1;
  -moz-flex: 1;
  -ms-flex: 1;
  flex: 1;
}
.panel .button:hover {
  cursor: pointer;
}
.panel .button:hover > span {
  background: #9B59B6;
}
.panel .button.active > span, .panel .button:active > span {
  background: #8E44AD;
}
.panel .button span {
  background: #BDC3C7;
  border-radius: 50%;
  display: block;
  height: 10px;
  margin: 0 auto;
  width: 10px;
}