body {
  padding: 2em;
  background-color: #f5f5f5;
  color: #444;
}
.nav {
  list-style-type: none;
  margin: 0;
  padding: 0;
}
.nav .nav-item {
  padding: 1em 1em;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.nav .nav-item + .nav-item {
  border-top: 1px solid #ddd;
}
.video-descrip.is-active {
  border: 1px solid #ddd;
  padding: .5em .5em;
  margin: .5em;
}
.video-descrip.is-collapsed {
  margin-top: 0;
  height: 0 !important;
  border: none;
  visibility: hidden;
}
.nav .nav-item a {
  text-decoration: none;
  color: #4E9428;
}
.nav .nav-item a:hover,
.nav .nav-item a:focus {
  color: #c76712;
}
.nav .nav-item .nav-indicator {
  position: absolute;
  right: 1em;
}
.nav-label {
  font-size: 1.3em;
}
.nav-label a:link {
  font-size: .8em;
}
.nav--primary {
  border: 1px solid #ddd;
  margin-bottom: 2em;
}
.nav--primary .nav-item.is-active path {
  stroke-dashoffset: -15;
}
.nav--secondary {
  overflow: hidden;
  margin-top: 1em;
  will-change: height;
  transition: height 0.3s, margin-top 0.3s;
}
.is-collapsed .nav--secondary {
  margin-top: 0;
  height: 0 !important;
}
.is-collapsed .nav-item--secondary {
  margin-top: 0;
  height: 0 !important;
}
.nav--secondary .nav-item {
  padding: 0.3em 1em;
}
.nav--secondary .nav-item + .nav-item {
  border: none;
}
.nav--primary svg.nav-indicator path {
  fill: none;
  stroke: #aaa;
  stroke-linecap: round;
  stroke-width: 2;
  stroke-dasharray: 29 40;
  transition: stroke-dashoffset 0.3s;
}
.nav--alt svg.nav-indicator--alt {
  -webkit-transform: translateY(-20%);
          transform: translateY(-20%);
  transition: -webkit-transform 0.2s;
  transition: transform 0.2s;
  transition: transform 0.2s, -webkit-transform 0.2s;
}
.nav--alt svg.nav-indicator--alt path {
  fill: none;
  stroke: #aaa;
  stroke-linecap: square;
  stroke-width: 2;
  stroke-dasharray: 14 40;
  stroke-dashoffset: -15;
  transition: stroke-dashoffset 0.3s;
}
.nav--alt .nav-item.is-active svg {
  -webkit-transform: translateY(0);
          transform: translateY(0);
}
.nav--alt .nav-item.is-active svg path {
  stroke-dashoffset: 0;
}
.material-icons.descrip-button
{
  font-size: 24px;

}