.et_pb_toggle .et_pb_toggle_title:before {
    right: 0;
    left: auto;
  position: absolute;
}
.et_pb_toggle_open .et_pb_toggle_title:before {
  display: none;
}
.et_pb_toggle_close {
    padding: 20px 0;
}
.et_pb_accordion .et_pb_toggle {
    margin-bottom: 10px;
    position: relative;
}
.et_pb_toggle_content {
  padding-bottom: 30px;
}
.chapter_description {
  padding: 20px 0;
}
iframe {
  display: inline-block;
  width:100%;
  /*height: auto;*/
  /*padding-bottom: 20% !important;*/
}
@media screen and (max-width: 640px) {
  iframe {
	display: inline-block;
	width:100%;
	height: auto;
	
  }
}