.collapsible1 {
  background-color: #777;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.active3, .collapsible1:hover {
  background-color: #555;
}

.content1 {
  padding: 0 18px;
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
}

/*=============================*/ 

/*.user1 {
  background-color: #c70d0d;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.active, .user1:hover {
  background-color: #555;
}

.chapter1 {
  padding: 0 18px;
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
}*/