.collapsible {
  cursor: pointer;
  padding: 0px 15px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 16px;
  color:#bb4444;
  text-decoration:none;
  margin-bottom:-0.3em;
  margin-top:0.1em;
}

.active, .collapsible:hover {
  color: #781d1d;
  text-decoration:underline;
}

.collapsible:after {
  content: '\002B';
  color: white;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.active:after {
  content: "\2212";
}