.collapsible {
}

.collapsible-button {
  display: block;
  background-color: #efefef;
  width: 100%;
  margin: 0;
  border: none;
  border-radius: 4px;
  outline: none;
  padding: 10px;
  text-align: left;
  font-size: var(--main-font-size);
  font-family: var(--main-font-style);
}

.collapsible-button span {
  position: relative;
  width: 100%;
  display: inline-block;
}

.collapsible-button span:after {
  content: '˅';
  position: absolute;
  top: -0.2em;
  right: 0;
  font-size: 1.5em;
}

.expanded .collapsible-button span:after {
  content: '˄';
}

.collapsible-content {
  transition: all 0.5s;
  background-color: #efefef;
  text-align: justify;

  opacity: 0;
  font-size: 0;
  padding: 0;
  height: 0;
}

.expanded .collapsible-content {
  padding: 1em;
  opacity: 1;
  font-size: 1em;
  height: auto;
}