.toc {
  width: 530px;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  margin-top: 20px;
  margin-bottom: 20px;
  box-shadow: 0 0 5px -3px var(--black);
  padding: 10px 20px 0;
  border-radius: 5px;
  border-bottom: 3px solid var(--primary);
}
.toc li {
  margin-bottom: 15px !important;
  line-height: 1.2;
}
.toc li:last-child {
  margin-bottom: 0;
}
.toc_btn .icon + .icon {
  display: none;
  transform: rotate(180deg);
}
.opened .toc_btn .icon + .icon {
  display: block;
}
.opened .toc_btn .icon {
  display: none;
}
.opened .toc_content {
  height: auto;
}
li[tier="2"] ~ li[tier="3"] {
  margin-left: 25px;
}
.toc_heading {
  font-size: 15px;
}
.toc .toc_content {
  font-size: 16px;
  list-style-type: none;
  margin-top: 15px;
  margin-bottom: 5px;
  padding-left: 15px;
  height: 80px;
  overflow: hidden;
}
.opened .toc_content {
  height: auto;
}
.toc_btn .icon {
  width: 22px;
}
.toc_info_btn svg {
  width: 22px;
}
.toc_info_btn {
  all: unset;
  display: inline-block;
  line-height: 0;
  margin-left: 10px;
  cursor: pointer;
  transition: 0.3s transfrom ease-out;
}
.opened .toc_info_btn {
  transform: rotate(180deg);
}
.toc_btn {
  all: unset;
  cursor: pointer;
}
.toc_info {
  display: flex;
  align-items: center;
}
.toc_info_heading {
  font-size: 16px;
}