.page_toc {
  display: none;
  background: none;
  box-shadow: none;
  padding: 0 0.6rem 1rem;
  line-height: 1;
  transform: translateY(0);
  position: sticky;
  top: 120px;
  left: 0;
  width: 22rem;
  position: sticky;
  font-size: 1rem;
}

@media (max-width: 64rem) {
  .page_toc {
    transform: translateY(-1rem);
    transition: transform var(--transition);
    transition-behavior: allow-discrete;
  }
  .page_toc:popover-open {
    display: block;
    position: fixed;
    top: 2.5rem;
    left: calc(100vw - 22rem);
    width: 22rem;
    background: var(--color-white);
    border-radius: 0.8rem;
    box-shadow: 0 10px 30px 15px rgba(var(--rgb-black), 0.1);
    padding: 1rem 1rem 2rem 2rem;
    transform: translateY(0);
  }
}
@media (max-width: 48rem) {
  .page_toc:popover-open {
    left: 1rem;
    width: calc(100% - 2rem);
  }
}

@media (min-width: 64rem) {
  .page_toc {
    display: block;
    margin-left: 4rem;
    margin-right: var(--doc-padding);
  }
  .page_toc .top-link {
    display: none;
  }
}

@media (max-width: 120rem) {
  .page_toc {
    top: 136px;
  }
}

.page_toc h4 {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 1rem 0;
  padding: 0.5rem 0;
  color: var(--color-black);
}
.page_toc h4 a {
  text-decoration: none;
  display: flex;
  align-items: center;
}
.page_toc h4 a svg {
  margin-right: 0.5rem;
}

.page_toc-content {
  max-height: calc(100vh - 20rem);
  overflow-x: hidden;
  overflow-y: auto;
}

.page_toc-content::-webkit-scrollbar {
  width: 6px;
  background-color: #f5f5f5;
}
.page_toc-content::-webkit-scrollbar-track {
  background-color: #f5f5f5;
  border-radius: 6px;
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
}
.page_toc-content::-webkit-scrollbar-thumb {
  border-radius: 5px;
  background-image: -webkit-gradient(linear, left bottom, left top, color-stop(0.44, hsl(216, 57%, 50%)), color-stop(0.72, hsl(216, 57%, 40%)), color-stop(0.86, hsl(216, 57%, 30%)));
}

.page_toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page_toc li {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page_toc li.level--1 {
  display: none;
}
.page_toc li.level--3 {
  margin-left: 0.4rem;
}
.page_toc li.level--4 {
  margin-left: 1.4rem;
}
.page_toc li.level--5 {
  margin-left: 2.4rem;
}
.page_toc li:is(.level--3,.level--4,.level--5) {
  padding-left: 0.8rem;
  border-left: 1px solid var(--color-base-darkest);
}
.page_toc ul a  {
  display: block;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--color-gray);
  text-decoration: none;
  padding: 0.5em;
  margin: 0 -0.5em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: normal;
}
.page_toc ul li.level--2 a {
  font-weight: bold;
  font-size: 1.1rem;
}
.page_toc ul a:is(:focus,:hover) {
  color: var(--color-accent);
  padding-left: 0.7em;
}
.page_toc a.top-link {
  color: var(--color-accent);
  padding: 0.5em;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-base-darkest);
}

.page_toc--select {
  display: block;
  box-shadow: 0 0 0 1px rgba(var(--rgb-gray), 0.1);
  width: 100%;
  font-size: var(--font-size-small);
  letter-spacing: -0.01em;
  padding: 0.8em 0.5em;
  border: none;
  border-right: 0.5em solid transparent;
  border-radius: 0.4rem;
  background: var(--color-base);
  color: var(--color-gray-light);
  cursor: pointer;
}