.sidebar_first,
.sidebar_second {
  position: sticky;
  top: 0;
  overflow-y: auto;
  max-width: 240px;
}

.sidebar_first h2,
.sidebar_second h2 {
  font-size: 1.4em;
}

.sidebar_first {
  height: 100hv;
}

.sidebar_second {
  height: fit-content;
}