html {
  scroll-padding-top: 5.5rem;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--background);
  width: min(64rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  min-height: 4.5rem;
  border-bottom: 1px solid var(--line);
}
.shell > .site-header {
  width: 100%;
  max-width: 64rem;
}
.site-header .brand {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-decoration: none;
  text-transform: uppercase;
}
.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 650;
}
.home-shell {
  width: min(80rem, calc(100% - 2rem));
}
.page-layout {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 3rem;
}
.page-directory {
  padding-top: clamp(3rem, 7vw, 5.5rem);
}
.page-directory nav {
  position: sticky;
  top: 6.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding-left: 1rem;
  border-left: 1px solid var(--line);
}
.page-directory strong {
  color: var(--muted);
}
.page-layout main {
  min-width: 0;
}
@media (max-width: 70rem) {
  .home-shell {
    width: min(64rem, calc(100% - 2rem));
  }
  .page-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .page-directory {
    padding-top: 2rem;
  }
  .page-directory nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .page-directory strong {
    flex-basis: 100%;
  }
}
@media (max-width: 44rem) {
  html {
    scroll-padding-top: 8rem;
  }
  .site-header {
    flex-wrap: wrap;
    padding: 0.9rem 0;
  }
  .site-header nav {
    gap: 0.5rem 0.85rem;
  }
}