.topbar {
  gap: 24px;
}
.page-navigation {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}
.page-navigation-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  color: var(--accent);
  flex-shrink: 0;
}
.page-navigation-icon .icon {
  width: 17px;
  height: 17px;
}
.page-navigation-copy {
  min-width: 0;
}
.page-navigation-scope {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 9px;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--muted);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.page-navigation-detail {
  font-size: 10px;
  letter-spacing: 0;
  font-weight: 450;
}
.page-navigation-detail::before {
  content: "·";
  margin-right: 10px;
  color: var(--accent);
}
.page-navigation-trail {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  margin: 2px 0 0;
  list-style: none;
  min-width: 0;
  font-size: 13px;
  line-height: 1.4;
}
.page-navigation-parent {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 0 1 auto;
  color: var(--muted);
}
.page-navigation-parent a {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}
.page-navigation-parent a:hover {
  color: var(--accent);
}
.page-navigation-parent .icon {
  width: 11px;
  height: 11px;
  color: var(--muted);
}
.page-navigation-current {
  color: var(--ink);
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 70px;
}
.topbar-tools {
  flex-shrink: 0;
}
@media (max-width: 1100px) {
  .page-navigation-detail,
  .page-navigation-parent:nth-last-child(n + 3) {
    display: none;
  }
  .page-navigation-parent a {
    max-width: 125px;
  }
}
@media (max-width: 700px) {
  .topbar {
    gap: 12px;
    padding: 0 16px;
  }
  .page-navigation-icon,
  .page-navigation-parent {
    display: none;
  }
  .page-navigation-scope {
    font-size: 8px;
  }
  .page-navigation-current {
    font-size: 12px;
    min-width: 0;
  }
  .page-navigation {
    margin-right: auto;
  }
  .topbar-tools {
    margin-left: 0;
  }
}