/* Shared visible return-home affordance for legacy and utility page headers. */
.site-return-shell {
  position: relative;
}

.site-return-shell .brand-copy {
  min-width: 0;
}

.site-return-shell .brand-copy strong,
.site-return-shell .brand-copy small {
  white-space: normal;
}

.site-return-shell .site-home-return {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--line, rgba(23, 55, 74, 0.24));
  color: var(--forest, var(--blue, #17374a));
  background: var(--paper, var(--about-surface, #f5f7f6));
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.site-return-shell .site-home-return:hover {
  border-color: var(--forest, var(--blue, #17374a));
  color: var(--white, #ffffff);
  background: var(--forest, var(--blue, #17374a));
}

@media (min-width: 981px) {
  .nav-shell.site-return-shell {
    grid-template-columns: minmax(340px, 0.9fr) auto minmax(0, 1.5fr);
  }

  .nav-shell.site-return-shell .site-nav {
    grid-column: 3;
    flex-wrap: wrap;
    align-content: center;
  }

  .nav-shell.site-return-shell .site-nav > a {
    min-height: 44px;
    flex-shrink: 0;
  }
}

@media (max-width: 980px) {
  .site-return-shell {
    gap: 12px;
  }

  .nav-shell.site-return-shell {
    align-items: center;
  }

  .site-return-shell > .brand {
    min-width: 0;
    flex: 1 1 auto;
  }

  .site-return-shell .nav-toggle {
    flex: 0 0 44px;
    width: 44px;
    min-width: 44px;
    height: 44px;
  }
}

@media (max-width: 390px) {
  .site-return-shell .site-home-return {
    padding-inline: 8px;
    font-size: 12px;
  }

  .site-return-shell .brand-copy small {
    display: none;
  }
}

@media (max-width: 360px) {
  .site-return-shell .site-home-return {
    padding-inline: 6px;
    font-size: 11px;
  }
}

/* ChuanDa keeps its own visual system and two-action header. */
.chuanda-home-page .site-return-shell {
  grid-template-columns: minmax(0, auto) auto minmax(0, 1fr) auto;
}

.chuanda-home-page .site-return-shell nav {
  grid-column: 3;
}

.chuanda-home-page .site-return-shell > .button {
  grid-column: 4;
}

@media (max-width: 960px) {
  .chuanda-home-page .site-return-shell {
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .chuanda-home-page .site-return-shell nav {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .chuanda-home-page .site-return-shell > .button {
    grid-column: 3;
    grid-row: 1;
  }
}