/* ---------------------------------------------------------------- subnav
 * templates/ui/subnav.html. The administration's pages left of the content
 * (WEB-NAV-04): the overview on top, then the groups - titles in micro
 * graphite, the entries in small slate, the active one ink with the red
 * underline every active navigation has (structural red, WEB-GRU-04;
 * nothing red runs vertically, MAR-ROT-07). On a phone the groups fold
 * behind one disclosure above the content that names the page you are on
 * (details/summary: no script, WEB-BEW-13). */
@layer ui {
.subnav-layout {
  display: grid; grid-template-columns: 11.5rem minmax(0, 1fr); gap: var(--s-7); align-items: start;
}
.subnav-layout__main { min-width: 0; }

.subnav { position: sticky; top: calc(var(--header-h) + var(--s-6)); padding-top: var(--s-2); }
.subnav__list--home { margin-bottom: var(--s-4); }
.subnav__group { margin-top: var(--s-4); padding-top: var(--s-4); border-top: 1px solid var(--rule-faint); }
.subnav__title { display: block; margin-bottom: var(--s-2); font-size: var(--t-micro); color: var(--text-secondary); }
.subnav__list { list-style: none; margin: 0; padding: 0; }
.subnav__link {
  display: inline-block; padding: var(--s-1) 0; font-size: var(--t-small); color: var(--slate);
  text-decoration: none; border-bottom: 2px solid transparent;
}
.subnav__link:hover { color: var(--text-primary); }
.subnav__link.is-active { color: var(--text-primary); border-bottom-color: var(--rule-brand); }
.subnav__link:focus-visible { outline: 2px solid var(--rule-brand); outline-offset: 3px; }

/* The phone's disclosure: hidden on a wide screen, where the groups stand. */
.subnav__fold { display: none; }
.subnav__fold-summary {
  display: flex; align-items: center; gap: var(--s-2); min-height: var(--ctl-h); cursor: pointer;
  padding: 0 var(--ctl-px); font-size: var(--t-small); color: var(--text-primary);
  border: 1px solid var(--rule-control); border-bottom-color: var(--rule-medium); list-style: none;
}
.subnav__fold-summary::-webkit-details-marker { display: none; }
.subnav__fold-summary::after { content: "\203A"; margin-left: auto; color: var(--text-secondary); }
.subnav__fold[open] .subnav__fold-summary::after { transform: rotate(90deg); }
.subnav__fold-summary:focus-visible { outline: 2px solid var(--rule-brand); outline-offset: 1px; }
.subnav__fold-label { font-size: var(--t-micro); color: var(--text-secondary); }
.subnav__fold-body { padding: var(--s-2) 0 var(--s-4); border-bottom: 1px solid var(--rule-fine); }
.subnav__fold-body .subnav__list--home { margin: var(--s-2) 0 0; }
.subnav__fold-body .subnav__group { margin-top: var(--s-3); padding-top: var(--s-3); }

@media (max-width: 900px) {
  .subnav-layout { grid-template-columns: minmax(0, 1fr); gap: var(--s-5); }
  .subnav { position: static; padding-top: 0; }
  .subnav__groups { display: none; }
  .subnav__fold { display: block; }
}
}  /* @layer ui */