/* Layout 1 — fixed sidebar with the full menu tree, always visible. */

body.layout-sidebar .layout-shell {
  display: flex;
  /* Not flex-start: stretch (the default, stated explicitly here) is what
     lets .site-nav fill exactly however tall .layout-shell actually ends up
     being — see base.css's sticky-footer flex column on body — instead of
     the nav needing its own hard-coded `100vh - header-height` height,
     which forced that much vertical space to exist even on a short page,
     pushing the footer below the fold until you scrolled for it. */
  align-items: stretch;
}

body.layout-sidebar .site-nav {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
  border-right: 1px solid var(--color-border, var(--color-secondary, #e5e5e5));
  padding: 1.5rem 1rem;
  background: var(--color-sidebar-bg, var(--color-bg, #ffffff));
}

body.layout-sidebar .nav-sublist {
  padding-left: 1rem;
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

body.layout-sidebar .page-content {
  flex: 1;
  min-width: 0;
  /* Deliberately no auto-centering here: content sits right up against the
     sidebar (its own base.css padding is the only gap), not floated away
     from it — any leftover space on wide viewports lands after the content
     (right edge), not before it. */
}