/* nav-dropdown.css — disclosure-button dropdowns for the `nav` block.
   Member-facing chrome. Hover-open on pointer devices, focus-open via JS,
   inline expansion on touch / narrow viewports. */

.nav-item-wrap {
  position: relative;
  display: inline-flex;
  /* No align-items here: let the inner <a class="nav-link nav-parent"> stretch
     to the same cross-axis height as its plain `.nav-link` siblings in the
     `.nav-links` flex row. With `align-items: center` (previous value) the
     link shrunk to its content height and centered, which pushed its text
     ~11px lower than the rest of the nav. */
}

/* `.nav-link.nav-parent` is the <a> inside the wrap (when the parent has its
   own href). Inherit `.nav-link`'s `display: block` + padding so the text
   baseline matches plain sibling links. We don't need flex here — there's
   no chevron INSIDE this <a>; the chevron is a sibling button next to it. */
.nav-link.nav-parent {
  border: none;
  background: none;
  font-family: inherit;
  cursor: pointer;
}

/* `.nav-link.nav-parent-button` is the <button> case (no href). Text and the
   inline <span class="nav-chevron"> sit beside each other naturally because
   the span is inline. Default button display + the inherited padding line
   the text up with siblings. */
.nav-link.nav-parent-button {
  display: inline-block;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
}

.nav-link.nav-parent-button > .nav-chevron {
  margin-left: 0.25rem;
}

/* The separate chevron toggle button. Sized 32x32 (a11y tap target) but
   inline-block + vertical-align so the ▾ glyph aligns with the adjacent
   <a>'s text rather than centering inside the row's full height. */
.nav-chevron-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  min-width: 2rem;
  min-height: 2rem;
  padding: 0.25rem;
  margin-left: -0.25rem;
  background: none;
  border: none;
  border-radius: var(--radius);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  align-self: center;
}

.nav-chevron-toggle:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.nav-chevron {
  font-size: 0.75rem;
  line-height: 1;
  transition: transform 150ms ease;
  display: inline-block;
}

.nav-chevron-toggle[aria-expanded="true"] .nav-chevron,
.nav-link.nav-parent-button[aria-expanded="true"] .nav-chevron {
  transform: rotate(180deg);
}

.nav-dropdown {
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
}

.nav-dropdown[hidden] {
  display: none;
}

.nav-dropdown li {
  list-style: none;
}

.nav-menuitem {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.nav-menuitem:hover,
.nav-menuitem:focus {
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
}

.nav-menuitem.active {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
}

[data-theme="dark"] .nav-menuitem.active {
  color: #fff;
  background: rgba(99, 102, 241, 0.35);
}

/* Desktop / pointer devices: absolute-positioned fly-out, hover + focus open */
@media (hover: hover) and (pointer: fine) {
  .nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 12rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    z-index: 50;
    /* Zero gap between trigger and menu — cursor must not cross dead space. */
    margin-top: 0;
  }

  .nav-dropdown-nested {
    position: absolute;
    top: 0;
    left: 100%;
    margin-left: 0.25rem;
  }

  .nav-dropdown-parent {
    position: relative;
  }

  /* Hover-open: keep open while cursor is on trigger or inside menu.
     `.nav-suppress-hover` is added briefly when JS closes the menu (Escape /
     click-outside) so the close feels immediate even while still hovering. */
  .nav-item-wrap:not(.nav-suppress-hover):hover > .nav-dropdown,
  .nav-item-wrap:not(.nav-suppress-hover):focus-within > .nav-dropdown,
  .nav-dropdown-parent:not(.nav-suppress-hover):hover > .nav-dropdown-nested,
  .nav-dropdown-parent:not(.nav-suppress-hover):focus-within > .nav-dropdown-nested {
    display: block;
  }

  /* JS-controlled aria-expanded="true" also forces open (covers focus + click). */
  .nav-dropdown:not([hidden]) {
    display: block;
    animation: nav-dropdown-fade 150ms ease-out;
  }

  @keyframes nav-dropdown-fade {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

/* Focus ring for keyboard users on all triggers + menuitems */
.nav-chevron-toggle:focus-visible,
.nav-link.nav-parent-button:focus-visible,
.nav-menuitem:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Mobile / no-hover: inline accordion expansion under the hamburger */
@media (hover: none), (max-width: 768px) {
  .nav-item-wrap {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-item-wrap > .nav-link.nav-parent,
  .nav-item-wrap > .nav-link.nav-parent-button {
    width: auto;
    flex: 1 1 auto;
  }

  .nav-dropdown {
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    padding-left: 1.5rem;
    width: 100%;
  }

  .nav-dropdown-nested {
    padding-left: 1.5rem;
  }

  .nav-dropdown[hidden] {
    display: none;
  }

  .nav-dropdown:not([hidden]) {
    display: block;
  }

  .nav-menuitem {
    padding: 0.625rem 0.75rem;
  }
}