/* Main menu submenus (header.php, assets/navigation.js) and the footer's page list.
   Desktop (861px and up): each parent is a link plus a chevron button; the submenu is a floating panel.
   Phones (860px and below, matching style.css): submenus are indented lists inside the menu, opened like an accordion.
   Without JavaScript: desktop panels open on hover and keyboard focus; on phones the lists are always shown. */

.sub-toggle {
  position: relative; display: inline-flex; align-items: center; justify-content: center; flex: none;
  margin: 0; padding: 0; border: 0; background: transparent; color: var(--muted); font: inherit; cursor: pointer;
}
.sub-toggle__icon { display: block; width: 12px; height: 12px; }
.sub-toggle[aria-expanded="true"] .sub-toggle__icon { transform: rotate(180deg); }
.sub-toggle:hover, .sub-toggle[aria-expanded="true"] { color: var(--text); }
.sub-toggle:focus-visible { outline: 2px solid var(--amber); outline-offset: -2px; border-radius: 6px; }

.site-nav .sub-menu { list-style: none; margin: 0; padding: 0; }
.site-nav .sub-menu li { margin: 0; }
.site-nav .sub-menu a { display: flex; flex-direction: column; justify-content: center; gap: 1px; color: var(--text); }
.site-nav .sub-menu a:hover { color: var(--text); background: var(--card-2); }
.sub-menu__label { font-weight: 500; }
.sub-menu__desc { color: var(--muted); font-size: .84rem; line-height: 1.35; font-weight: 400; }
/* "All services" / "All work": the parent page again, as a small overview link. */
.sub-menu__all .sub-menu__label { font-family: var(--font-mono); font-size: .74rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--amber); }
/* A page in this section is showing. */
.site-nav .has-sub.is-current-parent > a { color: var(--text); background: var(--card); }

@media (min-width: 861px) {
  /* The link and its chevron button read as one item. */
  .site-nav .has-sub { position: relative; display: flex; align-items: stretch; border-radius: 6px; }
  .site-nav .has-sub:hover, .site-nav .has-sub.is-open, .site-nav .has-sub.is-current, .site-nav .has-sub.is-current-parent { background: var(--card); }
  .site-nav .has-sub:hover > a, .site-nav .has-sub.is-open > a { color: var(--text); }
  .site-nav .has-sub > a { padding-right: 5px; }
  .site-nav .has-sub > .sub-toggle { width: 28px; padding-right: 4px; border-radius: 0 6px 6px 0; }

  .site-nav .sub-menu {
    display: none; position: absolute; z-index: 2; top: calc(100% + 8px); left: 0;
    width: max-content; min-width: 15rem; max-width: min(22rem, calc(100vw - 2 * var(--gutter)));
    padding: 6px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: 0 18px 40px rgba(0, 0, 0, .45), 0 2px 8px rgba(0, 0, 0, .3);
  }
  /* Covers the gap above the panel, so the pointer can move from the link into it. */
  .site-nav .sub-menu::before { content: ""; position: absolute; left: -1px; right: -1px; bottom: 100%; height: 10px; }
  html:not(.js) .site-nav .has-sub:hover > .sub-menu,
  html:not(.js) .site-nav .has-sub:focus-within > .sub-menu,
  .site-nav .has-sub.is-open > .sub-menu { display: grid; gap: 2px; }
  .site-nav .sub-menu a { padding: 9px 12px; border-radius: 7px; }
  .site-nav .sub-menu a:focus-visible { outline-offset: -2px; border-radius: 7px; background: var(--card-2); }
  .site-nav .sub-menu a[aria-current="page"] { background: var(--card-2); box-shadow: inset 3px 0 0 var(--amber); }
  .sub-menu__all { border-bottom: 1px solid var(--line); padding-bottom: 4px; }
}

@media (min-width: 861px) and (prefers-reduced-motion: no-preference) {
  .sub-toggle__icon { transition: transform .15s ease; }
  .site-nav .sub-menu { transition: opacity .14s ease, translate .14s ease; }
  @starting-style {
    html:not(.js) .site-nav .has-sub:hover > .sub-menu,
    html:not(.js) .site-nav .has-sub:focus-within > .sub-menu,
    .site-nav .has-sub.is-open > .sub-menu { opacity: 0; translate: 0 -4px; }
  }
}

@media (max-width: 860px) {
  .site-nav .has-sub { display: flex; flex-wrap: wrap; align-items: stretch; column-gap: 6px; }
  .site-nav .has-sub > a { flex: 1 1 0; min-width: 0; }
  /* 44px, centred on the link's row, so two buttons in a row of parents don't touch. */
  .site-nav .has-sub > .sub-toggle { align-self: center; width: 48px; height: 44px; border: 1px solid var(--line); border-radius: 7px; color: var(--text); }
  .site-nav .has-sub > .sub-toggle[aria-expanded="true"] { background: var(--card); border-color: var(--muted); }
  .site-nav .has-sub.is-open > a { color: var(--text); }
  .site-nav .sub-menu { flex: 0 0 calc(100% - 12px); margin: 2px 0 6px 12px; padding-left: 10px; border-left: 1px solid var(--line); }
  .site-nav .sub-menu a { min-height: 44px; }
  .sub-menu__desc { display: none; }
  .js .site-nav .sub-menu { display: none; }
  .js .site-nav .has-sub.is-open > .sub-menu { display: flex; }
  html:not(.js) .sub-toggle { display: none; } /* the lists are already showing */
  .site-nav .button { min-height: 44px; } /* a full-size tap target in the phone menu */
}

/* Footer "Site" list: each section's pages, indented under it. */
.site-footer .footer-sub { margin: 4px 0 8px; padding-left: 12px; border-left: 1px solid var(--line); }
.site-footer .footer-sub a { color: var(--muted); }
.site-footer .footer-sub a:hover { color: var(--amber); }