/* Header menu: 44px pill button, opaque full-height sheet, scrim, active link, action row. */
.menu-actions, .menu-scrim { display: none; }

html.menu-open, html.menu-open body { overflow: hidden !important; overscroll-behavior: none; }

/* Colours use the site tokens (--canvas/--ink/--line/--brand) so both the legacy invert-dark and theme.css dark work. */
/* Menu mode applies wherever the old CSS collapses the nav (<=1080px). */
@media (max-width: 1080px) {
  .site-header { backdrop-filter: none !important; -webkit-backdrop-filter: none !important; background: var(--canvas,#fbfbf8) !important; }

  .site-header .menu-button {
    position: relative; display: block !important; width: 44px; height: 44px; padding: 0 !important;
    border: 1px solid var(--ink,#1e2025) !important; border-radius: 999px !important;
    background: var(--canvas,#fbfbf8) !important; color: var(--ink,#1e2025); justify-self: end; cursor: pointer;
    -webkit-tap-highlight-color: transparent; touch-action: manipulation;
    transition: background-color .2s, border-color .2s, box-shadow .2s;
  }
  .site-header .menu-button > span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .site-header .menu-button i,
  .site-header .menu-button i::after {
    position: absolute; left: 50%; top: 50%; display: block; width: 18px; height: 2px; margin: -1px 0 0 -9px;
    border-radius: 2px; background: currentColor; content: ""; transition: transform .25s ease;
  }
  .site-header .menu-button i { transform: translateY(-3.5px); }
  .site-header .menu-button i::after { margin: 0; left: 0; top: 0; transform: translateY(7px); }
  .site-header .menu-button[aria-expanded="true"] { border-color: var(--brand,#405dea) !important; background: color-mix(in srgb,var(--brand,#405dea) 14%,var(--canvas,#fbfbf8)) !important; color: var(--brand,#405dea); }
  .site-header .menu-button[aria-expanded="true"] i { transform: rotate(45deg); }
  .site-header .menu-button[aria-expanded="true"] i::after { transform: rotate(-90deg); }
  .site-header .menu-button:focus-visible, .site-header .site-search-button:focus-visible { outline: 3px solid var(--focus,var(--brand,#405dea)); outline-offset: 2px; }

  .menu-scrim {
    position: fixed; inset: 0; z-index: 15; display: block; background: color-mix(in srgb, #000 55%, transparent);
    -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
    opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility 0s linear .25s;
  }
  .menu-scrim.is-visible { opacity: 1; visibility: visible; transition: opacity .25s ease; }

  .site-header .site-nav {
    position: fixed !important; top: 64px; right: 0; bottom: 0; left: 0; z-index: 19;
    display: flex !important; flex-direction: column; gap: 0 !important;
    max-height: none !important; overflow-y: auto; overscroll-behavior: contain;
    padding: .5rem 0 max(1rem, env(safe-area-inset-bottom));
    border: 0 !important; background: var(--canvas,#fbfbf8);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .22s ease, transform .22s ease, visibility 0s linear .22s;
  }
  .site-header .site-nav.is-open { opacity: 1; visibility: visible; transform: none; transition: opacity .22s ease, transform .22s ease; }

  .site-header .site-nav > a {
    position: relative; display: flex; align-items: center; justify-content: space-between;
    min-height: 56px; padding: 0 1.25rem !important; border: 0 !important; border-bottom: 1px solid var(--line) !important;
    border-radius: 0 !important; background: transparent; box-shadow: none; transform: none !important;
    color: var(--ink,#1e2025); font-size: 1.05rem; font-weight: 600; letter-spacing: -.01em;
  }
  .site-header .site-nav > a::after {
    position: static; width: 8px; height: 8px; border: solid currentColor; border-width: 2px 2px 0 0; border-radius: 0; background: none;
    content: ""; opacity: .35; transform: rotate(45deg) !important;
  }
  .site-header .site-nav > a:hover,
  .site-header .site-nav > a:focus-visible { background: color-mix(in srgb,var(--brand,#405dea) 14%,var(--canvas,#fbfbf8)); color: var(--brand,#405dea); box-shadow: none; }
  .site-header .site-nav > a:focus-visible { outline: 3px solid var(--focus,var(--brand,#405dea)); outline-offset: -3px; }
  .site-header .site-nav > a[aria-current="true"] { background: color-mix(in srgb,var(--brand,#405dea) 14%,var(--canvas,#fbfbf8)); color: var(--brand,#405dea); box-shadow: inset 4px 0 0 var(--brand,#405dea); }
  .site-header .site-nav > a[aria-current="true"]::after { opacity: 1; }

  .site-header .menu-actions { display: flex; gap: .75rem; margin-top: auto; padding: 1.25rem 1.25rem 0; }
  .site-header .menu-actions a {
    flex: 1; display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 1rem !important;
    border: 1px solid var(--ink, #1e2025) !important; border-radius: 999px !important; font-size: .95rem; font-weight: 600;
    color: var(--ink, #1e2025); background: transparent;
  }
  .site-header .menu-actions a::after { display: none; }
  .site-header .menu-actions a.menu-primary { background: var(--brand,#405dea); border-color: var(--brand,#405dea) !important; color: var(--canvas,#fbfbf8) !important; }
}

/* Tablet: sheet is a right-aligned panel, not edge to edge. */
@media (min-width: 621px) and (max-width: 1080px) {
  .site-header .site-nav { left: auto; width: min(420px, 100%); border-left: 1px solid var(--line) !important; }
}

/* Phone: search pill becomes a 44px icon button. */
@media (max-width: 620px) {
  .site-header .site-search-button {
    width: 44px; height: 44px; min-width: 44px !important; padding: 0 !important; justify-content: center;
    border-radius: 999px; font-size: 0 !important; gap: 0;
  }
  .site-header .site-search-button span { font-size: 1.35rem; line-height: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .site-header .site-nav, .menu-scrim, .site-header .menu-button, .site-header .menu-button i, .site-header .menu-button i::after { transition: none !important; }
}