/* Shared site chrome: announcement bar, sticky header, Solutions dropdown, mobile menu and footer. */
.topbar { padding: 9px 16px; background: var(--ink); color: #cfd4dc; font-size: 0.85rem; text-align: center; }
.topbar a { color: #fff; font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }

.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: rgba(255, 255, 255, 0.96); border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(180%) blur(12px); -webkit-backdrop-filter: saturate(180%) blur(12px);
  transition: box-shadow 0.2s;
}
.site-header.is-scrolled { box-shadow: 0 2px 16px rgba(16, 24, 40, 0.06); }
.site-header__inner { height: 100%; display: flex; align-items: center; gap: 36px; }

.site-menu { flex: 1; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-width: 0; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav > a, .nav-dropdown__button {
  padding: 0; border: 0; background: none; cursor: pointer;
  color: var(--ink-2); font-size: 0.9375rem; font-weight: 500; line-height: 1.2;
}
.site-nav > a:hover, .nav-dropdown__button:hover, .nav-dropdown__button[aria-expanded='true'] { color: var(--accent); }
.site-nav [aria-current='page'] { color: var(--ink); box-shadow: 0 6px 0 -4px var(--ink); }
.nav-dropdown { position: relative; }
.nav-dropdown__button::after {
  content: ''; display: inline-block; width: 6px; height: 6px; margin: 0 0 2px 7px;
  border: solid currentColor; border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); transition: transform 0.15s;
}
.nav-dropdown__button[aria-expanded='true']::after { transform: rotate(225deg) translate(-2px, -2px); }
.nav-dropdown__panel {
  position: absolute; top: calc(100% + 18px); left: -16px; width: 320px; padding: 8px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(-4px); transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
}
.nav-dropdown__button[aria-expanded='true'] + .nav-dropdown__panel { opacity: 1; visibility: visible; transform: none; }
.nav-dropdown__panel a { display: block; padding: 10px 12px; border-radius: var(--radius-sm); }
.nav-dropdown__panel a:hover, .nav-dropdown__panel a:focus-visible { background: var(--bg-soft); }
.nav-dropdown__panel b { display: block; color: var(--ink); font-size: 0.9rem; font-weight: 600; }
.nav-dropdown__panel span { color: var(--muted); font-size: 0.8125rem; }

.site-header__actions { display: flex; align-items: center; gap: 20px; }
.header-link { color: var(--ink-2); font-size: 0.9375rem; font-weight: 500; }
.header-link:hover { color: var(--accent); }
.nav-toggle {
  display: none; width: 40px; height: 40px; margin-left: auto; padding: 0; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--line-strong); background: #fff;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { width: 18px; height: 2px; border-radius: 2px; background: var(--ink); transition: transform 0.2s; }
.nav-toggle[aria-expanded='true'] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded='true'] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* Footer */
.site-footer { padding: 64px 0 32px; background: var(--bg-soft); border-top: 1px solid var(--line); font-size: 0.925rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.footer-grid p { max-width: 300px; margin: 14px 0 0; color: var(--muted); }
.footer-col h4 { margin: 0 0 14px; color: var(--ink); font-size: 0.875rem; font-weight: 600; }
.footer-col ul { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.footer-col a { color: var(--muted); }
.footer-col a:hover { color: var(--ink); }
.footer-legal { margin: 24px 0 0; color: var(--muted); font-size: 0.825rem; }

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .site-menu {
    position: fixed; top: var(--header-h); left: 0; right: 0; max-height: calc(100vh - var(--header-h)); overflow-y: auto;
    flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 0; padding: 4px 24px 20px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 24px rgba(16, 24, 40, 0.08);
    opacity: 0; visibility: hidden; transform: translateY(-6px); transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  }
  .site-menu.is-open { opacity: 1; visibility: visible; transform: none; }
  .site-nav { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav > a, .nav-dropdown__button { display: block; width: 100%; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 1rem; text-align: left; }
  .site-nav [aria-current='page'] { box-shadow: none; }
  .nav-dropdown__button { display: flex; align-items: center; justify-content: space-between; }
  .nav-dropdown__panel { position: static; width: auto; padding: 4px 0 4px 12px; border: 0; box-shadow: none; opacity: 1; visibility: visible; transform: none; display: none; }
  .nav-dropdown__button[aria-expanded='true'] + .nav-dropdown__panel { display: block; }
  .site-header__actions { flex-direction: column; align-items: stretch; gap: 10px; padding-top: 20px; }
  .site-header__actions .header-link { padding: 10px 0; text-align: center; }
  .site-header__actions .btn { padding: 12px 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
  .topbar { font-size: 0.8rem; }
  .site-menu { padding-inline: 16px; }
}