/* Shared navigation and footer. Body content keeps each page's own styles. */
:root {
  --az-shell: 78rem;
  --az-inset: max(1.5rem, calc((100% - var(--az-shell)) / 2));
  --az-line: color-mix(in srgb, var(--color-ink) 14%, transparent);
  --az-glass: color-mix(in srgb, var(--color-paper) 90%, transparent);
  --az-pill: 100px;
}
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 8rem; }
.az-header, .az-header *, .az-footer, .az-footer * { box-sizing: border-box; }
.az-header a, .az-footer a { text-decoration: none; }
.az-header {
  position: sticky; top: 22px; z-index: 50;
  display: flex; align-items: center; gap: 34px;
  width: calc(100% - 80px); max-width: 1360px;
  min-height: 80px; margin: 22px auto 0; padding: 12px 16px 12px 32px;
  border: 1px solid var(--az-line); border-radius: var(--az-pill);
  background: var(--az-glass); -webkit-backdrop-filter: blur(22px); backdrop-filter: blur(22px);
  color: var(--color-ink); font-family: var(--font-body);
}
.az-header .az-brand, .az-footer .az-brand {
  display: inline-flex; align-items: center; gap: 12px;
  flex-shrink: 0; font: 700 34px/1 var(--font-display);
  letter-spacing: -.06em; color: var(--color-ink); white-space: nowrap;
}
.az-brand-mark { display: block; flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%; }
.az-nav { display: flex; gap: clamp(20px, 2.4vw, 40px); margin-left: auto; }
.az-nav a { display: flex; flex-direction: column; gap: 3px; color: var(--color-ink-soft); font-size: 11px; line-height: 1.5; }
.az-nav a > span { font: 700 13px/1.5 var(--font-display); color: var(--color-ink); letter-spacing: .015em; }
.az-nav a:hover, .az-nav a:hover > span { color: var(--color-accent); }
.az-header .az-nav-cta {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 28px;
  min-height: 52px; padding: 0 24px; border-radius: var(--az-pill);
  background: var(--color-accent); color: var(--color-paper); font-size: 13px; font-weight: 700; white-space: nowrap;
  transition: background 160ms, transform 160ms;
}
.az-header .az-nav-cta:hover { background: var(--color-accent-deep); transform: translateY(-2px); }
.az-nav-cta span { font-size: 20px; }
.az-menu { display: none; }
.az-home .az-skip, .az-skip { position: fixed; z-index: 100; top: 8px; left: 24px; padding: 12px 20px; background: var(--color-accent); color: var(--color-paper); border-radius: 8px; transform: translateY(-180%); }
.az-skip:focus { transform: none; }
.az-header :focus-visible, .az-footer :focus-visible, .az-home :focus-visible { outline: 2px solid var(--color-focus); outline-offset: 6px; }
.az-footer { padding: 64px var(--az-inset) 28px; border-top: 1px solid var(--az-line); color: var(--color-muted); background: var(--color-paper); font-family: var(--font-body); }
.az-footer p { margin: 0; }
.az-footer-top { display: flex; align-items: center; gap: 34px; padding-bottom: 44px; }
.az-footer-top .az-brand { font-size: 44px; }
.az-footer-top p { color: var(--color-ink-soft); font-size: 14px; letter-spacing: .04em; }
.az-back { display: flex; align-items: center; gap: 18px; margin-left: auto; color: var(--color-ink); font: 700 12px var(--font-display); }
.az-back span { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--az-line); border-radius: 50%; font-size: 18px; transition: background 160ms; }
.az-back:hover span { background: var(--color-paper-2); }
.az-footer-bottom { display: flex; align-items: center; gap: 26px; border-top: 1px solid var(--az-line); padding-top: 24px; font-size: 11px; line-height: 1.8; }
.az-footer-bottom nav { margin-left: auto; display: flex; gap: 24px; }
.az-footer-bottom a { color: var(--color-ink-soft); }
.az-footer-bottom a:hover { color: var(--color-accent); }
.az-subpage main > section:first-child { padding-top: 100px; }
@media (min-width: 1680px) { :root { --az-shell: 84rem; } }
/* Keep the full navigation from squeezing the official logo on tablets. */
@media (max-width: 960px) {
  .az-footer-bottom { flex-wrap: wrap; }
  .az-footer-bottom nav { margin-left: 0; width: 100%; }
  [id] { scroll-margin-top: 7rem; }
  .az-header { top: 12px; margin-top: 12px; width: calc(100% - 32px); min-height: 64px; padding: 10px 20px 10px 12px; gap: 12px; background: var(--color-paper); }
  .az-header .az-brand { font-size: 29px; }
  .az-header .az-brand-mark { width: 40px; height: 40px; }
  .az-nav, .az-header > .az-nav-cta { display: none; }
  .az-menu { display: block; margin-left: auto; }
  .az-menu summary { display: flex; align-items: center; gap: 14px; min-height: 42px; cursor: pointer; list-style: none; font: 700 12px var(--font-display); }
  .az-menu summary::-webkit-details-marker { display: none; }
  .az-menu-icon { display: block; position: relative; width: 22px; height: 12px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; transition: transform 160ms; }
  .az-menu[open] .az-menu-icon { transform: rotate(-45deg); height: 1px; border-bottom: 0; }
  .az-menu[open] .az-menu-icon::after { content: ''; position: absolute; inset: -1px 0 0; border-top: 1px solid currentColor; transform: rotate(90deg); }
  .az-menu nav { position: absolute; top: calc(100% + 12px); left: 0; right: 0; display: grid; padding: 16px 24px; border: 1px solid var(--az-line); border-radius: 24px; background: var(--color-paper-2); box-shadow: 0 20px 45px #0005; max-height: calc(100dvh - 112px - env(safe-area-inset-bottom, 0px)); overflow-y: auto; overscroll-behavior: contain; }
  .az-menu nav a { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--az-line); color: var(--color-ink); font-size: 15px; }
  .az-menu nav a:last-child { color: var(--color-accent); border-bottom: 0; }
  .az-menu nav a span { color: var(--color-muted); font: 700 12px var(--font-display); }
}
@media (max-width: 760px) {
  :root { --az-inset: 20px; }
  .az-footer { padding-top: 44px; }
  .az-footer-top { display: grid; gap: 20px; padding-bottom: 32px; }
  .az-footer-top .az-brand { font-size: 36px; }
  .az-footer-top p { font-size: 13px; }
  .az-back { width: 100%; margin-left: 0; justify-content: space-between; }
  .az-footer-bottom { gap: 8px 24px; }
  .az-footer-bottom nav { flex-wrap: wrap; gap: 12px 22px; margin-top: 14px; }
  .az-footer-bottom nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; }
  .az-subpage main > section:first-child { padding-top: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .az-header *, .az-footer * { transition: none !important; }
}