/* Navigation — design.md §14.2. 88px desktop / 64px mobile, logo centered,
   links left, icons right; transparent-over-hero → glass on scroll (§7). */

#site-header-mount {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky-nav);
}

.site-header {
  position: relative;
  z-index: var(--z-sticky-nav);
  transition: background-color var(--duration-base) var(--easing-standard),
              box-shadow var(--duration-base) var(--easing-standard);
  background: var(--surface-background);
  border-bottom: var(--border-hairline);
}

/* Transparent over hero (homepage top) */
.site-header--transparent {
  background: transparent;
  border-bottom-color: transparent;
  color: var(--color-neutral-50);
}

/* Glass on scroll (§7 shadow.glass) */
.site-header--glass {
  background: var(--glass-background);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm); /* subtle lift on scroll (Cartier/Apple register) */
}

.site-nav {
  height: 64px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .site-nav { height: 88px; }
}

.site-nav__links {
  display: none;
  gap: var(--space-4);
  list-style: none;
  white-space: nowrap;
}

@media (min-width: 1440px) {
  .site-nav__links { gap: var(--space-6); }
}

@media (min-width: 1024px) {
  .site-nav__links { display: flex; }
}

.site-nav__link {
  font-family: var(--font-label);
  font-size: var(--type-nav-size);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
  padding-block: var(--space-2);
}

.site-nav__logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 450;
  letter-spacing: 0.02em;
  text-align: center;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.site-nav__logo-img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  filter: drop-shadow(0 1px 3px rgba(27, 24, 21, 0.25));
}

@media (max-width: 379px) {
  .site-nav__logo-text { display: none; } /* medallion alone on tiny screens */
}

.site-nav__logo-mark { color: var(--accent-gold); }

.site-nav__actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-2);
}

.site-nav__icon-btn {
  width: 44px;   /* §18 touch target */
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  position: relative;
  color: inherit;
}

.site-nav__icon-btn:hover { color: var(--accent-gold); }

.site-nav__icon-btn svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.5; /* §8 thin-stroke */
}

/* Bag count badge — gold circle, white number (§14.2) */
.site-nav__bag-count {
  position: absolute;
  top: 4px;
  right: 2px;
  min-width: 16px;
  height: 16px;
  padding-inline: 4px;
  border-radius: var(--radius-full);
  background: var(--accent-gold);
  color: var(--color-neutral-50);
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  display: grid;
  place-items: center;
  line-height: 1;
}

.site-nav__bag-count[hidden] { display: none; }

.site-nav__hamburger { display: grid; }

@media (min-width: 1024px) {
  .site-nav__hamburger { display: none; }
}

/* Mobile full-screen overlay menu — links stagger-fade (§14.2) */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  background: var(--surface-background);
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  padding-bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--easing-standard);
}

.mobile-menu--open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__links {
  list-style: none;
  margin-top: var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.mobile-menu__links li {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 300ms var(--easing-entrance), transform 300ms var(--easing-entrance);
}

.mobile-menu--open .mobile-menu__links li {
  opacity: 1;
  transform: none;
}

/* 40ms stagger per link (§14.2) */
.mobile-menu--open .mobile-menu__links li:nth-child(1) { transition-delay: 40ms; }
.mobile-menu--open .mobile-menu__links li:nth-child(2) { transition-delay: 80ms; }
.mobile-menu--open .mobile-menu__links li:nth-child(3) { transition-delay: 120ms; }
.mobile-menu--open .mobile-menu__links li:nth-child(4) { transition-delay: 160ms; }
.mobile-menu--open .mobile-menu__links li:nth-child(5) { transition-delay: 200ms; }
.mobile-menu--open .mobile-menu__links li:nth-child(6) { transition-delay: 240ms; }
.mobile-menu--open .mobile-menu__links li:nth-child(7) { transition-delay: 280ms; }

.mobile-menu__link {
  font-family: var(--font-heading);
  font-size: var(--type-h3-size);
  font-weight: 600;
}

.mobile-menu__close {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
}