.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-mark__symbol {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(47, 79, 58, 0.25);
  background: radial-gradient(circle at 30% 20%, #fdf8f0 0, #f5ecdd 40%, #e1d4c4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 14px rgba(28, 20, 10, 0.16);
}

.brand-mark__crest {
  width: 14px;
  height: 14px;
  border-radius: 40% 60% 45% 55%;
  background: linear-gradient(135deg, #2f4f3a, #3e6750);
  box-shadow: 0 0 0 2px rgba(247, 243, 235, 0.9);
}

.nav-primary {
  display: flex;
  align-items: center;
}

.nav-primary__list {
  display: flex;
  gap: var(--space-12);
}

.nav-primary__item a {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-pill);
  position: relative;
}

.nav-primary__item a:hover,
.nav-primary__item a:focus-visible {
  color: var(--color-text);
  background-color: rgba(246, 239, 228, 0.7);
}

.nav-primary__item a[aria-current="page"] {
  color: var(--color-text);
  background-color: rgba(246, 239, 228, 0.9);
}

.nav-toggle {
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.55rem;
  border: 1px solid rgba(185, 154, 121, 0.5);
  background-color: rgba(255, 255, 255, 0.85);
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.nav-toggle__line {
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background-color: #f6efe4;
  border-color: rgba(185, 154, 121, 0.9);
  box-shadow: var(--shadow-soft);
}

.nav-toggle--open {
  background-color: #f6efe4;
}

.nav-toggle--open .nav-toggle__line:nth-child(1),
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle--open .nav-toggle__line:nth-child(2),
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle--open .nav-toggle__line:nth-child(3),
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 768px) {
  .site-header {
    backdrop-filter: none;
  }

  .site-header__inner {
    position: relative;
  }

  /* Override base layout: anchor drawer to sticky header, not viewport-fixed overlay */
  .nav-primary {
    position: static;
    display: block;
    width: 0;
    height: 0;
    overflow: visible;
    flex: 0 0 auto;
  }

  .nav-primary__list {
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    width: 100%;
    top: 100%;
    z-index: 50;
    flex-direction: column;
    gap: 0;
    padding: var(--space-12) var(--container-gutter) var(--space-16);
    background: radial-gradient(circle at top left, #fbf6ed 0, var(--color-bg) 40%, #f6efe4 100%);
    border-bottom: 1px solid rgba(224, 213, 197, 0.9);
    box-shadow: 0 14px 35px rgba(28, 20, 10, 0.12);
    box-sizing: border-box;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
    transition: max-height var(--transition-base), opacity var(--transition-base);
  }

  .nav-primary--open .nav-primary__list {
    max-height: 480px;
    opacity: 1;
    overflow: visible;
    pointer-events: auto;
  }

  .nav-primary__item a {
    display: block;
    padding: 0.75rem 0.2rem;
    width: 100%;
  }

  .nav-toggle {
    position: relative;
    z-index: 51;
    min-width: 44px;
    min-height: 44px;
  }
}

@media (min-width: 769px) {
  .nav-primary {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    box-shadow: none;
    border: none;
  }

  .nav-primary__list {
    position: static;
    max-height: none;
    opacity: 1;
    pointer-events: auto;
    overflow: visible;
    padding: 0;
    background: none;
    border: none;
    box-shadow: none;
  }
}

body.nav-open {
  overflow: hidden;
}