.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 5rem;
  border-bottom: var(--border-subtle);
  background: rgba(33, 31, 28, 0.96);
  color: var(--color-ivory-100);
}

.site-header__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  width: min(100% - (var(--container-padding) * 2), var(--container-max));
  height: 100%;
  margin-inline: auto;
}

.site-header__nav,
.site-header__actions,
.site-header__list,
.site-header__brand {
  min-width: 0;
}

.site-header__list,
.site-header__mobile-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__list > li,
.site-header__mobile-list > li,
.site-header__list > li + li,
.site-header__mobile-list > li + li {
  margin: 0;
  padding: 0;
}

.site-header__nav--secondary {
  justify-self: end;
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  border-bottom: 1px solid transparent;
  color: var(--color-ivory-300);
  font-size: var(--text-small);
  font-weight: 600;
  line-height: 1.25;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__link:hover,
.site-header__link[aria-current="page"] {
  border-color: var(--color-brass-500);
  color: var(--color-brass-300);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  justify-self: center;
  gap: 0.625rem;
  min-height: 3rem;
  color: var(--color-ivory-100);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__logo {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  object-fit: contain;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: var(--space-3);
}

.site-header__age {
  color: var(--color-muted-stone);
  font-size: var(--text-meta);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 3rem;
  min-width: 3rem;
  height: 3rem;
  min-height: 3rem;
  padding: 0;
  border: var(--border-subtle);
  border-radius: var(--radius-button);
  background: transparent;
  color: var(--color-ivory-100);
}

.site-header__toggle:hover {
  border-color: var(--color-brass-500);
  background: var(--surface-active);
}

.site-header__toggle-line {
  position: absolute;
  left: 0.8125rem;
  width: 1.375rem;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.site-header__toggle-line:nth-child(1) { top: 1.0625rem; }
.site-header__toggle-line:nth-child(2) { top: 1.4375rem; }
.site-header__toggle-line:nth-child(3) { top: 1.8125rem; }

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) { transform: translateY(0.375rem) rotate(45deg); }
.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(2) { opacity: 0; }
.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) { transform: translateY(-0.375rem) rotate(-45deg); }

.site-header__mobile-nav {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  border-bottom: var(--border-subtle);
  background: var(--surface-raised);
  box-shadow: var(--shadow-floating);
}

.site-header__mobile-inner {
  display: grid;
  gap: var(--space-5);
  width: min(100% - (var(--container-padding) * 2), var(--container-max));
  margin-inline: auto;
  padding-block: var(--space-5) var(--space-6);
}

.site-header__mobile-list {
  display: grid;
  gap: var(--space-2);
}

.site-header__mobile-link {
  display: flex;
  align-items: center;
  min-height: 3rem;
  padding-inline: var(--space-3);
  border-bottom: 1px solid rgba(212, 203, 192, 0.1);
  color: var(--color-ivory-100);
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.25;
  text-decoration: none;
}

.site-header__mobile-link:hover,
.site-header__mobile-link:focus-visible {
  border-bottom-color: var(--color-brass-500);
  background: var(--surface-active);
  color: var(--color-brass-300);
}

.site-header__mobile-note {
  margin: 0;
  color: var(--color-muted-stone);
  font-size: var(--text-small);
  line-height: var(--leading-small);
}

@media (max-width: 899px) {
  .site-header {
    height: 4rem;
  }

  .site-header__inner {
    grid-template-columns: 1fr auto 1fr;
  }

  .site-header__nav {
    display: none;
  }

  .site-header__actions {
    gap: var(--space-2);
  }

  .site-header__toggle {
    display: inline-flex;
  }
}

@media (max-width: 599px) {
  .site-header__logo {
    width: 1.75rem;
    height: 1.75rem;
  }

  .site-header__brand {
    gap: var(--space-2);
  }

  .site-header__brand-text {
    font-size: 1rem;
  }

  .site-header__age {
    font-size: 0.6875rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-line {
    transition: none;
  }
}