.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: radial-gradient(circle at top left, rgba(208, 168, 90, 0.1), transparent 55%),
              radial-gradient(circle at bottom right, rgba(11, 60, 51, 0.4), transparent 60%),
              rgba(5, 6, 7, 0.92);
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  gap: var(--space-8);
}

.site-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-text);
}

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 0, var(--color-accent-gold-soft), var(--color-accent-gold-dark));
  color: #050607;
  font-family: var(--font-serif);
  font-size: var(--font-size-md);
  font-weight: 600;
  box-shadow: var(--shadow-soft);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
}

.site-header__brand-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__brand-tagline {
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.site-header__nav {
  display: flex;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0;
  font-size: var(--font-size-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  transform-origin: center;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--color-accent-gold-soft), var(--color-primary-soft));
  transition: transform var(--transition-medium);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-text);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.site-header__nav-item--highlight .site-header__nav-link--cta {
  padding: 0.45rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(208, 168, 90, 0.55);
  background: radial-gradient(circle at top left, rgba(208, 168, 90, 0.32), transparent 60%),
              linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-soft));
  box-shadow: var(--shadow-soft);
  color: var(--color-text);
}

.site-header__nav-item--highlight .site-header__nav-link--cta::after {
  display: none;
}

.site-header__nav-item--highlight .site-header__nav-link--cta:hover,
.site-header__nav-item--highlight .site-header__nav-link--cta:focus-visible {
  border-color: var(--color-accent-gold-soft);
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-accent-gold-soft));
}

.site-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(5, 6, 7, 0.9);
  color: var(--color-text);
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-header__toggle-icon {
  position: relative;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-medium), opacity var(--transition-medium), top var(--transition-medium), bottom var(--transition-medium);
}

.site-header__toggle-icon::before {
  top: -5px;
}

.site-header__toggle-icon::after {
  bottom: -5px;
}

.site-header__toggle.is-open .site-header__toggle-icon {
  background: transparent;
}

.site-header__toggle.is-open .site-header__toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header__toggle.is-open .site-header__toggle-icon::after {
  bottom: 0;
  transform: rotate(-45deg);
}

.site-header__toggle-label {
  font-size: var(--font-size-xs);
}

@media (max-width: 960px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    max-height: calc(100vh - 64px);
    padding: var(--space-8) var(--page-gutter-x) var(--space-16);
    background: radial-gradient(circle at top, rgba(208, 168, 90, 0.14), transparent 65%),
                rgba(5, 6, 7, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), transform var(--transition-medium), visibility var(--transition-medium);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .site-header__nav-item--highlight .site-header__nav-link--cta {
    width: 100%;
    justify-content: center;
    margin-top: var(--space-4);
  }

  .site-header__nav-link {
    font-size: var(--font-size-md);
  }

  .site-header__nav--open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

@media (max-width: 520px) {
  .site-header__brand-tagline {
    display: none;
  }
}