.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(5, 6, 8, 0.96), rgba(5, 6, 8, 0.88));
  border-bottom: 1px solid rgba(216, 179, 106, 0.18);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-8);
  gap: var(--space-10);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  color: var(--color-text);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 40% 60% 55% 45%;
  background: radial-gradient(circle at 30% 20%, var(--color-accent-gold), var(--color-primary));
  box-shadow: var(--shadow-soft);
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: inherit;
  border: 1px solid rgba(247, 243, 234, 0.7);
  opacity: 0.9;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.primary-nav {
  display: flex;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-10);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-block: 0.35rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.15rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-gold), var(--color-primary-alt));
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

.nav-cta-item {
  margin-left: var(--space-4);
}

.nav-cta {
  font-size: var(--font-size-xs);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-4);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(216, 179, 106, 0.55);
  color: var(--color-text);
  background: rgba(5, 6, 8, 0.9);
  cursor: pointer;
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-line {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-accent-gold);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
}

.nav-toggle-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header.is-open .nav-toggle-line:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-header.is-open .nav-toggle-line:last-child {
  transform: translateY(-3px) rotate(-45deg);
  width: 18px;
}

@media (max-width: 900px) {
  .primary-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: rgba(5, 6, 8, 0.98);
    border-bottom: 1px solid rgba(216, 179, 106, 0.2);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .site-header.is-open .primary-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-10) var(--space-12) var(--space-12);
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: inline-block;
    padding-block: 0.4rem;
  }

  .nav-cta-item {
    margin-left: 0;
    margin-top: var(--space-6);
  }

  .nav-cta {
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

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

@media (prefers-reduced-motion: reduce) {
  .primary-nav,
  .nav-toggle-line {
    transition: none;
  }
}