.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(247,243,236,0.98), rgba(247,243,236,0.92));
  border-bottom: 1px solid rgba(226,220,213,0.95);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  min-width: 0;
  max-width: 100%;
}

.brand-lockup {
  min-width: 0;
  flex: 1 1 auto;
  max-width: calc(100% - 52px);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  max-width: 100%;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  letter-spacing: 0.16em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  max-width: 100%;
}

.brand-text-main {
  font-family: var(--font-serif);
  font-size: clamp(0.78rem, 3.4vw, 1.05rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text-sub {
  display: block;
  font-size: clamp(0.58rem, 2.4vw, 0.7rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-link {
  position: relative;
  padding-bottom: 2px;
  color: var(--color-gray-700);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  width: 100%;
}

.nav-link[aria-current="page"] {
  color: var(--color-gray-900);
}

.nav-highlight .nav-link {
  color: var(--color-primary);
}

.nav-highlight .nav-link::after {
  background-color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  flex-direction: column;
  background-color: rgba(255,255,255,0.9);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  padding: 0 var(--space-3);
  gap: 5px;
  width: 44px;
  height: 44px;
}

.nav-toggle .nav-toggle__bar,
.nav-toggle span {
  display: block;
  width: 16px;
  height: 1px;
  background-color: var(--color-gray-900);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.is-active .nav-toggle__bar:nth-child(1),
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle.is-active .nav-toggle__bar:nth-child(3),
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 900px) {
  .site-header-inner {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .nav-toggle {
    display: inline-flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    padding: var(--space-4) var(--space-5) var(--space-6);
    background: radial-gradient(circle at top, #fbf8f2 0, #f0e7dc 55%, #e2dcd5 100%);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
    z-index: 60;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

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

@media (max-width: 480px) {
  .brand-link {
    gap: var(--space-2);
  }

  .brand-mark {
    width: 32px;
    height: 32px;
  }

  .brand-text-main {
    letter-spacing: 0.08em;
  }

  .brand-text-sub {
    letter-spacing: 0.04em;
  }
}

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