.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding-block: var(--space-sm);
  transition: padding var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out),
    backdrop-filter var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  padding-block: var(--space-2xs);
  background: rgba(245, 241, 234, 0.86);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border-on-light);
}

.site-header__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--black);
  letter-spacing: -0.01em;
}

.site-header__logo-mark {
  width: 30px;
  height: 30px;
  color: var(--black);
}

.site-header__logo-text em {
  font-style: italic;
  color: var(--accent);
  margin-left: 0.3em;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.main-nav__list a {
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-header__phone {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-on-light-muted);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  z-index: calc(var(--z-mobile-nav) + 1);
  position: relative;
}

.nav-toggle__bar {
  width: 22px;
  height: 1.5px;
  background: var(--black);
  margin-inline: auto;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* When the full-screen dark overlay is open, the header itself stays
   transparent — flip its logo/toggle to light so they stay visible against
   the dark overlay bleeding through underneath. */
body.nav-open .site-header__logo {
  color: var(--cream);
}
body.nav-open .site-header__logo-mark {
  color: var(--cream);
}
body.nav-open .nav-toggle__bar {
  background: var(--cream);
}

/* ---------- Mobile full-screen nav ---------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-nav);
  background: var(--black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-xl) var(--container-pad);
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-out), visibility var(--dur-med);
}

.mobile-nav.is-open {
  visibility: visible;
  opacity: 1;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav__list li {
  opacity: 0;
  transform: translateY(24px);
}

.mobile-nav.is-open .mobile-nav__list li {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out);
  transition-delay: calc(var(--i, 0) * 60ms);
}

.mobile-nav__list a {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 9vw, 3.2rem);
  color: var(--cream);
  font-weight: 600;
}
.mobile-nav__list a:hover {
  color: var(--accent);
}

.mobile-nav__footer {
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  color: var(--text-on-dark-muted);
}

.mobile-nav__footer a {
  font-size: var(--fs-lg);
}

.mobile-nav__social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}
.mobile-nav__social .icon {
  width: 20px;
  height: 20px;
  color: var(--cream);
}

@media (max-width: 1024px) {
  .main-nav,
  .site-header__phone {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 640px) {
  .site-header__row {
    gap: var(--space-xs);
  }
  .site-header__logo {
    font-size: 1.05rem;
  }
  .site-header__logo-mark {
    width: 24px;
    height: 24px;
  }
  .site-header__actions {
    gap: var(--space-xs);
  }
  .site-header__actions .btn--primary {
    display: none;
  }
}