/* ==========================================================================
   Header / Navigation
   Transparent overlay on load → dark, blurred, sticky on scroll.
   Shared component: reused on every future page.
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding-block: 22px;
  transition: padding var(--dur-med) var(--ease-editorial),
              background var(--dur-med) var(--ease-editorial),
              box-shadow var(--dur-med) var(--ease-editorial),
              backdrop-filter var(--dur-med) var(--ease-editorial);
}

.site-header.is-scrolled {
  padding-block: 14px;
  background: rgba(23, 20, 15, 0.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 1px 0 rgba(243, 239, 228, 0.08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  background: var(--color-ivory);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  box-shadow: 0 8px 20px -8px rgba(0, 0, 0, 0.35);
  transition: padding var(--dur-med) var(--ease-editorial);
}
.site-header__logo img {
  height: 34px;
  width: auto;
  transition: height var(--dur-med) var(--ease-editorial);
}
.site-header.is-scrolled .site-header__logo {
  padding: 6px 12px;
}
.site-header.is-scrolled .site-header__logo img { height: 28px; }

/* Center nav */
.site-nav {
  display: none;
}
@media (min-width: 900px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: 44px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}
.site-nav__link {
  position: relative;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-off-white);
  padding-block: 6px;
  opacity: 0.88;
  transition: opacity var(--dur-fast) var(--ease-editorial);
}
.site-nav__link:hover { opacity: 1; }
.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-editorial);
}
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] {
  opacity: 1;
}
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--color-gold-light);
}

/* Right side */
.site-header__right {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-shrink: 0;
}

.lang-select {
  display: none;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-off-white-dim);
}
@media (min-width: 1100px) {
  .lang-select { display: inline-flex; }
}

.site-header .btn-primary {
  display: none;
  padding: 12px 24px;
  font-size: 13px;
}
@media (min-width: 900px) {
  .site-header .btn-primary { display: inline-flex; }
}

/* Mobile toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-off-white);
  transition: transform var(--dur-fast) var(--ease-editorial),
              opacity var(--dur-fast) var(--ease-editorial);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile menu panel */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--color-charcoal);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 100px var(--container-pad) 60px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--dur-med) var(--ease-editorial),
              visibility var(--dur-med) var(--ease-editorial),
              transform var(--dur-med) var(--ease-editorial);
}
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
@media (min-width: 900px) {
  .mobile-nav { display: none; }
}
.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 48px;
}
.mobile-nav__link {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 500;
  color: var(--color-off-white);
  padding-block: 10px;
  border-bottom: 1px solid var(--color-line-on-dark);
}
.mobile-nav__link[aria-current="page"] {
  color: var(--color-gold-light);
}
.mobile-nav__foot {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}