/* ============================================
   HEADER — sticky, semi-transparent, no content overlap
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: var(--z-header);
  background: rgba(15,15,15,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-gold);
  transition: background var(--duration) var(--ease),
              border-color var(--duration) var(--ease);
}

.site-header--scrolled {
  background: rgba(15,15,15,0.97);
  border-color: var(--border-strong);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  gap: var(--sp-6);
}

/* ---- Logo ---- */
.site-header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.site-header__logo img {
  height: 36px;
  width: auto;
  filter: brightness(1.1);
}

/* ---- Desktop nav ---- */
.site-header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav-list__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-muted);
  padding-block: var(--sp-2);
  position: relative;
  transition: color var(--duration) var(--ease);
}

.nav-list__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 100%;
  height: 1px;
  background: var(--gold);
  transition: right var(--duration) var(--ease);
}

.nav-list__link:hover,
.nav-list__item--active .nav-list__link {
  color: var(--gold-light);
}

.nav-list__link:hover::after,
.nav-list__item--active .nav-list__link::after {
  right: 0;
}

/* ---- Submenu ---- */
.nav-list--sub {
  position: absolute;
  top: calc(100% + var(--sp-2));
  left: 0;
  min-width: 200px;
  background: var(--surface);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--sp-2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease);
  z-index: var(--z-overlay);
  flex-direction: column;
  gap: 0;
}

.nav-list__item:hover .nav-list--sub {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-list__item { position: relative; }

/* ---- Actions (lang + whatsapp + hamburger) ---- */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-shrink: 0;
}

/* ---- Language switcher ---- */
.lang-switcher {
  display: flex;
  gap: var(--sp-2);
}

.lang-switcher__link {
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  color: var(--text-faint);
  padding: var(--sp-1) var(--sp-2);
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.lang-switcher__link:hover,
.lang-switcher__link--active {
  color: var(--gold-light);
  background: rgba(209,194,176,0.08);
}

/* ---- Hamburger (mobile) ---- */
.site-header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  padding: var(--sp-2);
  transition: background var(--duration) var(--ease);
}

.site-header__hamburger:hover { background: var(--surface-2); }

.hamburger__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: var(--radius-full);
  transform-origin: center;
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.site-header__hamburger[aria-expanded="true"] .hamburger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-header__hamburger[aria-expanded="true"] .hamburger__bar:nth-child(2) {
  opacity: 0;
}
.site-header__hamburger[aria-expanded="true"] .hamburger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Mobile nav drawer ---- */
@media (max-width: 768px) {
  .site-header { height: var(--header-h); }

  .site-header__hamburger { display: flex; }

  .site-header__nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15,15,15,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--sp-8) var(--container-pad);
    opacity: 0;
    pointer-events: none;
    transform: translateX(100%);
    transition: opacity var(--duration-lg) var(--ease),
                transform var(--duration-lg) var(--ease);
    z-index: var(--z-header);
    overflow-y: auto;
  }

  .site-header__nav--open {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  .nav-list__link {
    font-size: var(--text-lg);
    padding: var(--sp-3) 0;
  }

  .nav-list--sub {
    position: static;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding-left: var(--sp-4);
  }
}

@media (min-width: 769px) {
  .site-header { height: var(--header-h-md); }
}