/* ===========================
   HEADER
   Premium, responsive, animated
   =========================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  padding: var(--space-5) 0;
  transition: background-color var(--duration-slow) var(--ease),
              padding var(--duration-slow) var(--ease),
              box-shadow var(--duration-slow) var(--ease);
}

.header.scrolled {
  background-color: rgba(251, 248, 243, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: var(--space-3) 0;
  box-shadow: 0 1px 20px rgba(44, 40, 37, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 56px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  z-index: calc(var(--z-overlay) + 2);
}

.logo-img {
  height: 75px;
  width: auto;
  transition: height var(--duration-normal) var(--ease);
}

/* Desktop Nav */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease);
  position: relative;
  padding: var(--space-2) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-dark));
  transition: width var(--duration-normal) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-gold);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Header CTA */
.header-cta {
  margin-left: var(--space-4);
}

/* Language Switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.lang-switch a {
  padding: var(--space-1) var(--space-2);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease);
  border-radius: var(--radius-sm);
}

.lang-switch a:hover,
.lang-switch a.active {
  color: var(--color-gold);
}

.lang-switch-sep {
  color: var(--color-sand);
}

/* ===========================
   MOBILE MENU TOGGLE
   Modern hamburger with animation
   =========================== */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0;
  width: 44px;
  height: 44px;
  cursor: pointer;
  z-index: calc(var(--z-overlay) + 2);
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-text-primary);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast) var(--ease);
  transform-origin: center;
  position: absolute;
}

.menu-toggle span:nth-child(1) { top: 14px; }
.menu-toggle span:nth-child(2) { top: 21px; }
.menu-toggle span:nth-child(3) { top: 28px; }

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.menu-toggle.active {
  outline: none;
}

.menu-toggle.active:focus-visible {
  box-shadow: none;
}

/* ===========================
   MOBILE NAV
   Full-screen overlay with staggered animations
   =========================== */
.nav-mobile {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--color-cream);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow) var(--ease-out);
  padding: 80px var(--space-6) var(--space-8);
}

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

.nav-mobile .nav-link {
  display: block;
  width: 100%;
  max-width: 320px;
  font-size: 1.75rem;
  font-family: var(--font-primary);
  font-weight: var(--weight-light);
  text-transform: none;
  letter-spacing: 0.01em;
  color: var(--color-text-primary);
  padding: var(--space-4) 0;
  border-bottom: 1px solid rgba(44, 40, 37, 0.06);
  text-align: left;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              color var(--duration-fast) var(--ease),
              padding-left var(--duration-fast) var(--ease);
}

.nav-mobile.open .nav-link {
  opacity: 1;
  transform: translateY(0);
}

.nav-mobile.open .nav-link:nth-child(1) { transition-delay: 60ms; }
.nav-mobile.open .nav-link:nth-child(2) { transition-delay: 110ms; }
.nav-mobile.open .nav-link:nth-child(3) { transition-delay: 160ms; }
.nav-mobile.open .nav-link:nth-child(4) { transition-delay: 210ms; }
.nav-mobile.open .nav-link:nth-child(5) { transition-delay: 260ms; }
.nav-mobile.open .nav-link:nth-child(6) { transition-delay: 310ms; }
.nav-mobile.open .nav-link:nth-child(7) { transition-delay: 360ms; }
.nav-mobile.open .nav-link:nth-child(8) { transition-delay: 410ms; }

.nav-mobile .nav-link::after {
  display: none;
}

.nav-mobile .nav-link:hover,
.nav-mobile .nav-link.active {
  color: var(--color-gold);
  padding-left: var(--space-3);
}

.nav-mobile .lang-switch {
  margin-top: auto;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--duration-normal) var(--ease-out) 450ms,
              transform var(--duration-normal) var(--ease-out) 450ms;
}

.nav-mobile.open .lang-switch {
  opacity: 1;
  transform: translateY(0);
}

.nav-mobile .lang-switch a {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease);
}

.nav-mobile .lang-switch a:hover,
.nav-mobile .lang-switch a.active {
  color: var(--color-gold);
}

.nav-mobile .nav-reserve {
  margin-top: var(--space-6);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--duration-normal) var(--ease-out) 500ms,
              transform var(--duration-normal) var(--ease-out) 500ms;
}

.nav-mobile.open .nav-reserve {
  opacity: 1;
  transform: translateY(0);
}

/* Hero variant - transparent header */
.header--hero {
  background-color: transparent;
}

.header--hero .nav-link {
  color: var(--color-white);
}

.header--hero .menu-toggle span {
  background-color: var(--color-white);
}

.header--hero .nav-mobile .nav-link {
  color: var(--color-text-primary);
}

.header--hero .nav-mobile .lang-switch a {
  color: var(--color-text-muted);
}

.header--hero .nav-mobile .lang-switch a.active {
  color: var(--color-gold);
}

.header--hero.scrolled {
  background-color: rgba(251, 248, 243, 0.97);
}

.header--hero.scrolled .nav-link {
  color: var(--color-text-primary);
}

.header--hero.scrolled .menu-toggle span {
  background-color: var(--color-text-primary);
}

/* ===========================
   RESPONSIVE BREAKPOINTS
   =========================== */

/* Tablet & below: 1024px */
@media (max-width: 1024px) {
  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .header-inner {
    padding: 0 var(--space-4);
  }
}

/* Mobile: 640px */
@media (max-width: 640px) {
  .header-inner {
    height: 52px;
  }

  .logo-img {
    height: 32px;
  }

  .nav-mobile .nav-link {
    font-size: 1.5rem;
  }
}