/* ==============================================
   HEADER — VietnamLife Platform
   Glassmorphism · City Selector · Mobile Overlay
   2026
============================================== */

/* ==============================================
   SITE HEADER
============================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition:
    background var(--transition-base),
    backdrop-filter var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.site-header.scrolled {
  background: rgba(10, 15, 24, 0.82);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}

/* ==============================================
   HEADER CONTAINER
============================================== */
.header-container {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: var(--header-h);
  max-width: var(--container-2xl);
}

/* ==============================================
   LOGO
============================================== */
.site-logo {
  flex-shrink: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  line-height: 1;
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.85;
}

.header-mobile-rentals {
  display: none;
}

.logo-vn {
  color: var(--clr-text);
}

.logo-life {
  color: var(--clr-accent);
  margin-left: 2px;
}

/* ==============================================
   CITY SELECTOR
============================================== */
.header-city {
  position: relative;
  flex-shrink: 0;
}

.header-city__btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.header-city__btn:hover,
.header-city__btn[aria-expanded="true"] {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-hover);
  color: var(--clr-text);
}

.header-city__icon {
  color: var(--clr-accent);
  flex-shrink: 0;
}

.header-city__chevron {
  color: var(--clr-text-muted);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.header-city__btn[aria-expanded="true"] .header-city__chevron {
  transform: rotate(180deg);
}

/* City Dropdown */
.header-city__dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  background: rgba(17, 24, 39, 0.96);
  backdrop-filter: var(--glass-blur-lg);
  -webkit-backdrop-filter: var(--glass-blur-lg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.98);
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
  pointer-events: none;
}

.header-city__dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.city-dropdown__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.city-dropdown__item:hover {
  background: var(--glass-bg-strong);
}

.city-dropdown__name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--clr-text);
  transition: color var(--transition-fast);
}

.city-dropdown__item:hover .city-dropdown__name {
  color: var(--clr-accent);
}

.city-dropdown__desc {
  font-size: var(--text-xs);
  color: var(--clr-text-muted);
}

/* ==============================================
   DESKTOP NAV
============================================== */
.header-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: clamp(var(--space-4), 2.5vw, var(--space-8));
  align-items: center;
}

.nav-menu li {
  position: relative;
}

.nav-menu > li > a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-block: var(--space-2);
  color: rgba(240, 236, 228, 0.80);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.header-partners-link {
  display: inline-flex;
  align-items: center;
  margin-left: var(--space-5);
  padding: 7px 12px;
  border: 1px solid rgba(20, 184, 166, .55);
  border-radius: var(--radius-full);
  color: var(--clr-accent);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 650;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.header-partners-link:hover { background: rgba(20, 184, 166, .12); }

/* Animated underline */
.nav-menu > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1.5px;
  background: var(--clr-accent);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition:
    width var(--transition-base),
    left var(--transition-base);
}

.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a,
.nav-menu > li.current_page_item > a,
.nav-menu > li.current-menu-ancestor > a {
  color: var(--clr-text);
}

.nav-menu > li > a:hover::after,
.nav-menu > li.current-menu-item > a::after,
.nav-menu > li.current_page_item > a::after,
.nav-menu > li.current-menu-ancestor > a::after {
  width: 100%;
}

/* Dropdown sub-menu */
.nav-menu .sub-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background: rgba(17, 24, 39, 0.96);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
  pointer-events: none;
}

.nav-menu li:hover .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.nav-menu .sub-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.nav-menu .sub-menu a:hover {
  background: var(--glass-bg-strong);
  color: var(--clr-text);
}

/* ==============================================
   HEADER ACTIONS
============================================== */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  margin-left: auto;
}

.header-login {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ==============================================
   BURGER BUTTON
============================================== */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.burger:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-hover);
}

.burger__line {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--clr-text);
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-base),
    opacity var(--transition-fast),
    width var(--transition-base);
  transform-origin: center;
}

/* Burger → X animation */
.burger.is-active .burger__line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.burger.is-active .burger__line:nth-child(2) {
  opacity: 0;
  width: 0;
}
.burger.is-active .burger__line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ==============================================
   MOBILE MENU OVERLAY
============================================== */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: stretch;
  pointer-events: none;
  visibility: hidden;
  overflow-x: hidden;
}

.mobile-menu.is-open {
  pointer-events: auto;
  visibility: visible;
}

.mobile-menu__inner {
  position: relative;
  width: min(380px, 100%);
  height: 100%;
  background: rgba(10, 15, 24, 0.98);
  backdrop-filter: var(--glass-blur-lg);
  -webkit-backdrop-filter: var(--glass-blur-lg);
  border-right: 1px solid var(--glass-border);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
}

.mobile-menu.is-open .mobile-menu__inner {
  transform: translateX(0);
}

/* Close button */
.mobile-menu__close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-muted);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.mobile-menu__close:hover {
  background: var(--glass-bg-strong);
  color: var(--clr-text);
}

/* Logo in mobile menu */
.mobile-menu__logo {
  display: inline-flex;
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-decoration: none;
  margin-top: var(--space-4);
}

/* Section label */
.mobile-menu__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-subtle);
  margin-bottom: var(--space-3);
}

/* Cities grid */
.mobile-menu__cities {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.mobile-city-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--clr-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.mobile-city-link:hover {
  background: var(--glass-bg-strong);
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

/* Mobile nav links */
.mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav-list a {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  color: var(--clr-text-muted);
  font-size: var(--text-md);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.mobile-nav-list__partners {
  display: block;
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid rgba(20, 184, 166, .45);
  border-radius: var(--radius-sm);
  color: var(--clr-accent);
  font-weight: 700;
  text-decoration: none;
}

.mobile-nav-list a:hover {
  background: var(--glass-bg);
  color: var(--clr-text);
}

.mobile-nav-list li.current-menu-item a {
  color: var(--clr-accent);
  background: var(--glass-bg-sand);
}

/* CTA в мобильном меню */
.mobile-menu__cta {
  margin-top: auto;
  width: 100%;
  justify-content: center;
  font-size: var(--text-md);
  padding: var(--space-4);
}

/* ==============================================
   BACKDROP
============================================== */
.mobile-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-modal) - 1);
  background: rgba(5, 8, 12, 0.70);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-slow),
    visibility var(--transition-slow);
}

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

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

/* До 1024px — прячем nav, показываем бургер */
@media (max-width: 1024px) {
  .header-nav {
    display: none;
  }

  .burger {
    display: flex;
  }

  .header-actions {
    margin-left: auto;
  }
}

/* До 640px — прячем login кнопку, оставляем бургер */
@media (max-width: 640px) {
  .header-login {
    display: none;
  }

  .header-container {
    gap: var(--space-3);
    min-width: 0;
  }

  .site-logo {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 132px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .header-actions {
    gap: 6px;
    min-width: 0;
  }

  .header-mobile-rentals {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 0 10px;
    border: 1px solid rgba(20, 184, 166, 0.5);
    border-radius: 10px;
    color: var(--clr-accent);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 750;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
  }

  .burger {
    flex: 0 0 36px;
    width: 36px;
    height: 36px;
  }

  .header-city__label {
    display: none;
  }

  .header-city__btn {
    padding: var(--space-2);
    gap: var(--space-1);
  }
}

/* On narrow phones the city selector competes with the logo and action
   controls. Keep the header contents within the viewport on every template. */
@media (max-width: 520px) {
  .header-city {
    display: none;
  }

  .header-container {
    gap: 8px;
  }

  .site-logo {
    max-width: 130px;
  }

  .header-mobile-rentals {
    padding: 0 9px;
    font-size: 0.76rem;
  }
}

@media (max-width: 390px) {
  .rentals-header-lang {
    gap: 1px;
    padding: 2px;
  }

  .rentals-header-lang a {
    min-width: 25px;
    min-height: 26px;
    padding: 0 5px;
    font-size: 0.68rem;
  }
}

/* До 400px */
@media (max-width: 400px) {
  .header-city {
    display: none;
  }
}