/* ==========================================================================
   HEADER — At Home
   Header sticky bilingue con nav, dropdown appartamenti, toggle lingua
   e menu mobile. Naming BEM (.header__*).
   Mobile-first: la nav desktop compare da 768px in su.
   ========================================================================== */

/* --------------------------------------------------------------------------
   CONTENITORE HEADER — glassmorphism
   Sfondo semi-trasparente con blur: il contenuto scorrendo sotto resta
   percepibile ma sfocato. Il bordo inferiore sottile ne definisce i limiti.
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(31, 48, 53, 0.72);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--colore-pietra);
}

/* Barra di navigazione: logo sinistra, link dopo, azioni destra */
.header__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* --------------------------------------------------------------------------
   BRAND
   Nome quasi sussurrato: serif italic, lettering ampio.
   -------------------------------------------------------------------------- */
.header__brand {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--peso-regular);
  font-size: var(--dim-brand);
  letter-spacing: var(--spaziatura-brand);
  color: var(--colore-pietra);
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition-base);
}

.header__brand:hover {
  color: var(--colore-vetro);
  opacity: 0.85;
}

/* Logo immagine: selettore specifico per vincere su reset img { height: auto } */
.header__brand .header__logo {
  height: 48px;
  max-height: 48px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  display: block;
}

/* --------------------------------------------------------------------------
   LINK DI NAVIGAZIONE (desktop)
   Nascosti su mobile, mostrati come flex da 768px in su.
   -------------------------------------------------------------------------- */
.header__links {
  display: none;
}

.header__item {
  position: relative;
}

/* Stile comune a link e bottone dropdown */
.header__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-weight: var(--peso-medium);
  font-size: var(--dim-label);
  text-transform: uppercase;
  letter-spacing: var(--spaziatura-label);
  color: var(--colore-pietra);
  opacity: 0.75;
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  padding-bottom: 3px;
}

/* Linea di navigazione attiva — appare in hover e sul link corrente */
.header__link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--colore-vetro);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.header__link:hover::after,
.header__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.header__link:hover,
.header__link:focus-visible {
  opacity: 1;
  color: var(--colore-vetro);
}

.header__link[aria-current="page"] {
  opacity: 1;
}

/* Chevron del dropdown */
.header__chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-base);
}

/* Ruota la freccia quando il dropdown è aperto */
.header__dropdown-toggle[aria-expanded="true"] .header__chevron {
  transform: rotate(180deg);
}

/* --------------------------------------------------------------------------
   DROPDOWN APPARTAMENTI
   Sfondo laguna leggermente schiarito, animato in apparizione.
   -------------------------------------------------------------------------- */
.header__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  padding: var(--space-xs) 0;
  background-color: var(--colore-bg-scuro);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  /* Nascosto di default, appare solo con click (aria-expanded) */
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base),
    visibility var(--transition-base);
}

/* Aperto solo via JS quando aria-expanded="true" — nessun hover */
.header__item--dropdown:has([aria-expanded="true"]) .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__dropdown-link {
  display: block;
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-body);
  font-weight: var(--peso-medium);
  font-size: var(--dim-label);
  text-transform: uppercase;
  letter-spacing: var(--spaziatura-label);
  color: var(--colore-pietra);
  opacity: 0.75;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition-base);
}

.header__dropdown-link:hover,
.header__dropdown-link:focus-visible {
  opacity: 1;
  color: var(--colore-vetro);
}

/* --------------------------------------------------------------------------
   AZIONI — toggle lingua + burger
   -------------------------------------------------------------------------- */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-left: auto;
}

/* Toggle lingua: discreto, la lingua attiva è in vetro */
.header__lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-weight: var(--peso-medium);
  font-size: var(--dim-label);
  letter-spacing: var(--spaziatura-label);
  color: var(--colore-pietra);
  background: none;
  border: none;
  cursor: pointer;
}

.header__lang-option {
  opacity: 0.5;
  transition: var(--transition-base);
}

.header__lang-option--active {
  opacity: 1;
  color: var(--colore-vetro);
}

.header__lang-sep {
  opacity: 0.5;
}

/* --------------------------------------------------------------------------
   BURGER MENU (solo mobile)
   Tre linee che diventano una X quando il menu è aperto.
   -------------------------------------------------------------------------- */
.header__menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

/* Linea centrale: le pseudo-elementi creano la prima e la terza linea */
.header__burger,
.header__burger::before,
.header__burger::after {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--colore-pietra);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header__burger {
  position: relative;
}

.header__burger::before,
.header__burger::after {
  content: "";
  position: absolute;
  left: 0;
}

.header__burger::before {
  top: -7px;
}

.header__burger::after {
  top: 7px;
}

/* Stato aperto: la linea centrale sparisce, le altre formano una X */
.header__menu-toggle[aria-expanded="true"] .header__burger {
  background-color: transparent;
}

.header__menu-toggle[aria-expanded="true"] .header__burger::before {
  top: 0;
  transform: rotate(45deg);
}

.header__menu-toggle[aria-expanded="true"] .header__burger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   MENU MOBILE — fullscreen overlay
   Copre l'intera pagina con slide top-down. Le voci entrano da sinistra
   una alla volta tramite la classe .mobile-menu--animato (aggiunta da JS).
   -------------------------------------------------------------------------- */

.header__mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99; /* sotto l'header (z-index: 100) ma sopra tutto il resto */
  background-color: var(--colore-sfondo);
  display: flex;
  align-items: center;
  padding: var(--space-3xl) var(--container-padding);
  transform: translateY(-100%);
  visibility: hidden;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s linear 0.55s;
}

.header__mobile-menu[aria-hidden="false"] {
  transform: translateY(0);
  visibility: visible;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s linear 0s;
}

/* Contenuto del menu */
.mobile-menu__contenuto {
  width: 100%;
}

.mobile-menu__lista {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* Ogni voce parte invisibile e spostata a sinistra */
.mobile-menu__item,
.mobile-menu__separatore,
.mobile-menu__social {
  opacity: 0;
  transform: translateX(-32px);
}

/* Stile dei link nel menu fullscreen */
.mobile-menu__link {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--peso-light);
  font-size: 1.75rem;
  color: var(--colore-pietra);
  opacity: 0.85;
  text-decoration: none;
  transition: opacity var(--transition-base), color var(--transition-base);
  line-height: 1.15;
}

.mobile-menu__link:hover,
.mobile-menu__link:focus-visible {
  opacity: 1;
  color: var(--colore-vetro);
}

/* Linea separatore */
.mobile-menu__separatore {
  height: 1px;
  background-color: rgba(255, 255, 255, 0.1);
  margin: var(--space-2xl) 0 var(--space-xl);
}

/* Social icons */
.mobile-menu__social {
  display: flex;
  gap: var(--space-xl);
}

.mobile-menu__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--colore-pietra);
  opacity: 0.6;
  text-decoration: none;
  transition: opacity var(--transition-base), color var(--transition-base);
}

.mobile-menu__social-link:hover,
.mobile-menu__social-link:focus-visible {
  opacity: 1;
  color: var(--colore-vetro);
}

.mobile-menu__social-link svg {
  width: 24px;
  height: 24px;
  display: block;
}

/* Animazioni a cascata — attivate da JS tramite .mobile-menu--animato */
@keyframes mobileItemIn {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

.mobile-menu--animato .mobile-menu__item:nth-child(1) { animation: mobileItemIn 0.4s ease 0.1s both; }
.mobile-menu--animato .mobile-menu__item:nth-child(2) { animation: mobileItemIn 0.4s ease 0.19s both; }
.mobile-menu--animato .mobile-menu__item:nth-child(3) { animation: mobileItemIn 0.4s ease 0.28s both; }
.mobile-menu--animato .mobile-menu__item:nth-child(4) { animation: mobileItemIn 0.4s ease 0.37s both; }
.mobile-menu--animato .mobile-menu__item:nth-child(5) { animation: mobileItemIn 0.4s ease 0.46s both; }
.mobile-menu--animato .mobile-menu__separatore        { animation: mobileItemIn 0.35s ease 0.55s both; }
.mobile-menu--animato .mobile-menu__social            { animation: mobileItemIn 0.35s ease 0.63s both; }

/* --------------------------------------------------------------------------
   BREAKPOINT DESKTOP (768px+)
   La nav orizzontale compare, burger e menu mobile spariscono.
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
  .header__nav {
    height: 76px;
  }

  .header__brand .header__logo {
    height: 56px;
    max-height: 56px;
    max-width: 200px;
  }

  .header__nav {
    gap: var(--space-xl);
    justify-content: flex-start;
  }

  .header__links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
    margin: 0;
    padding: 0;
  }

  /* Su desktop il menu mobile e il burger non servono */
  .header__menu-toggle,
  .header__mobile-menu {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .header__mobile-menu {
    transform: none;
    opacity: 0;
    transition: opacity 0.2s ease, visibility 0s linear 0.2s;
  }
  .header__mobile-menu[aria-hidden="false"] {
    opacity: 1;
    transition: opacity 0.2s ease, visibility 0s linear 0s;
  }
  .mobile-menu__item,
  .mobile-menu__separatore,
  .mobile-menu__social {
    opacity: 1;
    transform: none;
    animation: none;
  }
}