/*
  Studio 36 — Header desktop/tablette/mobile (design.md §6).
  Comportement au scroll et menu mobile geres par header.js/mobile-menu.js ;
  ce fichier ne fait que reagir aux attributs [data-scrolled]/[data-hero]/
  [data-menu-open] poses par ces scripts.
*/

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  padding-block: var(--space-5);
  transition:
    background-color var(--duration-standard) var(--ease-out),
    backdrop-filter var(--duration-standard) var(--ease-out),
    padding-block var(--duration-standard) var(--ease-out),
    border-color var(--duration-standard) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header[data-hero="true"]:not([data-scrolled="true"]) {
  background: linear-gradient(to bottom, rgba(6, 6, 7, 0.6), transparent);
}

.site-header[data-scrolled="true"] {
  padding-block: var(--space-3);
  background: rgba(21, 21, 23, 0.92);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border-hairline);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-header__logo {
  display: block;
  flex-shrink: 0;
  line-height: 0;
}

.site-header__logo-full {
  display: none;
  /* Depasse maintenant volontairement la hauteur du bouton primaire a cote
     (~43px) : le header s'agrandit legerement pour l'accueillir, ce qui est
     attendu au-dela de cette taille (align-items:center sur
     .site-header__inner cale la ligne sur son plus grand enfant). */
  height: 56px;
  width: auto;
}

.site-header__logo-compact {
  display: block;
  height: 56px;
  width: 56px;
}

@media (min-width: 768px) {
  .site-header__logo-full {
    display: block;
  }

  .site-header__logo-compact {
    display: none;
  }
}

/* ---------- Nav centrale (desktop >= 1024px uniquement, design.md §6.1) ---------- */

.site-header__nav {
  display: none;
}

@media (min-width: 1024px) {
  .site-header__nav {
    display: flex;
    align-items: center;
    gap: 40px;
  }
}

.site-header__nav-item {
  position: relative;
}

.site-header__nav-link {
  display: inline-block;
  padding-block: var(--space-2);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 2px;
  text-underline-offset: 8px;
  transition: color 150ms var(--ease-out), text-decoration-color 150ms var(--ease-out);
}

/* Survol = liseret or, page active = liseret rouge (regle ci-dessous) :
   meme logique bicolore que les autres composants interactifs. */
.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--text-primary);
  text-decoration-color: var(--accent-warm);
}

.site-header__nav-link[aria-current="page"] {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 8px;
}

/* ---------- Actions (contact + reserver), desktop/tablette ---------- */

.site-header__actions {
  display: none;
  align-items: center;
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .site-header__actions {
    display: flex;
  }
}

.site-header__reserve-compact {
  display: inline-flex;
}

@media (min-width: 1024px) {
  .site-header__reserve-compact {
    display: none;
  }
}

/* ---------- Hamburger (< 1024px) ---------- */

.site-header__hamburger {
  display: inline-flex;
}

@media (min-width: 1024px) {
  .site-header__hamburger {
    display: none;
  }
}

/* ---------- Mega-menu "Les studios" (desktop uniquement, design.md §6.5) ---------- */

.mega-menu {
  position: absolute;
  top: calc(100% + var(--space-3));
  /* Ancre a gauche du declencheur (pas centre) : "Les studios" est proche du
     bord gauche du header, un centrage deborderait hors viewport. */
  left: 0;
  transform: translateY(4px);
  /* Reduit de 720 a 560px : dimensionne pour 4 colonnes a l'origine, ca
     laissait les vignettes trop larges/hautes une fois passe a 3 studios
     (aspect-ratio 3:4 fixe par vignette). */
  width: min(560px, 90vw);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--elevation-3-shadow);
  padding: var(--space-5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 150ms var(--ease-out), transform 150ms var(--ease-out), visibility 150ms;
}

.site-header__nav-item[data-mega-open="true"] .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.mega-menu__item {
  position: relative;
  display: block;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-sm);
  overflow: hidden;
  isolation: isolate;
}

.mega-menu__item-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  /* Degrade teinte couleur signature tant qu'aucune photo n'est publiee. */
  background: linear-gradient(160deg, color-mix(in srgb, var(--studio-color) 35%, var(--surface-1)), var(--surface-1));
}

img.mega-menu__item-bg,
video.mega-menu__item-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: none;
}

.mega-menu__item--plateau-show { --studio-color: var(--studio-plateau-show); }
.mega-menu__item--brique-room { --studio-color: var(--studio-brique-room); }
.mega-menu__item--blue-room { --studio-color: var(--studio-blue-room); }

.mega-menu__item-label {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  padding: var(--space-3);
  background: linear-gradient(to top, rgba(6, 6, 7, 0.75), transparent 60%);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--text-primary);
}

.mega-menu__footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-hairline);
  text-align: right;
}

@media (prefers-reduced-motion: reduce) {
  .mega-menu {
    transition: opacity 80ms linear;
    transform: translateY(0);
  }
}

/* ---------- Menu plein ecran mobile/tablette (< 1024px, design.md §6.6) ---------- */

/*
  display: none par defaut (respecte [hidden]) ; :not([hidden]) bascule en
  flex uniquement quand mobile-menu.js retire l'attribut. Ne jamais mettre
  `display: flex` sur la regle de base : elle l'emporterait sur la regle UA
  [hidden] { display: none } (meme specificite, feuille auteur apres feuille
  UA) et le menu resterait pose en plein ecran, invisible mais interceptant
  tous les clics de la page (bug reel rencontre sur .modal-scrim, voir
  modal.css et PROGRESS.md Phase 3).
*/
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg-base);
  display: none;
  flex-direction: column;
  padding: var(--space-5) var(--space-5) calc(var(--space-6) + env(safe-area-inset-bottom));
  transform: translateY(-16px);
  opacity: 0;
  transition: opacity 250ms var(--ease-out), transform 250ms var(--ease-out);
  overflow-y: auto;
}

.mobile-menu:not([hidden]) {
  display: flex;
}

.mobile-menu[data-open="true"] {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-menu__logo {
  height: 56px;
  width: 56px;
}

.mobile-menu__list {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-h3-size);
  line-height: var(--text-h3-line);
  color: var(--text-primary);
}

.mobile-menu__link[aria-current="page"] {
  color: var(--accent);
}

.mobile-menu__separator {
  margin-block: var(--space-6);
  border: none;
  border-top: 1px solid var(--border-hairline);
}

.mobile-menu__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-menu__actions .btn {
  width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .mobile-menu {
    transition: opacity 80ms linear;
    transform: none;
  }
}