/* ============================================================
   ANIMATIONS — Villa Lou Bagarède
   Keyframes, scroll reveals, transitions UI
   ============================================================ */


/* ----------------------------------------------------------
   KEYFRAMES
   ---------------------------------------------------------- */

/* Entrée vers le haut */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Entrée depuis la gauche */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Fondu simple */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Scroll indicator — ligne qui descend et remonte */
@keyframes scrollDown {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 1;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
  51% {
    transform: scaleY(1);
    transform-origin: bottom;
    opacity: 1;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0;
  }
}

/* Pulse discret — élément décoratif */
@keyframes subtlePulse {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 0.65; }
}

/* Ligne qui trace de gauche à droite */
@keyframes drawLine {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* Rotation légère — icône chargement */
@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Toast : entrée */
@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Toast : sortie */
@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(4px);
  }
}


/* ----------------------------------------------------------
   HERO — animations au chargement (staggerées)
   ---------------------------------------------------------- */

.hero-title {
  animation: fadeInUp var(--duration-slow) var(--ease-out-expo) 0ms both;
}

.hero-subtitle {
  animation: fadeInUp var(--duration-slow) var(--ease-out-expo) 200ms both;
}

.hero-cta {
  animation: fadeInUp var(--duration-slow) var(--ease-out-expo) 400ms both;
}

/* Scroll indicator — animation infinie */
.scroll-indicator__line {
  animation: scrollDown 2s var(--ease-elegant) 800ms infinite;
}

.scroll-indicator__label {
  animation: fadeIn 0.6s var(--ease-elegant) 1200ms both;
}


/* ----------------------------------------------------------
   SCROLL REVEALS — IntersectionObserver
   ---------------------------------------------------------- */

/* État initial masqué */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity   0.7s var(--ease-out-expo),
    transform 0.7s var(--ease-out-expo);
}

/* Déclenché par JS : ajout de .revealed */
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Variante — depuis la gauche */
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity   0.7s var(--ease-out-expo),
    transform 0.7s var(--ease-out-expo);
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* Variante — depuis la droite */
.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity   0.7s var(--ease-out-expo),
    transform 0.7s var(--ease-out-expo);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* Variante — fondu seul (pas de déplacement) */
.reveal-fade {
  opacity: 0;
  transition: opacity 0.9s var(--ease-out-expo);
}

.reveal-fade.revealed {
  opacity: 1;
}

/* Délais staggerés pour enfants successifs */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children > *:nth-child(6) { transition-delay: 500ms; }

.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity   0.6s var(--ease-out-expo),
    transform 0.6s var(--ease-out-expo);
}

.stagger-children.revealed > * {
  opacity: 1;
  transform: translateY(0);
}


/* ----------------------------------------------------------
   NAV LINK — underline animée
   ---------------------------------------------------------- */

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-elegant);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}


/* ----------------------------------------------------------
   LANGUE — transition de contenu
   ---------------------------------------------------------- */

[data-lang-content] {
  transition: opacity var(--duration-xfast) ease;
}

[data-lang-content].lang-switching {
  opacity: 0;
}


/* ----------------------------------------------------------
   IMAGE HOVER ZOOM
   ---------------------------------------------------------- */

.zoom-hover {
  overflow: hidden;
}

.zoom-hover img {
  transition: transform 1.2s var(--ease-out-expo);
  will-change: transform;
}

.zoom-hover:hover img {
  transform: scale(1.04);
}


/* ----------------------------------------------------------
   HEADER — transition scroll
   ---------------------------------------------------------- */

.site-header {
  transition:
    background-color var(--duration-medium) var(--ease-elegant),
    box-shadow       var(--duration-medium) var(--ease-elegant),
    height           var(--duration-medium) var(--ease-elegant),
    backdrop-filter  var(--duration-medium) var(--ease-elegant);
}


/* ----------------------------------------------------------
   BOUTONS — micro-interactions
   ---------------------------------------------------------- */

.btn {
  transition:
    border-color     0.25s var(--ease-elegant),
    color            0.25s var(--ease-elegant),
    background-color 0.25s var(--ease-elegant),
    opacity          0.2s  var(--ease-elegant);
}

.btn__arrow {
  transition: transform 0.2s var(--ease-elegant);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* CTA réserver dans le header */
.btn-reserve__arrow {
  transition: transform 0.2s var(--ease-elegant);
}

.btn-reserve:hover .btn-reserve__arrow {
  transform: translateX(3px);
}


/* ----------------------------------------------------------
   GALERIE — zoom image
   ---------------------------------------------------------- */

.gallery-item img {
  transition: transform 1.2s var(--ease-out-expo);
  will-change: transform;
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.gallery-item__caption {
  transition:
    opacity   0.35s var(--ease-elegant),
    transform 0.35s var(--ease-elegant);
}


/* ----------------------------------------------------------
   LIGHTBOX — ouverture/fermeture
   ---------------------------------------------------------- */

.lightbox {
  transition: opacity 0.35s var(--ease-elegant);
}

.lightbox.is-open .lightbox__media {
  animation: fadeInUp 0.4s var(--ease-out-expo) both;
}


/* ----------------------------------------------------------
   OVERLAY MOBILE NAV
   ---------------------------------------------------------- */

.nav-overlay {
  transition: opacity 0.35s var(--ease-elegant);
}

.nav-overlay__link {
  transition: color 0.2s var(--ease-elegant);
}

/* Entrée des liens en stagger */
.nav-overlay.is-open .nav-overlay__link {
  animation: fadeInUp 0.5s var(--ease-out-expo) both;
}

.nav-overlay.is-open .nav-overlay__link:nth-child(1) { animation-delay: 80ms; }
.nav-overlay.is-open .nav-overlay__link:nth-child(2) { animation-delay: 140ms; }
.nav-overlay.is-open .nav-overlay__link:nth-child(3) { animation-delay: 200ms; }
.nav-overlay.is-open .nav-overlay__link:nth-child(4) { animation-delay: 260ms; }
.nav-overlay.is-open .nav-overlay__link:nth-child(5) { animation-delay: 320ms; }
.nav-overlay.is-open .nav-overlay__link:nth-child(6) { animation-delay: 380ms; }


/* ----------------------------------------------------------
   FAQ — accordéon
   ---------------------------------------------------------- */

.faq-answer {
  transition: max-height 0.45s var(--ease-out-expo);
}

.faq-question__icon::before,
.faq-question__icon::after {
  transition:
    transform 0.3s var(--ease-elegant),
    opacity   0.2s var(--ease-elegant);
}

.faq-item.is-open .faq-question__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}


/* ----------------------------------------------------------
   SECTION DIVIDER — ligne qui se trace
   ---------------------------------------------------------- */

.section-divider--animated {
  transform-origin: left;
  animation: drawLine 0.8s var(--ease-out-expo) both;
}


/* ----------------------------------------------------------
   NUMÉRO DÉCORATIF — pulse
   ---------------------------------------------------------- */

.section-number {
  animation: subtlePulse 4s ease-in-out infinite;
}


/* ----------------------------------------------------------
   REDUCED MOTION — accessibilité
   ---------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-fade {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .stagger-children > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .zoom-hover img,
  .gallery-item img {
    transition: none;
  }

  .scroll-indicator__line {
    animation: none;
    opacity: 0.5;
  }

}