/* =======================================================
   transitions.css — Fluidité globale du site
   Animations d'entrée au scroll + transitions de page
   ======================================================= */

/* ── Tokens d'animation ───────────────────────────────── */
:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
  --dur-fast: 280ms;
  --dur-base: 480ms;
  --dur-slow: 700ms;
  --dur-xslow: 900ms;
}

/* ═══════════════════════════════════════════════════════
   TRANSITION DE PAGE
   Flash blanc → fondu depuis blanc
   ═══════════════════════════════════════════════════════ */

/* Overlay de transition */
#page-transition-overlay {
  position: fixed;
  inset: 0;
  background: #ffffff;
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transform: scaleY(0);
  transform-origin: top center;
  transition:
    opacity var(--dur-base) var(--ease-out-quart),
    transform var(--dur-base) var(--ease-out-expo);
}

#page-transition-overlay.entering {
  opacity: 1;
  transform: scaleY(1);
  pointer-events: all;
}

/* Corps de page : fondu à l'entrée — OPACITY UNIQUEMENT
   ⚠️  NE PAS ajouter transform ici : ça casserait position:fixed
       sur la navbar et le chatbot (nouveau stacking context CSS). */
body {
  animation: page-fade-in var(--dur-slow) var(--ease-out-expo) both;
}

@keyframes page-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Glissement d'entrée : appliqué sur <main> uniquement, pas sur body */
main {
  animation: main-slide-in var(--dur-slow) var(--ease-out-expo) both;
}

@keyframes main-slide-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  body { animation: none; }
  #page-transition-overlay { transition: none; }
  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale,
  .stagger > * { animation: none !important; opacity: 1 !important; transform: none !important; }
}

/* ═══════════════════════════════════════════════════════
   SCROLL REVEAL — Classes utilitaires
   Ajouter sur les éléments HTML pour qu'ils s'animent
   à l'entrée dans le viewport.
   ═══════════════════════════════════════════════════════ */

/* État initial : invisible, décalé */
.reveal,
.reveal-left,
.reveal-right,
.reveal-scale {
  opacity: 0;
  will-change: opacity, transform;
}

.reveal            { transform: translateY(28px); }
.reveal-left       { transform: translateX(-32px); }
.reveal-right      { transform: translateX(32px); }
.reveal-scale      { transform: scale(0.95) translateY(16px); }

/* État final : visible */
.reveal.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible {
  opacity: 1;
  transform: none;
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
}

/* ── Stagger : les enfants s'animent un par un ────────── */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  will-change: opacity, transform;
}

.stagger.is-visible > * {
  opacity: 1;
  transform: none;
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
}

/* Délais stagger : jusqu'à 8 enfants */
.stagger.is-visible > *:nth-child(1)  { transition-delay:   0ms; }
.stagger.is-visible > *:nth-child(2)  { transition-delay:  70ms; }
.stagger.is-visible > *:nth-child(3)  { transition-delay: 140ms; }
.stagger.is-visible > *:nth-child(4)  { transition-delay: 210ms; }
.stagger.is-visible > *:nth-child(5)  { transition-delay: 280ms; }
.stagger.is-visible > *:nth-child(6)  { transition-delay: 350ms; }
.stagger.is-visible > *:nth-child(7)  { transition-delay: 420ms; }
.stagger.is-visible > *:nth-child(8)  { transition-delay: 490ms; }

/* ── Variante clip : révélation par masque ─────────────── */
.reveal-clip {
  clip-path: inset(0 0 100% 0);
  opacity: 1;
  will-change: clip-path;
}

.reveal-clip.is-visible {
  clip-path: inset(0 0 0% 0);
  transition: clip-path var(--dur-xslow) var(--ease-out-expo);
}

/* ── Variante ligne horizontale (titres) ───────────────── */
.reveal-line {
  overflow: hidden;
}

.reveal-line > span {
  display: block;
  transform: translateY(105%);
  will-change: transform;
}

.reveal-line.is-visible > span {
  transform: translateY(0);
  transition: transform var(--dur-slow) var(--ease-out-expo);
}

/* ═══════════════════════════════════════════════════════
   AMÉLIORATIONS NAVBAR
   ═══════════════════════════════════════════════════════ */

/* Dropdown : remplace l'instant display:block par un fade+glissement */
#main-nav .group:hover .absolute,
#main-nav .group:focus-within .absolute {
  /* override tailwind opacity-0/invisible */
  animation: dropdown-in var(--dur-fast) var(--ease-out-expo) forwards !important;
}

@keyframes dropdown-in {
  from {
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
  }
}

/* Lien nav : soulignement animé */
#main-nav a,
#main-nav button {
  position: relative;
}





/* Navbar scroll : transition fluide du fond */
#main-nav {
  transition:
    background-color var(--dur-base) var(--ease-out-quart),
    box-shadow var(--dur-base) var(--ease-out-quart),
    backdrop-filter var(--dur-base) var(--ease-out-quart);
}

#main-nav.scrolled {
  background-color: rgba(255, 255, 255, 0.92) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(26, 60, 94, 0.08) !important;
}

/* ═══════════════════════════════════════════════════════
   CARTES & BOUTONS — micro-interactions uniformes
   ═══════════════════════════════════════════════════════ */

/* Toutes les cartes (surcharge index.css) */
.card,
[class*="rounded-xl"],
[class*="rounded-lg"] {
  transition:
    box-shadow var(--dur-fast) var(--ease-out-quart),
    transform var(--dur-fast) var(--ease-out-quart) !important;
}

.card:hover {
  box-shadow: 0 8px 32px rgba(26, 60, 94, 0.12) !important;
  transform: translateY(-4px) !important;
}

/* Tous les boutons */
.btn,
a[class*="bg-[#"],
a[class*="bg-primary"],
a[class*="bg-secondary"],
button[class*="bg-[#"] {
  transition:
    background-color var(--dur-fast) var(--ease-out-quart),
    transform var(--dur-fast) var(--ease-out-quart),
    box-shadow var(--dur-fast) var(--ease-out-quart) !important;
}

.btn:hover,
a[class*="bg-[#"]:hover,
a[class*="bg-primary"]:hover,
a[class*="bg-secondary"]:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.btn:active,
a[class*="bg-[#"]:active,
a[class*="bg-primary"]:active {
  transform: translateY(0px);
  box-shadow: none;
}

/* FAB */
button[class*="fixed bottom"] {
  transition:
    transform var(--dur-fast) var(--ease-out-expo),
    box-shadow var(--dur-fast) var(--ease-out-quart) !important;
}

/* ═══════════════════════════════════════════════════════
   HERO CAROUSEL — transitions internes améliorées
   ═══════════════════════════════════════════════════════ */

.hero-slide {
  transition: opacity 800ms var(--ease-in-out-quart) !important;
}

/* ═══════════════════════════════════════════════════════
   ACCORDION FAQ — transition souple
   ═══════════════════════════════════════════════════════ */

.accordion-content {
  transition:
    max-height var(--dur-base) var(--ease-out-expo),
    padding var(--dur-base) var(--ease-out-expo) !important;
}

/* ═══════════════════════════════════════════════════════
   IMAGES — fade-in au chargement
   ═══════════════════════════════════════════════════════ */

img:not([src=""]):not([data-no-fade]) {
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out-quart);
}

img.loaded {
  opacity: 1 !important;
}

/* Éviter le flash sur les images déjà en cache */
img.img-ready {
  opacity: 1 !important;
  transition: none !important;
}

/* ----------------------------------------------------
   TOUR ANIMATIONS
   ---------------------------------------------------- */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes tourFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}