/* ── Keyframes ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Classes d'entrée au chargement ── */
.anim-fade-in  { animation: fadeIn  0.6s ease both; }
.anim-fade-up  { animation: fadeUp  0.8s ease both; }
.anim-delay-1  { animation-delay: 0.15s; }
.anim-delay-2  { animation-delay: 0.30s; }
.anim-delay-3  { animation-delay: 0.45s; }
.anim-delay-4  { animation-delay: 0.60s; }

/* ── Reveal au scroll (Intersection Observer) ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.10s; }
.reveal-d2 { transition-delay: 0.20s; }
.reveal-d3 { transition-delay: 0.30s; }
.reveal-d4 { transition-delay: 0.40s; }

/* ── Hover images ── */
.hover-zoom {
  overflow: hidden;
}
.hover-zoom img,
.hover-zoom .zoom-inner {
  transition: transform var(--ease-slow);
}
.hover-zoom:hover img,
.hover-zoom:hover .zoom-inner {
  transform: scale(1.04);
}

/* ── Hover liens nav ── */
.nav-link {
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--color-black);
  transition: width var(--ease-default);
}
.nav-link:hover::after { width: 100%; }
.nav-link:hover { color: var(--color-black); }

/* ── Hover boutons ── */
.btn-dark {
  position: relative;
  display: inline-flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  font-size: var(--text-xs);
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  padding: 0.85rem 1.5rem;
  transition: opacity var(--ease-default);
}
.btn-dark:hover { opacity: 0.8; }

.btn-outline {
  font-size: var(--text-xs);
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-black);
  padding-bottom: 2px;
  transition: opacity var(--ease-default);
  text-decoration: none;
  color: var(--color-black);
}
.btn-outline:hover { opacity: 0.4; }

/* ── Transition entre pages ── */
body { animation: fadeIn 0.4s ease both; }

/* ── Désactivation pour prefers-reduced-motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}