/* =========================================================================
   ANIMATIONS — révélations au scroll + keyframes
   ====================================================================== */

/* ---- Révélation au défilement (piloté par IntersectionObserver, JS) ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.8s var(--ease-out),
    transform 0.8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal="left"]  { transform: translateX(-36px); }
[data-reveal="right"] { transform: translateX(36px); }
[data-reveal="scale"] { transform: scale(0.92); }
[data-reveal="clip"]  { transform: none; clip-path: inset(0 0 100% 0); transition: clip-path 0.9s var(--ease-out); opacity: 1; }

.is-revealed[data-reveal] {
  opacity: 1;
  transform: none;
  clip-path: inset(0 0 0 0);
}

/* Conteneur à révélation échelonnée : les enfants apparaissent en cascade */
[data-stagger] > * {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
[data-stagger].is-revealed > * {
  opacity: 1;
  transform: none;
}
[data-stagger].is-revealed > *:nth-child(1) { transition-delay: 0.04s; }
[data-stagger].is-revealed > *:nth-child(2) { transition-delay: 0.12s; }
[data-stagger].is-revealed > *:nth-child(3) { transition-delay: 0.20s; }
[data-stagger].is-revealed > *:nth-child(4) { transition-delay: 0.28s; }
[data-stagger].is-revealed > *:nth-child(5) { transition-delay: 0.36s; }
[data-stagger].is-revealed > *:nth-child(6) { transition-delay: 0.44s; }
[data-stagger].is-revealed > *:nth-child(7) { transition-delay: 0.52s; }
[data-stagger].is-revealed > *:nth-child(8) { transition-delay: 0.60s; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal], [data-stagger] > * { opacity: 1 !important; transform: none !important; clip-path: none !important; }
}

/* ---- Keyframes ---- */
@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-50% - var(--sp-7) / 2)); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0) rotate(0); }
  50%      { transform: translateY(-20px) rotate(3deg); }
}

@keyframes spinSlow { to { transform: rotate(360deg); } }

@keyframes pulseRing {
  0% { transform: scale(0.9); opacity: 0.7; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { opacity: 0; }
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

@keyframes shimmer {
  to { background-position: 200% center; }
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes drawLine {
  from { stroke-dashoffset: var(--len, 1000); }
  to   { stroke-dashoffset: 0; }
}

/* ---- Classes d'animation ---- */
.anim-float { animation: float 6s var(--ease-in-out) infinite; }
.anim-float-slow { animation: floatSlow 9s var(--ease-in-out) infinite; }
.anim-spin-slow { animation: spinSlow 40s linear infinite; }

.hero-in { opacity: 0; animation: slideUpFade 0.9s var(--ease-out) forwards; }
.hero-in--1 { animation-delay: 0.1s; }
.hero-in--2 { animation-delay: 0.25s; }
.hero-in--3 { animation-delay: 0.4s; }
.hero-in--4 { animation-delay: 0.55s; }
.hero-in--5 { animation-delay: 0.7s; }

/* Indicateur de scroll */
.scroll-cue { display: inline-flex; flex-direction: column; align-items: center; gap: 6px; }
.scroll-cue__line {
  width: 1.6px; height: 42px;
  background: linear-gradient(to bottom, currentColor 40%, transparent);
  position: relative; overflow: hidden;
}
.scroll-cue__line::after {
  content: ""; position: absolute; top: -50%; left: 0; width: 100%; height: 50%;
  background: currentColor;
  animation: scrollDot 1.8s var(--ease-in-out) infinite;
}
@keyframes scrollDot { to { top: 100%; } }

@media (prefers-reduced-motion: reduce) {
  .anim-float, .anim-float-slow, .anim-spin-slow, .scroll-cue__line::after, .marquee__track { animation: none; }
  .hero-in { opacity: 1; animation: none; }
}