/* =========================================================
   ANIMATIONS — keyframes + système de révélation au scroll
   ========================================================= */

/* ---------- Keyframes ---------- */
@keyframes drift-a {
  0%,100% { transform: translate3d(0,0,0) scale(1); }
  33%     { transform: translate3d(14vw, 8vh, 0) scale(1.18); }
  66%     { transform: translate3d(4vw, 20vh, 0) scale(.92); }
}
@keyframes drift-b {
  0%,100% { transform: translate3d(0,0,0) scale(1); }
  50%     { transform: translate3d(-16vw,-12vh,0) scale(1.22); }
}
@keyframes drift-c {
  0%,100% { transform: translate3d(0,0,0) rotate(0deg); }
  50%     { transform: translate3d(-10vw, 10vh, 0) rotate(180deg); }
}

@keyframes float-y {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-16px); }
}
@keyframes float-y-sm {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-8px); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-rev { to { transform: rotate(-360deg); } }

@keyframes pulse-ring {
  0%   { transform: scale(.85); opacity: .8; }
  70%  { transform: scale(1.5);  opacity: 0; }
  100% { transform: scale(1.5);  opacity: 0; }
}

@keyframes shimmer {
  0%   { background-position: -160% 0; }
  100% { background-position: 260% 0; }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@keyframes marquee-rtl {
  from { transform: translateX(-50%); }
  to   { transform: translateX(0); }
}

@keyframes blob-morph {
  0%,100% { border-radius: 62% 38% 42% 58% / 54% 46% 54% 46%; }
  25%     { border-radius: 42% 58% 62% 38% / 42% 62% 38% 58%; }
  50%     { border-radius: 55% 45% 35% 65% / 62% 38% 62% 38%; }
  75%     { border-radius: 38% 62% 55% 45% / 45% 55% 45% 55%; }
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: none; }
}

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

@keyframes pop-in {
  0%   { opacity: 0; transform: scale(.82); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes caret { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

@keyframes dash-draw { to { stroke-dashoffset: 0; } }

@keyframes bob-arrow {
  0%,100% { transform: translateY(0); opacity: .55; }
  50%     { transform: translateY(9px); opacity: 1; }
}

@keyframes gradient-pan {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes shake {
  10%,90% { transform: translateX(-2px); }
  20%,80% { transform: translateX(4px); }
  30%,50%,70% { transform: translateX(-6px); }
  40%,60% { transform: translateX(6px); }
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(24px) scale(.96); }
  to   { opacity: 1; transform: none; }
}

@keyframes sheen-sweep {
  0%   { transform: translateX(-120%) skewX(-18deg); }
  100% { transform: translateX(320%) skewX(-18deg); }
}

/* ---------- Classes d'animation en boucle ---------- */
.anim-float      { animation: float-y 6s var(--ease-io) infinite; }
.anim-float-sm   { animation: float-y-sm 4.5s var(--ease-io) infinite; }
.anim-spin-slow  { animation: spin 22s linear infinite; }
.anim-spin-rev   { animation: spin-rev 30s linear infinite; }
.anim-blob       { animation: blob-morph 16s var(--ease-io) infinite; }
.delay-1 { animation-delay: .4s; }
.delay-2 { animation-delay: .8s; }
.delay-3 { animation-delay: 1.2s; }

/* ---------- Révélation au scroll ---------- */
[data-reveal] {
  opacity: 0;
  will-change: transform, opacity;
  transition:
    opacity .85s var(--ease) var(--reveal-delay, 0s),
    transform .85s var(--ease) var(--reveal-delay, 0s),
    filter .85s var(--ease) var(--reveal-delay, 0s);
}
[data-reveal="up"]    { transform: translateY(44px); }
[data-reveal="down"]  { transform: translateY(-40px); }
[data-reveal="left"]  { transform: translateX(-56px); }
[data-reveal="right"] { transform: translateX(56px); }
[data-reveal="scale"] { transform: scale(.88); }
[data-reveal="blur"]  { filter: blur(14px); transform: translateY(26px); }
[data-reveal="flip"]  { transform: perspective(900px) rotateX(-28deg); transform-origin: top center; }
[data-reveal="zoom-rot"] { transform: scale(.8) rotate(-6deg); }

[data-reveal].is-in {
  opacity: 1;
  filter: blur(0);
  transform: none;
}

/* ---------- Titre lettre par lettre (split text) ---------- */
.split-line { display: block; overflow: hidden; }
.split-word {
  display: inline-block;
  transform: translateY(110%) rotate(6deg);
  opacity: 0;
  transition: transform .95s var(--ease), opacity .95s var(--ease);
}
.split-ready .split-word { transform: none; opacity: 1; }

.split-char {
  display: inline-block;
  opacity: 0;
  transform: translateY(60%) scale(.9);
  transition: transform .7s var(--ease-back), opacity .5s linear;
}
.split-ready .split-char { opacity: 1; transform: none; }

/* ---------- Ligne animée sous les titres ---------- */
.underline-grow {
  position: relative;
  display: inline-block;
}
.underline-grow::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  height: 3px; width: 0;
  border-radius: 3px;
  background: var(--grad-brand);
  transition: width 1.1s var(--ease) .25s;
}
.is-in .underline-grow::after,
.underline-grow.is-in::after { width: 100%; }

/* ---------- Effet "sheen" au survol ---------- */
.sheen { position: relative; overflow: hidden; }
.sheen::after {
  content: "";
  position: absolute; top: 0; left: 0;
  width: 45%; height: 100%;
  background: var(--grad-sheen);
  opacity: 0;
  pointer-events: none;
}
.sheen:hover::after {
  opacity: 1;
  animation: sheen-sweep 1.1s var(--ease-io);
}

/* ---------- Compteurs ---------- */
.counter { font-variant-numeric: tabular-nums; }

/* ---------- Transition de page ---------- */
.page-veil {
  position: fixed; inset: 0;
  z-index: 9000;
  background: var(--bg);
  transform: scaleY(0);
  transform-origin: bottom;
  pointer-events: none;
  transition: transform .6s var(--ease-io);
}
body.is-leaving .page-veil {
  transform: scaleY(1);
  transform-origin: bottom;
}

/* ---------- Apparition d'entrée de page ---------- */
.page-enter { animation: fade-in .7s var(--ease) both; }