/* ============================================================
   COHECO — Motion Layer v1.0
   Mouvement subtil, organique, cohérent avec l'identité
   Respecte prefers-reduced-motion
   ============================================================ */

/* ── Variables de timing ────────────────────────────────────── */
:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-slow: 1.2s;
  --dur-med: 0.7s;
  --dur-fast: 0.3s;
}

/* ── Reveal amélioré — inertie, stagger ─────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.8s var(--ease-out-expo),
    transform 0.8s var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger auto via nth-child sur les conteneurs connus */
.home-cards .home-card:nth-child(1),
.sit-list .sit-item:nth-child(1),
.qi-fragments .qi-fragment:nth-child(1),
.app-trois .app-moment:nth-child(1),
.ref-grid .ref-article:nth-child(1)  { transition-delay: 0s; }

.home-cards .home-card:nth-child(2),
.sit-list .sit-item:nth-child(2),
.qi-fragments .qi-fragment:nth-child(2),
.app-trois .app-moment:nth-child(2),
.ref-grid .ref-article:nth-child(2)  { transition-delay: 0.1s; }

.home-cards .home-card:nth-child(3),
.sit-list .sit-item:nth-child(3),
.qi-fragments .qi-fragment:nth-child(3),
.app-trois .app-moment:nth-child(3),
.ref-grid .ref-article:nth-child(3)  { transition-delay: 0.2s; }

.sit-list .sit-item:nth-child(4),
.qi-fragments .qi-fragment:nth-child(4),
.ref-grid .ref-article:nth-child(4)  { transition-delay: 0.3s; }

.sit-list .sit-item:nth-child(5),
.qi-fragments .qi-fragment:nth-child(5),
.ref-grid .ref-article:nth-child(5)  { transition-delay: 0.38s; }

.sit-list .sit-item:nth-child(6),
.qi-fragments .qi-fragment:nth-child(6),
.ref-grid .ref-article:nth-child(6)  { transition-delay: 0.44s; }

.qi-fragments .qi-fragment:nth-child(7) { transition-delay: 0.5s; }

/* ── Entrée hero — séquence au chargement ───────────────────── */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Home hero */
.home-hero-eyebrow { animation: fadeSlideUp 0.7s var(--ease-out-expo) both 0.05s; }
.home-h1           { animation: fadeSlideUp 0.85s var(--ease-out-expo) both 0.15s; }
.home-hero-desc    { animation: fadeSlideUp 0.75s var(--ease-out-expo) both 0.28s; }
.btn-ghost-white   { animation: fadeSlideUp 0.65s var(--ease-out-expo) both 0.4s; }
.home-signature    { animation: fadeSlideUp 0.8s var(--ease-out-expo) both 0.22s; }
.home-labels       { animation: fadeSlideUp 0.7s var(--ease-out-expo) both 0.38s; }

/* ── Halo respiratoire dans le hero home ────────────────────── */
@keyframes breathe {
  0%, 100% { opacity: 0.045; transform: scale(1) translate(0, 0); }
  33%       { opacity: 0.07;  transform: scale(1.04) translate(-8px, -6px); }
  66%       { opacity: 0.055; transform: scale(0.97) translate(6px, 8px); }
}

@keyframes breathe2 {
  0%, 100% { opacity: 0.03;  transform: scale(1) translate(0, 0); }
  40%       { opacity: 0.055; transform: scale(1.06) translate(10px, -10px); }
  70%       { opacity: 0.04;  transform: scale(0.95) translate(-5px, 5px); }
}

.home-hero {
  position: relative;
  overflow: hidden;
}

.home-hero::before,
.home-hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.home-hero::before {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--terra) 0%, transparent 70%);
  top: -120px;
  right: -80px;
  animation: breathe 9s ease-in-out infinite;
}

.home-hero::after {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, var(--terra) 0%, transparent 70%);
  bottom: -100px;
  left: 20%;
  animation: breathe2 12s ease-in-out infinite;
}

.home-hero > * {
  position: relative;
  z-index: 1;
}

/* ── Mot "jeu" — traitement particulier ─────────────────────── */
.home-signature {
  position: relative;
}

.word-jeu {
  display: inline-block;
  color: var(--terra);
  font-style: italic;
  position: relative;
  transition: letter-spacing 0.4s var(--ease-out-expo);
}

.word-jeu::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--terra);
  transition: width 0.5s var(--ease-out-expo);
  opacity: 0.6;
}

.home-hero:hover .word-jeu {
  letter-spacing: 0.04em;
}

.home-hero:hover .word-jeu::after {
  width: 100%;
}

/* ── Hover cards — micro-lift enrichi ───────────────────────── */
.home-card {
  transition:
    transform 0.4s var(--ease-out-expo),
    box-shadow 0.4s var(--ease-out-expo),
    background 0.3s ease;
  will-change: transform;
}

.home-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(28, 26, 23, 0.09);
}

.home-card-cta {
  transition: gap 0.3s ease, opacity 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.home-card:hover .home-card-cta {
  gap: 0.6rem;
  opacity: 1;
}

/* ── Situations items — hover enrichi ───────────────────────── */
.sit-item {
  transition: padding-left 0.35s var(--ease-out-expo), background 0.25s ease;
}

.sit-item:hover {
  padding-left: 1rem;
  background: rgba(184, 92, 56, 0.025);
}

/* ── Fragments qi — hover couleur + micro-indent ────────────── */
.qi-fragment {
  transition:
    opacity 0.8s var(--ease-out-expo),
    transform 0.8s var(--ease-out-expo),
    padding-left 0.35s var(--ease-out-expo);
}

.qi-fragment:hover {
  padding-left: 3.75rem;
}

.qi-frag-text {
  transition: color 0.3s ease;
}

.qi-fragment:hover .qi-frag-text {
  color: var(--ink);
}

/* ── Nav — underline slide + fade ───────────────────────────── */
.nlinks a {
  transition: opacity 0.2s ease;
}

.nlinks a::after {
  content: '';
  display: block;
  height: 1.5px;
  background: var(--terra);
  width: 0;
  transition: width 0.3s var(--ease-out-expo);
  margin-top: 2px;
}

.nlinks a:hover::after,
.nlinks a.active::after {
  width: 100%;
}

/* ── Ancrages — ligne de connexion au hover ─────────────────── */
.ancrage {
  transition: padding-left 0.3s var(--ease-out-expo), opacity 0.2s;
}

.ancrage:hover {
  padding-left: 0.5rem;
}

.ancrage-dot {
  transition: transform 0.3s var(--ease-out-expo), background 0.2s;
}

.ancrage:hover .ancrage-dot {
  transform: scale(1.6);
}

/* ── Réflexions articles ────────────────────────────────────── */
.ref-article {
  transition:
    padding-left 0.3s var(--ease-out-expo),
    opacity 0.25s ease;
}

.ref-article:hover {
  opacity: 0.72;
  padding-left: 0.75rem;
}

/* ── Boutons terra + ghost — micro-pulse au hover ───────────── */
.btn-terra,
.btn-ghost-white,
.qi-seuil-cta {
  transition:
    background 0.25s ease,
    border-color 0.25s ease,
    transform 0.2s var(--ease-out-expo),
    opacity 0.2s;
}

.btn-terra:hover,
.btn-ghost-white:hover {
  transform: translateY(-1px);
}

.btn-terra:active,
.btn-ghost-white:active {
  transform: translateY(0);
}

/* ── Footer logo — légère oscillation idle ──────────────────── */
@keyframes logoBreath {
  0%, 100% { letter-spacing: -0.02em; }
  50%       { letter-spacing: 0em; }
}

.f-logo {
  animation: logoBreath 8s ease-in-out infinite;
}

/* ── Scroll progress indicator (fine ligne terra en haut) ───── */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--terra);
  z-index: 999;
  transition: width 0.1s linear;
  opacity: 0.7;
}

/* ── Canvas réseau (moment de surprise) ─────────────────────── */
#coheco-network {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.5s ease;
}

#coheco-network.visible {
  opacity: 1;
}

.home-portes {
  position: relative;
  overflow: hidden;
}

/* ── Sections — transition de densité au scroll ─────────────── */
.app-tensions,
.app-presence,
.qi-seuil,
.home-cta {
  transition: opacity 0.6s ease;
}

/* ── Reduced motion — tout désactiver proprement ────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .home-hero::before,
  .home-hero::after {
    display: none;
  }

  #scroll-progress {
    display: none;
  }
}