/* =========================================================================
   PARALLAX INTRO — MVA Global Fret
   Page unique fixe. Parallaxe pilotée à la souris uniquement.
   Photos professionnelles Unsplash, aucun dessin maison.
   ========================================================================= */

:root {
  --navy: #1a1a3e;
  --navy-deep: #050518;
  --navy-light: #2a2a5e;
  --gold: #c5a55a;
  --gold-light: #e0c98a;
  --white: #ffffff;
  --mx: 0;
  --my: 0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
}

.parallax-body {
  font-family: 'Inter', sans-serif;
  color: var(--white);
  background: var(--navy-deep);
}

/* ── HEADER MINIMAL ─────────────────────────────────────────────────────── */
.parallax-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 36px;
  z-index: 50;
}

.parallax-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  letter-spacing: 1px;
  font-size: 0.95rem;
  text-transform: uppercase;
  user-select: none;
}
.parallax-logo img {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.5));
}

.lang-switcher {
  display: inline-flex;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 50px;
  padding: 4px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.lang-switcher button {
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.7);
  padding: 6px 14px;
  cursor: pointer;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.78rem;
  font-family: inherit;
  transition: all 0.2s;
}
.lang-switcher button.active {
  background: var(--gold);
  color: var(--navy);
}
.lang-switcher button:hover:not(.active) { color: var(--white); }

/* ── STAGE ──────────────────────────────────────────────────────────────── */
.stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  perspective: 1000px;
}

.layer {
  position: absolute;
  inset: -8% -8%;            /* Marge pour que la parallaxe ne révèle pas les bords */
  pointer-events: none;
  will-change: transform;
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 1 — Terre depuis l'espace (background le plus profond)
   Photo : NASA / Unsplash @nasa
   ────────────────────────────────────────────────────────────────────────── */
.layer-earth {
  background-image: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?w=2400&q=85');
  background-size: cover;
  background-position: center;
  /* Bouge légèrement à la souris */
  transform: translate(calc(var(--mx) * -18px), calc(var(--my) * -18px)) scale(1.04);
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 2 — Voile bleu nuit pour assombrir et amener la palette de marque
   ────────────────────────────────────────────────────────────────────────── */
.layer-tint {
  background:
    radial-gradient(ellipse at center, rgba(26, 26, 62, 0.4) 0%, rgba(5, 5, 24, 0.85) 100%),
    linear-gradient(180deg, rgba(26, 26, 62, 0.5) 0%, rgba(5, 5, 24, 0.7) 100%);
  inset: 0;
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 3 — Nuages au coucher de soleil (vue aérienne)
   Mode soft-light pour fusionner avec la Terre
   Photo : Unsplash
   ────────────────────────────────────────────────────────────────────────── */
.layer-clouds {
  background-image: url('https://images.unsplash.com/photo-1530908295418-a12e326966ba?w=2400&q=85');
  background-size: cover;
  background-position: center;
  opacity: 0.28;
  mix-blend-mode: soft-light;
  transform: translate(calc(var(--mx) * -32px), calc(var(--my) * -32px)) scale(1.06);
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 4 — Halo doré central qui suit la souris
   ────────────────────────────────────────────────────────────────────────── */
.layer-glow {
  background: radial-gradient(circle at calc(50% + var(--mx) * 8%) calc(50% + var(--my) * 8%),
    rgba(197, 165, 90, 0.22) 0%,
    rgba(197, 165, 90, 0.10) 25%,
    transparent 55%);
  inset: 0;
  mix-blend-mode: screen;
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 5 — Particules dorées flottantes (parallaxe la plus rapide)
   ────────────────────────────────────────────────────────────────────────── */
.layer-particles {
  inset: 0;
  transform: translate(calc(var(--mx) * -55px), calc(var(--my) * -55px));
}
.particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0%, var(--gold) 50%, transparent 100%);
  pointer-events: none;
  filter: blur(0.5px);
  animation: float 14s ease-in-out infinite;
}
.particle::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(197, 165, 90, 0.5) 0%, transparent 70%);
  filter: blur(4px);
}
.p1  { top: 12%; left: 8%;  width: 4px; height: 4px; animation-delay: 0s;     animation-duration: 12s; }
.p2  { top: 22%; left: 78%; width: 3px; height: 3px; animation-delay: -2s;    animation-duration: 16s; }
.p3  { top: 35%; left: 18%; width: 5px; height: 5px; animation-delay: -5s;    animation-duration: 14s; }
.p4  { top: 48%; left: 88%; width: 2px; height: 2px; animation-delay: -8s;    animation-duration: 18s; }
.p5  { top: 60%; left: 14%; width: 4px; height: 4px; animation-delay: -3s;    animation-duration: 13s; }
.p6  { top: 72%; left: 72%; width: 3px; height: 3px; animation-delay: -6s;    animation-duration: 17s; }
.p7  { top: 82%; left: 30%; width: 5px; height: 5px; animation-delay: -1s;    animation-duration: 15s; }
.p8  { top: 18%; left: 48%; width: 2px; height: 2px; animation-delay: -7s;    animation-duration: 19s; }
.p9  { top: 40%; left: 56%; width: 3px; height: 3px; animation-delay: -4s;    animation-duration: 14s; }
.p10 { top: 88%; left: 92%; width: 4px; height: 4px; animation-delay: -9s;    animation-duration: 16s; }
.p11 { top: 6%;  left: 35%; width: 3px; height: 3px; animation-delay: -10s;   animation-duration: 13s; }
.p12 { top: 92%; left: 56%; width: 2px; height: 2px; animation-delay: -11s;   animation-duration: 17s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0); opacity: 0.4; }
  25%      { transform: translate(20px, -30px); opacity: 1; }
  50%      { transform: translate(-15px, -50px); opacity: 0.6; }
  75%      { transform: translate(-25px, -20px); opacity: 1; }
}

/* ──────────────────────────────────────────────────────────────────────────
   CARTE CENTRALE — CTA
   ────────────────────────────────────────────────────────────────────────── */
.center-card {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 10;
  text-align: center;
  width: min(560px, calc(100vw - 40px));
  padding: 50px 50px 44px;
  background: rgba(13, 13, 36, 0.45);
  border: 1px solid rgba(197, 165, 90, 0.25);
  border-radius: 28px;
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  /* La carte bouge en sens INVERSE des autres couches (effet de tilt 3D) */
  transform: translate(
    calc(-50% + var(--mx) * 12px),
    calc(-50% + var(--my) * 12px)
  );
  transition: transform 0.05s linear;
}

/* Halo doré derrière la carte */
.center-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(197, 165, 90, 0.6), transparent 40%, transparent 60%, rgba(197, 165, 90, 0.4));
  z-index: -1;
  opacity: 0.5;
  filter: blur(8px);
}

.card-pretitle {
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  letter-spacing: 8px;
  text-transform: uppercase;
  color: var(--gold);
  font-size: 0.78rem;
  margin-bottom: 14px;
  opacity: 0.92;
}

.card-title {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
  background: linear-gradient(135deg, #fff 0%, #c5a55a 55%, #fff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.card-line {
  width: 64px;
  height: 2px;
  background: var(--gold);
  margin: 22px auto 18px;
  border-radius: 1px;
  position: relative;
}
.card-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold);
  filter: blur(4px);
  opacity: 0.6;
}

.card-subtitle {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.55;
  letter-spacing: 0.3px;
  max-width: 420px;
  margin: 0 auto 36px;
}

/* ── BOUTON CTA ─────────────────────────────────────────────────────────── */
.cta-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 44px;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 50%, var(--gold) 100%);
  color: var(--navy);
  text-decoration: none;
  border-radius: 50px;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.5px;
  overflow: hidden;
  box-shadow:
    0 14px 40px rgba(197, 165, 90, 0.5),
    0 0 0 0 rgba(197, 165, 90, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: all 0.32s cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 1;
}
.cta-btn-shine {
  position: absolute;
  top: 0; left: -120%;
  width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
  transform: skewX(-20deg);
  transition: left 0.7s ease;
}
.cta-btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow:
    0 22px 55px rgba(197, 165, 90, 0.65),
    0 0 0 10px rgba(197, 165, 90, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.cta-btn:hover .cta-btn-shine { left: 130%; }
.cta-btn i {
  font-size: 0.95rem;
  transition: transform 0.32s ease;
}
.cta-btn:hover i { transform: translateX(6px); }

/* Pulse autour du bouton (continu) */
.cta-btn::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50px;
  border: 2px solid rgba(197, 165, 90, 0.5);
  animation: ctaPulse 2.5s ease-out infinite;
  pointer-events: none;
}
@keyframes ctaPulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.18); opacity: 0; }
}

/* ── META INFOS SOUS LE BOUTON ──────────────────────────────────────────── */
.card-meta {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.82rem;
}
.card-meta span { display: inline-flex; align-items: center; gap: 8px; }
.card-meta i { color: var(--gold); font-size: 0.85rem; }
.meta-sep { color: rgba(197, 165, 90, 0.4); padding: 0 4px; }

/* ── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .parallax-header { padding: 14px 18px; }
  .parallax-logo span { display: none; }
  .parallax-logo img { height: 40px; }
  .lang-switcher button { padding: 5px 10px; font-size: 0.74rem; }

  .center-card {
    width: calc(100vw - 28px);
    padding: 36px 28px 32px;
    border-radius: 22px;
  }
  .card-pretitle { letter-spacing: 5px; font-size: 0.72rem; }
  .card-subtitle { font-size: 0.92rem; margin-bottom: 28px; }
  .cta-btn { padding: 14px 30px; font-size: 0.95rem; }

  .card-meta { gap: 10px; font-size: 0.76rem; }
  .meta-sep { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .particle, .cta-btn::after { animation: none; }
  .layer-earth, .layer-clouds, .layer-particles, .center-card { transition: none; }
}