/* =========================================================================
   PARALLAX INTRO — MVA Global Fret
   Page scrollable (4 viewports) avec scène Three.js fixée. La timeline
   pilote la caméra et l'avion 3D. À 100% du scroll, le bouton CTA apparaît.
   ========================================================================= */

:root {
  --navy: #1a1a3e;
  --navy-deep: #050518;
  --gold: #c5a55a;
  --gold-light: #e0c98a;
  --red: #ff2a3d;
  --white: #fff;
  --mx: 0;
  --my: 0;
}

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

html, body {
  height: 100%;
  background: var(--navy-deep);
}

html { scroll-behavior: smooth; }

body.parallax-body {
  font-family: 'Inter', sans-serif;
  color: var(--white);
  overflow-x: hidden;
}

/* ── HEADER ─────────────────────────────────────────────────────────────── */
.parallax-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 36px;
  z-index: 100;
}

.parallax-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  letter-spacing: 1.2px;
  font-size: 0.92rem;
  text-transform: uppercase;
  user-select: none;
}
.parallax-logo img {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 4px 14px rgba(0, 0, 0, 0.65));
}

.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); }

/* ── SCÈNE FIXE (vidéo + voile + canvas Three.js) ────────────────────────
   .stage-fixed reste plein-écran pendant que la page se déroule derrière.
*/
.stage-fixed {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  z-index: 1;
}

.layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  will-change: transform;
}

.layer-video {
  object-fit: cover;
  object-position: center;
  transform: translate(calc(var(--mx) * -22px), calc(var(--my) * -22px)) scale(1.06);
}

.layer-tint {
  background:
    radial-gradient(ellipse at center, transparent 0%, rgba(5, 5, 24, 0.55) 100%),
    linear-gradient(180deg, rgba(5, 5, 24, 0.25) 0%, rgba(5, 5, 24, 0.5) 100%);
}

.layer-three {
  display: block;
  z-index: 2;
}

/* ── SCROLL STAGE — sentinelles invisibles qui donnent la hauteur ──────── */
.scroll-stage {
  position: relative;
  z-index: 5;
  pointer-events: none;
}
.scroll-stage .act {
  height: 100vh;
}

/* ── ÉTIQUETTES D'ACTE ──────────────────────────────────────────────────── */
.act-label {
  position: absolute;
  left: 50%;
  bottom: 18%;
  transform: translateX(-50%);
  z-index: 30;
  pointer-events: none;
  text-align: center;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-size: 1.05rem;
  color: var(--white);
  text-shadow: 0 4px 18px rgba(0, 0, 0, 0.7);
  opacity: 0;
}
.act-label span {
  display: inline-block;
  padding: 14px 28px;
  background: rgba(5, 5, 24, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  line-height: 1.35;
}

/* ── INDICATEUR SCROLL ─────────────────────────────────────────────────── */
.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%);
  z-index: 40;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
  animation: scrollBob 1.8s ease-in-out infinite;
  transition: opacity 0.5s ease;
}
.scroll-hint.hidden { opacity: 0; pointer-events: none; }
.scroll-hint i { font-size: 1rem; }

@keyframes scrollBob {
  0%, 100% { transform: translate(-50%, 0); }
  50%      { transform: translate(-50%, 8px); }
}

/* ── BOUTON CTA centré ──────────────────────────────────────────────────── */
.cta-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 22px 56px;
  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: 1.1rem;
  letter-spacing: 0.6px;
  overflow: hidden;
  white-space: nowrap;
  box-shadow:
    0 20px 60px rgba(197, 165, 90, 0.55),
    0 0 0 0 rgba(197, 165, 90, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transition: box-shadow 0.32s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform   0.32s cubic-bezier(0.2, 0.8, 0.2, 1);
  /* Caché au départ ; révélé via GSAP en fin de scroll */
  opacity: 0;
  pointer-events: none;
}
.cta-btn.revealed { pointer-events: auto; }

.cta-btn:hover {
  transform: translate(-50%, -50%) scale(1.04);
  box-shadow:
    0 28px 75px rgba(197, 165, 90, 0.7),
    0 0 0 12px rgba(197, 165, 90, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.cta-btn-shine {
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65), transparent);
  transform: skewX(-22deg);
  transition: left 0.7s ease;
  pointer-events: none;
}
.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(8px); }

.cta-btn::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50px;
  border: 2px solid rgba(197, 165, 90, 0.55);
  animation: ctaPulse 2.8s ease-out infinite;
  pointer-events: none;
}
@keyframes ctaPulse {
  0%   { transform: scale(1);    opacity: 0.7; }
  100% { transform: scale(1.18); opacity: 0;   }
}

/* ── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .parallax-header { padding: 14px 18px; }
  .parallax-logo span { display: none; }
  .parallax-logo img { height: 38px; }
  .lang-switcher button { padding: 5px 10px; font-size: 0.74rem; }

  .cta-btn {
    padding: 16px 36px;
    font-size: 0.98rem;
  }
  .act-label { font-size: 0.85rem; bottom: 22%; }
}

@media (prefers-reduced-motion: reduce) {
  .cta-btn::after  { animation: none; }
  .scroll-hint     { animation: none; display: none; }
  .scroll-stage    { display: none; }
  .cta-btn         { opacity: 1; pointer-events: auto; }
  html             { scroll-behavior: auto; }
}