site-mva-global-fret/css/parallax.css

/* =========================================================================
   PARALLAX INTRO — MVA Global Fret
   Page unique, fixe (pas de scroll). Vidéo Terre depuis l'espace + ligne rouge
   Paris↔Antananarivo + bouton centré. Bouge à la souris.
   ========================================================================= */

: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%;
  overflow: hidden;
}

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

/* ── 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: 50;
}

.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); }

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

.layer {
  position: absolute;
  inset: -10% -10%;
  pointer-events: none;
  will-change: transform;
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 1 — VIDÉO Terre depuis l'espace (Pexels 854275, libre)
   Bouge le PLUS à la souris (effet de profondeur).
   ────────────────────────────────────────────────────────────────────────── */
.layer-video {
  width: 120%;
  height: 120%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.85) saturate(1.1) hue-rotate(-10deg);
  transform: translate(calc(var(--mx) * -45px), calc(var(--my) * -45px)) scale(1.05);
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 2 — Voile bleu nuit (palette MVA)
   ────────────────────────────────────────────────────────────────────────── */
.layer-tint {
  background:
    radial-gradient(ellipse at center, rgba(20, 20, 50, 0.35) 0%, rgba(5, 5, 24, 0.85) 100%),
    linear-gradient(180deg, rgba(10, 10, 30, 0.55) 0%, rgba(5, 5, 24, 0.7) 100%);
  inset: 0;
}

/* ──────────────────────────────────────────────────────────────────────────
   COUCHE 4 — Route Paris ↔ Antananarivo (ligne rouge fine)
   Bouge légèrement (entre vidéo et bouton), donne une 3ème profondeur.
   ────────────────────────────────────────────────────────────────────────── */
.layer-route {
  inset: 0;
  transform: translate(calc(var(--mx) * -12px), calc(var(--my) * -12px));
}
.layer-route svg { width: 100%; height: 100%; display: block; }

/* ──────────────────────────────────────────────────────────────────────────
   BOUTON CTA centré — "Accéder au site"
   Bouge en sens INVERSE des couches → effet de tilt.
   ────────────────────────────────────────────────────────────────────────── */
.cta-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 10;
  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);
  /* Bouge légèrement en sens opposé des couches arrière (effet 3D) */
  transform: translate(
    calc(-50% + var(--mx) * 8px),
    calc(-50% + var(--my) * 8px)
  );
}

.cta-btn:hover {
  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);
}

/* Effet shine au hover */
.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); }

/* Pulse continu autour du bouton */
.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;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cta-btn::after { animation: none; }
  .layer-video, .layer-route, .cta-btn { transition: none; }
}