/* ============================================================
   LANDING PAGE FR – STYLE COSMIC++ (Dark + Light Argentique Hybride)
   ============================================================ */

/* ------------------------------ */
/* VARIABLES (Dark / Light)       */
/* ------------------------------ */

:root {
  /* Mode Dark COSMIC */
  --bg-dark: #000;
  --text-dark: #fff;
  --mesh-dark-1: rgba(255, 255, 255, 0.06);
  --mesh-dark-2: rgba(0, 0, 0, 0.9);

  /* Mode Light COSMIC Argentique Hybride */
  --bg-light: linear-gradient(180deg, #ffffff, #f7f7f7, #f3f0eb);
  --text-light: #111;
  --mesh-light-1: rgba(255, 255, 255, 0.9);
  --mesh-light-2: rgba(230, 230, 230, 0.6);

  /* Couleurs COSMIC */
  --gold: #f5d68a;
  --gold-dark: #c89b3c;
  --silver: #d9d9d9;
  --silver-strong: #bfbfbf;

  /* Transitions */
  --transition-fast: 0.25s ease;
  --transition-medium: 0.45s ease;
  --transition-slow: 0.8s ease;
}

/* Mode Light */
body.mode-light {
  background: var(--bg-light);
  color: var(--text-light);
}

/* Mode Dark */
body.mode-dark {
  background: var(--bg-dark);
  color: var(--text-dark);
}

/* ============================================================
   FOND NEURAL COSMIC
   ============================================================ */

#voralyn-neural {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.35;
  pointer-events: none;
  z-index: -2;
  transition: opacity var(--transition-medium);
}

body.mode-light #voralyn-neural {
  opacity: 0.18;
}

/* ============================================================
   MESH PREMIUM (Dark / Light)
   ============================================================ */

.mesh-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  transition: opacity var(--transition-medium), background var(--transition-medium);
}

/* Mode Dark */
body.mode-dark .mesh-overlay {
  background: radial-gradient(circle at 50% 20%, var(--mesh-dark-1), var(--mesh-dark-2)),
              radial-gradient(circle at 80% 80%, rgba(255,255,255,0.04), rgba(0,0,0,1));
}

/* Mode Light Argentique Hybride */
body.mode-light .mesh-overlay {
  background: radial-gradient(circle at 50% 20%, var(--mesh-light-1), var(--mesh-light-2)),
              radial-gradient(circle at 80% 80%, rgba(255,255,255,0.8), rgba(240,240,240,0.6));
}

/* ============================================================
   HEADER
   ============================================================ */

.lp-header {
  width: 100%;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background var(--transition-medium), border var(--transition-medium);
}

body.mode-light .lp-header {
  background: rgba(255, 255, 255, 0.55);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.lp-logo {
  height: 42px;
  filter: drop-shadow(0 0 6px rgba(255, 215, 160, 0.25));
  animation: logoPulseLP 14s ease-in-out infinite;
}

.lp-nav {
  display: flex;
  gap: 28px;
}

.lp-nav a {
  text-decoration: none;
  font-size: 15px;
  opacity: 0.85;
  transition: var(--transition-fast);
}

body.mode-dark .lp-nav a {
  color: white;
}

body.mode-light .lp-nav a {
  color: #111;
}

.lp-nav a:hover {
  opacity: 1;
  transform: translateY(-1px);
}

/* CTA header */
.cta-btn {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #000;
  border-radius: 6px;
  font-weight: 600;
}

/* ============================================================
   TOGGLE DARK/LIGHT COSMIC
   ============================================================ */

.theme-toggle,
.theme-toggle-floating {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 20px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(6px);
  transition: var(--transition-medium);
}

.theme-toggle:hover,
.theme-toggle-floating:hover {
  transform: translateY(-2px);
}

/* Floating mobile */
.theme-toggle-floating {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 40;
  display: none;
}

@media (max-width: 768px) {
  .theme-toggle-floating {
    display: flex;
  }
  .lp-nav {
    display: none;
  }
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding-top: 180px;
  text-align: center;
  max-width: 900px;
  margin: auto;
  transition: var(--transition-medium);
}

.hero h1 {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: 2px;
}

.hero h2 {
  font-size: 26px;
  font-weight: 300;
  opacity: 0.85;
}

.hero p {
  font-size: 18px;
  opacity: 0.75;
}

.hero-cta {
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #000;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.hero-cta:hover {
  transform: translateY(-2px);
}

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
  max-width: 900px;
  margin: 120px auto;
  padding: 0 20px;
  text-align: center;
}

.section h3 {
  font-size: 32px;
  margin-bottom: 20px;
}

.section p {
  font-size: 18px;
  opacity: 0.75;
  line-height: 1.6;
}

/* ============================================================
   VALEURS / ADN COSMIC
   ============================================================ */

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.value {
  padding: 20px;
  border-radius: 12px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition-medium);
}

body.mode-light .value {
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.6);
}

.value:hover {
  transform: translateY(-4px);
}

/* ============================================================
   FONCTIONNALITÉS
   ============================================================ */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.feature {
  padding: 20px;
  border-radius: 12px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition-medium);
}

body.mode-light .feature {
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.6);
}

.feature:hover {
  transform: translateY(-4px);
}

/* ============================================================
   ROADMAP COSMIC
   ============================================================ */

.roadmap {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-top: 40px;
}

.roadmap-item {
  position: relative;
  padding-left: 60px;
  text-align: left;
}

.roadmap-item .step {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 26px;
  font-weight: 700;
  color: var(--gold);
}

/* ============================================================
   SECURITY & GOVERNANCE
   ============================================================ */

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.security-item {
  padding: 20px;
  border-radius: 12px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.08);
  transition: 0.35s ease;
}

body.mode-light .security-item {
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.6);
}

.security-item:hover {
  transform: translateY(-4px);
}

/* ============================================================
   CTA FINAL
   ============================================================ */

.cta-final {
  text-align: center;
  margin: 140px 0;
}

.cta-btn-large {
  padding: 16px 34px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #000;
  border-radius: 10px;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-fast);
}

.cta-btn-large:hover {
  transform: translateY(-3px);
}

/* ============================================================
   ANIMATIONS COSMIC
   ============================================================ */

@keyframes logoPulseLP {
  0% { filter: drop-shadow(0 0 6px rgba(255,215,160,0.25)); }
  50% { filter: drop-shadow(0 0 12px rgba(255,215,160,0.45)); }
  100% { filter: drop-shadow(0 0 6px rgba(255,215,160,0.25)); }
}

/* Scroll reveal */
.scroll-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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