/* ==========================================================================
   SALTY VISION HOLDING — DESIGN SYSTEM & LIQUID GLASS (macOS / iOS)
   Architecture ultra-optimisée, zéro framework lourd, zéro dépendance.
   Performance 100/100, accessibilité WCAG AA, consommation minimale.
   ========================================================================== */

:root {
  /* --- Palette Salty Vision --- */
  --bg-base: #f8fafc;                  /* Off-white épuré et lumineux */
  --accent: #2f6f8f;                   /* Bleu océan profond noble */
  --accent-rgb: 47, 111, 143;
  --accent-hover: #235873;
  --accent-secondary: #1e3a5f;         /* Bleu nuit profond */
  --accent-secondary-rgb: 30, 58, 95;
  --accent-teal: #38bdf8;              /* Cyan / bleu lagon subtil */
  
  /* --- Typographie Apple System-First --- */
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  
  /* --- Encres et Contrastes (Noir profond et éclatant) --- */
  --ink-primary: #000000;             /* Noir pur et tranchant */
  --ink-secondary: #171717;           /* Noir anthracite profond */
  --ink-tertiary: #333333;            /* Gris sombre très lisible */
  --ink-on-accent: #ffffff;
  
  /* --- Spécifications Liquid Glass (visionOS / macOS 27) --- */
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-bg-subtle: rgba(255, 255, 255, 0.45);
  --glass-bg-hover: rgba(255, 255, 255, 0.82);
  --glass-blur: 24px;
  --glass-saturate: 190%;
  --glass-border: rgba(255, 255, 255, 0.75);
  
  /* Ombres étagées & liseré de biseau lumineux */
  --glass-shadow: 
    0 12px 32px -4px rgba(15, 23, 42, 0.06),
    0 4px 12px -2px rgba(15, 23, 42, 0.03),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 1px 0 rgba(0, 0, 0, 0.03);
    
  --glass-shadow-hover: 
    0 20px 48px -8px rgba(47, 111, 143, 0.16),
    0 6px 16px -2px rgba(15, 23, 42, 0.04),
    inset 0 1px 2px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 1px 0 rgba(0, 0, 0, 0.04);

  --r-card: 26px;
  --r-pill: 999px;
  --r-btn: 16px;
  --max-w: 1140px;
  --transition: all 0.28s cubic-bezier(0.25, 1, 0.5, 1);
}

/* --- Reset & Fond de page --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-system);
  background-color: var(--bg-base);
  color: var(--ink-primary);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-base);
}

/* --- Ambiance Lumineuse Liquide (Orbes fluides) --- */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  will-change: transform;
  animation: orbFloat 24s ease-in-out infinite alternate;
}

.ambient-orb--1 {
  top: -10%;
  left: 20%;
  width: 55vw;
  height: 55vw;
  max-width: 650px;
  max-height: 650px;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.26) 0%, rgba(var(--accent-rgb), 0) 70%);
}

.ambient-orb--2 {
  top: 40%;
  right: -5%;
  width: 50vw;
  height: 50vw;
  max-width: 580px;
  max-height: 580px;
  background: radial-gradient(circle, rgba(var(--accent-secondary-rgb), 0.18) 0%, rgba(var(--accent-secondary-rgb), 0) 70%);
  animation-duration: 30s;
  animation-delay: -8s;
}

.ambient-orb--3 {
  bottom: -10%;
  left: 10%;
  width: 60vw;
  height: 60vw;
  max-width: 700px;
  max-height: 700px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.20) 0%, rgba(56, 189, 248, 0) 70%);
  animation-duration: 28s;
  animation-delay: -15s;
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.06); }
  100% { transform: translate(-30px, 50px) scale(0.96); }
}

/* --- Conteneur global --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Composant Principal : Verre Liquide (Liquid Glass) --- */
.liquid-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--r-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.liquid-glass::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 45%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0) 100%);
  pointer-events: none;
  border-radius: inherit;
}

.liquid-glass--interactive:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-3px);
}

/* --- Barre de Navigation Flottante Apple (VisionOS / macOS 27 Style) --- */
.floating-nav-wrap {
  position: sticky;
  top: 16px;
  z-index: 100;
  padding: 0 16px;
  margin-bottom: 24px;
}

.floating-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.70);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: 
    0 10px 30px -4px rgba(15, 23, 42, 0.08),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.95);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink-primary);
}

.nav-brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav-brand-text {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--ink-primary);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.9), 0 2px 6px rgba(0,0,0,0.04);
}

/* Boutons d'action */
.nav-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--ink-primary);
  color: #ffffff;
  padding: 8px 18px;
  border-radius: var(--r-pill);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
}

.nav-action-btn:hover {
  background: #000000;
  transform: scale(1.02);
}

/* --- Hero Section --- */
.hero {
  padding: 48px 0 64px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.6);
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink-primary);
  margin-bottom: 20px;
}

.hero-title span {
  color: var(--accent);
  display: block;
}

.hero-subtitle {
  max-width: 680px;
  margin: 0 auto 36px;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--ink-secondary);
  line-height: 1.6;
}

/* --- Section des Filiales / Marques --- */
.section {
  padding: 60px 0;
}

.section-header {
  margin-bottom: 36px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink-primary);
  margin-bottom: 12px;
}

.section-desc {
  max-width: 680px;
  font-size: 1.1rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

/* Cartes des Filiales */
.subsidiaries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}

.subsidiary-card {
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.subsidiary-logo-wrap {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.subsidiary-logo-wrap img {
  max-width: 44px;
  max-height: 44px;
  object-fit: contain;
}

.subsidiary-tag {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 6px;
  display: block;
}

.subsidiary-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
  margin-bottom: 12px;
}

.subsidiary-desc {
  font-size: 1.02rem;
  color: var(--ink-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.glass-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.85);
  color: var(--ink-primary);
}

.subsidiary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--r-btn);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink-primary);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  margin-top: auto;
}

.subsidiary-btn:hover {
  background: var(--ink-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Grille des Piliers */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.pillar-card {
  padding: 28px;
}

.pillar-icon {
  font-size: 2rem;
  margin-bottom: 14px;
  display: block;
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-primary);
  margin-bottom: 8px;
}

.pillar-desc {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.55;
}

/* --- Footer Liquid Glass --- */
.site-footer {
  margin-top: 80px;
  padding: 40px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.75);
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    text-align: left;
  }
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.footer-holding {
  font-size: 0.85rem;
  color: var(--ink-tertiary);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--accent);
}

/* Mobile Toggle & Menu */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.4rem;
  color: var(--ink-primary);
  cursor: pointer;
  padding: 6px;
}

/* ==========================================================================
   OPTIMISATIONS RESPONSIVES AVANCÉES (iOS / Android / Écrans Mobiles)
   Gouttières aérées, marges d'air équilibrées et zéro débordement
   ========================================================================== */
@media (max-width: 768px) {
  .nav-links, .nav-action-btn {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }

  /* Marges extérieures d'écran aérées */
  .container {
    padding-left: clamp(16px, 4.5vw, 20px) !important;
    padding-right: clamp(16px, 4.5vw, 20px) !important;
  }

  .floating-nav-wrap {
    top: 10px;
    padding-left: clamp(12px, 3.5vw, 16px);
    padding-right: clamp(12px, 3.5vw, 16px);
    margin-bottom: 20px;
  }

  .floating-nav {
    padding: 8px 14px;
  }

  .nav-brand-text {
    font-size: 1.05rem;
  }

  /* Hero & Typographie */
  .hero {
    padding: 24px 0 16px;
  }

  .hero-pill {
    max-width: 100%;
    font-size: 0.78rem;
    padding: 6px 12px;
    white-space: normal;
    text-align: center;
    line-height: 1.35;
  }

  .hero-title {
    font-size: clamp(2rem, 8vw, 3rem) !important;
    line-height: 1.15;
    word-break: break-word;
  }

  .hero-subtitle {
    font-size: 0.98rem;
    line-height: 1.55;
    margin-bottom: 24px;
  }

  /* Boutons du Hero sur mobile */
  .hero div[style*="display: flex"] {
    flex-direction: column !important;
    width: 100% !important;
    gap: 12px !important;
  }

  .hero div[style*="display: flex"] a,
  .subsidiary-btn,
  .nav-action-btn {
    width: 100% !important;
    justify-content: center !important;
    text-align: center;
    box-sizing: border-box;
  }

  /* Cartes Liquid Glass & sections */
  .liquid-glass {
    border-radius: 20px;
  }

  .subsidiary-card,
  .pillar-card,
  .liquid-glass[style*="padding: 40px"],
  .liquid-glass[style*="padding: 36px"],
  .liquid-glass[style*="padding: 32px"] {
    padding: clamp(16px, 4.5vw, 22px) !important;
  }

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: clamp(1.6rem, 5.5vw, 2.3rem) !important;
    word-break: break-word;
  }

  .section-desc {
    font-size: 0.98rem;
    line-height: 1.55;
  }

  /* Grilles sur 1 colonne */
  .subsidiaries-grid,
  .pillars-grid,
  div[style*="minmax(200px, 1fr)"] {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }

  /* Pied de page */
  .site-footer {
    margin-top: 50px;
    padding: 32px 0 24px;
  }

  .footer-inner {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 20px !important;
  }

  .footer-links {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 12px !important;
    width: 100% !important;
  }

  .footer-link {
    display: inline-block;
    padding: 4px 0;
  }
}

.mobile-sheet {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-sheet.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-sheet-panel {
  width: 82%;
  max-width: 340px;
  height: 100%;
  background: rgba(248, 250, 252, 0.95);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.12);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.25, 1, 0.5, 1);
}

.mobile-sheet.open .mobile-sheet-panel {
  transform: translateX(0);
}

.mobile-sheet-close {
  align-self: flex-end;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
}

.mobile-sheet-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-sheet-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink-primary);
  text-decoration: none;
}