/*
=============================================================================
EXONETIC - DESIGN SYSTÈME FUTURISTE 2025
=============================================================================
Architecture CSS moderne pour entreprise tech/IA
- Mobile-first responsive design
- Neo-glassmorphism avec profondeur 3D  
- Performance optimisée (Core Web Vitals)
- Accessibilité WCAG 2.1 AA
- SEO-friendly structure
=============================================================================
*/

/* ===== IMPORTS & FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ===== VARIABLES CSS SYSTÈME ===== */
:root {
  /* === COULEURS PRINCIPALES === */
  --primary-900: #0F172A;
  --primary-800: #1E293B; 
  --primary-700: #334155;
  --primary-600: #475569;
  --primary-500: #64748B;
  
  --accent-cyan: #06B6D4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.4);
  --accent-magenta: #EC4899;
  --accent-magenta-glow: rgba(236, 72, 153, 0.4);
  --accent-gold: #F59E0B;
  --accent-gold-glow: rgba(245, 158, 11, 0.4);
  
  --text-primary: #F8FAFC;
  --text-secondary: #E2E8F0;
  --text-muted: #94A3B8;
  
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  
  /* === GLASSMORPHISM === */
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.16);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  
  /* === GRADIENTS === */
  --gradient-primary: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-magenta) 100%);
  --gradient-dark: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, var(--accent-cyan-glow) 0%, transparent 70%);
  
  /* === ESPACEMENTS === */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */
  --space-4xl: 6rem;     /* 96px */
  
  /* === RAYONS DE BORDURE === */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* === ANIMATIONS === */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* === BREAKPOINTS === */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
  --bp-2xl: 1536px;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--primary-900);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  min-height: 100vh;
  overflow-x: hidden;
  
  /* Arrière-plan subtil et élégant */
  background-image: 
    radial-gradient(circle at 20% 80%, var(--accent-cyan-glow) 0%, transparent 70%),
    radial-gradient(circle at 80% 20%, var(--accent-magenta-glow) 0%, transparent 70%);
  background-attachment: fixed;
}

/* ===== CONTAINER SYSTÈME ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 640px) {
  .container { padding: 0 var(--space-lg); }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--space-xl); }
}

/* ===== HEADER RÉVOLUTIONNAIRE ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  
  transition: all var(--transition-base);
}

.site-header.scrolled {
  background: rgba(10, 14, 39, 0.95);
  box-shadow: var(--glass-shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  min-height: 72px;
}

/* === LOGO AVEC EFFET NÉON === */
.brand {
  position: relative;
}

.logo-neon {
  height: 48px;
  width: auto;
  filter: drop-shadow(0 0 8px var(--accent-cyan-glow));
  transition: all var(--transition-base);
}

.logo-neon:hover {
  filter: drop-shadow(0 0 12px var(--accent-cyan-glow)) drop-shadow(0 0 24px var(--accent-magenta-glow));
  transform: scale(1.05);
}

/* === NAVIGATION MODERNE === */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav a {
  position: relative;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  overflow: hidden;
}

.nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0.1;
  transition: left var(--transition-base);
  z-index: -1;
}

.nav a:hover {
  color: var(--text-primary);
  text-shadow: 0 0 8px var(--accent-cyan-glow);
}

.nav a:hover::before {
  left: 0;
}

/* === BOUTON MOBILE MODERNE === */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  min-width: 44px;
  min-height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1001;
  position: relative;
}

.mobile-menu-btn:hover,
.mobile-menu-btn:focus {
  background: var(--glass-bg);
}

/* Icône hamburger animée */
.hamburger {
  width: 24px;
  height: 18px;
  position: relative;
  transform: rotate(0deg);
  transition: 0.3s ease-in-out;
}

.hamburger span {
  display: block;
  position: absolute;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  opacity: 1;
  left: 0;
  transform: rotate(0deg);
  transition: 0.3s ease-in-out;
}

.hamburger span:nth-child(1) {
  top: 0px;
}

.hamburger span:nth-child(2) {
  top: 8px;
}

.hamburger span:nth-child(3) {
  top: 16px;
}

/* Animation vers X */
.mobile-menu-btn.active .hamburger span:nth-child(1) {
  top: 8px;
  transform: rotate(135deg);
}

.mobile-menu-btn.active .hamburger span:nth-child(2) {
  opacity: 0;
  left: -24px;
}

.mobile-menu-btn.active .hamburger span:nth-child(3) {
  top: 8px;
  transform: rotate(-135deg);
}

/* ===== HERO SECTION ÉPIQUE ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  
  background: 
    radial-gradient(circle at 30% 70%, var(--accent-cyan-glow) 0%, transparent 80%),
    radial-gradient(circle at 70% 30%, var(--accent-magenta-glow) 0%, transparent 80%);
}

/* === ARRIÈRE-PLAN ANIMÉ === */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(0.5deg); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: var(--space-2xl) var(--space-md);
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  
  animation: slideUp 1s ease-out 0.2s both;
}

.hero p {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
  
  animation: slideUp 1s ease-out 0.4s both;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === CTA BUTTONS === */
.cta-row {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
  animation: slideUp 1s ease-out 0.6s both;
}

/* ===== SYSTÈME DE BOUTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-magenta {
  background: var(--gradient-primary);
  color: var(--primary-900);
  box-shadow: 0 8px 24px rgba(0, 245, 255, 0.3);
}

.btn-magenta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 245, 255, 0.4);
}

.btn-cyan {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
}

.btn-cyan:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
}

/* ===== SECTIONS MODERNES ===== */
.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-2xl);
  
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== CARTES GLASSMORPHISM ===== */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.card, .glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before, .glass::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover, .glass:hover {
  transform: translateY(-8px);
  box-shadow: 
    var(--glass-shadow),
    0 20px 40px rgba(0, 245, 255, 0.1);
  border-color: var(--accent-cyan);
}

.card:hover::before, .glass:hover::before {
  opacity: 1;
}

.badge {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
  color: var(--primary-900);
  box-shadow: 0 8px 24px var(--accent-cyan-glow);
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== QUICK WINS SECTION ===== */
.wins-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.win {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  backdrop-filter: blur(20px);
  transition: all var(--transition-base);
  position: relative;
}

.win:hover {
  transform: translateY(-4px);
  border-color: var(--accent-magenta);
  box-shadow: 0 12px 32px rgba(255, 0, 110, 0.15);
}

.icon.neon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.2rem;
  color: var(--primary-900);
  filter: drop-shadow(0 0 8px var(--accent-cyan-glow));
}

.win h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.win p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== MÉTHODE TIMELINE ===== */
.method .steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  position: relative;
}

.step {
  text-align: center;
  position: relative;
}

.step .icon.neon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-lg);
  font-size: 1.5rem;
}

.step h5 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.step p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== CTA FINAL ===== */
.cta-final {
  background: 
    radial-gradient(circle at 50% 50%, var(--accent-magenta-glow) 0%, transparent 60%);
  text-align: center;
  padding: var(--space-4xl) 0;
}

/* ===== FOOTER MODERNE ===== */
.site-footer {
  background: var(--primary-800);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.site-footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== ANIMATIONS D'APPARITION ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1023px) {
  .nav {
    display: none;
    position: fixed;
    top: 80px;
    left: var(--space-md);
    right: var(--space-md);
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    flex-direction: column;
    gap: 0;
    padding: var(--space-lg);
    border-radius: var(--radius-2xl);
    z-index: 1000;
    transform: translateY(-10px) scale(0.95);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  }
  
  .nav.active {
    display: flex;
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: all;
  }
  
  .nav a {
    width: 100%;
    text-align: center;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 500;
    margin: var(--space-xs) 0;
    background: transparent;
    border: 1px solid transparent;
    transition: all var(--transition-base);
    color: var(--text-secondary);
  }
  
  .nav a:hover {
    background: var(--glass-bg);
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    transform: translateX(4px);
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  /* Overlay pour fermer le menu */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  
  .nav-overlay.active {
    opacity: 1;
    pointer-events: all;
  }
}

@media (max-width: 767px) {
  .hero {
    min-height: 90vh;
  }
  
  .hero-inner {
    padding: var(--space-xl) var(--space-md);
  }
  
  .cta-row {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  
  .cards-3,
  .wins-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .method .steps {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 479px) {
  .container {
    padding: 0 var(--space-sm);
  }
  
  .hero-inner {
    padding: var(--space-lg) var(--space-sm);
  }
  
  .card,
  .win {
    padding: var(--space-lg);
  }
}

/* ===== ACCESSIBILITÉ ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== OPTIMISATIONS PERFORMANCE ===== */
.will-change-transform {
  will-change: transform;
}

.will-change-auto {
  will-change: auto;
}

/* ===== UTILITAIRES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* ===== FORMULAIRE DE CONTACT ===== */
.contact-form .form-group {
  margin-bottom: var(--space-lg);
}

.contact-form label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 245, 255, 0.1);
  background: rgba(255, 255, 255, 0.15);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.5;
}

.contact-form select {
  cursor: pointer;
}

/* Checkbox personnalisée */
.checkbox-group {
  margin: var(--space-xl) 0;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  cursor: pointer;
  font-weight: 400;
  line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  display: flex;
  align-items: center;
    justify-content: center;
  transition: all var(--transition-base);
  flex-shrink: 0;
  margin-top: 2px;
}

.checkbox-label input:checked + .checkmark {
  background: var(--gradient-primary);
  border-color: var(--accent-cyan);
}

.checkbox-label input:checked + .checkmark::after {
  content: "✓";
  color: var(--primary-900);
  font-weight: 700;
  font-size: 0.8rem;
}

.form-actions {
  margin-top: var(--space-2xl);
  text-align: center;
}

.form-note {
  margin-top: var(--space-md);
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Informations de contact */
.contact-info .contact-item {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-info .contact-item:last-child {
  border-bottom: none;
}

.contact-info strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
}

.contact-info p {
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.contact-info a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-base);
}

.contact-info a:hover {
  color: var(--accent-magenta);
  text-decoration: underline;
}

.trust-indicators ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.trust-indicators li {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive pour le formulaire */
@media (max-width: 1023px) {
  .cards-3[style*="grid-template-columns: 2fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
}