/* CSS Variables */
:root {
  /* Colors - Dark Mode */
  --bg-primary: #0a0a0f;
  --bg-secondary: #13131a;
  --bg-card: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6c6c7c;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --border-color: rgba(255, 255, 255, 0.1);
  --glow-color: rgba(99, 102, 241, 0.3);
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Spacing */
  --section-padding: 8rem 2rem;
  --container-max: 1200px;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 4rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

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

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-base);
}

button {
  font-family: inherit;
  border: none;
  cursor: pointer;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Navigation */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  transition: var(--transition-base);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2.5rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: var(--transition-base);
}

.nav-menu a:hover {
  color: var(--text-primary);
}

.nav-menu a:hover::after {
  width: 100%;
}

.cta-small {
  background: var(--accent-gradient);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: var(--transition-base);
}

.cta-small:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--glow-color);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: transparent;
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  background: var(--bg-primary);
  z-index: 2000;
  padding: 2rem;
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
  background: transparent;
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.mobile-menu-close:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mobile-menu-list {
  list-style: none;
  flex: 1;
}

.mobile-menu-list li {
  margin-bottom: 1.5rem;
}

.mobile-menu-list a {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  padding: 0.5rem 0;
  transition: var(--transition-base);
}

.mobile-menu-list a:hover {
  color: var(--accent-primary);
  padding-left: 1rem;
}

.mobile-menu-footer {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.mobile-cta {
  width: 100%;
  justify-content: center;
}

/* Hero Section */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--section-padding);
  padding-top: 120px;
  background: radial-gradient(ellipse at top right, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at bottom left, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
              var(--bg-primary);
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366f1' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
  padding: 1rem 2rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 15px var(--glow-color);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--glow-color);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

/* Ripple Effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: ripple-animation 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.mockup-container {
  position: relative;
  width: 300px;
  height: 500px;
}

.iphone-mockup {
  position: absolute;
  width: 180px;
  height: 360px;
  background: linear-gradient(145deg, #2a2a3e 0%, #1a1a2e 100%);
  border-radius: 30px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  left: 0;
  top: 50%;
  transform: translateY(-50%) perspective(1000px) rotateY(15deg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.iphone-mockup::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 20px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 10px;
}

.android-mockup {
  position: absolute;
  width: 180px;
  height: 360px;
  background: linear-gradient(145deg, #1a1a2e 0%, #2a2a3e 100%);
  border-radius: 30px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  right: 0;
  top: 50%;
  transform: translateY(-50%) perspective(1000px) rotateY(-15deg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

/* Mockup Screen Content */
.mockup-screen {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 27px;
}

.glow-effect {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
  filter: blur(60px);
  animation: pulse 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

/* Sections General */
section {
  padding: var(--section-padding);
}

.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: 4rem;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Problème Section */
#probleme {
  background: var(--bg-secondary);
}

.probleme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.probleme-item {
  background: var(--bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
  transition: var(--transition-base);
  text-align: center;
}

.probleme-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.icon-container {
  width: 60px;
  height: 60px;
  background: var(--accent-gradient);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.icon {
  width: 30px;
  height: 30px;
  color: white;
}

.probleme-item h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

/* Solution Section */
#solution {
  background: var(--bg-primary);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.solution-item {
  background: var(--bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
  transition: var(--transition-base);
}

.solution-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent-secondary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.solution-item h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

/* Marche Section */
#marche {
  background: var(--bg-secondary);
}

.marche-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  counter-reset: step;
}

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

.step-number {
  width: 60px;
  height: 60px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: white;
  margin: 0 auto 1.5rem;
  position: relative;
}

.step:not(:last-child) .step-number::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -100%;
  width: 80%;
  height: 2px;
  background: var(--accent-primary);
  transform: translateY(-50%);
  opacity: 0.3;
}

.step h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

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

/* Usage Section */
#usage {
  background: var(--bg-primary);
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.usage-item {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition-base);
}

.usage-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
}

.usage-item h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.usage-item p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Cas Section */
#cas {
  background: var(--bg-secondary);
}

.cas-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.cas-item {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition-base);
}

.cas-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent-secondary);
}

.cas-item h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.cas-item p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Final CTA */
#final-cta {
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

#final-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 50%);
  animation: rotate 20s linear infinite;
  pointer-events: none;
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.cta-container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-container h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* Footer */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-content p {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: var(--transition-base);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-visual {
    order: -1;
    height: 300px;
  }
  
  .mockup-container {
    transform: scale(0.8);
  }
  
  .marche-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .step:not(:last-child) .step-number::after {
    display: none;
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .nav-menu {
    display: none;
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .probleme-grid,
  .solution-grid,
  .usage-grid,
  .cas-grid {
    grid-template-columns: 1fr;
  }
  
  .marche-steps {
    grid-template-columns: 1fr;
  }
  
  .cta-buttons {
    justify-content: center;
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

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

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}