:root {
  /* Couleurs principales */
  --primary: #2563EB;        
  --primary-light: #3B82F6;  
  --primary-dark: #1D4ED8;   
  
  /* Couleurs CTA */
  --cta: #10B981;           
  --cta-hover: #059669;     
  --cta-light: #D1FAE5;     
  
  /* Couleurs neutres */
  --text: #111827;          
  --text-light: #6B7280;    
  --text-muted: #9CA3AF;    
  
  /* Backgrounds */
  --background: #FFFFFF;     
  --section-bg: #F9FAFB;     
  --card-bg: #FFFFFF;        
  
  /* Borders */
  --border: #E5E7EB;        
  --border-light: #F3F4F6;  
  
  /* Status colors */
  --success: #10B981;       
  --warning: #F59E0B;       
  --info: #3B82F6;         
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--background);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography */
h1, h2, h3 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  color: var(--text);
}

h2 {
  font-size: clamp(2rem, 3vw, 2.5rem);
  color: var(--text);
  text-align: center;
  margin-bottom: 2rem;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  color: var(--text);
}

p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 1rem;
}

/* Highlight */
.highlight {
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* CTA Buttons */
.cta-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--cta), var(--cta-hover));
  color: white;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  padding: 1rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
  border: none;
  cursor: pointer;
}

.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
  background: linear-gradient(135deg, var(--cta-hover), var(--cta));
}

.cta-large {
  font-size: 1.3rem;
  padding: 1.25rem 2.5rem;
}

/* Sections */
section {
  padding: 4rem 0;
}

section:nth-child(even) {
  background: var(--section-bg);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--background) 0%, var(--section-bg) 100%);
  padding: 6rem 0;
  text-align: center;
}

.hero h1 {
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease;
}

.subtitle {
  font-size: 1.3rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease 0.2s both;
}

.hero .cta-primary {
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.6s both;
}

.feature-item {
  font-size: 1rem;
  color: var(--success);
  font-weight: 500;
}

/* Problem Section */
.problem {
  padding: 5rem 0;
}

.problem-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pain-point, .consequences, .cost-inaction {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border-left: 4px solid var(--primary);
  transition: transform 0.3s ease;
}

.pain-point:hover, .consequences:hover, .cost-inaction:hover {
  transform: translateY(-5px);
}

.consequences ul {
  list-style: none;
  padding-left: 0;
}

.consequences li {
  margin-bottom: 0.5rem;
  padding-left: 1.5rem;
  position: relative;
}

.consequences li:before {
  content: "❌";
  position: absolute;
  left: 0;
}

/* Persona Section */
.persona {
  padding: 5rem 0;
}

.persona-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.persona-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.persona-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-light);
}

/* Value Proposition */
.value-proposition {
  padding: 5rem 0;
}

.uvp-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 3rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.differentiator, .quantified-benefit, .unique-value {
  text-align: center;
  padding: 2rem;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: white;
  border-radius: 16px;
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.differentiator h3, .quantified-benefit h3, .unique-value h3 {
  color: white;
  margin-bottom: 1rem;
}

.differentiator p, .quantified-benefit p, .unique-value p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
}

/* Benefits Section */
.benefits {
  padding: 5rem 0;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.benefit-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.benefit-card:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--cta));
}

.benefit-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.benefit-card h3 {
  color: var(--text);
  margin-bottom: 1rem;
}

.benefit-card p {
  color: var(--text-light);
  margin-bottom: 1rem;
}

.metric {
  background: var(--cta-light);
  color: var(--cta-hover);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-block;
}

/* CTA Final Section */
.cta-final {
  background: linear-gradient(135deg, var(--section-bg) 0%, var(--background) 100%);
  padding: 6rem 0;
  text-align: center;
}

.trust-element {
  font-size: 1.2rem;
  color: var(--success);
  margin-bottom: 2rem;
  font-weight: 500;
}

.final-benefits {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.final-benefit {
  color: var(--text-light);
  font-size: 1rem;
  font-weight: 500;
}

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

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

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

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }
  
  section {
    padding: 3rem 0;
  }
  
  .hero {
    padding: 4rem 0;
  }
  
  .hero-features {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .problem-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .persona-cards {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .final-benefits {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .cta-primary {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
  
  .cta-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .pain-point, .consequences, .cost-inaction,
  .persona-card, .benefit-card {
    padding: 1.5rem;
  }
  
  .uvp-content .differentiator,
  .uvp-content .quantified-benefit,
  .uvp-content .unique-value {
    padding: 1.5rem;
  }
}