/* Variables CSS */
:root {
  --primary-blue: #1E3A8A;
  --light-blue: #3B82F6;
  --silver: #C0C0C0;
  --light-silver: #E5E7EB;
  --dark: #1F2937;
  --white: #FFFFFF;
}

/* Reset et styles de base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--white);
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark) 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* Sections */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--white), var(--silver));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

.section-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Boutons */
.btn {
  display: inline-block;
  padding: 15px 35px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
  color: var(--white);
  box-shadow: 0 8px 30px rgba(30, 58, 138, 0.3);
  border: 0px solid transparent;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(30, 58, 138, 0.4);
  border: 2px solid var(--silver);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  border-color: var(--silver);
}

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

.slide-up {
  animation: slideUp 0.6s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 2.2rem;
  }
  
  .section-subtitle {
    font-size: 1.1rem;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .btn {
    padding: 12px 28px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }
  
  .btn {
    padding: 10px 24px;
    font-size: 0.95rem;
  }
}

/* Barre de défilement personnalisée */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--light-blue), var(--primary-blue));
}