:root {
  --primary-color: #1e3a5f;        /* Bleu marine professionnel */
  --primary-light: #2d4a6b;       /* Variante plus claire */
  --secondary-color: #f5f6f7;      /* Gris très clair */
  --accent-color: #b8860b;         /* Or discret */
  --warning-color: #d4a574;        /* Beige/or pour alertes */
  --success-color: #5a7a5a;        /* Vert olive discret */
  --danger-color: #8b4a47;         /* Rouge bordeaux discret */
  --text-dark: #2c3e50;            /* Gris anthracite pour texte */
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-dark);
}

.bg-gradient {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.btn-warning {
  background-color: var(--warning-color);
  border-color: var(--warning-color);
  color: var(--text-dark);
  font-weight: 600;
}

.btn-warning:hover {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

.card {
  transition: transform 0.2s ease-in-out;
  border: none;
}

.card:hover {
  transform: translateY(-5px);
}

.section-header {
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(30, 58, 95, 0.25);
}

.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 1rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-marker {
  position: absolute;
  left: -2rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.875rem;
}

.timeline-content {
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 0.5rem;
  border-left: 4px solid var(--primary-color);
}

.sticky-top {
  position: sticky;
  top: 20px;
  z-index: 1020;
}

@media (max-width: 768px) {
  .hero-section {
    min-height: 50vh;
    text-align: center;
  }
  
  .display-4 {
    font-size: 2rem;
  }
  
  .timeline {
    padding-left: 1rem;
  }
  
  .timeline::before {
    left: 0.5rem;
  }
  
  .timeline-marker {
    left: -1.5rem;
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.75rem;
  }
}

.text-primary {
  color: var(--primary-color) !important;
}

.bg-primary {
  background-color: var(--primary-color) !important;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
}

.navbar-brand {
  font-size: 1.5rem;
}

.lead {
  font-size: 1.1rem;
  line-height: 1.6;
}

.alert {
  border: none;
  border-radius: 0.5rem;
}

.card-header {
  border-bottom: none;
  font-weight: 600;
}

.accordion-button:not(.collapsed) {
  background-color: var(--primary-color);
  color: white;
}

.accordion-button:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.25rem rgba(30, 58, 95, 0.25);
}

.form-check-input:checked {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
}

.text-warning {
  color: var(--accent-color) !important;
}

.bg-warning {
  background-color: var(--warning-color) !important;
}

.d-none {
  display: none !important;
}

.shadow-lg {
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}

footer a {
  transition: opacity 0.2s ease;
}

footer a:hover {
  opacity: 0.8;
}