/* Styles principaux pour l'expérience CFA.
   Pensés pour offrir une lecture claire, des zones cliquables généreuses
   et une hiérarchie visuelle nette même lorsque les assets avancés sont absents. */

:root {
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --radius: 12px;
  --max-width: 1200px;
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary, #ffffff);
  color: var(--text-primary, #111827);
  line-height: 1.6;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-overlay, rgba(255, 255, 255, 0.92));
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-primary, #e5e7eb);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-links, .nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary, #111827);
  margin: 4px 0;
  transition: transform 0.2s ease;
}

.nav-link {
  text-decoration: none;
  font-weight: 600;
  color: var(--text-secondary, #4b5563);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary, #111827);
  background: var(--bg-tertiary, #f8fafc);
}

.hero {
  padding: 120px var(--space-4) 80px;
  background: var(--gradient-hero, linear-gradient(135deg, #2D5A27, #FF6B47 50%, #1E3A8A));
  color: #fff;
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.hero-title {
  font-size: clamp(2rem, 3vw, 3rem);
  margin: 0 0 var(--space-3);
}

.hero-description {
  margin: 0 0 var(--space-4);
  max-width: 600px;
}

.impact-stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.impact-card {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  min-width: 160px;
  backdrop-filter: blur(6px);
  display: grid;
  gap: 0.35rem;
}

.impact-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.8;
}

.impact-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.impact-unit {
  font-size: 0.8rem;
  opacity: 0.8;
}

.btn {
  border: none;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--gradient-primary, linear-gradient(135deg, #2D5A27, #FF6B47));
  color: #fff;
  box-shadow: var(--shadow-md, 0 4px 6px rgba(0,0,0,0.1));
}

.btn-secondary {
  background: #fff;
  color: var(--text-primary, #111827);
  border: 1px solid var(--border-primary, #e5e7eb);
}

.btn:focus-visible {
  outline: 3px solid var(--border-focus, #2563eb);
  outline-offset: 2px;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 40;
}

.modal.open {
  display: flex;
}

.modal-content {
  max-width: 520px;
  width: 100%;
  border-radius: 16px;
  padding: 1.5rem;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
}

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px var(--space-4);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--gradient-card, linear-gradient(145deg, #ffffff, #f8fafc));
  border: 1px solid var(--border-primary, #e5e7eb);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-md, 0 4px 6px rgba(0,0,0,0.08));
}

.card h3 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: 1.1rem;
}

.supply-dashboard {
  margin-top: 2.5rem;
  padding: 2rem;
  border-radius: calc(var(--radius) * 1.5);
  background: var(--bg-secondary, #f8fafc);
  border: 1px solid var(--border-primary, #e5e7eb);
  display: grid;
  gap: 1.5rem;
}

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

.status-pill {
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success-color, #10B981);
  font-weight: 600;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.dashboard-card {
  background: var(--bg-primary, #ffffff);
  border-radius: var(--radius);
  border: 1px solid var(--border-primary, #e5e7eb);
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.08));
}

.braking-display {
  display: grid;
  gap: 0.5rem;
}

.braking-bar {
  height: 10px;
  border-radius: 999px;
  background: var(--bg-tertiary, #f1f5f9);
  overflow: hidden;
}

.braking-fill {
  display: block;
  height: 100%;
  width: 45%;
  background: linear-gradient(90deg, #10B981, #F59E0B, #EF4444);
  transition: width 0.4s var(--ease-spring);
}

.braking-meta {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
}

.range-label {
  font-size: 0.85rem;
  font-weight: 600;
}

.brake-range {
  width: 100%;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-weight: 600;
}

.toggle-input {
  position: absolute;
  opacity: 0;
}

.toggle-slider {
  width: 44px;
  height: 24px;
  background: var(--bg-tertiary, #f1f5f9);
  border-radius: 999px;
  position: relative;
  transition: background 0.3s ease;
}

.toggle-slider::after {
  content: '';
  width: 18px;
  height: 18px;
  background: var(--bg-primary, #ffffff);
  border-radius: 50%;
  position: absolute;
  top: 3px;
  left: 3px;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.2));
}

.toggle-input:checked + .toggle-slider {
  background: rgba(59, 130, 246, 0.4);
}

.toggle-input:checked + .toggle-slider::after {
  transform: translateX(20px);
}

.toggle-text {
  font-size: 0.9rem;
}

.meter {
  display: grid;
  gap: 0.5rem;
}

.meter-track {
  height: 8px;
  background: var(--bg-tertiary, #f1f5f9);
  border-radius: 999px;
  overflow: hidden;
}

.meter-fill {
  display: block;
  height: 100%;
  background: var(--gradient-primary, linear-gradient(135deg, #2D5A27, #FF6B47));
  transition: width 0.4s var(--ease-spring);
}

.meter-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 600;
}

.chip-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chip {
  border: 1px solid var(--border-primary, #e5e7eb);
  background: var(--bg-secondary, #f8fafc);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease;
}

.chip.active {
  background: var(--primary-color, #2D5A27);
  color: var(--text-inverse, #ffffff);
}

.timeline {
  display: grid;
  gap: 0.8rem;
}

.timeline-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--secondary-color, #FF6B47);
  margin-top: 0.3rem;
}

.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 0.75rem 1rem;
  background: var(--bg-primary, #ffffff);
  border: 1px solid var(--border-primary, #e5e7eb);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg, 0 10px 20px rgba(0,0,0,0.15));
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 50;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.footer {
  background: var(--bg-secondary, #f3f4f6);
  padding: 40px var(--space-4);
  text-align: center;
  border-top: 1px solid var(--border-primary, #e5e7eb);
}

@media (max-width: 900px) {
  .nav-container, .hero-content {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links, .nav-actions {
    flex-wrap: wrap;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
  }

  .nav-open .nav-links {
    display: flex;
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .impact-stats {
    width: 100%;
  }

  .toast {
    right: 1rem;
    left: 1rem;
  }
}