:root { 
  --max: 980px; 
  --primary: #06b6d4;
  --primary-dark: #0891b2;
  --primary-light: #cffafe;
  --accent: #14b8a6;
  --success: #10b981;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --gray-900: #111827;
}

body { 
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif; 
  margin: 0; 
  line-height: 1.6; 
  color: #333;
  background: var(--gray-50);
}

header, main, footer { 
  max-width: var(--max); 
  margin: 0 auto; 
  padding: 24px; 
}

header { 
  padding: 16px 24px; 
  background: linear-gradient(135deg, #ffffff 0%, #f0fdfa 100%);
  border-bottom: 3px solid var(--primary);
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.1);
  position: relative;
}

nav a { 
  margin-right: 14px; 
  text-decoration: none; 
  color: var(--primary);
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover { 
  color: var(--primary-dark); 
}

.tag { 
  display: inline-block; 
  padding: 6px 14px; 
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 999px; 
  margin: 6px 6px 0 0; 
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--primary);
}

.card { 
  border: 1px solid var(--gray-200); 
  border-radius: 14px; 
  padding: 24px; 
  margin: 16px 0; 
  background: white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover { 
  box-shadow: 0 4px 12px rgba(37,99,235,0.1);
  transform: translateY(-2px);
}

.card h3 { 
  color: var(--primary-dark); 
  margin-top: 0;
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: 8px;
}

h1 { 
  margin: 0 0 12px; 
  font-size: 38px; 
  color: var(--gray-900);
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 { 
  margin: 40px 0 16px; 
  font-size: 26px; 
  color: var(--gray-900);
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

h3 {
  color: var(--primary-dark);
  font-size: 20px;
}

.muted { 
  color: var(--gray-600); 
}

.grid { 
  display: grid; 
  grid-template-columns: 1fr; 
  gap: 20px; 
}

@media (min-width: 860px) { 
  .grid { 
    grid-template-columns: 1fr 1fr; 
  } 
}

ul { 
  padding-left: 20px; 
}

li { 
  margin: 8px 0; 
}

.cta { 
  display: inline-block; 
  padding: 12px 24px; 
  background: var(--primary);
  color: white;
  border-radius: 10px; 
  text-decoration: none; 
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

.cta:hover { 
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.4);
}

.small { 
  font-size: 14px; 
}

section { 
  background: white;
  border-radius: 16px;
  padding: 32px 24px;
  margin: 24px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

footer {
  background: var(--gray-100);
  border-top: 1px solid var(--gray-200);
  margin-top: 60px;
  text-align: center;
}

.highlight {
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  border-left: 4px solid var(--primary);
}

table { 
  width: 100%; 
  border-collapse: collapse; 
  margin: 20px 0; 
}

th, td { 
  padding: 12px; 
  text-align: left; 
  border-bottom: 1px solid var(--gray-200); 
}

th { 
  background: var(--gray-50); 
  font-weight: 600; 
}

/* ========== NAVIGATION DESKTOP / MOBILE ========== */

/* Navigation desktop - visible par défaut */
.desktop-nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

/* ========== RESPONSIVE DESIGN - MOBILE ========== */

/* Bouton hamburger mobile */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.mobile-menu-btn.open span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-btn.open span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.open span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Menu mobile */
.mobile-nav {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
  border-bottom: 3px solid var(--primary);
  z-index: 1000;
  overflow: hidden;
}

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

.mobile-nav a {
  padding: 16px 24px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--gray-100);
  transition: background 0.2s;
}

.mobile-nav a:hover {
  background: var(--primary-light);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

@media (max-width: 768px) {
  /* Cacher navigation desktop, afficher bouton hamburger */
  .desktop-nav {
    display: none !important;
  }

  .mobile-menu-btn {
    display: flex;
  }

  /* En-tête responsive */
  header {
    padding: 12px 16px;
  }

  header > div {
    position: relative;
  }

  header img {
    height: 180px !important;
  }

  /* Navigation mobile styles déjà définis plus haut */

  /* Typographie mobile */
  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 22px;
    margin: 24px 0 12px;
  }

  h3 {
    font-size: 18px;
  }

  /* Sections et cartes */
  section {
    padding: 20px 16px;
    margin: 16px 0;
  }

  .card {
    padding: 16px;
    margin: 12px 0;
  }

  /* Espacement général */
  header, main, footer {
    padding: 16px;
  }

  /* Boutons pleine largeur sur mobile */
  .cta {
    display: block;
    width: 100%;
    text-align: center;
    box-sizing: border-box;
  }

  /* Tags plus petits */
  .tag {
    font-size: 12px;
    padding: 4px 10px;
    margin: 4px 4px 0 0;
  }

  /* Grille en une colonne sur mobile */
  .grid {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }

  /* Tableaux responsive */
  table {
    font-size: 14px;
  }

  th, td {
    padding: 8px;
  }

  /* Navigation plus compacte */
  nav a {
    font-size: 14px;
  }

  /* Hero sections mobiles */
  section[style*="text-align: center"] {
    padding: 24px 16px !important;
  }

  section[style*="text-align: center"] h1 {
    font-size: 24px;
  }

  section[style*="text-align: center"] p {
    font-size: 16px !important;
  }
}

/* Très petits écrans (< 400px) */
@media (max-width: 400px) {
  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  header img {
    height: 100px !important;
  }

  .tag {
    font-size: 11px;
    padding: 3px 8px;
  }
}