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

body {
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f8f9fa;
}

header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: white;
  padding: 2.5rem 2rem;
  text-align: center;
}

.sous-titre {
  margin-top: 0.5rem;
  opacity: 0.8;
}

nav {
  background: white;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
}

nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: #0f766e;
  font-weight: 500;
}

nav a:hover {
  color: #14b8a6;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

section {
  margin-bottom: 3rem;
}

h2 {
  color: #0f172a;
  margin-bottom: 1rem;
  border-bottom: 2px solid #14b8a6;
  padding-bottom: 0.5rem;
}

ul {
  margin: 1rem 0 1rem 2rem;
}

.version {
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-radius: 12px;
}

.v1 {
  background: #eef2ff;
  border-left: 4px solid #6366f1;
}

.v2 {
  background: #ecfdf5;
  border-left: 4px solid #10b981;
}

.version h3 {
  margin-bottom: 0.5rem;
}

footer {
  text-align: center;
  padding: 2rem;
  color: #64748b;
  font-size: 0.9rem;
}