/* Fond gris clair général */
body {
  background-color: #0a245e;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #333;
}
/* ===== HEADER ===== */
header {
  background-color: #0a245e;
  padding: 40px 20px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  color: #ffffff;
}

header p {
  font-size: 1.2rem;
  color: #ffffff;
}

header a {
  display: inline-block;
  margin-top: 15px;
  background-color: #0077b6;
  color: #fff;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
  transition: background 0.3s ease;
}

header a:hover {
  background-color: #023e8a;
}