/* ===== Base ===== */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #4b6ef5, #3ad6a7);
}

/* ===== Header / Menu ===== */
header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 1000;
  transition: top 0.3s ease; 
}

.menu {
  background-color: #333;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo-group img {
  height: 45px;
  width: auto;
  cursor: pointer;
}

/* Menu UL */
.menu ul {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu a {
  color: white;
  font-weight: bold;
  padding: 15px 20px;
  text-decoration: none;
  display: block;
}

.menu li:hover a {
  background-color: #444;
  border-radius: 5px;
}

/* ===== Zone page (contenu sous menu) ===== */
.page {
  margin-top: 120px; /* place menu */
  width: min(1200px, 92%);
  margin-left: auto;
  margin-right: auto;
  padding-bottom: 60px;
}

/* ===== Carte générique  ===== */
.card {
  background: white;
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
  color