html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

main.pourquoi {
  flex: 1;
}

/* ------------------------------
   TITRE
------------------------------ */
.pourquoi h1 {
  text-align: center;
  color: #1A3D6B;
  margin-bottom: 30px;
}

/* ------------------------------
   LISTE DES AVANTAGES
------------------------------ */
.avantages {
  list-style: none;
  padding-left: 0;
  max-width: 700px;
  margin: 0 auto;
}

.avantages li {
  background: #f5f8fc;
  padding: 15px 20px;
  border-left: 4px solid #1A3D6B;
  border-radius: 6px;
  margin-bottom: 15px;
  font-size: 1.05rem;
  color: #333;
  transition: background 0.2s ease;
}

.avantages li:hover {
  background: #e8f0fa;
}