body { background-color: black; color: white; } #menu { display: flex; } #menu h1 { margin: 10px; margin-right: 25%; } header { width: 100%; margin: 10px; display: flex; justify-content: space-around; } header a { text-align: center; color: white; text-decoration: none; margin-right: 25%; padding: 10px; white-space: nowrap; } header a:hover { background-color: white; color: black; } #select { background-color: grey; } #select:hover { background-color: grey; color: white; } #lienAccueil { text-decoration: none; color: white; }