.mentions {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh; 
  background-color: black; /* optionnel */
  color: white; /* optionnel */
  text-align: center;
}

.mentions h1 {
  font-size: 4rem; 
  margin: 0;
}

body {
    background-color: #000000; 
    color: #fff; 
}