#btnTop {
  display: none; /* caché au départ */
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 99;
  font-size: 24px;
  padding: 2px 15px;
  border: none;
  background-color: #e83e8c; /* rose */
  color: white;
  cursor: pointer;
  border-radius: 8px;
  transition: background-color 0.3s, transform 0.3s;
}

#btnTop:hover {
  background-color: #d63384; /* rose foncé au hover */
  transform: scale(1.1);
}