.btn {
  background-color: #FFFF00;
  border: none;
  color: black;
  padding: 16px 32px;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  opacity: 0.6;
  transition: 0.3s;
}

.btn:hover {opacity: 1}

/* Survol de l'Image = Remplacement Image */
.img-hover-container {
  position: relative;
  display: inline-block;
  width: 300px;
  height: auto;
  cursor: pointer; /* Curseur de lien */
}

.img-hover-container img {
  width: 100%;
  height: auto;
  transition: opacity 0.5s ease;
  display: block;
}

.img-hover-container .hover-img {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

.img-hover-container:hover .hover-img {
  opacity: 1;
}

.img-hover-container:hover .default-img {
  opacity: 0;
}