body {
  margin: 0;
  margin-left: 10em;
  font-family: Arial, sans-serif;
  background: #111;
  color: #fff;
  height: 1120px;
  width: 1500px;
  overflow: hidden; /* évite les scrollbars */
}

.slideshow-container {
  position: relative;
   overflow: hidden;
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
}

.slide img {
  width: 100%;
  height: 100%;
}

.caption {
  display: flex;
  justify-content: center;
  width: 18em;
  position: absolute;
  top: 20px;          /* Au lieu de bottom */
  left: 50%;          /* Centré horizontalement */
  transform: translateX(-50%); /* Vraie centrage */
  background: rgba(0,0,0,0.6); /* Fond sombre semi-transparent */
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 1.7em;    /* Taille augmentée */
  font-weight: bold;
  color: rgb(0, 150, 160);  
  text-shadow: 2px 2px 5px rgba(0,0,0,0.8); /* Lisibilité */
}


.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  padding: 12px;
  font-size: 2rem;
  color: white;
  user-select: none;
}

.prev { left: 10px; }
.next { right: 10px; }