.image-gallery {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: auto;
    overflow: hidden;
    background: #fff;
  }

  .image-gallery img {
    width: 100%;
    display: block;
  }

  .gallery-arrow {
    position: absolute;
    top: 50%;
    z-index: 2;
    width: 40px;          /* larghezza del bottone */
    height: 40px;         /* altezza del bottone */
    display: flex;
    justify-content: center; /* centro orizzontale */
    align-items: center;     /* centro verticale */
    color: white;
    background: rgba(0,0,0,0.5);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1.5rem;
  }

  .arrow-left { left: 10px; }
  .arrow-right { right: 10px; }

  .gallery-thumbnails {
    display: flex;
    justify-content: center;
    margin-top: 10px;
    gap: 5px;
    flex-wrap: wrap;
  }

  .gallery-thumbnails img {
    width: 60px;
    height: 40px;
    object-fit: cover;
    cursor: pointer;
    opacity: 0.6;
    border: 2px solid transparent;
    transition: all 0.2s;
  }

  .gallery-thumbnails img.active {
    border: 2px solid #4b4b4b;
    opacity: 1;
  }
  
  .image-gallery img {
    margin: auto;
    width: 100%;
    max-width: 400px;
    display: block;
    opacity: 1;
    transition: opacity 0.4s ease;
  }