.product-gallery {
    position: relative;
    display: flex;
    flex-direction: column;
  }
  
  .product-gallery #main-image {
    cursor: pointer;
    width: 70%; /* Zde nastavte požadovanou pevnou šířku obrázku */
    height: 20rem; /* Zde nastavte požadovanou pevnou výšku obrázku */
    object-fit: contain;  
  }
  
  .thumbnail-container {

  }
  
  .thumbnail {
    width: 5rem;
    height: 5rem;
    object-fit: cover;  
    margin: 10px;
    opacity: 0.5;
    cursor: pointer;
    transition: 0.3s;
    background-color: #E8E8E8;
  }
  
  .thumbnail:hover {
    opacity: 1;
    transition: 0.3s;
  }
  
  .lightbox {
    display: none;
    position: fixed;
    z-index: 999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
  }
  
  .lightbox-image {
    display: block;
    margin: 50px auto;
    max-width: 80%;
    max-height: 80%;
  }
  
  .close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 2.5rem;
    font-weight: bold;
    cursor: pointer;
  }
  
  .lightbox-nav {
    position: absolute;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    top: 45%;
    left: 0;
    right: 0;
    text-align: center;
  }
  
  .prev,
  .next {
    color: #fff;
    font-size: 4rem;
    font-weight: bold;
    cursor: pointer;
    padding: 1rem 2rem;
    user-select: none;
  }