.gallery-thumb {
  width: 150px;
  cursor: pointer;
  transition: 0.3s;
}

.gallery-thumb:hover { opacity: 0.7; }

/* Pozadí lightboxu */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  padding-top: 50px;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
}

/* Obsah (obrázek) */
.modal-content {
  position: relative;
  margin: auto;
  padding: 0;
  width: 90%;
  max-width: 800px;
  color: white;
}

.mySlides { display: none; }

/* Tlačítka pro zavření a šipky */
.close {
  position: absolute;
  top: 20px; right: 35px;
  color: white; font-size: 40px;
  font-weight: bold; cursor: pointer;
}

.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  user-select: none;
}

.next { right: 0; border-radius: 3px 0 0 3px; }
.prev { left: 0; border-radius: 0 3px 3px 0; }

.prev:hover, .next:hover { background-color: rgba(0, 0, 0, 0.8); }