.gallery {
  max-width: 960px;
  margin: 0 auto;
}

.slider-for {
  margin-bottom: 16px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.slider-for img {
  display: block;
  width: 100%;
  height: auto;
  cursor: pointer;
}

.slider-nav {
  margin: 0;
  padding: 0;
}

@media (max-width: 768px) {
  .slider-nav {
    padding: 0 35px;
  }
}

.slider-nav .slick-slide {
  margin: 0 6px;
}

.slider-nav img {
  width: 100%;
  height: 80px;
  object-fit: cover;
  border: 2px solid transparent;
  transition: border-color 0.3s ease;
  cursor: pointer;
}

.slider-nav .slick-current img {
  border-color: #1e90ff;
}

@media (max-width: 640px) {
  .slider-nav img {
    height: 64px;
  }
}

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.lightbox img {
  max-width: 80%;
  max-height: 80%;
}

.lightbox .close {
  position: absolute;
  top: 50px;
  right: 50px;
  font-size: 36px;
  color: #fff;
  cursor: pointer;
  font-weight: bold;
}

@media (max-width: 640px) {
  .slider-nav img { height: 64px; }
}