.nst-topic-title {
  text-align: center;
  margin: 1.5em 0;
  font-size: 1.8em;
  font-weight: bold;
}

.nst-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 10px;
  padding: 10px;
}

.nst-gallery-grid a {
  position: relative;
  display: block;
}

.nst-gallery-grid img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  transition: transform 0.3s ease;
}

.nst-gallery-grid img:hover {
  transform: scale(1.03);
}

.nst-caption-text {
  position: absolute;
  bottom: 5px;
  left: 5px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 0.9em;
}

.nst-swiper {
  width: 100%;
  max-width: 900px;
  margin: 30px auto;
  position: relative;
  border-radius: 10px;
  overflow: hidden;
}

.nst-swiper img {
  width: 100%;
  height: 450px;
  object-fit: cover;
}

.swiper-button-prev,
.swiper-button-next {
  color: #fff;
}

.swiper-pagination-bullet-active {
  background: #0073aa;
}