.gallery-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  height: auto;
  overflow-y: auto;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
  justify-content: center;
  background-color: #fff;
  padding: 15px 0;
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.filter-btn {
  padding: 10px 20px;
  background-color: #1a237e;
  color: white;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
  text-transform: uppercase;
}

.filter-btn:hover {
  background-color: #283593;
  transform: translateY(-2px);
}

.filter-btn.active {
  background-color: #0d47a1;
  box-shadow: 0 4px 8px rgba(13, 71, 161, 0.3);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 20px 0;
  min-height: calc(100vh - 200px);
}

.gallery-item {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  aspect-ratio: 4/3;
  opacity: 1;
  transform: translateY(0);
}

.gallery-item.hidden {
  display: none;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  padding: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .overlay {
  opacity: 1;
}

.category-tag {
  color: white;
  font-size: 14px;
  background-color: #1a237e;
  padding: 5px 10px;
  border-radius: 15px;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
  .filter-buttons {
      gap: 5px;
      padding: 10px 0;
  }

  .filter-btn {
      padding: 8px 15px;
      font-size: 12px;
  }

  .gallery-grid {
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 15px;
  }
}

@media screen and (max-width: 480px) {
  .gallery-container {
      padding: 10px;
  }

  .filter-btn {
      padding: 6px 12px;
      font-size: 11px;
  }

  .gallery-grid {
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 10px;
  }
}