body {
  font-family: Arial;
  text-align: center;
  background: #111;
  color: white;
}

h1 {
  margin: 20px;
}

/* Buttons */
.filter-buttons {
  margin-bottom: 20px;
}

.filter-btn {
  padding: 10px 20px;
  margin: 5px;
  border: none;
  cursor: pointer;
  background: #333;
  color: white;
  border-radius: 20px;
  transition: 0.3s;
}

.filter-btn:hover {
  background: #ff9800;
  transform: scale(1.1);
}

.filter-btn.active {
  background: #ff5722;
}

/* Gallery */
.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.gallery img {
  width: 200px;
  height: 150px;
  object-fit: cover;
  cursor: pointer;
  transition: 0.3s;
}

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

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
}

.lightbox img {
  max-width: 80%;
  margin-top: 5%;
}

/* Close */
.close {
  position: absolute;
  top: 20px;
  right: 40px;
  font-size: 40px;
  cursor: pointer;
}

/* Navigation */
.prev, .next {
  position: absolute;
  top: 50%;
  font-size: 40px;
  background: transparent;
  border: none;
  color: white;
  cursor: pointer;
}

.prev { left: 20px; }
.next { right: 20px; }