* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Poppins', sans-serif;
  background: #f8f9fa;
  color: #333;
}
header {
  text-align: center;
  padding: 2rem 1rem;
}
header h1 {
  font-size: 2.5rem;
}
header p {
  font-size: 1.1rem;
  color: #555;
}
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}
.gallery-item img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  cursor: pointer;
  transition: transform 0.3s ease;
}
.gallery-item img:hover {
  transform: scale(1.05);
}
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  z-index: 999;
}
.lightbox-img {
  max-width: 90%;
  max-height: 80vh;
  border-radius: 10px;
  margin-bottom: 10px;
}
.lightbox-caption {
  color: #fff;
  margin-bottom: 1rem;
}
.close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
}
.prev, .next {
  position: absolute;
  top: 50%;
  color: #fff;
  font-size: 2rem;
  background: transparent;
  border: none;
  cursor: pointer;
  transform: translateY(-50%);
  padding: 0 20px;
}
.prev { left: 20px; }
.next { right: 20px; }
@media (max-width: 600px) {
  .prev, .next {
    font-size: 1.5rem;
  }
}