* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #0d0d0d;
  color: #ccc;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 4px;
  padding: 4px;
}

.gallery img {
  width: 100%;
  height: auto;
  display: block;
  cursor: pointer;
  transition: opacity 0.2s;
}

.gallery img:hover {
  opacity: 0.85;
}

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  user-select: none;
}

.lightbox .nav-prev,
.lightbox .nav-next {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 10%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2rem;
  opacity: 0;
  transition: opacity 0.2s;
  user-select: none;
}

.lightbox .nav-prev:hover,
.lightbox .nav-next:hover {
  opacity: 1;
}

.lightbox .nav-prev { left: 0; }
.lightbox .nav-next { right: 0; }

.lightbox .counter {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  color: #888;
  font-size: 0.875rem;
}

@media (max-width: 600px) {
  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 2px;
    padding: 2px;
  }
}