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

body {
  background: #fff;
  color: #111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Header */
header {
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
}

.site-name {
  text-decoration: none;
  color: #111;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.site-name:hover {
  color: #555;
}

/* Gallery title */
.gallery-title {
  text-align: center;
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2rem 1rem 3rem;
}

/* Grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 0 4px 4px;
  max-width: 1400px;
  margin: 0 auto;
}

.gallery-item {
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #f0f0f0;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.2s ease;
  cursor: pointer;
}

.gallery-item:hover img {
  opacity: 0.88;
}

@media (max-width: 900px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .gallery {
    grid-template-columns: 1fr;
    gap: 2px;
    padding: 0 2px 2px;
  }
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lb-img {
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  display: block;
}

.lb-close,
.lb-prev,
.lb-next {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  opacity: 0.7;
  line-height: 1;
  padding: 1rem;
  transition: opacity 0.15s ease;
}

.lb-close:hover,
.lb-prev:hover,
.lb-next:hover {
  opacity: 1;
}

.lb-close {
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
}

.lb-prev,
.lb-next {
  top: 50%;
  transform: translateY(-50%);
  font-size: 3.5rem;
}

.lb-prev {
  left: 0.5rem;
}

.lb-next {
  right: 0.5rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 1rem;
  font-size: 0.75rem;
  color: #999;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}