:root {
  --gap: 13px;
}

.main-content {
  padding-bottom: 2rem;
}

/* ── PHOTO GRID: left-to-right masonry ── */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 10px;
  column-gap: var(--gap);
  row-gap: 0;
  width: 100%;
}

.photo-grid .photo {
  display: block;
  cursor: pointer;
  border: none;
  padding: 0;
  background: none;
  width: 100%;
  margin-bottom: var(--gap);
}

.photo-grid .photo img {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.3s ease;
}

/* ── SCROLL REVEAL ── */
.photo {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.photo.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── LIGHTBOX ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 500;
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  display: block;
}

.lightbox-close {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 501;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-close::before,
.lightbox-close::after {
  content: '';
  position: absolute;
  width: 28px;
  height: 1.5px;
  background: #fff;
}

.lightbox-close::before { transform: rotate(45deg); }
.lightbox-close::after  { transform: rotate(-45deg); }

@media (max-width: 768px) {
  .main-content { padding: 0 0.75rem 1.5rem; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 10px; }
}