.ambiente-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 160px;
  gap: 8px;
}
.ambiente-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
}
.ambiente-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.ambiente-item:hover img { transform: scale(1.08); }
.ambiente-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.ambiente-item:nth-child(4) { grid-column: span 2; }
.ambiente-item:nth-child(5) { grid-row: span 2; }

.ambiente-item::after {
  content: '\002B';
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  color: var(--cream);
  background: rgba(10,10,11,0);
  opacity: 0;
  transition: all .3s ease;
}
.ambiente-item:hover::after {
  background: rgba(10,10,11,.35);
  opacity: 1;
}

/* Lightbox */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(6,6,7,.94);
  z-index: 300;
  display: none;
  align-items: center; justify-content: center;
  padding: 40px;
}
.lightbox.is-open { display: flex; }
.lightbox img {
  max-width: min(900px, 100%);
  max-height: 85vh;
  object-fit: contain;
  border: 1px solid var(--line);
}
.lightbox-close {
  position: absolute;
  top: 28px; right: 32px;
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--cream);
  border: 1px solid var(--line);
  padding: 10px 18px;
}
.lightbox-close:hover { border-color: var(--gold); color: var(--gold-soft); }

@media (max-width: 880px) {
  .ambiente-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 180px; }
  .ambiente-item:nth-child(1) { grid-column: span 2; grid-row: span 1; }
  .ambiente-item:nth-child(5) { grid-row: span 1; }
}