/* ---------- Galería / recorrido del sitio ---------- */
.tour-item {
  position: relative;
  border-radius: var(--radio);
  overflow: hidden;
  box-shadow: var(--sombra);
  cursor: pointer;
  aspect-ratio: 4/3;
  background: var(--superficie);
  border: none;
  padding: 0;
}
.tour-item img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform 0.4s ease; }
.tour-item:hover img { transform: scale(1.06); }

.lightbox {
  position: fixed; inset: 0;
  background: rgba(22, 55, 54, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 30px;
}
.lightbox--open { display: flex; }
.lightbox img { max-width: min(900px, 92vw); max-height: 86vh; border-radius: 10px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.lightbox-close {
  position: absolute; top: 24px; right: 30px;
  background: var(--blanco); color: var(--petroleo-oscuro);
  border: none; width: 44px; height: 44px; border-radius: 50%;
  font-size: 1.3rem; cursor: pointer;
}
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: var(--blanco); color: var(--petroleo-oscuro);
  border: none; width: 48px; height: 48px; border-radius: 50%;
  font-size: 1.2rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-nav--prev { left: 20px; }
.lightbox-nav--next { right: 20px; }
.lightbox-counter {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.5); color: var(--blanco);
  padding: 6px 16px; border-radius: 20px;
  font-size: 0.85rem; letter-spacing: 0.5px;
}