.lb.hidden { display: none; }
body.lb-open { overflow: hidden; }

.lb { position: fixed; inset: 0; z-index: 9999; }
.lb__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.75); }

.lb__dialog {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  width: min(50vw, 1100px);
  max-width: 50vw;
  max-height: 85vh;
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  grid-template-rows: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px;
  background: rgba(20,20,20,0.92);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.lb__img {
  grid-column: 1 / 4;
  grid-row: 1 / 3;
  width: 100%;
  height: auto;
  max-height: 75vh;
  object-fit: contain;
  border-radius: 8px;
  background: #111;
}

.lb__caption {
  grid-column: 1 / 4;
  grid-row: 3;
  color: #ddd;
  font: 14px/1.3 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  text-align: center;
  opacity: 0.9;
}

.lb__btn {
  position: absolute;
  border: 0;
  color: #fff;
  background: rgba(0,0,0,0.45);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  display: grid;
  place-items: center;
  font-size: 28px;
}

.lb__btn--close { right: 12px; top: 12px; font-size: 30px; }
.lb__btn--fav { left: 12px; top: 12px; font-size: 26px; }
.lb__btn--fav.is-active { color: #ffc107; }
.lb__btn--prev { left: 12px; top: 50%; transform: translateY(-50%); }
.lb__btn--next { right: 12px; top: 50%; transform: translateY(-50%); }

@media (max-width: 900px) {
  .lb__dialog { width: 92vw; max-width: 92vw; }
}