.lb {position:fixed; inset:0; display:grid; place-items:center; background:rgba(0,0,0,.65); z-index: 1000;}
  .lb img {max-width:92vw; max-height:92vh; border-radius:8px; background:#111}
  .lb[hidden]{display:none}
  body.lb-no-scroll{overflow:hidden}