.lb-modal{
  position:fixed;inset:0;z-index:99999;background:rgba(0,0,0,.88);
  display:none;align-items:center;justify-content:center;padding:20px;
}
.lb-modal.open{display:flex}
.lb-img{max-width:min(92vw,1200px);max-height:86vh;border-radius:10px;box-shadow:0 20px 50px rgba(0,0,0,.45)}
.lb-close{
  position:fixed;top:16px;left:16px;border:none;background:#fff;color:#111827;
  width:42px;height:42px;border-radius:999px;font-size:24px;cursor:pointer;z-index:100000;
}