#lb-overlay{position:fixed;inset:0;background:rgba(0,0,0,.8);display:none;align-items:center;justify-content:center;z-index:99999}
#lb-overlay.show{display:flex}
#lb-overlay img{max-width:90vw;max-height:85vh;border-radius:8px;box-shadow:0 10px 30px rgba(0,0,0,.4)}
#lb-close{position:absolute;top:16px;right:20px;color:#fff;font-size:24px;cursor:pointer}
#lb-prev,#lb-next{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:28px;cursor:pointer;user-select:none;padding:12px}
#lb-prev{left:12px} #lb-next{right:12px}