.scanner-frame{width:100%;height:100%;position:relative;border:2px solid #00ff99;border-radius:8px;box-sizing:border-box}.scanner-line{position:absolute;width:100%;height:3px;background:linear-gradient(to right,transparent,#00ff99,transparent);animation:scan 2s linear infinite}@keyframes scan{0%{top:0;opacity:.3}50%{opacity:1}to{top:100%;opacity:.3}}