body{font-family:Arial;background:#f2f2f2}
.container{max-width:1000px;margin:auto;background:#fff;padding:20px}
input,select,button{width:100%;margin-bottom:10px;padding:8px}
button{background:#000;color:#fff;border:none;cursor:pointer}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
#qr svg{width:100%}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}
.gallery img{width:100%;border:1px solid #ddd}
.error{color:red}