#qr-input{width:100%;min-height:80px;font-size:14px;padding:8px;border:1px solid #ddd;border-radius:4px;resize:vertical;box-sizing:border-box;}
#qr-canvas{display:block;margin:0 auto;max-width:100%;image-rendering:pixelated;}
#qr-info{margin-top:10px;text-align:center;color:#666;font-size:13px;}