.reader{font-size:1rem}.reader .sweep{position:relative;margin:20px;padding:12px;width:300px;font-size:1.125rem;cursor:pointer;color:#fff;background:#42b983;border:1px solid #42b983;overflow:hidden}.reader .sweep input{position:absolute;font-size:6.25rem;opacity:0}.reader .result{box-sizing:border-box;padding:10px;border:1px solid grey;border-radius:8px;font-size:1rem}.reader .canvas{display:none;box-sizing:border-box;position:fixed;top:0;right:0;bottom:0;left:0;width:100vw;height:100vh}