body{text-align:center;margin-top:50px;font-family:Arial,sans-serif}#big{font-size:72px;font-weight:700}button{cursor:pointer;margin:5px;padding:10px 20px;font-size:20px}.neg{color:red}#hist{text-align:left;width:300px;margin:20px auto}.error{color:red;max-width:300px;margin:10px auto}