body{font-family:sans-serif;margin:0;padding:20px;background-color:#f0f0f0}button{padding:8px 15px;cursor:pointer}input{padding:8px;margin-bottom:10px;display:block;width:calc(100% - 16px)}label{display:block;margin-bottom:5px}.messageBox{margin-top:15px;padding:10px;border-radius:4px;text-align:center}.messageBox-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.messageBox-error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}