.container { background:white;padding:20px;border-radius:10px;box-shadow:0 0 10px rgba(0, 0, 0, 0.1);text-align:center;} h1 { margin-bottom:20px;} .form-group { margin-bottom:15px;text-align:left;} label { display:block;margin-bottom:5px;} input, select { width:100%;padding:8px;box-sizing:border-box;} button { padding:10px 20px;background-color:#007bff;color:white;border:none;border-radius:5px;cursor:pointer;} button:hover { background-color:#0056b3;} #result { margin-top:20px;font-size:1.2em;color:#333;}