body{font-family:Arial,sans-serif;background-color:#f0f4f8;display:flex;justify-content:center;align-items:center;height:100vh;margin:0}.container{background-color:#fff;padding:20px 30px;border-radius:10px;box-shadow:0 0 10px #0000001a;width:480px}.header{background-color:#4caf50;color:#fff;padding:15px;border-radius:10px 10px 0 0;text-align:center}label{display:block;margin:10px 0 5px;font-weight:700;color:#06c;font-size:14px}input[type=text],input[type=number]{width:100%;padding:8px;margin:5px 0 20px;border:1px solid #dddddd;border-radius:5px}.result-box{font-weight:700;color:#06c;text-align:left;margin:10px 0;padding:10px;border:1px solid #dddddd;border-radius:5px;background-color:#f0f4f8}.highlighted-box{font-weight:700;color:#06c;text-align:left;margin:10px 0;padding:20px;border:1px solid #dddddd;border-radius:5px;background-color:#ffc;font-size:18px}.large-label{font-size:16px}button{width:100%;padding:10px;background-color:#06c;color:#fff;border:none;border-radius:5px;font-size:16px;cursor:pointer;margin-top:10px}button:hover{background-color:#004c99}