h4{color:#333}.calculator{padding:20px}label{display:block;margin:10px 0 5px;font-weight:700}input,select{width:100%;padding:8px;margin-bottom:10px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box}button{display:block;width:100%;padding:10px;background-color:#007BFF;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:16px}button:hover{background-color:#0056b3}#calorie-result{display:none;margin-top:20px;padding:10px;background-color:#e9ecef;border-radius:4px}