*{box-sizing:border-box}html,body{overflow-x:hidden;height:100%;margin:0;padding:0;font-family:Arial,sans-serif}h1{text-align:center;margin-bottom:20px}label{display:block;margin-bottom:5px}input,select,textarea{width:100%;padding:10px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box;margin-bottom:15px}button{background-color:#4caf50;border:none;color:#fff;padding:10px 20px;text-align:center;text-decoration:none;display:inline-block;font-size:16px;margin-top:10px;margin-right:10px;cursor:pointer;border-radius:4px}button:hover{background-color:#45a049}#expense-form{border:1px solid #ccc;padding:20px;border-radius:4px}