On my webpage, I have a drop-down menu, 3 text boxes, and a submit button. Currently, they are aligned to the left but I would like to align them in the center. I am using Bootstrap CSS in my code, but I am new to this field. Can someone please guide me on how to achieve this? Here is what I have tried:
<form action=page2.php method=GET>
<select class="form-control" name="select-val">
<option value="a1">A1</option>
<option value="a2">A2</option>
<option value="a3">A3</option>
<option value="a4">A4</option>
<option value="a5">A5</option>
<option value="a6">A6</option>
</select>
<br>
<input align='center' type = "text" class = "form-control" name = "sel_val" placeholder = 'Enter The Name'>
<br><br>
<input align='center' type = "text" class = "form-control" name = "start_date" placeholder = 'Start Date(YYYY-MM-DD)'>
<br>
<input align='center' type = "text" class = "form-control" name = "end_date" placeholder = 'End Date(YYYY-MM-DD)'>
<br>
<input align='center' class="btn" type="submit" value="select">
</form>
Thank you in advance.