What is proper way to Center a Label element using CSS in a asp.net .master page

I am trying to put together a asp.net webforms website for a church fellowship organization and I am having to learn to work with building this website from scratch using Visual Studio Express 2013 for Web's Empty asp.net Website Template and since I have never done websites before, I am having to search through the Internet for examples, most of my programming experience comes from C# and I just don't seem to be able to find a solution for this.

Anyway my problem is that I can't figure out how to Center a asp.net Label on the SiteMasterPage.master

<div class="header1">
  <br />
  <br />
  <h1 class="auto-style1">Calvary Christian FellowshipGA, Inc.</h1>
  <div style="align-items: center">
    <asp:Label ID="Label1" runat="server" CssClass="ccfgaLabel" ForeColor="#0066FF" Text="Calvary Christian FellowshipGA, Inc."></asp:Label>
  </div>
  <br />
  <br />
  <p>
    Informational Text here.
  </p>
  <br />
  <p>
    More Informational Text here.
  </p>
</div>

I've tried a couple things the above being the latest, the only thing I've found that actually worked was to use:

<center>
  MY Label
</center>

the only issue with this use of 'center' is that I get the 'center' is deprecated warning. I would like to be able to do this correctly, could someone give me some suggestions how to get this done.

I tried the following from a .css file.

.ccfgaLabel
{
    display: inline-block; 
    width: 230px;
    /*margin-left: 10px;*/
    margin-left: auto;
    margin-right: auto;
}

The only thing that seemed to work in it were the

width: 230px;

and

margin-left: 10px;

I would like to set this up inside the css file since this is all gonna be on a MasterPage.

*Edit: I should point out that the only reason I decided to try a Label was that I wanted a Bordered and Shaded, Box aspect around the Text and I hadn't yet tried to see if bordering and shading was possible just around specific Text centered in the middle of the page.

Solution

So, since the comment worked, here's the posted answer.

Instead of your align-items that you set on the wrapper div, use the text-align property, that is used to specify the alignment of inline content:

<div style="text-align: center">
  <asp:Label ID="Label1" runat="server" CssClass="ccfgaLabel" ForeColor="#0066FF" Text="Calvary Christian FellowshipGA, Inc."></asp:Label>
</div>

Though I recommend you not to set it as an inline style. Rather, give the div an id or a class and leave the property on the stylesheet.

MDN text-align docs