Unsubscribe HTML rendering wrong on mobile

Hi Community!

I'm having issues with the way the Marketo unsubscribe link is rendering on mobile. I want it to be centered, but it is only appearing left-justified. 

I have tried editing the style of the p tag, creating a table and editing the <td> style....but it's still not centering on mobile.

Any ideas? Thanks so much!!

For reference, here is what I'm currently using within the Email setting tab: 

<p style="text-align: center; font-family: 'Gill Sans', 'Gill Sans MT', 'Myriad Pro', 'DejaVu Sans Condensed', Helvetica, Arial, sans-serif; font-size: 11px; color: #b1b1b1;">This email was intended for <a style="color: #b1b1b1;" >{{lead.Email Address}}</a>, but feel free to <a style="color: #b1b1b1;" href="%mkt_opt_out_prefix%UnsubscribePage.html?mkt_unsubscribe=1&mkt_tok=##MKT_TOK##">unsubscribe</a> at any time<br/><br/></p>