I'm trying to get the font on a mobile site increased in size, but no matter what I do, nothing seems to work.

I've tried font-size (doesn't work in opera mini, neither px, em or small, medium, large values), and doesn't appear to work on the iphone.

I've tried the text-size-adjust property, but again, whatever value I use, nothing seems to make any difference.

Is there any hidden trick to this or is there something plainly obvious that I'm missing?

I've checked over the CSS file, and there's no font size or font properties/values prior to or after the following:

p
{margin:auto;
margin-top:10px;
margin-bottom:10px;
width:85%;
text-align:center;
font-family: Arial, sans-serif;
font-size: 1.4em;
line-height:1.7em;}