Problem with font family in headlines

I tryied to change font in my onion theme so I edit css as:

font-family:"Lucida Sans Unicode",Verdana;

and it's working but only for content. Headlines are still written in basic font. I managed to change font in title of article by editing theloop.php

	while (have_posts()) : the_post(); ?>
		<div class='one-post'>
			<div id="post-<?php the_ID(); ?>" <?php post_class("post-caption"); ?>>
			<?php  //Title
			if (!is_single()&&!is_page()) { ?>
				<h2><a href="<?php the_permalink(); ?>" title="<?php printf( $SMTheme->_( 'permalink' ), the_title_attribute( 'echo=0' ) ); ?>" class='post_ttl'><font face="Verdana"><?php the_title(); ?></font></a></h2>
			<?php } else { ?>
				<h1><font face="Verdana"><?php the_title(); ?></font></h1>
			<?php } 
			

But h1 h2 etc. in content are still not verdana.

Coul you help me please?

You have also change the file index.css, line number 26:

font: 12px/18px "Lucida Grande","Lucida Sans Unicode",Helvetica,Arial,Verdana,sans-serif;

I dont ha

I dont have index.css i got only "style.css" and i have changed all font there :(