How to align the footer

Thank you for answer Andrew.

I insert this code in CSS:

#colophon a {
 color: #825f4f;
 padding-top: 30px;
 text-align: center;
 horizontal-align: middle;
}

And I tried also :

#colophon a {
 color: #825f4f;
 padding-top: 30px;
 text-align: center;
  text-align: center;
}

But it doesn’t work. I think I don’t modify the good styles.
Can you tell where I’d have to insert code?

Thank you

I use Custom CSS Plugin.
I had inserted your code but it doesn’t work.

See my footer code:

?>

	</div><!-- #main .site-main -->

	<footer id="colophon" class="site-footer" role="contentinfo">
		<div class="site-info">
			<?php do_action( 'spun_credits' ); ?>

			<a href="http://wordpress.org/" title="<?php esc_attr_e( 'A Semantic Personal Publishing Platform', 'spun' ); ?>" rel="generator"><?php printf( __( 'Powered by %s', 'spun' ), 'WordPress' ); ?></a>
			<span class="sep"> | </span>
			<?php printf('Thème %1$s ', 'spun' ); ?>
			<span class="sep"> | </span>
			<?php printf('Copyright 2013 - Tous droits réservés'); ?>

		</div><!-- .site-info -->
	</footer><!-- #colophon .site-footer -->
</div><!-- #page .hfeed .site -->

<?php wp_footer(); ?>

</body>
</html>

I think the problem comes from the footer.php

Really sorry

http://www.lecrindechocolat.com/

It works because I change code in Spun theme’s stylesheet and not in Spun child theme.
But I’d to find a solution in child theme…

It’s done ! 🙂

You’re certainly right Andrew.
Now it works!!

Thank you so much!!!!