problem with addresses in css

[UnknownPlayer]

When i use:

<link href="styles/styles.css" rel="stylesheet" type="text/css" />

my addresses like index.php works, but address like /post/ does not work :S

i mean css do not works on /post/ in this way

 

When i use:

<link href="../styles/styles.css" rel="stylesheet" type="text/css" />

then address like /post/ work, but address like index.php does not work :S

i mean css do not works on index.php in this way

 

This is my .htaccess code:

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^post/([0-9]+)$ post.php?pid=$1 [L]

 

How can i find solution to both works ? :S

 

[requinix]

It's quite simple, actually.

/styles/styles.css

[UnknownPlayer]

In that way, both does not work :S

I mean css does not work in /post/ and in index.php

[UnknownPlayer]

Please help me ?