I am writing rewrite rules in nginx for clean URLs.

Following is the rule:

location / {
if (!-e $request_filename) {
rewrite ^/post\/(.*)\/(.*)\/(.*)$ /post.php?a=$1&b=$2&c=$3 last;
}
}

Everytime I hit mydomain.com/post/123/456/abc-def it renders
mydomain.com/post.php?a=123&b=456&c=abc-def

Now the regex is right and php is rendered properly. But it is screwing
up my css.
The nav bar is garbled and images are not seen.
What could be the problem?
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