WordPress uses a combination of PHP, HTML and CSS to render the appearance of a blog. If the CSS contains invalid code, the blog will fail to display as intended, as the Web browser won't understand the code used on the page.
The amount to buy depend on the issues that you want to fix. So let me know. If you have css issue also with your ssl installation, i am here fore you.
Fast and Extra Fast delivery available
If you want a complete report very detailed about how the issue was resolved, please buy the gig extra for $10.