Before you reference similar questions: I did actually do research yet no post solved my issue.
I literally have the most basic code you can imagine yet one of the most basic things won't work. The CSS file is interpreted as text/html while I need it to be a read as a stylesheet. This is due to my .htaccess file even though I explicitly added the AddType thing.
Here's my HTML:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>EASY-Online</title>
<link href="./css/bootstrap.min.css" type="text/css"/>
</head>
<body>
<div class="alert alert-warning">
test
</div>
</body>
</html>
My htaccess:
RewriteEngine On
RewriteBase /
AddType text/css .css
RewriteCond %(REQUEST_FILENAME} !-d
RewriteCond %(REQUEST_FILENAME} !-f
RewriteCond %(REQUEST_FILENAME} !-l
RewriteRule ^(.*)$ index.php?url=$1 [QSA,L,T=text/css]
After some more research I found this to fix my issue:
RewriteCond %{REQUEST_URI} !\.(?:css|js|jpe?g|gif|png)$ [NC]
I added this directly above the RewriteRule. Apparently this allows the described extentions to be reachable by navigating to them instead of redirecting.