I saw the below head section in a page and I don't understand the purpose of the ./ before the stylesheet call. I checked the directory for the site and the stylesheet is in the same directory as the index page.
<head>
<meta charset="utf-8">
<title>Site Title</title>
<link rel="stylesheet" type="text/css" href="./styles.css">
</head>
.refers to the current directory (that the HTML page is in) and./styles.cssrefers to a file calledstyles.cssin the current directory. See here for more info https://stackoverflow.com/a/24340516/8595398