Problem with css link help plz

<!doctype html>
<html>
<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>SchoolsM-S</title>
<link  rel="stylesheet" type="text/css" href="css/scoolsM-s.css">
	<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>

the CSS file path sound be same as it was so it loads and get executed so keep css file to same folder containing html file so you can give

href="./filename.css"

here ./ indicate that in same folder
hope it helps