I'm trying to load a background image with a "before" tag into a list to create a checkmark image at the back of the list, but the images aren't showing up. What is the problem? Here is the code:
.list1 li:before {
content: '';
background: url('../img/Без\ названия.png') 0 0 no-repeat;
width: 20px;
height: 20px;
<!DOCTYPE html>
<html lang="ru">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="css/style.css">
<title>Document</title>
</head>
<body>
<div class="container">
<div class="stylize">
стилизируй с помощью псевдоклассов и псевдоэлементов
</div>
<div class="mainlist">
<ul class="list1">
<li>Put on this page information about your product</li>
<li>A detailed description of your product</li>
<li>Tell us about the advantage and merits</li>
<li>associate the page with the payment system</li>
</ul>
<ul class="list2"></ul>
</div>
</div>
</body>
</html>
In theory, the list should be marked with checkmarks, or rather with images that I uploaded using the "background url", but no icons appear