Answers for "get /static/style.css http/1.1" 404"

GET /style.css HTTP/1.1" 404

<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/skel.css') }}" />
<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/style.css') }}" />
<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/style-large.css') }}" />
<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/style-xlarge.css') }}" />