I am using Flask to create a chatbot. HTML to display, and a python script to run the application. However, for some reason the CSS is not being read by the HTML. I have followed this convention for my directory
So File, contains Application(Python script), templates(Folder) and static(Folder). templates contains HTML file and static contains file. This is the code I have used in the HTML file to reference the CSS file:

<link rel="stylesheet" href="styles.css">