Why use external CSS?
It keeps your website design and content separate.
You attach the single CSS file using the "link" tag.
You can make changes to all your web pages with just a few changes in a single CSS file.
Consider the following paths…
//ec-server/sikora/91540_0000_SI_A/index.html
//ec-server/sikora/91540_0000_SI_A/html/leaflet.html
Which file is at the deepest level?
Which file is closest to the root of directory?
How to attach a CSS template to index.html
Where is index.html located? In the root directory.
Which folders does the browser have to go into to get to style.css? CSS
What is the path from index.html to get to the stylesheet? css/style.css
In the header of index.html enter the following:-

How to attach a CSS template to leaflet.html
Where is leaflet.html located? In the html folder which is in the root directory.
Which folders does the browser have to go into to get to style.css? Up a directory to get to the root of directory then to the css folder then the file.
What is the path from leaflet.html to get to the stylesheet?
91540_0000_SI_A/css/style.css
../ Can be used instead of the root directory
And we get
../css/style.css
In the header of leaflet.html enter the following:-
