What I want on my website is an interactive line graph and an interactive US map so that when you hover your cursor over the map, data from the state appears. These are easy enough to create as there are multiple sources online to create it. But I keep getting conflicting information about whether I can insert this code into my WordPress site. I am told there is a difference with CSS and HTML, and that WordPress uses CSS but blocks some code from HTML. Any suggestions on how I handle this? The graph and the map will each be on its own page.