Bulleted and numbered lists don't indent

I tried the css suggested in other topics for the bulleted list.

#main-content ul li {
margin-left: 25px;
}

A couple examples, but I use them on several other pages and posts as well and would like all of them to indent like a normal bulleted list.
Bulleted list: https://www.oxycise.com/breathing-tips/
Numbered list: https://www.oxycise.com/body-positive-summer/

Thank you for any suggestions!