Html Guide
So you want to style your pets page, user shop or profile but don't know how. You've come to the right place. There are two things you need to learn. The first is HTML and the second is CSS.
HTML stands for Hyper Text Markup Language. That's a fancy way of saying that it communicates to the browser (i.e what you are viewing the site with) the structure of the web page. CSS stands for Cascading Style Sheet. CSS communicates to the browser visually what the page should look like.
A more specific example of how the two work. Say you want to create a list, but you want the text to be blue. First you would create a list using the HTML list element, then you would color it blue with CSS. Here is a list below that goes into the different areas in more detail. If you've never coded a web page before, it would be beneficial to go through each item one by one. Otherwise if you just need to reference a specific element or style direction you can jump around to find what you're looking for.
HTML Basics CSS Basics