You now know what HTML is and how to create a properly-formatted HTML document. That said, if you look at the HTML pages thus far, you can't help but notice that they look a little plain. To make them more attractive (and responsive), you can use Cascading Style Sheets or CSS!
You will be able to:
- Identify the separation of content and presentation
- Explain the role of CSS
HTML lets you mark-up your content with semantic structure. It forms the skeleton of your web page. It would be great to be able to say, "Browser, when you see a p tag with id of my-name, make the first letter be huge!" Or, to get your readers' attention, you might say, "Browser, if you see any tag with a class of warning surround it with a red box!" HTML authors believe that creating marked-up documents and styling marked-up documents are entirely separate tasks. They see a difference between writing content (the data within the HTML document) and specifying presentation, the rules for displaying the rendered elements.
CSS, or "Cascading Style Sheets," tells you how to write rules that define how browsers will present HTML. Rules in CSS won't look like HTML and they usually live in a file apart from our HTML file.
CSS handles all of the ways you want to customize your content's look and feel from margins and colors, to column-based layout!
Web developers separate the content of our HTML pages from their presentation, which they style with CSS. By keeping the two separate, you not only utilize the best tools for each job, but you can change code for one without disturbing the code for the other.
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