Why learning HTML and CSS makes sense.
Web design apps like Dreamweaver are fine, but if you want to be able to build modern responsive HTML5 based websites, then these apps will get in the way of you learning (because you have to learn the app on top of the code) … and will actually slow you down!
Learning to build your web sites using HTML will give you far better control over the process, and ultimately your web sites. On top of that, you will have a far deeper understanding of the web, and as a result you will create better websites quicker
More learn about html and css on www.w3schools.com