XF 1.4 How to create custom sites in Template's design?

[localhorst]

Dear,

I have a few custom sites as .php.

But how can I create a grid system, how can tables look like in XenForo?
How can I create titles in Template's design, and how buttons?

Are their just style sheets I had to add to the HTML-Tags like in Bootstrap? E.g. "<table class="xenforo xf-table">"?

Thank you!