Getting back into the swing of things

The first thing I had trouble with was the background I thought it was repeating or something but it's not you take the background image then add a background color.

The other thing was the margin-left :auto I almost forgot about that, I was thinking about

Last thing was responsiveness It doesn't work on a samsung flip not sure what to do I want to use the cal for the text and width not sure how to do that so I get confused everytime look it up