Responsive implementation with HTML and CSS.

It was my second challenge and actually quite a lot of time was spended to gues the siyes of margin/padding/font-size etc. So on some step I decided to stop this detalising and concentrate on important things. So it can be, that solution not completely as a giving issue. But I did my best. Also wanted to do it as simple as possible. Did I reach my goal? What could be better?

Thank you for any reply! Anna