Wrangling Look & Feel
Getting your design to look exactly as desired is painstaking experience. Unless you are starting from a raw .html file and building up from there (Yowza! You are talented) then you are building on top of a platform of some kind. And, this can have some interesting limitations.
You need to do lots of research and keep experimenting. Eventually you will get closer and closer to what you are looking for.
Alternatively, think inside of the box, from the platform you are using what are well defined ways to create your look and feel? Are any of those suitable? Can they be easily customized to give them a little differentiation.
No matter which path you choose: Don’t give up! Keep working at it and what seemed impossible the first time you tried it just gets easier and easier.