this is very late but i hope i can help also! i don't know a ton about subeta, but i do know about coding subeta profiles and just finished my own! what spacemage said about adding the CSS in the style and using imgur i will definitely echo. i use imgur for all my image hosting. as far as the rest, it sounds like you may be going about it a little backwards in that you coded a full profile without touching subeta and now want to add in the subeta elements. because of how subeta works, unfortunately you cannot just create new ids & classes and then redirect subeta's content inside it, unless you want to manually add each element by hand - if you look at my profile you can see i did this with my pet links, having hidden the pet section on my profile and just relinking them in the main text box. but for the already existing boxes like the HA section, you have to specifically target the pre-existing ids & classes and modify them with css to move them around.

as a very basic example, the navigation on my current profile is just the exact already existing navigation bar subeta has, i've just used css to target the already existing navigation id and then move it down. a more complex example is the HA section, where i have changed the color, resized and moved it, added a scroll, added effects, etc. but i've had to do all of that just targeting what subeta already gives us, not with adding anything additional because you can't add anything additional in those fields, if that makes sense.

it's complicated to explain, but to give a better picture, if i were to take all of the coding off of my profile right now, there would be 1 column of 4 widgets - HA, textbox, leave a comment, and comments. if i were to ever re-order them or remove one, it would completely ruin my coding due to how selecting the content boxes on subeta works.

essentially, you should start with a subeta profile that has no code on it and just the modules you want to show, then move them around from there, rather than coding a whole profile outside of subeta and then trying to fit things into it, because you probably won't be able to! i don't know how webstorm works - i do all my coding either right here in the subeta dashboard editor (that's where you will add in your CSS, go to personal > dashboard > profile) and then just refresh every time i add something new to see how it changes - but i have used brackets/notepad++/etc. in the past, and i don't know that you can open a site you don't host yourself to try and create a profile that way.

if you can show better examples of what you currently have as far as code goes (and a preview of what that looks like), i can try to help more in-depth and in less vague technical terms!