Styles should not rely on IDs

[goblindegook]

Stylesheet should use classes, not IDs. Add classes to templates wherever necessary.

[xipasduarte]

I've created a pull request with the change from LESS to SCSS, when resolved I will change the ID based styling to a class based, wherever justified.
Also, I've started the template class revision.

[goblindegook]

Thanks for the hand! Much appreciated!