CSS: @import vs.
91331
Difference between @import and link in CSS
116867
@import vs link
24052
Use 'import module' or 'from module import'?
94464
How to Override CSS for a core module?
114265
Is there a workaround to make CSS classes with names that start with numbers valid?
40298
Import regular CSS file in SCSS file?
2803
Programming scripts to create and modify stylesheets: problems with contexts
79255
@import in @if statement in Sass
4050
Clarification on the use of @{} with table headings
36759
Site Assets vs. Style Library
16997
Browsers' default CSS stylesheets
38134
How to apply !important using .css()?
59084
Which Details Are Required For Style.css File Header?
73901
CSS Files in _Layouts or Document Library?
135723
Why does changing a CSS class name break the styles?
64385
SASS / SCSS @extend rule selectors
66431
What is the difference between id and class in CSS, and when should I use them?