CSS should be valid:

   
@Rule Settings
After @Rule insert:
Style Rule Settings
After selector(s) insert:
After open-brace insert:
Before close-brace insert:
After close-brace insert:
Indent Sub-Rules With:
Style Property Settings
Before property names insert:
Before colon insert:
After colon insert:
After semicolon insert:
Alphabetizing Feature Warning: The features below change the order of elements and therefore may alter which styles prevail, during style conflict resolution (cascading).
Alphabetize @Rules
Alphabetize Style Rules
Alphabetize Properties
De-Capitalization Feature
Convert Everything to Lowercase
Convert Only Property Names to Lowercase
Don't Alter Case