Example of SASS Module

_module.scss

.module { // Uses Chris Coyier's SASS style guide
  
  // Extends
  @extends %module; 
  
  // Native styles
  background-color: lightpink;
  
  // Includes (mixins and whatnot)
  @include transition(all 0.3s ease-out);
  
  // Nested Selectors
  h3 {
    
    // Same pattern, maximum two levels
    
    a{
      
      // Don't go deeper than this.
      // Seperate out into new module
      
    }
    
  }
  
  @include bp(medium) {
    // Breakpoints
  }
  
}

// Related styles that for some reason must be seperated out
.related {
  // Same format as above
}

Add breakpoints to the bottom of the module.