Example usage of BEM style SASS

bem-example.scss

.block {
	background: $black;
	height: 500px;
  
	@media(min-width: $screen-lg-min) {
		height: 430px;
	}
	
	&__element {
		margin: 0 auto;
		padding: 105px 0 0 0;
		width: 195px;
    
		@media(min-width: $screen-sm-min) {
			display: inline-block;
			padding: 95px 0 0 0;
			width: 440px;
		}
    
    &--modifier {
      font-color: #efefef;
    }
  }
	
	&--block-modifier {
      font-color: #efefef;
			font-size: 12px;
    }
}