Elwen

%li_style
  display: inline-block
.info__line__navigation ul li
  @extend %li_style
.social_media ul li
  @extend %li_style

@mixin position($position, $top, $right, $bottom, $left){
  position: $position;
  @if($top!=null){
    top: $top;
  }
  @if($right!=null){
    right: $right;
  }
  @if($bottom!=null){
    bottom: $bottom;
  }
  @if ($left!=null){
    left: $left;
  }
}

.block{
  @include position(relative, 20px, null, null, -45px);
}