anchor.diff:  $grid-float-breakpoint-max: 0;
   $grid-gutter-width:         0;
   
  -// navbars
  +// navigation
   
   $navbar-height:              60px;
   $navbar-margin-bottom:       0;
  
positive.code: 
  $tooltip-opacity: $opacity-default;
  
  // border radius
  
  $border-radius-base:  0;
  $border-radius-large: 0;
  
negative.code: $opacity-focus:     .75;
  $opacity-selection: .25;
  
  // navigation
  
  $navbar-default-color:             $gray-dark;
  $navbar-default-bg:                $gray-lightest;
  