$shadow-xs: 0 1px 3px rgba($grey-500, .12), 0 1px 2px rgba($grey-500, .24);
$shadow-sm: 0 3px 6px rgba($grey-500, .12), 0 2px 4px rgba($grey-500, .10);
$shadow-md: 0 10px 20px rgba($grey-500, .12), 0 3px 6px rgba($grey-500, .08);
$shadow-lg: 0 15px 25px rgba($grey-500, .12), 0 5px 10px rgba($grey-500, .05);
$shadow-xl: 0 20px 40px rgba($grey-500, .2);