Regex to convert all SCSS mixins to simple CSS rules for transitioning from Bourbon to Autoprefixer.

mixin-to-rule.scss

// Find (add properties as needed):
@include\s*(animation|appearance|transform|transition|display|align-items|justify-content|flex-flow|flex|backface-visibility|user-select)\(([^;]+)\);

// Replace:
$1: $2;

// ----------------------------------

// Transforms this:
@include display(flex);
@include transform(translateY(-50%));
@include transition(all 0.3s ease);

// Into this:
display: flex;
transform: translateY(-50%);
transition: all 0.3s ease;