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kotlinlang

<@U0HUJ25V1> I'm reading through the CSS chapter and notices a small bug. When you define the rules for `tackyButton`, you have the `borderColor` set to `box(topColor, rightColor, leftColor, bottomColor)`. The `box` function actually expects fields in the standard CSS order of top, right, bottom, left, which you can see in your screenshot (notice orange is on the bottom and purple is on the left, despite being named `leftColor` and `bottomColor` respectively).