Prediction: Box Math

A challenge in two parts. PART 1 — fix the sizing: the .box in the boilerplate has width: 200px but renders 248px wide. Add the universal border-box rule at the top of the stylesheet so width means what it says. Keep the .box rule exactly as it is. PART 2 — space it out: give .box a margin of 1rem on all sides.

Difficulty: beginner