px vs rem vs em vs %

This is where people overthink. Here’s the real-world rule set. 🔹 Use px for: ✔ Borders✔ Shadows✔ Small offsets✔ Hairline precision border-radius: 6px; box-shadow: 0 1px 4px rgba(0,0,0,.2); px = physical precision 🔹 Use rem for: ✔ Font sizes✔ ...