Wise commanders choose their weapons before the battle begins. Editor’s Note: This article was originally published on RandomThoughtsInTraffic.com as part of an earlier exploration of CSS layout fundamentals. This revised and expanded StackNScroll edition develops the original lesson into a deeper study of layout strategy, with additional discussion of normal flow, Flexbox, Grid, responsive architecture, maintainability, and the decision-making process experienced developers use when selecting the appropriate layout system. Because this week’s theme is Mastering the Terrain: Layout as strategy, not guesswork, this edition focuses on understanding why layout systems exist and how they work together rather than treating them as isolated techniques. The result is a more comprehensive guide…