Lucia opened this place in 1978. She cooked every night for fifty years, making the same dishes: spaghetti carbonara, eggplant parmigiana, veal saltimbocca, fresh lasagna. She did not change a single recipe in all that time. Her grandson Anthony runs the kitchen now, using the same recipes with the same care.
This second flush-to-edge paragraph confirms the rule fires on every body paragraph that touches the viewport, not just one. The rendered width should be the full viewport, with text starting essentially at x=0.
This paragraph sits inside a max-width container that's centered and has 32px horizontal padding. It does not touch the viewport edges and should not trigger the rule.
Banner headers commonly bleed to viewport edges with their own internal layout. The rule excludes <header> descendants.
This paragraph sits in a full-bleed section that has its own background-color set (intentional design move). The rule excludes paragraphs whose element has its own background-color.
Short label.
The flag cases above (rendered outside this grid) demonstrate the failure. The pass cases here show acceptable patterns. The rule gates aggressively to avoid false positives: it only flags <p> and <li> with >40 chars whose width spans more than 50% of the viewport AND whose rect.left or rect.right is within 16px of a viewport edge AND which are not inside nav/header AND which have no own background-color AND which are in normal flow (not position:fixed/absolute).