The Grid Is Doing More Work Than You Think
A blank white page gives your eye nothing to hold onto. A faint grid gives every element an address.
Structure you can feel
Even when readers never consciously see the lines, alignment against them reads as intent. Misalignment reads as noise.
Two line weights are enough: a fine line for texture, a heavier one for rhythm.
CSS, not canvas
Repeating linear gradients render a full-page grid for free. No JavaScript, no repaint cost, crisp at any zoom.