Swiss-modernist editorial poster printed on warm, slightly dirty off-white paper. Build the entire composition around a visible modular grid made from thin electric-blue lines. Place a large rectangular grid panel slightly inset from the outer page margins. Divide it into four equal columns and six horizontal modules. Allow selected modules to merge into larger geometric blocks while keeping the underlying grid structure visible. Fill the upper-right area with a large solid cobalt-blue rectangle spanning approximately two columns and two rows. Add another tall cobalt-blue block in the lower-left corner, spanning one column and two rows. Keep every other module unfilled so the textured off-white paper remains visible. Set the exact main title: “Grid Systems” Use an extremely large, heavy black neo-grotesque sans-serif typeface similar to classic Swiss editorial typography. Align the title to the left grid edge. Place “Grid” across the upper-middle rows and “Systems” directly beneath it, extending almost across the full poster width. Allow the letters to touch or visually intersect the blue grid lines.