In the document form, modify the dark header backgrounds: 1. Change the dark background of the banner 'КОММЕРЧЕСКОЕ ПРЕДЛОЖЕНИЕ №' (on the left side above the grid) to a clean white background with black text, retaining the exact borders and text. 2. Change the dark background of the section header 'НАВИСАНИЕ СТОЛЕШНИЦЫ НАД МЕБЕЛЬНЫМИ ФАСАДАМИ' (in the right column) to a clean white background with black text, retaining the borders, text, and lines. Keep all other text, drawings, lines, tables, and existing modifications identical to the reference image.
