Newsletter Styling

I have an HTML file which is the newsletter, an I want to keep it one file. as per my client requirements. 1- I have multiple sections in the newsletter, each section has a color, I want to have the "show more" link in the same color of that section, section code yellow, always "show more"and links in that section should be yellow. 2- I want to have a light grey background for all content, except for separators, as per attached pdf keeping in mind that the total width is 600px of the newsletter, but the grey background should be larger than the content 3- I want to fix the spaces between images when they are in Grid form, please check also when minimizing the screen, so the spaces will follow the responsive design, it is responsive already. 4 I have some design elements (patterns) I want to apply for the design, so an artistic touch will help, patterns attached. 5 The accordion always with the first section open, I want them all to be closed and add an arrow before the sections name and have the link courser so it indicates that "this is to open thing...." 6 any extra enhancements/suggestions are welcome, after approval. I need to deliver this to the client in less than 24 hours Thanks a Lot Tekelo