accordions, sticky nav, good css stuff
https://www.mybilliedesigns.com/blog/customize-your-squarespace-site-with-css-part-3
CSS code backup
/*Accordion Menu */ .markdown-block { h3{ padding:20px; margin:0px; background-color:grey; border: 1px solid black; } p{ background-color:blue; margin:0px; padding:20px 40px; } }