I need some inspiration: #buildinpublic show me your best landing pages for a product that's not yet launched

What is your minimum screen size you design for these days? #buildinpublic #webdesign #mobilefirst

any recommendations for Figma-like, but simpler tools to design a beautiful landing page? asking as a back end guy who needs to build a modern and nice front end with limited design skills.
#BuildingInPublic #BuildInPublic