Update Email & Add Page

I need a quick refresh of an existing HTML email and the creation of one new standalone page. For the email, I’ll provide the current code and assets; I simply want it modernised—cleaner styling, fully responsive, and tested across major clients (Outlook, Gmail, Apple Mail, mobile apps)... (Budget: $30 - $250 USD, Jobs: CSS, Email Marketing, HTML, JavaScript, Vue.js, Web Design, Web Development, Website Design)