Sitewide Mailchimp Signup Integration

The Campaign Monitor link that once captured newsletter sign-ups is now dead, so I’m switching the entire site to Mailchimp. I already have the Mailchimp embed code ready—no design work needed on the form itself—just clean implementation.

Here’s what I need:
• Replace every instance of the old subscription link with the Mailchimp embedded form. This applies to the home page, contact page, all blog articles, and any other template that previously linked to Campaign Monitor.
• Keep the form inline, not a pop-up or timed redirect, and style it so it blends seamlessly with existing fonts, colours, and button styles.
• Ensure the form is responsive and fully functional across modern browsers and common mobile breakpoints.
• Remove or disable any leftover Campaign Monitor assets or scripts so there are no console errors or broken calls.

Acceptance criteria:
1. Form appears and submits correctly on every public page.
2. Mobile, tablet, and desktop layouts remain intact after the change.
3. No references to Campaign Monitor remain in the codebase.

I can supply the embed snippet, access credentials, and a staging environment if preferred. Let me know your estimated turnaround and any questions you have about the current stack.