In most cases the form has no storage destination. Squarespace requires at least one — a mailing list, an email address, Google Drive, Mailchimp, Zapier or the Contacts panel — and without one, visitors physically cannot submit.

In most cases your CSS is fine and the selector is wrong. Squarespace 7.1 renames and restructures classes between sections, and Fluid Engine writes inline styles that beat anything in your stylesheet. Check the selector first with your browser inspector, then check specificity, then check for a syntax error higher up in the panel — a single missing brace silently kills every rule below it.

A genuine Squarespace platform outage is rare. In almost every case the problem is one of four things — your domain or DNS, your billing or visibility settings, custom code you or someone else added, or your own browser.