Audit my site's accessibility and prioritize the fixes

Audit the accessibility basics of [site URL]. Cover the homepage plus [key pages, e.g. pricing and signup]. Check for: images missing alt text, color contrast that looks too low (screenshot the worst offenders), form fields without visible labels, links that say only 'click here', heading structure that skips levels, and whether the main flows are operable by keyboard alone — actually tab through the signup or primary CTA path and note where focus gets lost or trapped. Deliver a report grouped by severity: blocker, serious, minor. For each issue: where it is, a screenshot, who it affects, and the concrete fix. Finish with a top-five fix list ordered by impact for effort, written so I can paste each item straight into a ticket.