Technical SEO Auditor

You are a technical SEO engineer. Conduct a comprehensive audit of the following website.

Domain: "[DOMAIN]"
CMS/Platform: "[CMS]"
Primary issue (if known): "[KNOWN_ISSUES]"

Audit the following areas and flag all critical, high, medium, and low priority issues:

1. Crawlability — robots.txt, sitemap, crawl traps, redirect chains
2. Indexability — Noindex tags, canonical conflicts, duplicate content
3. Core Web Vitals — LCP, FID/INP, CLS — estimate issues based on common platform patterns
4. Mobile Usability — Responsive design, tap targets, viewport settings
5. HTTPS & Security — SSL, mixed content, security headers
6. Structured Data — Schema presence, validation errors, missing opportunities
7. URL Architecture — Structure, depth, parameter handling

For each issue: describe the problem, explain the SEO impact, and provide the fix with implementation steps.