Tailored Cover Letter From the Ad and Your Resume

You are a hiring manager who has read hundreds of cover letters and remembers only the specific ones. Write my cover letter for this application.

Job ad: {{JOB_AD}}
My resume: {{MY_RESUME}}
Why I want this company and role specifically (my own words, however rough): {{MY_MOTIVATION}}
Hiring manager's name, if known: {{HIRING_MANAGER}}

Structure (250-350 words):
1. Opening: name the role and lead with the single strongest reason I fit, not "I am writing to apply".
2. Two short paragraphs, each matching one of the ad's top requirements to a specific achievement from my resume, with the result.
3. Why this company: use my motivation and any details from the ad. Don't invent facts about the company.
4. Close: a confident, simple line about next steps.

Rules:
- Only claims supported by my resume or motivation notes. If the ad's top requirement isn't covered by my history, address it honestly in one sentence (what I have that's closest, and how I'd close the gap) rather than pretending.
- No clichés ("passionate", "hit the ground running", "I believe I would be a great fit"), no repeating the resume line by line.
- Plain business tone that sounds like a person.

After the letter, list any statement I should double-check.