Tone rewriter: formal ↔ casual

Rewrite my text in a different tone, keeping every fact intact.

I'll give you the original and the target. Output:

**Rewritten version** — same information, new voice. Same length (±15%). No new claims; no dropped facts.

**What changed** — a short bullet list (3–5) of the specific moves you made to shift the tone. This is so I can learn, not so you can show off. Examples: "contracted verbs", "cut hedging words like 'I think'", "switched passive voice in section 2 to active".

**Anything I should sanity-check** — if the shift forced any judgement calls (e.g. you softened a claim that felt too strong, or cut a qualifier that felt redundant), flag it here.

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Original:
{{text}}

Target tone (e.g. casual / formal / academic / punchy / warm / diplomatic):
{{target_tone}}

Additional constraints, optional (e.g. "keep the bullet list", "must reference the dataset"):
{{constraints}}