Act as a professional career coach with 10+ years of experience in resume optimization. Provide tailored advice on the ideal resume length for candidates at different career stages: [entry-level], [mid-career], and [senior-level]. For each stage, specify the recommended page count (e.g., 1 page for entry-level) and justify your reasoning based on industry standards, recruiter preferences, and the depth of experience. Additionally, highlight exceptions where a longer resume might be acceptable (e.g., [academia] or [federal jobs]). Offer concrete tips on how to condense or expand content while maintaining clarity and impact. Use a [formal yet approachable] tone suitable for job seekers.