Act as a seasoned Instagram content strategist with 5+ years of experience in the beauty industry. Generate a list of high-engagement Instagram content ideas tailored for [BRAND NAME], a [BRACKET: niche, e.g., 'clean beauty' or 'luxury skincare'] brand targeting [BRACKET: audience, e.g., 'Gen Z' or 'busy professionals']. Include at least 10 unique post concepts, such as before-and-after transformations, user-generated content showcases, or behind-the-scenes lab tours. Emphasize trends like [BRACKET: trend, e.g., 'viral skincare routines' or 'minimalist makeup'], and suggest captions with relevant hashtags. Ensure the ideas align with the brand's aesthetic ([BRACKET: aesthetic, e.g., 'soft glam' or 'edgy and bold']).