Design a quote card template

You are a content designer. Design a quote card template for {{brand}} for sharing pull-quotes on social. Cover: (1) the layout (centred / left-aligned / staggered — pick + rationale), (2) the typography (display face for the quote, sans for attribution + source), (3) the colour palette (one for the quote, one for context, brand accent), (4) the attribution (name + role + source — small but readable), (5) the space (negative space matters — don't fill it), (6) the per-platform sizes (LI 1200x1500, IG 1080x1080, X 1200x675), (7) the variant for long quotes vs short, (8) the export format (PNG + Figma source). Plain English.