STAC is a concept website for a collaborative productivity platform designed to replace fragmented workflows with a single, focused system. The site uses a calm, approachable visual language that balances clarity with personality. Hand-drawn illustrations add warmth and a human touch to the product story, helping soften complex ideas and make the platform feel more accessible. The design system combines soft shapes, generous spacing, and a restrained color palette to create a playful yet structured experience that supports focus, usability, and ease of navigation.