#121212. The proven perfect dark UI color. Spotify taught the world that this gray is better than pure black. Dark enough to feel immersive. Light enough that overlaid surfaces (#1A1A1A) are visible. The surface stacking from there to #242424 creates systematic depth without a single shadow trick.

Outfit at weight 800 for headings. Massive, confident, like an album title or a billboard. The geometric letterforms at -0.03em heading tracking feel bold without being aggressive. The rounded terminals match the green-on-black energy. At 1.1 heading line height, those 800-weight headlines dominate the page exactly the way they should.

Body text at weight 400 with 1.6 line height stays clean and scannable. Outfit has personality at bold weight and disappears at regular weight. That range makes it perfect for a content-forward system where headings are landmarks and body text is infrastructure. Space Mono for code and metadata adds monospaced utility when you need it.

Heavy dark shadows. 4px at 24px spread in pure black at 50% opacity. No colored shadows, no glows, no accent tinting. The depth system is brutally simple: dark background, slightly lighter surface, pure black shadows. The large shadow drops to 25px at 60px for dramatic elevation. Darken hover effects shift surfaces to the next-lighter level in the stacking system. Smooth motion speed means interactions feel responsive but never bouncy. Active scale at 0.98 gives subtle press feedback. Hierarchy comes from surface stacking, not shadow complexity. A billion users. The design has to work everywhere.