RAIL20 OG image - 3 variant

Style Nillion (palette sama: blue #0021F5 + lime #9DFF20). Title "RAIL20", tagline "Private payments for onchain agents". No logo.

Variant A - Dark (match landing hero)

Navy gradient + grid + lime accent. Paling nyambung sama landing page lo sekarang.

Variant B - Light (kontras, stand out di feed)

Background terang + lime bar kiri. Beda dari mayoritas crypto OG yang gelap = lebih nonjol di timeline.

Variant C - Centered dark (paling minimalis, mirip Nillion)

Center-aligned, gradient text, garis accent. Paling deket ke gaya Nillion.