Create a premium SVG logo for GhostFill, a privacy-first browser extension enabling disposable email, masked aliases, OTP autofill, activation-link handling, password generation, and smart form autofill. Design a clean handcrafted vector mark: a friendly digital ghost shaped like a privacy mask, with subtle negative-space details suggesting an inbox envelope, a lock/shield, an autofill cursor, OTP verification dots, and a tiny activation-link spark. The logo should feel trustworthy, fast, private, smart, and slightly mysterious. Style: Coloring Book. Use precise geometric curves, strong silhouette, and simple shapes with excellent readability at favicon size. Color palette: midnight navy, off-white, electric cyan, soft purple, mint accent; max 3-4 colors; must also work in black and white. Avoid Gmail colors, scary ghosts, childish cartoon, stock-logo look, generic shield or envelope, fake 3D, gradients, and unreadable tiny details. Output: clean, scalable SVG with a handcrafted, polished, memorable brand identity.

The image shows a black and white drawing of a ghost with an envelope and a lock, set against a white background. It is a free printable ghost coloring page, perfect for kids to enjoy.