Hardcover

CTA, call to action, primary button, join button, purple button, rounded rectangle, rounded corners, pill-like, bevel, beveled edge, chamfered edge, inner highlight, rim light, glossy sheen, plastic surface, shiny finish, subtle gradient, light-to-dark gradient, inner stroke, border highlight, depth, elevation, raised effect, drop shadow, long shadow, soft shadow, outer shadow, high contrast, dark UI background, white text, sans serif type, bold label, centered label, large button, hover-state vibe, pressed-state illusion, tactile, clickable, skeuomorphic, dimensional, 3D look, UI component, web interface, app interface, onboarding CTA, signup CTA, conversion element, modern yet classic, polished, clean, accessible contrast, readable, high-visibility, attention-grabbing, primary action, interface control, clickable affordance, lighting effect, highlight and shadow interplay, glossy UI, plastic button aesthetic