Builds a responsive wedding invitation as one self-contained HTML page: hero with names, date and optional photo, a live countdown, ceremony and reception details with a map button, a schedule timeline, your Markdown story, RSVP buttons (WhatsApp with a pre-filled message, an RSVP form link, e-mail), dress code, gift registry, hashtag, an add-to-calendar link and a footer — in English or Indonesian, in five themes and four font pairs (Google Fonts optional). Links are validated (no javascript: URLs), text is escaped, and the page has no dependencies, so it can be hosted anywhere or sent as a file. The preview runs the countdown.