Playful but grown-up: this retro doodle 89th birthday invitation puts a hand-lettered script on warm off-white paper and rings it with a doodle border — disco ball, champagne, a party hat, a cocktail glass, a vinyl record, cake, balloons, stars and streamers — in a crisp four-colour palette of red-orange, royal blue, olive green and mustard yellow, mid-century editorial charm with a loose marker-like stroke. The guest page keeps the doodles alive: the disco ball turns, streamers draw themselves across the paper, the champagne cork pops, the script name settles in with a wobble, and every block sits on its own off-white card with a doodle at the corner. Guests get the essentials at a glance: the date and time, the venue on a live map with one-tap directions, a personal note from the host, a live countdown on doodled tiles, and a big RSVP button that answers Yes, No or Maybe in a single tap. Built mobile-first, it reads perfectly on a phone in a group chat and opens up on a laptop with the doodles spilling into the margins. Every detail is editable in minutes: the name, the age, the date, the venue, the host message and the RSVP deadline. Share it by link, text or email and watch the replies land in your dashboard. The same retro doodle look carries through the party kit: a welcome sign, a thank-you card, an empty photo-booth frame, place cards and a guest book sheet. Hosts can preview every change live before a single guest sees it.