Themed Party Concept Developer

Help me develop a themed party concept. Theme: [specific theme or vibe], Occasion: [birthday/holiday/just because], Guest count: [number], Budget: [amount], Venue: [home/rented/outdoor], Guest demographics: [ages/interests], Participation level expected: [costumes required/encouraged/optional], Duration: [hours], Time of day: [when], Elements to design: [invitations/decor/food/drinks/activities/music/favors], Inspiration sources: [movies/eras/places/concepts], Must-include activities: [any], Photo opportunity needs: [backdrop/props/booth], Dietary variety: [needs]. Create: Theme execution guide, decoration checklist with DIY options, themed menu with recipes, activity timeline, playlist suggestions, costume guidelines, and photo moment setups.