{ "type": "two-sided event flyer mockup", "style": "watercolor illustration, warm earthy tones, cozy, inviting, rustic", "left_side_front": { "header": { "title": "{argument name=\"event name\" default=\"SENDAI COFFEE PICNIC 2026\"}", "subtitle": "{argument name=\"subtitle\" default=\"街のカフェが集まる、春の1日\"}", "tagline": "A relaxing time with your favorite cup"
