summer black and gold hand drawn round thin line postcard. seasonal greeting with word summer. doodle summer card with

background banner bird black branch butterfly card cartoon cloudy congratulations curls curly design designelement doodle emblem feeling floral flower foliage green greetingcard handdrawn holiday illustration inspiration inspirational invitation isolatedonwhitebackground journey leaf marine motivation ocean plant postcard poster print round season seawave sky summer sun template tropical typography vector white