Create a retro-styled simple illustration in the style of a vintage Japanese postcard of a confident woman dressed in a western cowboy outfit. She should be wearing a light pink cowboy hat, a two-tone western shirt with a black collar and cuffs, and high-waisted dark pants. The woman is in a relaxed pose, leaning slightly to one side, with long wavy hair cascading over her shoulders. She is smoking a cigarette with stylized smoke curling upwards. The color palette should include soft and muted tones like pink, beige, and black, capturing a mid-20th-century vintage aesthetic with a cool and laid-back vibe.