Premium minimalist Seoul travel poster, 3:4 vertical. Sophisticated editorial travel-magazine style with clean flat-vector illustration, subtle shading, soft pastel sunset colors, and elegant composition. Show a historic Korean hanok street in the foreground with warm lanterns and a few small pedestrians, a tree-lined stream through the middle, and Seoul's skyline in the background featuring N Seoul Tower and Lotte World Tower. Large 'SEOUL' typography at the upper-left, with 'SOUTH KOREA', 'A CITY WHERE TRADITION MEETS TOMORROW', and Korean text '전통과 미래가 만나는 도시, 서울'. Add a small Seoul postal-style emblem and a clean cream footer with 'RICH HERITAGE · MODERN VIBES · VIBRANT CITY · ENDLESS DISCOVERIES'. Soft pink, peach, powder blue, ivory, sage and navy palette. Clean premium finish, accurate Korean architecture, balanced negative space. No photorealism, no watercolor, no clutter, no excessive people, no distorted buildings, no random text, no watermark.