Use case: precise-object-edit / stylized-concept. Create ONE 1536x1024 landscape room concept. The supplied image is the canonical Ranch On Air room to customize. Preserve the straight-on front elevation, single flat back wall, exact broad layout, room proportions, window slot upper right, storage slot left, desk central, chair center and pet corner lower right. Preserve the polished hand-painted 2D cozy game illustration style and coherent scale. This is a new furnishing preset of the SAME customizable room. No isometric room, no side walls, no 3D renderer look, no app UI, no text labels, no logos. Avoid large shifts in camera or furniture overlap. Make this the Coastal Air theme. Change back wall to pale sea-glass sage painted beadboard, weathered pale oak trim, an ivory desk with light-oak top and brass cup handles, soft sea-blue upholstered chair, off-white enameled articulated task lamp. Replace window view with blue Atlantic water, dune grass, pale sandy headland and soft sunrise, visible slender amateur radio antenna outside. Keep a proper charcoal amateur radio with cyan display and microphone central, marine-blue compact power supply. Left bookcase in whitewashed wood, woven baskets and neatly folded charts; pinboard with shore landscape contact cards. One small nautical map, no nautical cliche clutter. Tan natural-fiber rug with teal edging; small potted rosemary. Sleeping cream-colored dog in a navy-striped canvas bed lower right. Bright airy balanced daylight with warm lamp accents; not overexposed. Return only the full room artwork.