Interior Designer Letterhead Template in Black and Warm White

Print-ready letterhead template for interior designer letterhead (legal). Company brief: interior designer letterhead. Style: tech startup, black + warm white palette. Header band with placeholder logo + company name. Footer strip with placeholder address, phone, email, website, registration number. Watermark: geometric pattern. Generous text area for body copy. A4 portrait, no watermarks (other than chosen design). No real registration numbers or addresses — use clean placeholders. No fake government seals. Target search intent (rendered visually, no on-image text): "interior designer letterhead" (en).