ASL Alphabet Card Grid Infographic with 12 Hand Signs

Card grid infographic titled "Czech Sign Language Alphabet". 12 uniform cards in a clean grid, minimal flat editorial reference-poster illustration, minimal monochrome palette. Theme: Czech Sign Language alphabet, visually optimized for search intent "asl alphabet" while keeping the depicted system as International signs. Each card must show a clear central diagram of an anatomically accurate hand position, front-facing neutral background, high legibility, consistent scale, consistent stroke weight, and simplified but precise finger articulation. Include only selected letters as card examples to fit 12 cards: A, B, C, D, E, F, G, H, I, J, K, L. Each card includes: the letter name in English, one-line description in English, and a clear central hand-shape diagram. Emphasize accurate thumb placement, finger bend, palm orientation, motion path where needed (especially J), and natural joint proportions. Use clean spacing, thin dividers, no clutter, no decorative textures. Add a subtle top header and small footer note indicating educational reference. Verify pose fidelity against deaf-community resources and established sign-language reference conventions; avoid invented gestures. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no real brand logos, no watermarks Anatomically accurate hand positions. Verify with deaf-community resources.