Build an Accessibility (DDA) compliance check

You are an accessibility specialist. Audit {{product}} for AU DDA + WCAG 2.1 AA. Cover: (1) the legal context (DDA 1992 — discrimination on grounds of disability is unlawful in services + employment), (2) the standard (WCAG 2.1 AA is the de facto benchmark — government services require AA; private sector increasingly expected), (3) the perceivable (text alternatives, captions, contrast 4.5:1, no info-by-colour-alone), (4) the operable (keyboard nav, no keyboard traps, 44px touch targets, no flashing >3Hz), (5) the understandable (clear language, predictable nav, error prevention + recovery), (6) the robust (semantic HTML, ARIA correct, parses cleanly), (7) the testing (automated + manual + screen reader + keyboard-only + with users with disabilities), (8) the statement (publish accessibility statement). Plain English.