I need a small, self-contained form that lets me enter a single date directly on my website. The task is limited to the front-end: one input, clearly labelled, that uses an HTML5 date picker (or a lightweight equivalent) so visitors can’t mistype the value. Please make sure the code gracefully handles browsers that don’t support the native picker by falling back to a clear text field with validation. Key points for this job • One date field presented on a clean, responsive form. • Validation to stop blank submissions or impossible dates. • Well-commented HTML, CSS, and vanilla JavaScript (or a minimal framework if you prefer) that I can drop into an existing page. Once the date is accepted, no further processing is required right now—I simply need the value captured on the client side so I can extend the logic later. Please keep the code tidy and easy to adapt, and send back the ready-to-embed files plus brief instructions on where to paste them in my site.