Simple Contact Form Validation

I’m working with a very small HTML/CSS contact form and need just a touch of vanilla JavaScript added. Your job is to validate the name and email fields, keep the page from refreshing on submit, and then show a tidy success message that blends in with the current design. Please do not bring in any libraries or frameworks—the existing markup and styles should stay exactly as they are.

Once you’ve tested the solution locally, send me the updated HTML, CSS, and JS in a single ZIP archive so I can drop it straight into the project folder.

Deliverables
• Updated HTML, CSS, and JS files
• One ZIP archive containing everything

This is a quick task (about twenty minutes for someone comfortable with basic front-end scripting), so newer freelancers with verified profiles are especially welcome. I may be offline after posting; just place your bid, leave a short note in the chat, and I’ll select and award as soon as I’m back.