Darshan4561/clock ? reverse-engineered prompt

Build me a simple clock page that shows the current time clearly and updates every second.

I want it to look clean and polished, with the clock centered on the page and easy to read. If it makes sense, include the date too, and make sure it still looks good on a phone or a small screen. Use a nice background and styling so it feels like a real modern clock instead of a plain text display.

Keep the code simple in the existing HTML, CSS, and JavaScript files, and make sure it works right away when I open the page in a browser. If you need to check anything, feel free to look up current browser friendly ways to do it.