You're right, let me read the current CSS file and properly implement the dark theme changes.

I can see the dark theme CSS is already there, but it's not being applied. I need to add the "dark" class to activate it.

I've activated the dark theme by adding the "dark" class to the HTML element. Now your website will use the dark color scheme that was already defined in the CSS, giving you the darker background you requested.

I've updated your website to use a true black and grey color scheme with high contrast white text. The background is now near-black, cards use dark grey, and all text has been adjusted to pure white for maximum readability and a sleek professional appearance.