I'll update all the buttons to have a gold color, which will enhance the luxurious and elite feel of the application. I'll make this change across all components where buttons are used.

These changes will make all buttons in your application gold-colored, which enhances the luxurious and elite feel of your network app. Here's a summary of the improvements:

1. Added a custom --gold CSS variable in the global CSS file for consistent use across the application.
2. Updated the Header component to use the gold color for the "Connect Solana Wallet" and "Join Network" buttons.
3. Modified the EventCard component to use the gold color for the RSVP button.
4. Updated the JoinNetworkModal to include a gold "Close" button.
5. Consistently used the bg-[hsl(var(--gold))] class for button backgrounds and text-black for button text to ensure good contrast.

These changes create a cohesive and visually striking design that emphasizes the exclusive nature of your elite network. The gold buttons stand out against the dark background, drawing attention to the main actions users can take.

To further refine the UI, you could consider:

1. Adding a subtle gold glow effect to buttons on hover or focus.
2. Using gold-colored icons alongside button text for added visual interest.
3. Implementing a gold-colored loading spinner or progress bar for actions like connecting the wallet or submitting RSVPs.
4. Adding gold accents to other interactive elements, like form inputs or dropdown menus, to maintain consistency.

Remember to test the application across different devices and screen sizes to ensure the gold buttons look good and remain functional in all contexts. Also, consider adding appropriate aria labels and roles to ensure accessibility for users who rely on screen readers.

I'll update the color scheme as you've requested, using the specific color #EFBF04 for the buttons and changing the card and header backgrounds to white with black text. Let's make these changes across the components.

These changes implement the color scheme you requested:

1. All buttons now use the color #EFBF04.
2. The background of cards is now white with black text.
3. The header is now white with black text.
4. The main background is set to a light gray (bg-gray-100) to provide some contrast with the white cards.

This new color scheme gives your Elite Network app a clean, professional look while still maintaining a touch of exclusivity with the gold buttons. The white backgrounds for the cards and header create a fresh, modern feel, and the black text ensures good readability.

Here's a summary of the key changes:

1. Updated the global CSS to define the new gold color (#EFBF04).
2. Modified the Header component to have a white background and black text.
3. Updated the EventCard component to have a white background, black text, and the new gold color for buttons.
4. Adjusted the JoinNetworkModal to match the new color scheme.
5. Updated the main page component to use a light gray background, providing contrast with the white cards.

These changes should give your app the look you're aiming for. The gold buttons will stand out nicely against the white backgrounds, drawing attention to the main actions users can take.

If you want to make any further adjustments or have any other specific design elements you'd like to change, feel free to ask!