Step 1 — data: search the web for today's 5 largest cryptocurrencies by market capitalization (Bitcoin, Ethereum, Solana, Cardano and XRP). Retrieve the current price and the 24-hour percentage change of each one.

Step 2 — design: build a dark financial dashboard in the style of professional trading terminals.
- Background: deep blue-black.
- Accents: green for positive changes, red for negative ones.

For each coin, show:
- the coin's name with its ticker
- the price right now, in large text
- 24-hour percentage change
- a small sparkline of the last 7 days

Layout: a 16:9 dashboard that works as a presentation slide. A subtle grid in the background. At the bottom, a small label reading "Last updated: [current date & time]".

Output: 4K resolution.