💱 Currency Converter

📖 How to Use

1. When the page loads, it automatically fetches the latest exchange rates — wait a second or two for the "Loading exchange rates..." message to disappear before the converter fields appear.
2. Enter an amount to convert, e.g. 100.
3. Choose the "From" currency — a fiat currency like USD or TWD, or a cryptocurrency like BTC or ETH.
4. Choose the "To" currency — the currency you want to convert into.
5. The result updates automatically whenever you change the amount or either currency — no button needed.
6. Read the result: the large number is the converted amount, with the current exchange rate shown below it (how much of the target currency one unit of the source is worth). If either currency is a cryptocurrency, its 24-hour price change also appears (green for up, red for down).