How do I add a Custom CSS File to the account area?

You can add a custom CSS file to the account area by creating a file named account-area.css in your public directory.

Example contents where we're overriding the default colours:

:root {
    --bpa-color-primary: deepskyblue;
    --bpa-color-success: forestgreen;
    --bpa-color-warning: darkorange;
    --bpa-color-error: red;
    --bpa-color-helpbox: aliceblue;
    --bpa-color-content-background: ghostwhite;
}

You can also place this file in your theme if preferred.