How to write adaptive styles for the VK authorization widget?

Question

css

In general, I tied a widget for VK authorization. As always, I decided to immediately check how it would look on mobile phones, which means I went through the "mobile window emulator" in the browser and saw what I saw:

Everything is written in small text. Even more so on a small screen. Is it possible to somehow fix this through CSS (well, or through something else). And if so, can you throw off code examples. Thanks in advance :)