How do I alter the font of text on submit button?

I’m using cf7 and would like to make the text on the button bigger. I’ve identified how to alter the button size and it’s colour, but the text escapes me.

Here’s what I’m using to control the button’s size.

<style>
.wpcf7-form .wpcf7-submit { background-color: #98FB98; }
.wpcf7-form .wpcf7-submit:hover { background-color: #b1d140; }
.wpcf7 input.wpcf7-submit {
padding: 20px 20px ;
</style>

Any suggestions for the text as I’m stuck?

Thanks