How to make a button like this in python kivy?

Question

Python

The background color rgba = (.95, .95, .95, 1) should change to white on hover
. The button should have a bottom border

. I've been trying to do this for half an hour, but I can't figure out how to place the icon inside the button to the left of the text. And I can’t figure it out with border, I just figured out how to set lines around the button:

canvas.before:
            Color:
                rgba: (.95, .95, .95, 1)
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height

But how to leave this line only at the bottom?