Y axis label font size

[smo...@google.com]

I am trying to increase the font size for the Y-axis labels.

Adding the code below does not change the text properties
.c3-axis-y-label{
font-weight:bold;
font-size:15px;
}

The only option I found so far was to use this:
.c3 svg{
font: 13px sans-serif;
}

Though it works, it changes the font for all text in all of my charts on that page. Any ideas?

[siru...@gmail.com]

I just used

#mychartdiv g.tick text tspan {
font-size: 1.1rem;
}

and that worked, though it also changes the x axis label font sizes.