Trying to change the appearance of h2 in Magento 2 CSS - Where can I do this?

[phillipmeyer]

Hello,

I'm pretty experienced with Magento 1 but finding Magento 2 a struggle. I want to change the appearance of <h2> text but I cannot find the .less file that will let me do this. Specifically, I want to a left and right margin to these on desktops (not mobile), can anyone help?

I have found the following code but that's pretty much the only reference to h2 that I can find anywhere and nothing I do to this will change the output on the screen. I've tried extending this in my theme and amending it directly.

(Also, I have run setup:upgrade and cleared the cash, etc).

I don't actually fully understand what '.lib-typography-headings()' does either.

lib/web/css/source/lib/_typography.less

.lib-typography-headings() {
    h1 {
        .lib-heading(h1);
    }

    h2 {
        .lib-heading(h2);
    }

    h3 {
        .lib-heading(h3);
    }

    h4 {
        .lib-heading(h4);
    }

    h5 {
        .lib-heading(h5);
    }

    h6 {
        .lib-heading(h6);
    }

    h1, h2, h3, h4, h5, h6 {
        small,
        .small {
            .lib-typography(
                @heading__small-size,
                @heading__small-color,
                @_line-height: @heading__small-line-height
            );
        }
    }
}