Line Height (or Line spacing or paragraph spacing

Hi there, I have a 'designer's' problem where the spacing is uneven in my header text. I have an H3 line, and H1 line and an H3 line and I want the spacing to be even, but I can't do this globally, or at least within the existing settings.

the page is redeemer-np.squarespace.com (password:redeemer)

I'd like to somehow raise the bottom H3 text up so its equal with the spacing of the h3 text above (or raise the upper H3 text up to match the lower!). Is there some operand similar to paragraph spacing that I could tweak, only for this header or page?

Many thanks.

@conan99Need site url to check.

Its only a SQSP site at the moment at the address noted: redeemer-np.squarespace.com (password redeemer)

@conan99 Add to Home > Design > Custom CSS

div#block-yui_3_17_2_1_1562824166618_6558 h1 {
    margin-bottom: 16px;
}

Thanks Tuan! I thought about using margin, but thought that referencing a block-yui was frowned upon?

I also used .2em as my spacing (rather than 16px) on the possibility that it affected it proportionately.

You are my hero, many thanks.

@Troublemaker You're welcome. How to create the above image? 😜

29 minutes ago, tuanphan said:

@Troublemaker You're welcome. How to create the above image? 😜

Its a flag mockup. https://creativemarket.com/coloformia/1320725-Photorealistic-Flag-MockUp