Styling line height in html code injection

Site URL: https://apple-drum-7nk8.squarespace.com/perspectives

I created a code injection to style two different font types and colors within a single text box, so to speak. In demo mode, it's working perfectly, but for some reason when I test the live version of the site, there's an extra line break appearing between the orange number and the title text (see screen grabs for reference).  Within my html code injection, how can I either reduce the vertical space of the line break, or minimize the line height between the number and the chapter title. The first screengrab (in demo mode) shows how I want the live version (see second screengrab) to function. 

Site page: https://apple-drum-7nk8.squarespace.com/perspectives  Password: p3akt3ch

My HTML code injection: <span style = "p2"> <p2 style="color:#f95624"> 01. <h3>Build Your Story</h3>

CSS?

p2 h3 {
    margin-top: 0px;
}

Hi. H3 has default padding. Add this to Design > Custom CSS

.code-block h3 {
    margin-top: 0;
}

I see on mobile, overlay menu items overlap together. You can check. If you need to fix, we will give the code

@Alexg77

@tuanphanIt works, thank you!