ZERO the Margin on the Dawn theme for a Custom Liquid Section

[DominantGraph]

Greetings Gurus, I'm using a Custom Liquid Section on my index page and simply want to ZERO the Margin to eliminate the gaps above and below.
Please advise

{%- if template.name == 'index' -%}
  <h1 itemscope itemtype="http://schema.org/Organization">
{%- else -%}
  <div itemscope itemtype="http://schema.org/Organization">
{%- endif -%}

  <a href="/" itemprop="url">
    <img src="{{ "logo.svg" | asset_url }}"
      alt="{{ shop.name }}"
      itemprop="logo">
  </a>

{%- if template.name == 'index' -%}
  </h1>
{%- else -%}
  </div>
{%- endif -%}

[Zworthkey]

@DominantGraph 
by Using margin and padding you can remove the gap. 
Thank you.

[DominantGraph]

Please elaborate a bit.

[Zworthkey]

like margin-top:10px;
padding-bottom:20px;
or
@DominantGraph 
Kindly share your Site url. so i can help you.

[dmwwebartisan]

@DominantGraph 

Please share your store URL.

Thanks!

[DominantGraph]

This is the site: https://inevitabilitee.myshopify.com

the code is testing

It's the firts image at the top. Where do I put the code you mentioned?

like margin-top:10px;
padding-bottom:20px;

I'm a newbie

[Zworthkey]

Store is password protected.

[DominantGraph]

the code is testing

[Zworthkey]

Hii, @DominantGraph 
Paste this code on top of the base.css file.

section#shopify-section-template--15272167112939__1634552218f637ba57 h1 {
    margin-top: -70px !important;
}

Thank You.

[DominantGraph]

Thanks for your help, that snippet took care of the margin but broke a lot of other things!
It removed the 'Welcome to our store' section and screwed up the header margin.
It also removed the shading from the lower sections.

Original (I only want that white gap gone where the red arrow is.