Regarding some padding...

in this quick sample, I wanted to make a narrow column that will most likely be viewed on mobile devices more than anything else, so I used the:

"mt-5 divcenter" to control the width and keep it tidy. It IS wrapped in the "section" element and if I had a color there or an image, how can I remove that padding between top of the Mt-5 DivCenter.

the sample is at

http://www.code.minus302.com/

I'd love to have that image container start immediately under the nav-bar.

Also...I used a class to add three nav buttons on the bottom. When this gets smaller, there is a gap between those columns where the buttons live. IS there a way to get those to stack?

<div class="col_full" style="margin:0px;padding:0px;">
<div class="col_one_third" style="background-color:#898989;padding:0px;">
<div align="center"><button type="button" class="button button-large " style="background-color: #898989;">LINK</button></div>
</div>

         <div class="col_one_third" style="background-color:#898989;padding:0px;">
             <div align="center"><button type="button" class="button button-large " style="background-color: #898989;">LINK</button></div>
        </div>
        
        <div class=".col_one_third .col_last" style="background-color:#898989;padding:0px;">
        
           <div align="center"><button type="button" class="button button-large " style="background-color: #898989;">LINK</button></div>
            
        </div>
        </div>

Thanks for the tips!