Source: dist/css/acc_uc.css, line 2735
Example s
m_0
margin: 0
m_n5
margin: -2rem
m_n2
margin: -0.25rem
m_4
margin: 1rem
m-l_n5
margin-left: -2rem
m-l_1
margin-left: 1px
m-l_2
margin-left: 0.25rem
m-l_3
margin-left: 0.5rem
m-x_auto
margin-left, margin-right: auto
m-y_3
margin-top, margin-bottom: 0.5rem
<div class="bg_warning-3 d-block br_1 br_solid">
<div class="[modifier class] p_2 bg_primary text_center c_white cell auto opacity_5 d-block max-w_30">Object With Margins Inside Container</div>
</div>