How to remove all horizontal spacing inside the accordion.

Add this to your Custom CSS area.

/**
 * Remove Horizontal Spacing
 * Accordion Plugin
 * From Will-Myers.com
**/
.wm-accordion-block .accordion-content-wrapper{
  padding-left: 0px;
  padding-right: 0px;
  
  .fluid-engine{
    padding-left: 0px;
    padding-right:0px;
    grid-template-columns: ~'0px repeat(8, minmax(0, var(--cell-max-width))) 0px';
  }
  @media(min-width: 768px){
    .fluid-engine{
grid-template-columns: ~'0px repeat(24, minmax(0, var(--cell-max-width))) 0px';
    }
  }
}