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#grid-column-gap
Defines the gutter between the columns of a grid container.
            default
          grid-column-gap: 0;
        
Removes the gap.
          grid-column-gap: 10px;
        
You can use pixel values.
          grid-column-gap: 3rem;
        
You can use (r)em values.
          grid-column-gap: 20%;
        
You can use percentage values.