How do I eliminate stubborn white space between fluidRows in Shiny?

I have two fluidRows in a column of my UI in Shiny.

I want the top row to have a slight space above it, but I want to eliminate any space between the rows.

• I've tried div, tags, and an assortment of style arguments like margin: 0px and padding: 0px ..., but I can't get the spacing to act accordingly.

  • Here's an example:

    ui <- fluidPage(
    fluidRow(
    column(1,offset=0,
           div(style = "font-size: 10px; padding: 14px 0px; margin:0%",
               fluidRow(
                 sliderInput(inputId = "sizeSlide", label = "Sizing", value = 10, min = 1,max = 20)
               )
           ),
           div(style = "font-size: 10px; padding: 0px 0px; margin:0px", 
               fluidRow(
                 radioButtons(inputId = "greatORless", label = "DBH Limiter", choices = c(">", "<"), selected = ">")
               )                                      
           )
        )
      )
    )
    

What I get is this:

^{(Notice the large [unwanted] space between rows)}

What I want is this:

^{(Notice the significantly smaller space between rows)}

How do I do this??