Here is the styleplus. css file from skin6-guppy-03 for GuppY 6,
it is deliberately reduced to the bare necessities.

 

/* mobile general statements - skin6-guppy-03 */

@media screen and (max-width: 760px), screen and (max-device-width: 760px) { /* mobile display */
  body { padding: 0; } /* no internal margins */
  #TopBoxes { margin-top: 36px; }  /* high external margin */
  .T0entrow6 { display: block; } /* block display */
  .T1entrow4 { display: block; } /* block display */
  .T2entrow4 { display: block; } /* block display */
  .T3entrow4 { display: block; } /* block display */
  .T4entrow4 { display: block; } /* block display */
  .wcol1T00, .wcol3T00 { display: none; } /* not display */
  .wcol1T10, .wcol3T10 { display: none; } /* not display */
  .wcol1T20, .wcol3T20 { display: none; } /* not display */
  .wcol1T30, .wcol3T30 { display: none; } /* not display */
  .wcol1T40, .wcol3T40 { display: none; } /* not display */
  #LeftBoxes { order: 4 !important; } /* display order */
  #RightBoxes { order: 5 !important; } /* display order */
  #paranav { top: 0; left: 0; padding: 1rem; width: 100%; display: inline-flex; background-color: #0F056B;} /* position internal margins display background-color */
  #paranav li { margin: 0 2rem; } /* external margins */
  .iconSocnetW { text-align: center !important; } /* center align */
  .a-col { padding-left: 0 !important; padding-right: 0 !important; } /* internal margins */
  div.quote { display: none; } /* not display */
  nav.menuIcons ul li { text-align: left; line-height: 3.2rem; } /* align left and line height */
  #returnOnTop { display: none !important; } /* not display */
  .tbluseravaW i { width: 48px; height: 48px; } /* width and height */
  fieldset { margin: 0; } /* no external margins */
  .nav-link .dropdown-toggle { padding: .5rem 1rem; } /* internal margins */
  #MainContent {margin:60px 0 0; padding: 10px 0 !important; border: 0 !important; } /* external and internal margins border */ 
  .B0entrow1 { padding: 10px 2px !important; } /* internal margins */
  #BottomBoxes .titre, #BottomBoxes .tbl, 
  #BottomBoxes .titrebox, #BottomBoxes .tblbox { padding: 10px 2px !important; } /* internal margins */
}