extjs/modern/theme-device-base/sass/src/Panel.scss

   1 .x-msgbox {
   2     padding: 6px;
   3     background-color: #ccc;
   4 }
   5 .x-panel, .x-form {
   6     &.x-floating {
   7         padding: 6px;
   8
   9         > * > .x-dock-body {
  10             background-color: #fff;
  11         }
  12     }
  13 }
  14
  15 .x-panel.x-floating > .x-dock.x-sized,
  16 .x-msgbox > .x-dock.x-sized,
  17 .x-form.x-floating > .x-dock.x-sized {
  18     margin: 6px;
  19 }