pxvmc/src/wide_settings.css

[class*="standardSidebarView-"]
  [class*="contentColumn-"]:not([class*="contentColumnWide-"]) {
  max-width: 100%;
}

[class*="standardSidebarView-"] [class*="sidebarRegion-"] {
  flex: 0;
}

[class^="accountProfileCard-"] {
  max-width: 660px;
}