Warning, /plasma/breeze-gtk/src/gtk3/widgets/_headerbar.scss is written in an unsupported language. File is not indexed.

 @charset "UTF-8";
 
 /***************
  * Header bars *
  ***************/
 
 %titlebar,
 headerbar {
         padding: 0px 6px;
         border-width: 0px 0px 1px 0px;
         border-radius: 6px 6px 0px 0px;
         border-style: solid;
         border-color: gtk("@borders");
         color: gtk("@theme_titlebar_foreground");
         background-image: none;
         background-color: gtk("@theme_titlebar_background");
         border-top: 1px solid lighter(gtk("@theme_titlebar_background"));
 
         &:backdrop {
                 background-image: none;
                 background-color: gtk(
                         "@theme_titlebar_background_backdrop"
                 );
                 color: gtk("@theme_titlebar_foreground_backdrop");
                 border-top: 1px solid lighter(gtk("@theme_titlebar_background_backdrop"));
                 box-shadow: none;
         }
         label {
                 font-weight: normal;
                 &:backdrop {
                         color: gtk("@theme_titlebar_foreground_backdrop");
                 }
         }
         .path-bar button {
                 color: gtk("@theme_titlebar_foreground");
                 font-weight: normal;
                 &:backdrop {
                         color: gtk("@theme_titlebar_foreground_backdrop");
                 }
         }
         .linked button {
                 @include neobutton(normal);
         }
         button {
                 @include neobutton(toolbutton);
 
                 //ensure we don't have a shadow on headerbar buttons at all
                 box-shadow: none;
                 color: gtk("@theme_titlebar_foreground");
 
                 &:hover {
                         color: gtk("@theme_titlebar_foreground");
                 }
 
                 &:backdrop {
                         background-image: none;
                         background-color: gtk(
                                 "@theme_titlebar_background_backdrop"
                         );
                         color: gtk("@theme_titlebar_foreground_backdrop");
                 }
 
                 &.flat:backdrop,
                 &.flat:backdrop:disabled,
                 &:disabled:backdrop {
                         background-image: none;
                         background-color: gtk(
                                 "@theme_titlebar_background_backdrop"
                         );
                         color: gtk("@theme_titlebar_foreground_backdrop");
                         border-color: transparent;
                 }
                 &.flat:disabled {
                         @extend %undecorated_button;
                         color: gtk("@theme_titlebar_foreground_insensitive");
                 }
                 &:disabled {
                         background-color: transparent;
                         background-image: none;
                         border-color: transparent;
                         color: gtk("@theme_titlebar_foreground_insensitive");
                 }
         }
 
         .title {
                 font-weight: normal;
                 padding: 0px 12px;
                 &:backdrop {
                         color: gtk("@theme_titlebar_foreground_backdrop");
                 }
         }
 
         .subtitle {
                 font-size: smaller;
                 padding: 0 12px;
                 @extend .dim-label;
                 &:backdrop {
                         color: gtk("@theme_titlebar_foreground_backdrop");
                 }
         }
 
         separator {
                 border-width: 0px;
                 background-color: transparent;
                 background-image: none;
                 border-color: transparent;
         }
 
         &.selection-mode,
         &.selection-mode headerbar {
                 background-color: gtkmix(
                         "@theme_titlebar_background",
                         "@theme_button_decoration_focus",
                         0.5
                 );
                 separator {
                         background-color: gtk(
                                 "@theme_button_decoration_focus"
                         );
                 }
                 button:not(.titlebutton) {
                         background-color: gtkalpha(
                                 gtk("@theme_button_decoration_focus"),
                                 0.5
                         );
                         &:active,
                         &:focus {
                                 background-color: gtk(
                                         "@theme_button_decoration_focus"
                                 );
                         }
                 }
 
                 .subtitle:link {
                         @extend %link, :selected;
                 }
 
                 .selection-menu {
                         padding: 4px 6px;
 
                         GtkArrow {
                                 -GtkArrow-arrow-scaling: 1;
                         }
 
                         .arrow {
                                 -gtk-icon-source: -gtk-icontheme($arrow_down);
                                 -gtk-icon-shadow: none;
                         }
                 }
         }
 
         .tiled &,
         .maximized & {
                 border-radius: 0; // squared corners when the window is max'd or tiled
         }
 }
 
 headerbar {
         // add vertical margins to headerbar entries, buttons and separators to avoid them spanning the whole height
         entry,
         spinbutton,
         separator,
         button {
                 margin-top: 8px;
                 margin-bottom: 8px;
         }
 }