gtk2/gtk/gtk-win32-base.css

@define-color bg_color -gtk-win32-color(button, 15);
@define-color text_color -gtk-win32-color(button, 18);
@define-color base_color #fff;
@define-color selected_bg_color -gtk-win32-color(button, 13);
@define-color selected_fg_color -gtk-win32-color(button, 14);
@define-color info_fg_color rgb (181, 171, 156);
@define-color info_bg_color rgb (252, 252, 189);
@define-color warning_fg_color rgb (173, 120, 41);
@define-color warning_bg_color rgb (250, 173, 61);
@define-color question_fg_color rgb (97, 122, 214);
@define-color question_bg_color rgb (138, 173, 212);
@define-color error_fg_color rgb (166, 38, 38);
@define-color error_bg_color rgb (237, 54, 54);

GtkWindow,
GtkViewport {
    background-color: @bg_color;
}

* {
    color: -gtk-win32-color(button, 18);
    -GtkWidget-link-color: -gtk-win32-color(button, 26);
    -GtkWidget-visited-link-color: -gtk-win32-color(button, 26);
    border-color: shade (@bg_color, 0.6);

    -GtkScrolledWindow-scrollbars-within-bevel: 1;
    -GtkScrolledWindow-scrollbars-spacing: 0;
}

GtkFrame {
    border-width: 2px;
    border-style: solid;
    background-color: transparent;
    border-image: -gtk-win32-theme-part(button, 4 1) 2 2 2 2 stretch;
}

*:insensitive {
    color: -gtk-win32-color(button, 17);
}

*:selected,
*:selected:focus {
    background-color: @selected_bg_color;
    color: @selected_fg_color;
}

.info {
    background-color: @info_bg_color;
    color: @info_fg_color;
}

.warning {
    background-color: @warning_bg_color;
    color: @warning_fg_color;
}

.question {
    background-color: @question_bg_color;
    color: @question_fg_color;
}

.error {
    background-color: @error_bg_color;
    color: @error_fg_color;
}

.highlight {
    background-color: @selected_bg_color;
    color: @selected_fg_color;
}

.light-area-focus {
    color: #000;
}

.dark-area-focus {
    color: #fff;
}

.notebook > GtkScrolledWindow.frame {
    border-style: none;
}

GtkScrolledWindow.frame {
  border-style: solid;
  border-width: 2px;
  border-image: -gtk-win32-theme-part(listview, 5 1) 2 2 2 2 stretch;
}

.view {
  border-width: 0;
  border-radius: 0;
  background-color: @base_color;
  color: @text_color;
}

.view:selected {
  background-color: shade (@bg_color, 0.9);
  color: @fg_color;
}

.view:selected:focused {
  background-color: @selected_bg_color;
  color: @selected_fg_color;
}

.tooltip {
    background-color: -gtk-win32-color(button, 24);
    color: -gtk-win32-color(button, 23);
    border-width: 1px;
    border-style: solid;
}

.tooltip * {
    color: -gtk-win32-color(button, 23);
}

GtkAssistant .sidebar .highlight {
    font: bold;
    color:  -gtk-win32-color(button, 9);
}

/* Buttons */

.button {
    color: -gtk-win32-color(button, 18);
    background-color: transparent;
    background-image: -gtk-win32-theme-part(button, 1 1);
    border-width: 0;
    -GtkWidget-focus-line-width: 1;
    -GtkWidget-focus-padding: 3;
    -GtkButton-interior-focus: true;
    padding: 3px;
}

.button:insensitive {
    background-image: -gtk-win32-theme-part(button, 1 4);
}

.button:focused {
    background-image: -gtk-win32-theme-part(button, 1 5);
}

.button:prelight, .button:prelight:focused {
    background-image: -gtk-win32-theme-part(button, 1 2);
    color: #000000;
}

.button:active, .button:active:focused, .button:active:focused:prelight {
    background-image: -gtk-win32-theme-part(button, 1 3);
}

/* Check buttons */

.check {
    background-color: transparent;
    background-image: -gtk-win32-theme-part(button, 3 1);
    border-width: 0;
}

.check:insensitive {
    background-image: -gtk-win32-theme-part(button, 3 4);
}

/* The GtkButton here is to avoid problems with checkboxes
   in a listview where all checkboxes in a row gets prelighted
   whenever the row is prelighted */

GtkButton.check:prelight {
    background-image: -gtk-win32-theme-part(button, 3 2);
}

.check:active {
    background-image: -gtk-win32-theme-part(button, 3 5);
}

.check:active:insensitive {
    background-image: -gtk-win32-theme-part(button, 3 8);
}

GtkButton.check:active:prelight {
    background-image: -gtk-win32-theme-part(button, 3 6);
}

.check:inconsistent {
    background-image: -gtk-win32-theme-part(button, 3 9);
}

.check:inconsistent:insensitive {
    background-image: -gtk-win32-theme-part(button, 3 12);
}

.check:inconsistent:prelight {
    background-image: -gtk-win32-theme-part(button, 3 10);
}

/* Radio buttons */

.radio {
    background-color: transparent;
    background-image: -gtk-win32-theme-part(button, 2 1);
    border-width: 0;
}

.radio:insensitive {
    background-image: -gtk-win32-theme-part(button, 2 4);
}

.radio:prelight {
    background-image: -gtk-win32-theme-part(button, 2 2);
}

.radio:active {
    background-image: -gtk-win32-theme-part(button, 2 5);
}

.radio:active:insensitive {
    background-image: -gtk-win32-theme-part(button, 2 8);
}

.radio:active:prelight {
    background-image: -gtk-win32-theme-part(button, 2 6);
}

.radio:inconsistent {
    background-image: -gtk-win32-theme-part(button, 2 1, over (2 5, 0.3));
}

.radio:inconsistent:insensitive {
    background-image: -gtk-win32-theme-part(button, 2 4, over (2 8, 0.3));
}

.radio:inconsistent:prelight {
    background-image: -gtk-win32-theme-part(button, 2 4, over(2 6, 0.3));
}

/* Scrollbars */

/* TODO: Win32 has different concept for upper and lower trough, we
   don't use this atm */

.scrollbar {
    background-color: transparent;
    -GtkRange-trough-border: 0;
    -GtkRange-arrow-scaling: 0.0;
    -GtkRange-slider-width: -gtk-win32-size(scrollbar, 3);
}

.scrollbar.vertical {
    -GtkRange-slider-width: -gtk-win32-size(scrollbar, 2);
}

.scrollbar.button.bottom {
    background-image: -gtk-win32-theme-part(scrollbar, 1 5);
}

.scrollbar.button.bottom:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 6);
}

.scrollbar.button.bottom:active,
.scrollbar.button.bottom:active:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 7);
}

.scrollbar.button.bottom:insensitive {
    background-image: -gtk-win32-theme-part(scrollbar, 1 8);
}

.scrollbar.button.top {
    background-image: -gtk-win32-theme-part(scrollbar, 1 1);
}

.scrollbar.button.top:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 2);
}

.scrollbar.button.top:active,
.scrollbar.button.top:active:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 3);
}

.scrollbar.button.top:insensitive {
    background-image: -gtk-win32-theme-part(scrollbar, 1 4);
}

.scrollbar.button.left {
    background-image: -gtk-win32-theme-part(scrollbar, 1 9);
}

.scrollbar.button.left:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 10);
}

.scrollbar.button.left:active,
.scrollbar.button.left:active:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 11);
}

.scrollbar.button.left:insensitive {
    background-image: -gtk-win32-theme-part(scrollbar, 1 12);
}

.scrollbar.button.right {
    background-image: -gtk-win32-theme-part(scrollbar, 1 13);
}

.scrollbar.button.right:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 14);
}

.scrollbar.button.right:active,
.scrollbar.button.right:active:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 1 15);
}

.scrollbar.button.right:insensitive {
    background-image: -gtk-win32-theme-part(scrollbar, 1 16);
}

.scrollbar.trough {
    border-width: 0;
    background-image: -gtk-win32-theme-part(scrollbar, 2 1, over (4 1));
}

.scrollbar.trough.vertical {
    border-width: 0;
    background-image: -gtk-win32-theme-part(scrollbar, 2 1, over (6 1));
}

.scrollbar.slider {
    border-width: 0;
    background-image: -gtk-win32-theme-part(scrollbar, 2 1, over (8 1));
}

.scrollbar.slider:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 2 2, over (8 2));
}

.scrollbar.slider.vertical {
    background-image: -gtk-win32-theme-part(scrollbar, 3 1, over (9 1));
}

.scrollbar.slider.vertical:prelight {
    background-image: -gtk-win32-theme-part(scrollbar, 3 2, over (9 2));
}

/* Entry */

/* We apply the border as a border combined with the background so that
   gtk_entry_set_has_frame works */

.entry {
    border-width: 1px;
    border-style: solid;
    border-image: -gtk-win32-theme-part(edit, 6 1)  1 1 1 1 stretch;
    background-image: -gtk-win32-theme-part(edit, 6 1, margins(-1 -1 -1 -1));
    padding: 2px;
}
.entry:insensitive {
    border-image: -gtk-win32-theme-part(edit, 6 4)  1 1 1 1 stretch;
    background-image: -gtk-win32-theme-part(edit, 6 4, margins(-1 -1 -1 -1));
    color: #a7aba7;
}
.entry:prelight {
    border-image: -gtk-win32-theme-part(edit, 6 2)  1 1 1 1 stretch;
    background-image: -gtk-win32-theme-part(edit, 6 2, margins(-1 -1 -1 -1));
}
.entry:focused {
    border-image: -gtk-win32-theme-part(edit, 6 3)  1 1 1 1 stretch;
    background-image: -gtk-win32-theme-part(edit, 6 3, margins(-1 -1 -1 -1));
}

/* Spinbuttons */

.spinbutton .button,
.spinbutton .button:focused {
    background-color: transparent;
    background-image: -gtk-win32-theme-part(spin, 1 1, margins(-1 -1 0 -1));
    color: rgba(0, 0, 0, 0);
}

.spinbutton .button:last-child {
    background-image: -gtk-win32-theme-part(spin, 1 1, margins(-1 -1 0 -2));
}

.spinbutton .button:prelight,
.spinbutton .button:prelight:focused {
    background-image: -gtk-win32-theme-part(spin, 1 2, margins(-1 -1 0 -1));
}

.spinbutton .button:active,
.spinbutton .button:active:prelight,
.spinbutton .button:active:focused,
.spinbutton .button:active:prelight:focused {
    background-image: -gtk-win32-theme-part(spin, 1 3, margins(-1 -1 0 -1));
}

.spinbutton .button:insensitive {
    background-image: -gtk-win32-theme-part(spin, 1 4, margins(-1 -1 0 -1));
}

.spinbutton .button:insensitive:last-child {
    background-image: -gtk-win32-theme-part(spin, 1 4, margins(-1 -1 0 -2));
}

.spinbutton .button.bottom,
.spinbutton .button.bottom:focused {
    background-image: -gtk-win32-theme-part(spin, 2 1);
}

.spinbutton .button.bottom:prelight,
.spinbutton .button.bottom:prelight:focused {
    background-image: -gtk-win32-theme-part(spin, 2 2);
}

.spinbutton .button.bottom:active,
.spinbutton .button.bottom:active:prelight {
    background-image: -gtk-win32-theme-part(spin, 2 3);
}

.spinbutton .button.bottom:insensitive {
    background-image: -gtk-win32-theme-part(spin, 2 4);
}

/* Ranges */

/* TODO: The trough is not quite right, it covers everything,
   but in win32 the slider 'sticks out' on the sides of the
   trough */

.scale {
    background-color: transparent;
    -GtkScale-value-spacing: 0;
    -GtkScale-slider-length: 9;
    -GtkRange-slider-width: 20;
    -GtkRange-trough-border: 0;
}

.scale.trough {
    border-style: none;
    border-width: 0;
    background-image: -gtk-win32-theme-part(trackbar, 1 1, margins (2 0 2 0));
}

.scale.trough.vertical {
    background-image: -gtk-win32-theme-part(trackbar, 1 1, margins (0 2 0 2));
}

.scale.slider {
    background-color: transparent;
    border-width: 0;
    color: rgba(0,0,0,0);
    background-image: -gtk-win32-theme-part(trackbar, 3 1);
}

.scale.slider:prelight {
    background-image: -gtk-win32-theme-part(trackbar, 3 2);
}

.scale.slider:active,
.scale.slider:prelight:active {
    background-image: -gtk-win32-theme-part(trackbar, 3 3);
}

.scale.slider:focus {
    background-image: -gtk-win32-theme-part(trackbar, 3 4);
}

.scale.slider:insensitive {
    background-image: -gtk-win32-theme-part(trackbar, 3 5);
}

.scale.slider.vertical {
    background-image: -gtk-win32-theme-part(trackbar, 6 1);
}

.scale.slider.vertical:prelight {
    background-image: -gtk-win32-theme-part(trackbar, 6 2);
}

.scale.slider.vertical:active,
.scale.slider.vertical:prelight:active {
    background-image: -gtk-win32-theme-part(trackbar, 6 3);
}

.scale.slider.vertical:focus {
    background-image: -gtk-win32-theme-part(trackbar, 6 4);
}

.scale.slider.vertical:insensitive {
    background-image: -gtk-win32-theme-part(trackbar, 6 5);
}

.scale.slider.scale-has-marks-below {
    background-image: -gtk-win32-theme-part(trackbar, 4 1);
}

.scale.slider.scale-has-marks-below:prelight {
    background-image: -gtk-win32-theme-part(trackbar, 4 2);
}

.scale.slider.scale-has-marks-below:active,
.scale.slider.scale-has-marks-below:prelight:active {
    background-image: -gtk-win32-theme-part(trackbar, 4 3);
}

.scale.slider.scale-has-marks-below:focus {
    background-image: -gtk-win32-theme-part(trackbar, 4 4);
}

.scale.slider.scale-has-marks-below:insensitive {
    background-image: -gtk-win32-theme-part(trackbar, 4 5);
}

.scale.slider.scale-has-marks-below.vertical {
    background-image: -gtk-win32-theme-part(trackbar, 8 1);
}

.scale.slider.scale-has-marks-below.vertical:prelight {
    background-image: -gtk-win32-theme-part(trackbar, 8 2);
}

.scale.slider.scale-has-marks-below.vertical:active,
.scale.slider.scale-has-marks-below.vertical:prelight:active {
    background-image: -gtk-win32-theme-part(trackbar, 8 3);
}

.scale.slider.scale-has-marks-below.vertical:focus {
    background-image: -gtk-win32-theme-part(trackbar, 8 4);
}

.scale.slider.scale-has-marks-below.vertical:insensitive {
    background-image: -gtk-win32-theme-part(trackbar, 8 5);
}



.scale.slider.scale-has-marks-above {
    background-image: -gtk-win32-theme-part(trackbar, 5 1);
}

.scale.slider.scale-has-marks-above:prelight {
    background-image: -gtk-win32-theme-part(trackbar, 5 2);
}

.scale.slider.scale-has-marks-above:active,
.scale.slider.scale-has-marks-above:prelight:active {
    background-image: -gtk-win32-theme-part(trackbar, 5 3);
}

.scale.slider.scale-has-marks-above:focus {
    background-image: -gtk-win32-theme-part(trackbar, 5 4);
}

.scale.slider.scale-has-marks-above:insensitive {
    background-image: -gtk-win32-theme-part(trackbar, 5 5);
}

.scale.slider.scale-has-marks-above.vertical {
    background-image: -gtk-win32-theme-part(trackbar, 7 1);
}

.scale.slider.scale-has-marks-above.vertical:prelight {
    background-image: -gtk-win32-theme-part(trackbar, 7 2);
}

.scale.slider.scale-has-marks-above.vertical:active,
.scale.slider.scale-has-marks-above.vertical:prelight:active {
    background-image: -gtk-win32-theme-part(trackbar, 7 3);
}

.scale.slider.scale-has-marks-above.vertical:focus {
    background-image: -gtk-win32-theme-part(trackbar, 7 4);
}

.scale.slider.scale-has-marks-above.vertical:insensitive {
    background-image: -gtk-win32-theme-part(trackbar, 7 5);
}

/* Progress bars */

GtkProgressBar {
    background-color: transparent;
    padding: 0;
}

GtkProgressBar.trough {
    border-width: 0;
    background-image: -gtk-win32-theme-part(progress, 1 1);
}

GtkProgressBar.progressbar,
GtkEntry.progressbar,
GtkEntry.progressbar:focused {
    border-width: 0;
    background-image: -gtk-win32-theme-part(progress, 5 1);
}

GtkProgressBar.progressbar.pulse,
GtkEntry.progressbar.pulse,
GtkEntry.progressbar.pulse:focused {
    background-color: transparent;
    background-image: -gtk-win32-theme-part(progress, 8 1);
}

GtkProgressBar.trough.vertical {
    background-image: -gtk-win32-theme-part(progress, 2 1);
}

.progressbar.vertical {
    background-image: -gtk-win32-theme-part(progress, 6 1);
}

.progressbar.pulse.vertical {
    background-image: -gtk-win32-theme-part(progress, 10 1);
}

/* Combobox */

GtkComboBox.combobox-entry .button {
    background-color: transparent;
    border-width: 0;
    background-image: -gtk-win32-theme-part(combobox, 1 1);
    color: rgba(0, 0, 0, 0);
}

GtkComboBox.combobox-entry .button:prelight,
GtkComboBox.combobox-entry .button:focused,
GtkComboBox.combobox-entry .button:prelight:focused {
    background-image: -gtk-win32-theme-part(combobox, 1 2);
}
GtkComboBox.combobox-entry .button:active,
GtkComboBox.combobox-entry .button:active:focused,
GtkComboBox.combobox-entry .button:active:prelight,
GtkComboBox.combobox-entry .button:active:focused:prelight {
    background-image: -gtk-win32-theme-part(combobox, 1 3);
}
GtkComboBox.combobox-entry .button:insensitive {
    background-image: -gtk-win32-theme-part(combobox, 1 4);
}

GtkComboBox .separator {
    /* always disable separators */
    -GtkWidget-wide-separators: true;
    -GtkWidget-horizontal-separator: 0;
    -GtkWidget-vertical-separator: 0;
}

/* Notebook */

.notebook {
    background-color: #ffffff;
    border-width: 1px 1px 1px 1px;
    border-style: solid;
    background-origin: padding-box;
    background-clip: border-box;
    background-image: -gtk-win32-theme-part(tab, 9 1, margins(-1 -3 -2 -1));
    border-image: -gtk-win32-theme-part(tab, 9 1, margins(0 -2 -1 0)) 1 1 1 1 repeat;
    -GtkNotebook-tab-overlap: 1;
    -GtkNotebook-tab-curvature: 0;
}

.notebook tab {
    border-width: 0;
    background-image: -gtk-win32-theme-part(tab, 1 1);
    padding: 0px 4px 0px 4px;
}

.notebook tab.left, .notebook tab.right {
    padding: 4px 0px 4px 0px;
}

.notebook tab:active {
    background-image: -gtk-win32-theme-part(tab, 1 3, margins(0 0 -1 0));
}
.notebook tab:active.top {
    padding: 2px 4px 1px 4px;
}

.notebook tab:active.bottom {
    padding: 1px 4px 2px 4px;
}

.notebook tab:active.right {
    padding: 4px 4px 4px 1px;
}

.notebook tab:active.left {
    padding: 4px 1px 4px 4px;
}

/* Toolbar */

.toolbar {
    background-color: transparent;
    border-width: 0;
    background-image: -gtk-win32-theme-part(rebar, 6 1);
}

.toolbar .button,
.toolbar .button:focused {
    background-color: transparent;
    background-image: -gtk-win32-theme-part(toolbar, 1 1);
}

.toolbar .button:prelight,
.toolbar .button:prelight:focused {
    background-image: -gtk-win32-theme-part(toolbar, 1 2);
}

.toolbar .button:active {
    background-image: -gtk-win32-theme-part(toolbar, 1 3);
}

.toolbar .button:active:prelight {
    background-image: -gtk-win32-theme-part(toolbar, 1 6);
}

.toolbar .button:insensitive {
    background-image: -gtk-win32-theme-part(toolbar, 1 4);
}

/* Column headers */

column-header .button,
column-header .button:focus {
    background-color: transparent;
    border-width: 0;
    background-image: -gtk-win32-theme-part(header, 1 1);
}

column-header .button:prelight,
column-header .button:prelight:focus {
    background-image: -gtk-win32-theme-part(header, 1 2);
}

column-header .button:active,
column-header .button:active:prelight,
column-header .button:active:focus,
column-header .button:active:prelight:focus {
    background-image: -gtk-win32-theme-part(header, 1 3);
}

GtkSwitch {
    font: bold condensed 10;
    color: -gtk-win32-color(button, 18);
}

GtkSwitch.slider {
    padding: 4px;
    background-color: transparent;
    background-image: -gtk-win32-theme-part(scrollbar, 2 1, over (8 1));
    border-width: 0;
}

GtkSwitch.trough:insensitive {
    background-image: -gtk-win32-theme-part(button, 1 4);
}

GtkSwitch.trough {
    background-image: -gtk-win32-theme-part(button, 1 1);
}

GtkSwitch.trough:active {
    background-image: -gtk-win32-theme-part(button, 1 2);
}

/* Menus */

.menu {
    background-color: -gtk-win32-color(button, 4);
    border-color: shade (-gtk-win32-color(button, 4), 0.6);
    border-style: solid;
    border-width: 1px;
    padding: 2px;
}

.menuitem {
    color: -gtk-win32-color(button, 7);
}

.menubar .menuitem *:backdrop {
    color: mix (-gtk-win32-color(button, 7), white, 0.5);
}

.menubar > .menuitem {
    padding: 3px 5px;
}

/* Assistant */

GtkAssistant .sidebar .highlight {
    background-color: gray;
    font: bold;
}

GtkAssistant .sidebar {
    padding: 12px;

    background-color: white;

    border-image: none;
    border-width: 0 1px 0 0;
    border-style: solid;
}

GtkColorSwatch {
    border-style: solid;
    border-width: 1px;
}

GtkColorSwatch:prelight {
    border-color: shade (@bg_color, 0.2);
}

.separator,
.separator:prelight {
    color: shade (@bg_color, 0.6);
}

GtkStatusbar > GtkFrame {
    border-width: 1px 1px 1px 1px;
    border-style: solid;
    border-image:  -gtk-win32-theme-part(status, 0 0, margins (-1 0 0 0))  2 1 1 1 stretch;
    background-image: none;
}

/*
 This doesn't quite look right with no background (i.e. when not on a statusbar

.grip {
    background-color: transparent;
    background-image:  -gtk-win32-theme-part(status, 3 1);
}
*/

@keyframes spinner {
   0% { background-image: none,
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.916667)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.833333)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.25)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.416667)), to(transparent)); }
  75% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.25)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)),
                          none,
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.333333)), to(transparent)); }
  75% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.25)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.583333)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.333333)), to(transparent)); }
  83% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)),
                          none,
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.333333)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.25)), to(transparent)); }
  83% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.833333)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.25)), to(transparent)); }
  91% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)),
                          none,
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.916667)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)); }
  91% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)); }
 100% { background-image: none,
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.833333)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)); }
 100% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.916667)), to(transparent)),
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                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)),
                          -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)); }
}

.spinner {
  background-color: transparent;
  background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                    -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent));
  background-position: 25.00% 6.70%, 6.70% 25.00%, 0.00% 50.00%, 6.70% 75.00%, 25.00% 93.30%, 50.00% 100.00%, 75.00% 93.30%, 93.30% 75.00%, 100.00% 50.00%, 93.30% 25.00%, 75.00% 6.70%, 50.00% 0.00%;
  background-size: 20% 20%;
  background-repeat: no-repeat;
  transition: background-image 500ms ease-out;
}

.spinner:active {
   background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.916667)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.833333)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.75)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.666667)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.583333)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.5)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.416667)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.333333)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.25)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.166667)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.0833333)), to(transparent)),
                     -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent));
  animation: spinner 1s infinite linear;
}