gtk3.css

@define-color base_color	#ffffff;
@define-color bg_color		#eaeaea;
@define-color tooltip_bg_color	#eaeaea;
@define-color selected_bg_color	#729fcf;
@define-color text_color	#000000;
@define-color fg_color		#a4a4a4;
@define-color tooltip_fg_color	#2e3436;
@define-color selected_fg_color	#ffffff;

@define-color prelight_bg_color shade(@bg_color, 1.02);
@define-color insensitive_fg_color mix(@fg_color, @base_color, 0.5);

@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);
@define-color transparent rgba(0, 0, 0, 0);


* {
	padding: 1px;

	-GtkStatusbar-has-resize-grip: false;
	-GtkWindow-resize-grip-height: 0;
	-GtkWindow-resize-grip-width: 0;

	color: @text_color;
	border-color: @fg_color;
	border-style: none;
}

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

*:insensitive {
	color: @insensitive_fg_color;
	border-color: @insensitive_fg_color;
}

.background {
	background-color: @bg_color;
	color: @fg_color;
	border-width: 1px;
	border: solid;
}

.tooltip, .tooltip * {
	padding: 4px 4px;
	background-color: @tooltip_bg_color;
	color: @tooltip_fg_color;
}

.button,
.radio,
.check {
	border-style: outset;
	border-width: 1px;
}
.button:prelight:active, .button:hover {
	background-color: @prelight_bg_color;
	color: @fg_color;
}
.button:active {
	background-color: mix(@fg_color, @bg_color, 0.9);
	border-style: inset;
	color: @fg_color;
}

GtkSwitch {
	padding: 2px;
	background-color: @bg_color;
	color: @fg_color;
	border-style: solid;
	border-width: 1px;
}
GtkSwitch.trough:active {
	background-color: @selected_bg_color;
	color: @selected_fg_color;
}
GtkSwitch:prelight, GtkSwitch:hover {
	background-color: @prelight_bg_color;
}

GtkMenu {
	border-style: solid;
	border-width: 1px;
}
.menuitem:active, .menuitem GtkLabel:active,
.menuitem:prelight, .menuitem GtkLabel:prelight,
.menu:active, .menu GtkLabel:active,
.menu:prelight, .menu GtkLabel:prelight,
GtkTreeMenu .menuitem:prelight,
GtkTreeMenu .menuitem *:prelight,
GtkTreeMenu .menuitem:active,
GtkTreeMenu .menuitem *:active {
	background-color: @selected_bg_color;
	color: @selected_fg_color;
}
.menuitem.check:active,
.menuitem.radio:active {
	background-color: @bg_color;
	color: @fg_color;
}
.menuitem.check:prelight, .menuitem.check:hover,
.menuitem.radio:prelight, .menuitem.radio:hover {
	background-color: @selected_bg_color;
	color: @selected_fg_color;
	border-color: @selected_fg_color;
}
.menuitem:insensitive, .menuitem GtkLabel:insensitive,
.menu:insensitive, .menu GtkLabel:insensitive,
GtkTreeMenu:insensitive {
	color: @insensitive_fg_color;
}
.menuitem.separator {
	border: none;
	color: @fg_color;
}

.menubar,
.toolbar,
GtkStatusbar, GtkStatusbar * {
	border-width: 0;
}
.toolbar > *:hover, .toolbar > *:active {
	border-width: 1px;
}

.entry,
.toolbar.entry {
	background-color: @base_color;
	color: @text_color;
	border-width: 1px;
	border-style: solid;
	padding: 2px;
}
.entry:insensitive,
.toolbar.entry {
	color: mix(@fg_color, @base_color, 0.5);
	border-color: mix(@fg_color, @base_color, 0.5);
}

.view {
	background-color: @base_color;
	color: @text_color;
}
.view:insensitive {
	background-color: @bg_color;
}

.scrollbar,
GtkScale {
	-GtkRange-trough-border: 0;

	background-color: @bg_color;
	border-width: 1px;
	border-style: solid;
}
.scrollbar:prelight, .scrollbar:hover,
GtkScale:prelight, GtkScale:hover {
	background-color: @prelight_bg_color;
}
.scrollbar.trough,
GtkScale.trough {
	background-color: mix(@fg_color, @bg_color, 0.8);
}
.scrollbar:insensitive,
GtkScale.entry {
	color: mix(@fg_color, @base_color, 0.5);
	border-color: mix(@fg_color, @base_color, 0.5);
}

.notebook {
	border-width: 1px;
	border-style: solid;
}
.notebook tab {
	background-color: mix(@fg_color, @bg_color, 0.9)
}
.notebook tab:active {
	background-color: @bg_color;
}

GtkProgressBar {
	border-width: 1px;
	border-style: solid;
}
GtkProgressBar.progressbar,
.entry.progressbar {
	background-color: @selected_bg_color;
	color: @selected_fg_color;
	border-width: 0;
	border-radius: 0;
}

.paned {
	background-color: @bg_color;
}
.paned:hover,
.paned:prelight,
.paned:selected {
	background-color: @fg_color;
}

.pane-separator,
.pane-separator:hover,
.pane-separator:prelight,
.pane-separator:selected {
	background-color: @fg_color;
}

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

.grip {
}

.separator, .menu.separator {
	background-color: @fg_color;
}

row {
}
.cell {
}
column-header {
}
column-header .button {
	background-color: @bg_color;
	border-width: 1px 1px 1px 0px;
}
column-header:first-child .button {
	border-width: 1px 1px 1px 1px;
}

GtkExpander:prelight, GtkExpander:hover {
	background-color: @prelight_bg_color;
}

GtkCalendar.view {
}
GtkCalendar.header {
	background-color: @bg_color;
}
GtkCalendar.button {
}
GtkCalendar.highlight {
}

GtkInfoBar {
	border-width: 1px;
	border-style: solid;
}
.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;
}