Source/Design/UI-Window.css
header {
	-webkit-app-region: drag;
	height: 32px;	
	padding: 0px;
    margin: 0px;  
	color: #ADADAD;
	z-index: 100;
}

header ui-icon {
	display: inline-block;
}

header ui-icon[data-name="window"] {
	width: 16px;
	height: 16px;
	margin: 5px;
	background-image: url('../Resources/window_icon.png');
	background-size: 16px 16px;
}

header ui-title {
	display: block;
	position: fixed;
	top: 0px;
	left: 26px;	
	line-height: 32px;
	font-size: 14px;
}

header ui-buttons {
	-webkit-app-region: no-drag;
	position: fixed;
	top: 1px;
	right: 5px;
	z-index: 100;
}

header ui-buttons button[data-action^="window:"] {
	display: block;
	position: relative;
	z-index: 10;
	width: 16px;
	height: 16px;
	background-color: #FFFFFF;
    border: none;
	cursor: pointer !important;
	float: right;
	opacity: 0.5;
	margin: 7px 2px;
	-webkit-mask-repeat: no-repeat;
	-webkit-mask-position: 50%;
}

header ui-buttons button[data-action^="window:"]:hover {
	opacity: 1;	
}

header ui-buttons button[data-action="window:close"] {
	-webkit-mask-image: url('../Resources/window_close.svg');
}

header ui-buttons button[data-action="window:maximize"] {
	-webkit-mask-image: url('../Resources/window_maximize.svg');
}

header ui-buttons button[data-action="window:minimize"] {
	-webkit-mask-image: url('../Resources/window_minimize.svg');
	-webkit-mask-position: 50% 100%;
}

header ui-buttons button[data-action^="window:"] {
	-webkit-mask-size: 11px;
}

header ui-buttons button[data-action="window:restore"] {
	-webkit-mask-image: url('../Resources/window_restore.svg');
	-webkit-mask-size: 16px;
}