vscode-extension-samples/custom-editor-sample/media/pawDraw.css

html, body {
	height: 100%;
}

.drawing-canvas {
	width: 100%;
	height: 100%;
	flex: 1;
	display: flex;
	justify-content: center;
	align-items: center;
	background-repeat: repeat;
	flex-direction: column;
}

.drawing-controls {
	position: fixed;
	bottom: 0;
	left: 0;
	width: 100%;
	display: flex;
	justify-content: center;
}

.drawing-controls button {
	position: relative;
	width: 100px;
	height: 100px;
	background: none;
	border: none;
	transform: translateY(30%);
	transition: transform 0.1s linear;
	outline: none;
}

.drawing-controls button.active,
.drawing-controls button:hover {
	transform: translateY(10%);
}

.drawing-controls button:before,
.drawing-controls button:after {
	display: block;
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

.drawing-controls button:before {
	-webkit-mask: url("./paw-color.svg") no-repeat 50% 50%;
}

.drawing-controls button:after {
	background-color: #111;
	-webkit-mask: url("./paw-outline.svg") no-repeat 50% 50%;
}

.drawing-controls button.black:before {
	background-color: #333;
}

.drawing-controls button.white:before {
	background-color: white;
}

.drawing-controls button.red:before {
	background-color: red;
}

.drawing-controls button.green:before {
	background-color: green;
}

.drawing-controls button.blue:before {
	background-color: blue;
}