body {
    background-color: #eee;
}

.scene-container {
    width: 600px;
    height: 500px;
    border: 1px solid #ccc;
    margin: 10px;
    background-image: url("http://orig02.deviantart.net/8082/f/2010/313/3/1/winter_night_jpg_by_fel_x-d32hxpf.jpg");
}

    .scene-container > canvas {
        width: 100%;
        height: 100%;
    }

.control-box {
    float: left;
    display: block;
    padding: 10px;
    margin: 10px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 2px;
}

.object-properties {
    display: flex;
    flex-direction: column;
}

.input-box {
    display: flex;
    flex-direction: column;
    margin: 5px;
}