* {
    margin: 0;
    padding: 0;
}
#canvas {
    height: 100%;
    width: 100%;
}
.menu {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    padding: 5px;
}
.row {
    display: flex;
    flex-direction: row;
    align-items: center;
}
.row label {
    margin-right: 10px;
}