* {
    margin: 0; padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
}

body {
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 1em;
    line-height: 1.3em;
}

.stage {
    position: relative;
    width: 100% !important;
    padding-bottom: 55.46875% !important;
    height: 0 !important;
    top: 50%;
    transform: translateY(-50%);
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100% !important;
    height: 100% !important;
}