* { margin:0;
    /* box-sizing: border-box;   */
    /* border and padding will be included in elements */
}
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    margin:0; padding:0; 
}
.container{ position: relative;}

.content {position:absolute; z-index: 100;}

canvas {
    position:absolute; z-index: 10;
    background-color:rgb(119, 132, 149);  
}