style.scss

$width : 900px;
$height: 500px;

#wrapper {
    display: flex;
    flex-direction: row;
    justify-content: center;
    
    #scene {
        position: relative;
        width: $width;
        height: $height;

        canvas {
            width: $width;
            height: $height;
            position: absolute;

            &#main-layer {
                z-index: 2;
            }

            &#background-layer {
                background-image: url("images/back_900x500.png");
                z-index: 1;
            }
        }
    }

    #ui {
        display: flex;
        flex-direction: column;
        justify-content: space-evenly;

        button {
            text-transform: uppercase;
            background-color: blue;
            color: white;
            border: none;
            padding: 10px;
            margin: 10px;
            border-radius: 15px;

            &:hover {
                background-color: rgb(70, 70, 252);
            }

            &:active {
                background-color: rgb(20, 20, 172);
            }
        }
    }
}