:root{
    --fontHeading: Georgia, "Times New Roman", Times, serif;
    --fontText: "Trebuchet MS", "Lucida Sans Unicode", "Lucida Grande",
        "Lucida Sans", Arial, sans-serif;
    --colorBack: #fff;
    --colorFore: #000;
    --colorAccent: #444;
    --colorAlt: #ddd;
    --blockWeight: 1;
    --blockPadding: 0;
    --blockOpacity: 1;
    --blockBlend: unset;
    --scenePadding: 0;
    --sceneColorBack: #fff;
}

.presenta * {
    box-sizing: border-box;
}


.presenta {
    position: relative;
    /* width: 100%;
        height: 100%; */

    --presenta-pw: 960;
    --presenta-w: 960px;
    --presenta-h: 540px;
    --presenta-vp: 960;
    --presenta-fz: 1;
    --presenta-p: calc(var(--presenta-pw) / var(--presenta-vp));
}