@media screen {

    html, body {
        min-height: 100%;
    }

    body {
        margin: 0;
        font-size: 18px;
        font-family: 'PT Sans', Verdana, sans-serif;
        background: #ffffff;
        line-height: 1.4;
    }

    /*** layout ***/

    #page-wrap {
        position: relative;
    }

    /*** canvas ***/

    #canvas {
        position: fixed;
        top: 0;
        right: 0;
        left: 0;
        height: 100vh;
        z-index: 10;
    }

    #back-to-lib-link {
        display: inline-block;
        position: fixed;
        top: 0;
        right: 0;
        padding: 0.25em 0.5em;
        background: #ee6557;
        color: white;
        text-decoration: none;
        z-index: 20;
        font-size: 0.85em;
    }

    #back-to-lib-link:hover {
        background: black;
    }

    #source-code-link {
        display: inline-block;
        position: fixed;
        bottom: 1em;
        right: 1em;
        padding: 0.25em 0.5em;
        background: #ee6557;
        color: white;
        text-decoration: none;
        z-index: 50;
    }

    #source-code-link:hover {
        background: black;
    }

    /*** content ***/

    #content {
        position: relative;
        z-index: 15;
        touch-action: none; /* disable pull to refresh on mobile */
    }

    #planes {
        overflow: hidden;
        width: 100%;
        height: 100vh;
    }

    #titles {
        display: flex;
        justify-content: center;
        align-items: center;
        position: absolute;
        font-size: 2vw;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
    }

    #titles h1 {
        margin: 0;
        color: #ee6557;
    }

    .plane {
        position: absolute;
        top: 30vh;
        right: 20vw;
        bottom: 30vh;
        left: 20vw;
    }

    .plane img {
        display: none;
    }


    /*** handling errors ***/

    .no-curtains #content {
        touch-action: auto; /* enable pull to refresh on mobile */
    }

    .no-curtains #titles {
        position: relative;
        top: auto;
        right: auto;
        bottom: auto;
        left: auto;
        margin: 5vh auto;
    }

    .no-curtains #planes {
        height: auto;
    }

    .no-curtains .plane {
        display: flex;
        overflow: hidden;
        position: relative;
        top: auto;
        right: auto;
        bottom: auto;
        left: auto;
        width: 75vw;
        height: 60vh;
        margin: 10vh auto;
    }

    .no-curtains .plane img {
        display: block;
        min-width: 100%;
        min-height: 100%;
        object-fit: cover;
    }

}




@media screen and (orientation: portrait) {

    #titles {
        font-size: 4vw;
    }

    .plane {
        position: absolute;
        top: 40vh;
        right: 10vw;
        bottom: 40vh;
        left: 10vw;
    }

}