/* base layout */
#mainbox {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100vh;
    transition: transform 0.3s ease, width 0.3s ease;
    overflow: hidden;
}

/* desktop nav */
nav {
    width: 240px;
    flex-shrink: 0;
    background: var(--nav_bkgr);
    z-index: 1;
}

/* desktop content */
main {
    flex: 1;
    margin-left: 0;
}

/* desktop sections container */
#sectionbox {
    display: flex;
    flex-direction: row;
    flex: 1;
    overflow: hidden;
    height: 100%;
    padding: 10px;
    background-color: var(--bkgr);
    gap: 0px;
    transition: transform 0.3s ease;
}

/* hide sections */
#mstdet.hide,
#rel.hide,
#reldet.hide {
    display: none;
    pointer-events: none;
}


/* mobile overlay nav */
@media (max-width: 749px) {

    /* nav close */
    nav {
        position: absolute;
        top: 0;
        left: 0;
        width: 240px;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-240px);
        transition: transform 0.3s ease;
    }

    /* nav open overlay*/
    #mainbox.open nav {
        position: absolute;
        top: 0;
        left: 0;
        width: 240px;
        height: 100vh;
        z-index: 10;
        transform: translateX(0px);
        transition: transform 0.3s ease;
        -webkit-box-shadow: 10px 0px 18px -15px rgba(85, 85, 85, 0.7);
        box-shadow: 10px 0px 18px -15px rgba(85, 85, 85, 0.7);
    }

    /* section positions set by variables */
    #mstdet,
    #rel,
    #reldet {
        position: relative;
        width: var(--width);
        left: var(--left);
        height: var(--height)
    }

    /* hide icon boxes */
    #mst .box_left,
    #reldet .box_right {
        visibility: hidden
    }
}

/* For bigger screens generally */
@media (min-width: 750px) {

    /* hide nav */
    #mainbox {
        width: calc(100% + 240px);
        height: 100vh;
        position: absolute;
        transition: transform 0.3s ease, width 0.3s ease;
        transform: translateX(-240px);
        overflow: hidden;
    }

    /* show nav */
    #mainbox.open {
        width: 100%;
        position: absolute;
        top: 0;
        left: 0;
        transform: translateX(0px);
    }

    /* section positions set by variables */
    section.stack {
        width: var(--width);
        left: var(--left);
        height: var(--height)
    }
}

/* nav + master section */
@media (min-width: 750px) and (max-width: 1499px) {

    /* section side-by-side */
    #mstdet,
    #rel,
    #reldet {
        position: relative;
    }

    /* hide icon boxes */
    #mst .box_left,
    #reldet .box_right {
        visibility: hidden
    }
}

/* nav + master + detail sections */
@media (min-width: 1500px) and (max-width: 2249px) {

    /* hide icon boxes */
    #mst .box_left,
    #mst .box_right,
    #mstdet .box_left,
    #reldet .box_right {
        visibility: hidden
    }
}

/* nav + master + detail + related sections */
@media (min-width: 2250px) and (max-width: 2999px) {

    /* hide icon boxes */
    #mst .box_left,
    #mst .box_right,
    #mstdet .box_left,
    #mstdet .box_right,
    #rel .box_left,
    #reldet .box_right {
        visibility: hidden
    }
}

/* nav + master + detail + related + related detail sections */
@media (min-width: 3000px) {
    /* hide all icon boxes */
    #mst .box_left,
    #mst .box_right,
    #mstdet .box_left,
    #mstdet .box_right,
    #rel .box_left,
    #rel .box_right,
    #reldet .box_left,
    #reldet .box_right {
        visibility: hidden
    }
}

/* --------------- checked --------------- */