:root
{
    --header-height: 50px;
}

#header
{
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    justify-content: center;
    background-color: var(--body-back-color);
    border-bottom: 1px solid var(--gridline-color);
    z-index: 1;

    .container
    {
        width: 100%;
        max-width: var(--max-site-width);
        height: 100%;
        display: flex;
        justify-content: start;
        align-items: center;
        padding-left: 10px;
        padding-right: 10px;

        .title 
        {
            flex-grow: 1;
            display: flex;
            align-items: center;
            color: var(--body-fore-color);
            transition: opacity 0.2s;

            &:hover
            {
                opacity: 75%;
            }

            img
            {
                height: calc(var(--header-height) - 25px);
                padding-right: 10px
            }
        }


        .buttons
        {
            font-size: 12pt;
            display: flex;
            gap: 10px;
            align-items: center;

            .theme-switch
            {
                transform: translateY(-1.5px);
            }
        }
    }
}


body
{
    padding: 0;
    margin: 0;
}

#layoutRoot
{
    padding-top: var(--fixed-header-height);
}


#layoutBare
{
    max-width: 1050px;
    margin: 0 auto;
    padding-top: var(--header-height);
}


:root
{
    --side-panel-width: 250px;
    --max-content-width: 720px;
    --max-site-width: 1420px;
    --no-mans-width: calc((100% - var(--max-site-width)) / 2);
    --fixed-header-height: var(--header-height);
    --scroll-margin-top: var(--header-height);
    --align-content: -1.3rem;
}

.layout-documentation
{
    .mobile-bar
    {
        position: fixed;
        width: 100%;
        height: var(--header-height);
        top: var(--header-height);
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid var(--gridline-color);
        padding-left: 10px;
        padding-right: 10px;
        background-color: var(--body-back-color);
        z-index: 1;
        display: none;

        .menu-button
        {
            display: flex;
            align-items: center;
            font-size: 0.9rem;
            padding: 5px;

            svg
            {
                margin-right: 0.2rem;
            }
        }
    }

    .wrapper
    {
        width: 100%;
        height: 100% - var(--header-height);
    }

    .panel-lhs
    {
        position: fixed;
        top: var(--header-height);
        bottom: 0;
        margin-left: var(--no-mans-width);
        width: var(--side-panel-width);
        background-color: var(--body-back-color);
        z-index: 1;
    }
    .content
    {
        position: relative;
        margin-left: calc((100% - var(--max-content-width)) / 2);
        margin-right: calc((100% - var(--max-content-width)) / 2);
    }
    .panel-rhs
    {
        position: fixed;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        width: var(--side-panel-width);
        margin-right: var(--no-mans-width);

        overflow: auto;
        &::-webkit-scrollbar {
            width: 0px;
            background: transparent; /* make scrollbar transparent */
        }

        background-color: var(--body-back-color);
    }


    .backdrop
    {
        position: fixed;
        left: 0;
        top: 0;
        right: 0;
        bottom: 0;
        background-color: rgb(from var(--back-color) r g b / 75%);
        display: none;
        z-index: 1;
    }
}

@media screen and (width < 1420px) 
{
    :root
    {
        --no-mans-width: 0;
    }
}

@media screen and (width < 1245px) 
{
    .layout-documentation
    {
        .panel-rhs
        {
            display: none;
        }

        .content
        {
            margin-left: calc(var(--side-panel-width) + (100% - (var(--side-panel-width) + var(--max-content-width))) / 2 );
            margin-right: calc((100% - (var(--side-panel-width) + var(--max-content-width))) / 2 );
        }
    }
}

@media screen and (width < 995px) 
{
    :root
    {
        --fixed-header-height: 0;
        --scroll-margin-top: var(--header-height);
        --align-content: 0;
    }

    #header
    {
        position: relative;
        height: var(--header-height);
    }

    .layout-documentation
    {
        .mobile-bar
        {
            position: sticky;
            top: 0;
            display: flex;
        }

        .panel-lhs
        {
            display: none;
        }
        .panel-rhs
        {
        }
        .content
        {
            padding-top: 0;
            width: unset;
            max-width: var(--max-content-width);
            margin: 0 auto;
        }

        .backdrop,
        .panel-lhs,
        .panel-rhs
        {
            transition: opacity 0.25s ease-out, transform 0.25s ease-out;
        }

        .backdrop.active
        {
            display: block;
            opacity: 1;

            &.tx-enter-start,
            &.tx-leave-end
            {
                opacity: 0;
            }
        }   

        .panel-lhs.active
        {
            display: unset;
            margin-left: 0;
            top: 0;
            bottom: 0;
            height: 100%;
            z-index: 100;

            &.tx-enter-start,
            &.tx-leave-end
            {
                transform: translateX(calc(var(--side-panel-width) * -1));
                opacity: 0;
            }
        }

        .panel-rhs.active
        {
            display: flex;
            align-items: stretch;
            top: calc(var(--header-height) * 2 + 1rem);
            left: 15%;
            right: 15%;
            width: 70%;
            height: unset;
            bottom: unset;
            background-color: var(--body-back-color);
            border: 1px solid var(--accent-color);
            border-radius: 0.5rem;
            z-index: 100;
            overflow: hidden;

            nav
            {
                flex-grow: 1;
                position: relative;
                max-height: 50vh;
                overflow: auto;
                padding: 1rem;
            }

            &.tx-enter-start,
            &.tx-leave-end
            {
                transform: translateY(-20px);
                opacity: 0;
            }
        }


        .show-secondary-panel
        {
            &.show-secondary-panel-enter,
            &.show-secondary-panel-leave
            {
                .backdrop,
                .panel-rhs
                {
                    transition: 0.2s ease-out;
                }
            }

            &.show-secondary-panel-start-enter
            {
                .panel-rhs
                {
                    transform: translateY(-20px);
                    opacity: 0;
                }
                .backdrop
                {
                    opacity: 0;
                }
            }

            &.show-secondary-panel-leave
            {
                .panel-rhs
                {
                    transform: translateY(-20px);
                    opacity: 0;
                }
                .backdrop
                {
                    opacity: 0;
                }
            }
        }

        .show-side-panel
        {
            .backdrop
            {
                display: block;
                opacity: 1;
            }

            &.show-side-panel-enter,
            &.show-side-panel-leave
            {
                .backdrop,
                .panel-lhs
                {
                    transition: 0.2s ease-in;
                }
            }

            &.show-side-panel-start-enter
            {
                .panel-lhs
                {
                    transform: translateX(calc(var(--side-panel-width) * -1));
                }
                .backdrop
                {
                    opacity: 0;
                }

            }

            &.show-side-panel-leave
            {
                .panel-lhs
                {
                    transform: translateX(calc(var(--side-panel-width) * -1));
                }
                .backdrop
                {
                    opacity: 0;
                }
            }
        }
    }
}



.next-previous-navigation
{
    border-top: 1px solid var(--gridline-color);
    padding-top: 15px;
    display: flex;
    margin: 0 30px 80px 30px;
    justify-content: space-between;
    a
    {
        font-size: 0.9rem;
    }
    .next
    {
        text-align:right;
    }
    .description
    {
        font-size: 0.8rem;
        color: rgb(from var(--body-fore-color) r g b / 75%);
    }
}


#secondary-nav
{
    padding: 1rem;
    background-color: var(--body-back-color);
    font-size: 0.9rem;

    div.highlight
    {
        background-color: var(--accent-color);
        position: absolute;
        width: 2px;
        left: 7px;
        top: 45px;
        height: 31px;
        border-radius:1px;
        transition: top 0.5s cubic-bezier(0,1,.5,1) , height 0.5s cubic-bezier(0,1,.5,1);
    }

    a.link
    {
        color: var(--subtle-fore-color);
        display: block;
    }
    
    h2.title
    {
        color: var(--subtle-fore-color);
        font-size: 0.8rem;
        text-transform: uppercase;
        margin-top: 0.5rem;
        margin-bottom: 0.5rem;
    }

    .toc0 { margin-top: 0px; font-size: 0.9rem }
    .toc1 { margin-left: 8px; font-size: 0.8rem }
    .toc2 { margin-left: 16px; font-size: 0.8rem }
    .toc3 { margin-left: 24px; font-size: 0.8rem }
    .toc4 { margin-left: 32px; font-size: 0.8rem }
    .toc5 { margin-left: 40px; font-size: 0.8rem }
}



.toc-tree
{
    padding: 0;
    margin: 0;

    a
    {
        display: block;
        color: var(--subtle-fore-color);
        white-space: nowrap;
        border-radius: .2em;
        font-size: 0.8em;
        padding: 0.1em;
        padding-top: 0.2em;
        padding-bottom: 0.2em;
        padding-left: 1.2em;

        .arrow
        {
            display: inline-block;
            transform: translateY(0.2rem);
            width: 1.2em;
        }
    }

    a.has-children
    {
        padding-left: 0;
        padding-top: 0.1em;
    }


    ul
    {
        margin: 0;
        margin-left: 0.5rem;
        padding-left: 0.5rem;
        display: none;
        border-left: 1px solid var(--gridline-color);
    }

    li
    {
        list-style-type: none;
    }

    li.expanded > ul
    {
        display: block;
    }

    li.selected > a
    {
        color: var(--accent-color);
        font-weight: bold;
    }

    li > a:hover
    {
        color: var(--accent-color);
        background-color: rgb(from var(--fore-color) r g b / 10%);
    }

    li > a > span.arrow
    {
        transition:.2s transform ease-in-out;
    }

    li.expanded > a > span.arrow
    {
        transform:translateY(0.2rem) rotate(90deg);
    }
}


.toc-panel
{
    width: 100%;
    height: 100%;
    overflow-y: auto;
    padding-bottom: 30px;
    border-right: 1px solid var(--gridline-color);
    padding-top: 1rem;

    h2
    {
        margin: 0;
        margin-top: 1rem;
        font-size: 0.8rem;
    }

    h2:first-child
    {
        margin-top: 0.5rem;
    }


    &::-webkit-scrollbar { width: 5px; }
    &::-webkit-scrollbar-track { background: transparent; }
    &::-webkit-scrollbar-thumb { background: var(--gridline-color); border-radius: 3px; }

    &.flat
    {
        & > li > a > .arrow
        {
            display: none;
        }
        & > li > a
        {
            padding-left: 1.2rem;
        }   
        & > li > a.has-children
        {
            font-weight: bold;
            text-transform: uppercase;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            cursor: unset;

            &:hover
            {
                color: var(--subtle-fore-color);
                background: unset;
            }

        }   

        & > li > ul
        {
            display: block;
            border-left: none;
        }
    }

}


.document
{
    /* Document padding */
    padding: 0.5rem;

    /* Remove top margin from first heading on page*/
    h1:first-child,
    h2:first-child,
    h3:first-child,
    h4:first-child,
    h5:first-child,
    h6:first-child 
    {
        margin-top: 0;
    }

    /* Fix so that scroll to anchored heading to accounts 
       for header height (and a bit) */
    h1, h2, h3, h4, h5, h6
    {
        scroll-margin-top: calc(var(--scroll-margin-top) + 1rem);
    }

    a.hashlink
    {
        float: left;
        margin-left: -1.3rem;
        opacity: 0;
        transition: opacity .2s;
    }

    h1:hover,
    h2:hover,
    h3:hover,
    h4:hover,
    h5:hover,
    h6:hover
    {
        a.hashlink
        {
            opacity: 1;
        }
    }

}