$threshold-lg: 1200px !default;
$threshold-md: 992px !default;
$threshold-sm: 768px !default;

$width-lg: 460px !default;
$width-md: 390px !default;
$width-sm: 305px !default;
$width-xs: 100% !default;

$sidebar-z-index: 2000 !default;
$sidebar-transition: 500ms !default;

$tab-size: 40px !default;
$tab-font-size: 12pt !default;
$tab-bg: null !default;
$tab-transition: 80ms !default;

$header-fg: $tab-active-fg !default;
$header-bg: $tab-active-bg !default;

$content-bg: rgba(255, 255, 255, 0.95) !default;
$content-padding-vertical: 10px !default;
$content-padding-horizontal: 20px !default;

$move-map-in-xs: true !default;

.sidebar {
    position: absolute;

    top: 0;
    bottom: 0;
    width: $width-xs;

    overflow: hidden;

    z-index: $sidebar-z-index;

    &.collapsed {
        width: $tab-size;
    }

    @media(min-width:$threshold-sm) {
        top: $sidebar-margins;
        bottom: $sidebar-margins;

        transition: width $sidebar-transition;
    }

    @media(min-width:$threshold-sm) and (max-width:$threshold-md - 1px) {
        width: $width-sm;
    }

    @media(min-width:$threshold-md) and (max-width:$threshold-lg - 1px) {
        width: $width-md;
    }

    @media(min-width:$threshold-lg) {
        width: $width-lg;
    }
}

.sidebar-left {
    left: 0;

    @media(min-width:$threshold-sm) {
        left: $sidebar-margins;
    }
}

.sidebar-right {
    right: 0;

    @media(min-width:$threshold-sm) {
        right: $sidebar-margins;
    }
}

.sidebar-tabs {
    top: 0;
    bottom: 0;
    height: 100%;

    .sidebar-left & {
        left: 0;
    }

    .sidebar-right & {
        right: 0;
    }

    background-color: $tabs-bg;

    &, & > ul {
        position: absolute;

        width: $tab-size;

        margin: 0;
        padding: 0;

        list-style-type: none;

        & > li {
            width: 100%;
            height: $tab-size;

            color: $tab-fg;
            @if $tab-bg { background: $tab-bg; }

            font-size: $tab-font-size;

            overflow: hidden;

            transition: all $tab-transition;

            &:hover {
                color: $tab-hover-fg;
                background-color: $tab-hover-bg;
            }

            &.active {
                color: $tab-active-fg;
                background-color: $tab-active-bg;
            }

            &.disabled {
                color: fade-out($tab-fg, 0.6);

                &:hover {
                    @if $tab-bg {
                        background: $tab-bg;
                    } @else {
                        background: transparent;
                    }
                }

                & > a {
                    cursor: default;
                }
            }

            & > a {
                display: block;

                width: 100%;
                height: 100%;

                line-height: $tab-size;

                color: inherit;
                text-decoration: none;
                text-align: center;
            }
        }
    }

    & > ul + ul {
        bottom: 0;
    }
}

.sidebar-content {
    position: absolute;

    .sidebar-left & {
        left: $tab-size;
        right: 0;
    }

    .sidebar-right & {
        left: 0;
        right: $tab-size;
    }

    top: 0;
    bottom: 0;

    background-color: $content-bg;

    overflow-x: hidden;
    overflow-y: auto;

    .sidebar.collapsed > & {
        overflow-y: hidden;
    }
}

.sidebar-pane {
    display: none;

    left: 0;
    right: 0;
    box-sizing: border-box;

    padding: $content-padding-vertical $content-padding-horizontal;

    &.active {
        display: block;
    }

    @media(min-width:$threshold-sm) and (max-width:$threshold-md - 1px) {
        min-width: $width-sm - $tab-size;
    }

    @media(min-width:$threshold-md) and (max-width:$threshold-lg - 1px) {
        min-width: $width-md - $tab-size;
    }

    @media(min-width:$threshold-lg) {
        min-width: $width-lg - $tab-size;
    }
}

.sidebar-header {
    margin: (-$content-padding-vertical) (-$content-padding-horizontal) 0;
    height: $tab-size;
    padding: 0 $content-padding-horizontal;
    line-height: $tab-size;
    font-size: $tab-font-size * 1.2;
    color: $header-fg;
    background-color: $header-bg;

    .sidebar-right & {
        padding-left: $tab-size;
    }
}

.sidebar-close {
    position: absolute;
    top: 0;
    width: $tab-size;
    height: $tab-size;
    text-align: center;
    cursor: pointer;

    .sidebar-left & {
        right: 0;
    }

    .sidebar-right & {
        left: 0;
    }
}

@if $move-map-in-xs {
    .sidebar-left ~ .sidebar-map {
        margin-left: $tab-size;

        @media(min-width:$threshold-sm) {
            margin-left: 0;
        }
    }

    .sidebar-right ~ .sidebar-map {
        margin-right: $tab-size;

        @media(min-width:$threshold-sm) {
            margin-right: 0;
        }
    }
}