@media (-moz-bool-pref: "zen.tabs.vertical") {

    /* Prevents stuff from being clipped off from bottom of Essentials */
    #zen-essentials-container, .zen-essentials-container {
        overflow: visible !important;
    }

    /* Makes essentials transparent (when toggled) */
    :root:has(#theme-SuperPins[uc-essentials-color-scheme="transparent"]) {
        .tabbrowser-tab[zen-essential="true"]:not(:hover):not([selected="true"]) .tab-stack .tab-background {
            background-color: transparent !important;
        }
    }

    @media (-moz-bool-pref: "zen.view.sidebar-expanded") and (not (-moz-bool-pref: "zen.view.sidebar-expanded.on-hover")) {

        /* Default essentials-width and essentials-gap variables (set to browser default) to fix some bugs */
        :root {
            --essentials-width: 49px;
            --essentials-gap: calc(var(--zen-toolbox-padding) - 2px);
        }

        /* Set width of Essentials (Dropdown) */
        :root:has(#theme-SuperPins[uc-essentials-width="Thin"]) {
            --essentials-width: 50px;
        }

        :root:has(#theme-SuperPins[uc-essentials-width="Normal"]) {
            --essentials-width: 60px;
        }

        :root:has(#theme-SuperPins[uc-essentials-width="Wide"]) {
            --essentials-width: 70px;
        }

        :root:has(#theme-SuperPins[uc-essentials-width="Thin"],
            #theme-SuperPins[uc-essentials-width="Normal"],
            #theme-SuperPins[uc-essentials-width="Wide"]) {
            #zen-essentials-container, .zen-essentials-container {
                grid-template-columns: repeat(auto-fit,
                        minmax(var(--essentials-width), auto)) !important;
            }

            .zen-essentials-container {
                max-width: calc(100% - var(--zen-toolbox-padding) * 2);
            }

            @media (-moz-bool-pref: "uc.essentials.grid-count") {
                #zen-essentials-container, .zen-essentials-container {
                    grid-template-columns: repeat(var(--mod-superpins-essentials-grid-count), minmax(var(--essentials-width), auto)) !important;
                }
            }
        }

        /* Set margin between Essentials (Dropdown) */
        :root:has(#theme-SuperPins[uc-essentials-gap="Small"]) {
            --essentials-gap: 0px;
        }

        :root:has(#theme-SuperPins[uc-essentials-gap="Normal"]) {
            --essentials-gap: 2px;
        }

        :root:has(#theme-SuperPins[uc-essentials-gap="Big"]) {
            --essentials-gap: 5px;
        }

        :root:has(#theme-SuperPins[uc-essentials-gap="Small"],
            #theme-SuperPins[uc-essentials-gap="Normal"],
            #theme-SuperPins[uc-essentials-gap="Big"]) {
            #zen-essentials-container, .zen-essentials-container {
                gap: var(--essentials-gap) var(--essentials-gap) !important;
            }
        }
    }

    /* Enables legacy layout for pinned tabs (icon only in grid) */
    @media (-moz-bool-pref: "uc.pins.legacy-layout") {
        #navigator-toolbox[zen-sidebar-expanded="true"] {
            & #tabbrowser-tabs {
                & .tabbrowser-tab {
                    &[zen-pinned-changed="true"]:not([zen-essential])
                    > .tab-stack
                    > .tab-content
                    > .tab-icon-stack {
                    position: unset !important;
                    top: unset !important;
                    }
                }
            }
        }

        #vertical-pinned-tabs-container, .zen-workspace-pinned-tabs-section {
            .tabbrowser-tab[pinned]  {
                .tab-close-button, .tab-reset-button,
                .tab-reset-pin-button, .tab-label-container {
                    display: none !important;
                }
            }
        }

        /*disable icon shift when tab was renamed*/
        #navigator-toolbox[zen-sidebar-expanded="true"] {
            & #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
            & .zen-workspace-pinned-tabs-section {
                & .tabbrowser-tab>.tab-stack>.tab-content>.tab-icon-stack {
                    left: unset !important;
                }
            }
        }

        /* Make pinned tabs auto-grow to span full width of row */
        @media (-moz-bool-pref: "uc.pins.auto-grow") {
            #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
            .zen-workspace-pinned-tabs-section {
                display: flex !important;
                flex-wrap: wrap !important;
                flex-direction: row !important;

                &>.tabbrowser-tab {
                    width: auto !important;
                    min-width: var(--tab-pinned-min-width-expanded) !important;
                    flex: 1 1 auto !important;
                }

                &>tab-group {
                    width: 100% !important;
                }
            }

            @media (-moz-bool-pref: "uc.pins.grid-count") {
                /* Logic for pinned tabs that have auto-grow and grid-count. Must use +1 to fix */
                #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
                .zen-workspace-pinned-tabs-section {
                    &>.tabbrowser-tab {
                        width: calc(100% / (var(--mod-superpins-pins-grid-count) + 1)) !important;
                    }
                }
            }
        }

        @media (not (-moz-bool-pref: "uc.pins.auto-grow")) {
            #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
            .zen-workspace-pinned-tabs-section {
                grid-template-columns: repeat(auto-fit, minmax(var(--tab-pinned-min-width-expanded), auto)) !important;
                display: grid !important;
            }

            @media (-moz-bool-pref: "uc.pins.grid-count") {
                #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
                .zen-workspace-pinned-tabs-section {
                    grid-template-columns: repeat(var(auto-fit, --mod-superpins-pins-grid-count), minmax(var(--tab-pinned-min-width-expanded), auto)) !important;
                }
            }
        }

        /*The actual grid layout*/
        #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
        .zen-workspace-pinned-tabs-section {
            &:has(> :nth-child(2)) {
                margin: 0 var(--zen-toolbox-padding) !important;
                padding: 0 var(--zen-toolbox-padding) !important;
                overflow: visible !important;
                padding-bottom: 17px !important;
                gap: 3px 3px !important;
                max-width: calc(100% - var(--zen-toolbox-padding) * 2) !important;
            }

            .tabbrowser-tab {
                --toolbarbutton-inner-padding: 0;
            }

            &>*:not(tab-group) {
                margin: 0 !important;
            }

            &>tab-group .tab-icon-stack {
                margin: auto !important;
            }
        }

        .zen-workspace-pinned-tabs-section {
            position: relative !important;

            .tab-icon-stack {
                margin-left: 50% !important;
                transform: translateX(-50%) !important;
            }
        }

        .vertical-pinned-tabs-container-separator {
            position: absolute !important;
            bottom: 7px !important;
            left: 50% !important;
            transform: translateX(-50%) !important;
            width: calc(100% - var(--zen-toolbox-padding) * 2) !important;
        }

        :root:has(#theme-SuperPins[uc-tabs-show-separator="never"]) {
            .vertical-pinned-tabs-container-separator {
                display: none !important;
            }

            #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
            .zen-workspace-pinned-tabs-section {
                &:has(> :nth-child(2)) {
                    padding-bottom: 5px !important;
                }
            }
        }
    }

    /* Make Essentials look more box like */
    @media (-moz-bool-pref: "uc.essentials.box-like-corners") {
        .tabbrowser-tab[zen-essential="true"] .tab-stack .tab-background {
            border-radius: 5px !important;
        }
    }

    /* If Essentials have a grid count but do not have auto-grow on */
    @media (-moz-bool-pref: "uc.essentials.grid-count") {
        #zen-essentials-container, .zen-essentials-container {
            grid-template-columns: repeat(var(--mod-superpins-essentials-grid-count), minmax(var(--essentials-width), auto)) !important;
        }
    }

    /* Make Essentials auto-grow to span full width of a row */
    @media (-moz-bool-pref: "uc.essentials.auto-grow") {
        .tabbrowser-tab[zen-essential="true"] {
            width: auto !important;
            min-width: var(--essentials-width) !important;
            flex: 1 1 auto !important;
        }

        @media (-moz-bool-pref: "uc.essentials.grid-count") {

            /* For auto-grow with grid-count. must use +1 to fix a bug */
            .tabbrowser-tab[zen-essential="true"] {
                width: calc(100% / (var(--mod-superpins-essentials-grid-count) + 1)) !important;
            }
        }

        #zen-essentials-container, .zen-essentials-container {
            display: flex !important;
            flex-wrap: wrap !important;
            flex-direction: row !important;
            width: 100% !important;
        }

        #navigator-toolbox {
            min-width: min-content !important;
        }
    }

    /* Puts Essentials at the bottom */
    :root:has(#theme-SuperPins[uc-essentials-position="bottom"]) {
        .tabbrowser-tab:not([pinned]), #tabs-newtab-button {
            margin-left: var(--zen-toolbox-padding) !important;
            margin-right: var(--zen-toolbox-padding) !important;
        }

        .zen-workspace-pinned-tabs-section {
            max-width: calc(100% - var(--zen-toolbox-padding) * 3) !important;
            min-width: calc(100% - var(--zen-toolbox-padding) * 3) !important;
            width: calc(100% - var(--zen-toolbox-padding) * 3) !important;
            padding-left: calc(var(--zen-toolbox-padding) * 2) !important;
        }

        .vertical-pinned-tabs-container-separator {
            width: calc(100% - var(--zen-toolbox-padding) * 3) !important;
            margin-left: calc(var(--zen-toolbox-padding) / 2) !important;
        }

        #tabbrowser-arrowscrollbox {
            position: relative !important;
            overflow-x: hidden !important;
        }
        
        .zen-essentials-container {
            position: relative !important;
            margin-top: auto !important;
            padding-top: 8px !important;
        }

        #zen-essentials-container, #zen-essentials {
            order: 999 !important;
        }

        #tabbrowser-arrowscrollbox > zen-workspace {
            padding-top: 0 !important;
        }

        #navigator-toolbox[zen-sidebar-expanded="true"] {
            .zen-essentials-container {
                min-width: 100% !important;
                width: 100% !important;
            }
        }
    }

    /* Adds a little bg to the pinned tabs */
    @media (-moz-bool-pref: "uc.pins.bg") {
        @media (prefers-color-scheme: light) {
            :root {
                --pins-bg-percentage: 40%;
            }
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --pins-bg-percentage: 7%;
            }
        }

        /* background color of pinned tabs in a normal state (not hovered/selected) */
        .tabbrowser-tab[pinned]:not([zen-essential="true"]) .tab-stack .tab-background {
            background-color: color-mix(in srgb, white var(--pins-bg-percentage), transparent) !important;
        }

        /* background color when hovering */
        .tabbrowser-tab[pinned]:not([zen-essential="true"]):hover .tab-stack .tab-background {
            background-color: color-mix(in srgb, white calc(var(--pins-bg-percentage) + 3%), transparent) !important;
        }

        /* background color when selected */
        .tabbrowser-tab[pinned]:not([zen-essential="true"])[selected="true"] .tab-stack .tab-background,
        .tabbrowser-tab[pinned]:not([zen-essential="true"])[multiselected="true"] .tab-stack .tab-background {
            background-color: color-mix(in srgb, white calc(var(--pins-bg-percentage) + 16%), transparent) !important;
        }

        /* background color when selected and hovering*/
        .tabbrowser-tab[pinned]:not([zen-essential="true"])[selected="true"]:hover .tab-stack .tab-background,
        .tabbrowser-tab[pinned]:not([zen-essential="true"])[multiselected="true"]:hover .tab-stack .tab-background {
            background-color: color-mix(in srgb, white calc(var(--pins-bg-percentage) + 18%), transparent) !important;
        }
    }

    /* Adds border to Pins/Essentials (when toggled) */
    :root:has(#theme-SuperPins[uc-superpins-border="essentials"]) {
        #zen-essentials-container, .zen-essentials-container {
            & .tabbrowser-tab[zen-essential="true"] .tab-stack .tab-background {
                border: 1px solid light-dark(color-mix(in srgb, var(--zen-colors-secondary) 80%, black),
                        color-mix(in srgb, var(--zen-colors-secondary) 80%, white)) !important;
            }
        }
    }

    :root:has(#theme-SuperPins[uc-superpins-border="pins"]) {
        .tabbrowser-tab[pinned]:not([zen-essential="true"]) .tab-stack .tab-background,
        #vertical-pinned-tabs-container>.zen-workspace-tabs-section tab-group,
        .zen-workspace-pinned-tabs-section tab-group {
            border: 1px solid light-dark(color-mix(in srgb, var(--zen-colors-secondary) 80%, black),
                    color-mix(in srgb, var(--zen-colors-secondary) 80%, white)) !important;
        }
    }

    :root:has(#theme-SuperPins[uc-superpins-border="both"]) {
        .tabbrowser-tab[pinned] .tab-stack .tab-background,
        #vertical-pinned-tabs-container>.zen-workspace-tabs-section tab-group,
        .zen-workspace-pinned-tabs-section tab-group {
            border: 1px solid light-dark(color-mix(in srgb, var(--zen-colors-secondary) 80%, black),
                    color-mix(in srgb, var(--zen-colors-secondary) 80%, white)) !important;
        }
    }

    /* Let pinned tabs have the same selected styling as essentials */
    @media (-moz-bool-pref: "uc.pins.essentials-layout") {

        /* Specific query to overwrite previous one */
        #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
        .zen-workspace-pinned-tabs-section {
            grid-template-columns: repeat(auto-fit, minmax(var(--essentials-width), auto)) !important;

            &:has(> :nth-child(2)) {
                gap: var(--essentials-gap) var(--essentials-gap) !important;
            }

            &>.tabbrowser-tab {
                min-width: var(--essentials-width) !important;
            }
        }

        @media (-moz-bool-pref: "uc.pins.grid-count") {
            #vertical-pinned-tabs-container>.zen-workspace-tabs-section,
            .zen-workspace-pinned-tabs-section {
                grid-template-columns: repeat(var(auto-fit, --mod-superpins-pins-grid-count), minmax(var(--essentials-width), auto)) !important;
            }
        }
    }

    /* pins height */
    :root:has(#theme-SuperPins[uc-pinned-height="small"]) {
        .zen-workspace-pinned-tabs-section .tabbrowser-tab {
            height: 40px !important;
        } 
    }

    :root:has(#theme-SuperPins[uc-pinned-height="normal"]) {
        .zen-workspace-pinned-tabs-section .tabbrowser-tab {
            height: 50px !important;
        } 
    }

    :root:has(#theme-SuperPins[uc-pinned-height="large"]) {
        .zen-workspace-pinned-tabs-section .tabbrowser-tab {
            height: 60px !important;
        } 
    }

    /* favicon size */
    :root:has(#theme-SuperPins[uc-favicon-size="small"]) {

        .tab-icon-pending,
        .tab-icon-image,
        .tab-sharing-icon-overlay,
        .tab-icon-overlay {
            height: 16px !important;
            width: 16px !important;
        }

        /* No need to scale tab throbber as it is same size. */
    }

    :root:has(#theme-SuperPins[uc-favicon-size="normal"]) {

        .tab-icon-pending,
        .tab-icon-image,
        .tab-sharing-icon-overlay,
        .tab-icon-overlay {
            height: 18px !important;
            width: 18px !important;
        }

        .tab-throbber {
            transform: scale(1.125) !important;
        }
    }

    :root:has(#theme-SuperPins[uc-favicon-size="large"]) {

        .tab-icon-pending,
        .tab-icon-image,
        .tab-sharing-icon-overlay,
        .tab-icon-overlay {
            height: 20px !important;
            width: 20px !important;
        }

        .tab-throbber {
            transform: scale(1.25) !important;
        }
    }

    /* workspace icons size */
    :root:has(#theme-SuperPins[uc-workspace-icon-size="x-small"]) {
        #zen-workspaces-button {
            font-size: x-small !important;
        }
    }

    :root:has(#theme-SuperPins[uc-workspace-icon-size="small"]) {
        #zen-workspaces-button {
            font-size: small !important;
        }
    }

    :root:has(#theme-SuperPins[uc-workspace-icon-size="medium"]) {
        #zen-workspaces-button {
            font-size: medium !important;
        }
    }

    :root:has(#theme-SuperPins[uc-workspace-icon-size="large"]) {
        #zen-workspaces-button {
            font-size: large !important;
        }
    }

    /* current workspace icons size */
    :root:has(#theme-SuperPins[uc-workspace-current-icon-size="small"]) {
        .zen-current-workspace-indicator .zen-current-workspace-indicator-icon {
            font-size: 12px !important;
        }
    }

    :root:has(#theme-SuperPins[uc-workspace-current-icon-size="normal"]) {
        .zen-current-workspace-indicator .zen-current-workspace-indicator-icon {
            font-size: 14.5px !important;
        }
    }

    :root:has(#theme-SuperPins[uc-workspace-current-icon-size="large"]) {
        .zen-current-workspace-indicator .zen-current-workspace-indicator-icon {
            font-size: 16px !important;
        }
    }

    /* Increase margin below Essentials in case the workspace indicator is not visible. */
    @media (not (-moz-bool-pref: "zen.workspaces.show-workspace-indicator")) {
        .zen-current-workspace-indicator {
            display: none !important;
        }

        .zen-essentials-container {
            padding-bottom: 5px;
        }

        :root:has(#theme-SuperPins[uc-tabs-show-separator="essentials-shown"]) {
            #zen-essentials-container, .zen-essentials-container {
                &:has(~ #zen-tabs-wrapper #zen-browser-tabs-container #vertical-pinned-tabs-container .zen-workspace-tabs-section[active="true"] .tabbrowser-tab) {
                    margin-bottom: 8px !important;
                }
            }

            #zen-essentials-container, .zen-essentials-container {
                &:has(> :nth-child(1))~#zen-tabs-wrapper #zen-browser-tabs-container #vertical-pinned-tabs-container>.zen-workspace-tabs-section {
                    min-height: 20px !important;
                }
            }

            #zen-essentials-container, .zen-essentials-container {
                &:has(> :nth-child(1))~#zen-tabs-wrapper #zen-browser-tabs-container #vertical-pinned-tabs-container>.zen-workspace-tabs-section .vertical-pinned-tabs-container-separator {
                    max-height: unset !important;
                }
            }
        }

        :root:not(:has(#theme-SuperPins[uc-tabs-show-separator="essentials-shown"])) {
            #zen-essentials-container, .zen-essentials-container {
                margin-bottom: 8px !important;
            }
        }
    }

    /* Ensure that the browser uses SuperPins dim rather than the built-in dim-pending. */
    .tab-icon-image[pending="true"],
    .tabbrowser-tab[pending="true"] .tab-text {
        opacity: 1 !important;
    }

    /* If dim-type is set to icons. */
    :root:has(#theme-SuperPins[uc-tabs-dim-type="icons"]) {
        .tab-icon-image[pending="true"] {
            opacity: 0.5 !important;
        }
    }

    /* If dim-type is set to text. */
    :root:has(#theme-SuperPins[uc-tabs-dim-type="text"]) {
        .tabbrowser-tab[pending="true"] .tab-text {
            opacity: 0.5 !important;
        }
    }

    /* If dim-type is set to icon + text. */
    :root:has(#theme-SuperPins[uc-tabs-dim-type="both"]) {

        .tab-icon-image[pending="true"],
        .tabbrowser-tab[pending="true"] .tab-text {
            opacity: 0.5 !important;
        }
    }

    @media (-moz-bool-pref: "uc.tabs.strikethrough-on-pending") {
        .tabbrowser-tab[pending="true"] .tab-text {
            text-decoration: line-through !important;
        }
    }

    @media (-moz-bool-pref: "uc.pins.stay-at-top") {
        #zen-browser-tabs-container {
            height: 100% !important;
        }

        #tabbrowser-arrowscrollbox {
            height: 100% !important;
        }

        #tabbrowser-arrowscrollbox>.zen-workspace-tabs-section {
            overflow-y: auto !important;
            overflow-x: hidden !important;
            /* Calculate the height of the bottom workspace section. */
            max-height: calc(100% - 43px) !important;
            box-sizing: border-box !important;
            padding-bottom: 60px !important;
        }

        /* In case workspace indicator is not visible. */
        @media (not (-moz-bool-pref: "zen.workspaces.show-workspace-indicator")) {
            #tabbrowser-arrowscrollbox>.zen-workspace-tabs-section {
                max-height: calc(100% - 5px) !important;
            }
        }

        #zen-tabs-wrapper {
            overflow: hidden !important;
        }

        /* Ensure tab-groups never shrink. */
        tab-group {
            flex: 0 0 auto !important;
        }
    }

    @media (-moz-bool-pref: "uc.pins.active-bg") {
        .zen-workspace-tabs-section .tabbrowser-tab[pinned][selected="true"] .tab-stack .tab-background {
            background-color: var(--mod-superpins-pins-active-bg) !important;
            opacity: 1 !important;
        }

        .zen-workspace-tabs-section .tabbrowser-tab[pinned][selected="true"]:hover .tab-stack .tab-background {
            opacity: 0.8 !important;
            background-color: var(--mod-superpins-pins-active-bg) !important;
        }
    }

    @media (-moz-bool-pref: "zen.workspaces.indicator-name-center") {
        .zen-current-workspace-indicator-name {
            position: absolute;
            left: 0;
            text-align: center;
            width: 100%;
        }
    }

    :root:has(#theme-SuperPins[zen-workspaces-indicator-position="top"]) {
        .zen-current-workspace-indicator {
            top: 0;
        }

        .zen-essentials-container {
            margin-top: 48px;
        }

        .workspace-arrowscrollbox {
            margin-top: 50px;
        }

        zen-workspace {
            padding-top: 0 !important;
        }
    }

    :root:has(#theme-SuperPins[zen-workspaces-indicator-position="bottom"]) {
        .zen-current-workspace-indicator {
            position: fixed !important;
            bottom: 0;
            z-index: 200;
        }

        zen-workspace {
            margin-top: 2px;
        }
    }
}