/* ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
 * ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
 * ┃ ▄▄▄▄▄█ █▄▄▄▄▄ ▄▄▄▄▄█  ▀▀▀▀▀█▀▀▀▀▀ █ ▀▀▀▀▀█ ████████▌▐███ ███▄  ▀█ █ ▀▀▀▀▀ ┃
 * ┃ █▀▀▀▀▀ █▀▀▀▀▀ █▀██▀▀ ▄▄▄▄▄ █ ▄▄▄▄▄█ ▄▄▄▄▄█ ████████▌▐███ █████▄   █ ▄▄▄▄▄ ┃
 * ┃ █      ██████ █  ▀█▄       █ ██████      █      ███▌▐███ ███████▄ █       ┃
 * ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
 * ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
 * ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
 * ┃ This file is part of the Perspective library, distributed under the terms ┃
 * ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
 * ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
 */

:host {
    --settings-panel-z-index: 10;
    --psp--color: #ff0000;
}

:host(.shift-active) .shift-alt-icon {
    background-color: var(
        --shift-active--color,
        var(--psp-datagrid--pos-cell--color, #1078d1)
    ) !important;
}

:host(.shift-active) {
    #sub-columns {
        .is_column_active.toggle-mode {
            -webkit-mask-image: var(--psp-icon--radio-off--mask-image);
            mask-image: var(--psp-icon--radio-off--mask-image);

            &:before {
                content: var(--psp-icon--radio-off--mask-image);
            }

            &:hover {
                -webkit-mask-image: var(--psp-icon--radio-hover--mask-image);
                mask-image: var(--psp-icon--radio-hover--mask-image);
            }
        }

        .is_column_active.select-mode {
            -webkit-mask-image: var(--psp-icon--checkbox-off--mask-image);
            mask-image: var(--psp-icon--checkbox-off--mask-image);

            &:before {
                content: var(--psp-icon--checkbox-off--mask-image);
            }

            &:hover {
                -webkit-mask-image: var(--psp-icon--checkbox-hover--mask-image);
                mask-image: var(--psp-icon--checkbox-hover--mask-image);
            }
        }
    }

    #active-columns {
        .is_column_active.toggle-mode {
            -webkit-mask-image: var(--psp-icon--radio-on--mask-image);
            mask-image: var(--psp-icon--radio-on--mask-image);

            &:before {
                content: var(--psp-icon--radio-on--mask-image);
            }

            &:not(.required):hover {
                -webkit-mask-image: var(--psp-icon--radio-hover--mask-image);
                mask-image: var(--psp-icon--radio-hover--mask-image);
            }
        }

        .is_column_active.select-mode {
            -webkit-mask-image: var(--psp-icon--checkbox-on--mask-image);
            mask-image: var(--psp-icon--checkbox-on--mask-image);

            &:before {
                content: var(--psp-icon--checkbox-on--mask-image);
            }

            &:not(.required):hover {
                -webkit-mask-image: var(--psp-icon--checkbox-hover--mask-image);
                mask-image: var(--psp-icon--checkbox-hover--mask-image);
            }
        }
    }
}

::slotted(*) {
    pointer-events: var(--override-content-pointer-events);
}

::slotted(:not([slot^="statusbar-extra"]):not([slot^="tab-"])) {
    position: absolute;
    inset: 0;
    background-color: var(--psp--background-color) !important;
    box-shadow:
        2.25px 2.25px 0 2.25px var(--psp--background-color),
        /* down-right */ -2.25px 2.25px 0 2.25px var(--psp--background-color),
        /* down-left */ 2.75px 2.75px 0 2.75px var(--psp-inactive--color),
        -1.75px 2.75px 0 2.75px var(--psp-inactive--color);
}

.overlay ::slotted(:not([slot^="statusbar-extra"]):not([slot^="tab-"])) {
    box-shadow:
        2.25px 2.25px 0 2.25px var(--psp--background-color),
        -2.25px 2.25px 0 2.25px var(--psp--background-color),
        2.75px 2.75px 0 2.75px var(--psp-inactive--color),
        -2.75px 2.75px 0 2.75px var(--psp-inactive--color);
}

::slotted([part="tab"].visible) {
    box-shadow:
        2.25px -2.25px 0 2.25px var(--psp--background-color),
        -2.25px -2.25px 0 2.25px var(--psp--background-color),
        3.5px -2.25px 0 2.25px var(--psp-inactive--color),
        0 12.5px 0 -11.5px var(--psp-inactive--border-color);
}

.overlay ::slotted([part="tab"].visible) {
    box-shadow:
        2.25px -2.25px 0 2.25px var(--psp--background-color),
        -2.25px -2.25px 0 2.25px var(--psp--background-color),
        2.75px -2.75px 0 2.75px var(--psp-inactive--color),
        -2.75px -2.75px 0 2.75px var(--psp-inactive--color),
        0 12.5px 0 -11.5px var(--psp-inactive--border-color);
}

:host input[type="number"]::-webkit-inner-spin-button {
    transform: scale(1.5) translateX(-5px);
    filter: var(--psp-input--filter);
}

:host .sidebar_close_button {
    position: absolute;
    top: 0;
    padding-top: calc(
        (
                var(
                        --psp-plugin-selector--height,
                        var(--psp-status-bar--height, 38px)
                    ) -
                    20px
            ) /
            2
    );
    padding-bottom: calc(
        (
                var(
                        --psp-plugin-selector--height,
                        var(--psp-status-bar--height, 38px)
                    ) -
                    20px
            ) /
            2
    );
    z-index: 10000;
    height: var(
        --psp-plugin-selector--height,
        var(--psp-status-bar--height, 38px)
    );

    &:hover {
        cursor: pointer;
    }

    .sidebar_close_button_inner {
        border-radius: 5px 0 0 5px;
        height: 20px;
        background-color: var(--psp--background-color);
    }

    .sidebar_close_button_inner .icon {
        display: inline-block;
        mask-size: cover;
        -webkit-mask-size: cover;
        background-repeat: no-repeat;
        background-color: var(--psp--color);
        mask-image: var(--psp-icon--drawer-tab--mask-image);
        -webkit-mask-image: var(--psp-icon--drawer-tab--mask-image);

        &:before {
            content: var(--psp-icon--drawer-tab--mask-image);
            visibility: hidden;
        }
    }

    &:hover .sidebar_close_button_inner .icon {
        mask-image: var(--psp-icon--drawer-tab-hover--mask-image);
        -webkit-mask-image: var(--psp-icon--drawer-tab-hover--mask-image);
    }
}

:host #settings_close_button,
:host #column_settings_close_button {
    left: -21px;
}

:host #debug_close_button.sidebar_close_button .sidebar_close_button_inner {
    background-attachment: fixed;
    background: var(--psp-sidebar--background);

    .icon {
        mask-image: var(--psp-icon--drawer-tab-hover--mask-image);
        -webkit-mask-image: var(--psp-icon--drawer-tab-hover--mask-image);
    }
}

:host
    #debug_close_button.sidebar_close_button:hover
    .sidebar_close_button_inner
    .icon {
    mask-image: var(--psp-icon--drawer-tab--mask-image);
    -webkit-mask-image: var(--psp-icon--drawer-tab--mask-image);
}

:host #debug_open_button.sidebar_close_button {
    right: 0px;
    cursor: pointer;

    .sidebar_close_button_inner {
        background-color: transparent;
    }
}

:host #debug_open_button.sidebar_close_button .sidebar_close_button_inner {
    .icon {
        mask-image: var(--psp-icon--drawer-tab-inverted--mask-image);
        -webkit-mask-image: var(--psp-icon--drawer-tab-inverted--mask-image);
    }

    &:hover .icon {
        mask-image: var(--psp-icon--drawer-tab-inverted-hover--mask-image);
        -webkit-mask-image: var(
            --psp-icon--drawer-tab-inverted-hover--mask-image
        );
    }
}

:host #debug_close_button.sidebar_close_button {
    right: 0px;
}

:host(:hover) {
    #menu-bar {
        opacity: 1 !important;
    }
}

:host {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    font-size: 0.75em;

    * {
        box-sizing: border-box;
        line-height: 1.25;
    }

    #component_container {
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        display: flex;
        flex-direction: column;
    }

    #layout_area {
        flex: 1 1 auto;
        position: relative;
        min-height: 0;
        display: flex;
        overflow: hidden;
    }

    #app_panel {
        position: absolute;
        bottom: 0px;
        left: 0;
        right: 0;
        top: 0;
        height: auto;
        flex-direction: row-reverse;
        & > .split-panel-divider {
            border-left: 1px solid var(--psp-inactive--color, #6e6e6e);
            margin-right: -5px;
        }
    }

    #modal_panel {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        overflow: hidden;
        pointer-events: none;
        & > * {
            pointer-events: all;
        }
    }

    #modal_panel.pinned {
        position: static;
        flex: 0 0 auto;
        width: auto;
        pointer-events: all;
        overflow: visible;
    }

    #modal_panel > .split-panel-divider {
        border-left: 1px solid var(--psp-inactive--color, #6e6e6e);
        margin-right: -5px;
    }

    #status_bar {
        height: var(--psp-status-bar--height, 38px);
    }

    #main_column_container {
        position: relative;
        display: flex;
        flex: 1 1 auto;
        overflow: hidden;
    }

    #main_column {
        display: flex;
        flex: 1 1 auto;
        overflow: hidden;
        flex-direction: column;
        position: relative;
        margin: var(--psp-main-column--margin);
        border: var(--psp-main-column--border);
        border-width: var(--psp-main-column--border-width);
        border-radius: var(--psp-main-column--border-radius);
    }

    #main_panel_container {
        z-index: 0;
        position: relative;
        height: 100%;
        box-shadow: var(--plugin--box-shadow, none);
        overflow: hidden;
        border: var(--psp-plugin--border, none);
        background: var(
            --psp-main-column--background,
            var(--psp--background-color, none)
        );

        /* A STAGED panel's hidden staging wrapper (`MainPanel::render` +
           `Workspace::stage_panel`): a freshly-created panel's plugin
           completes its first draw here, laid out at predicted final size
           but unpainted. `visibility` (not `display`) so the plugin keeps a
           real box and a non-null `offsetParent` — draw guards, redraw
           subscriptions and observers behave exactly as for a visible
           panel. */
        & > .psp-staging {
            position: absolute;
            top: 0;
            left: 0;
            overflow: hidden;
            visibility: hidden;
            pointer-events: none;
        }

        & > .psp-staging ::slotted(*) {
            display: block;
            width: 100%;
            height: 100%;
        }

        /* The layout engine hosting this panel's plugin fills the container. */
        & regular-layout {
            position: absolute;
            inset: -4px -4px -4px -4px;
            box-sizing: border-box;
            padding: 0px;
            background: var(--psp--background-color, transparent);

            & > .rl-panel {
                position: relative;
                box-sizing: border-box;
                background: none;
                border: 1px solid transparent;
                margin: var(--psp-panel--margin, 4px);
            }

            & > .rl-panel::part(container) {
                position: relative;
                background: var(--psp--background-color);
                /* box-shadow: 0 0 0 4.5px var(--psp--background-color); */
            }

            & > .rl-panel::part(titlebar-track) {
                gap: 10px;
            }

            & > .rl-panel::part(titlebar) {
                display: flex;
                align-items: stretch;
                height: var(--psp-panel-titlebar--height, 26px);
                font-family: var(--button--font-family, inherit);
                overflow: visible;
            }

            & > .rl-panel::part(tab) {
                display: flex;
                flex: 1 1 auto;
                align-items: center;
                min-width: 0;
                padding: 0 8px;
                cursor: pointer;
                font-size: 11px;
                white-space: nowrap;
                color: var(--psp--color, inherit);
                background: var(--psp--background-color, #ffffff);
            }

            & > .rl-panel::part(title) {
                overflow: hidden;
                text-overflow: ellipsis;
            }

            & > .rl-panel::part(close) {
                flex: 0 0 auto;
                align-self: center;
                display: flex;
                align-items: center;
                justify-content: center;
                width: 16px;
                height: 16px;
                margin: 0 4px;
                border: none;
                background: none;
                cursor: pointer;
                opacity: 0.6;
                color: inherit;
            }

            & > .rl-panel::part(close):hover {
                opacity: 1;
            }

            & > .rl-panel::part(close):before {
                content: "×";
                font-size: 14px;
                line-height: 1;
            }

            & > .rl-panel.single::part(close) {
                display: none;
            }

            &:has(.overlay) > * {
                opacity: 0.7;
            }

            &:has(.overlay) > .overlay {
                opacity: 1;
            }

            & > .overlay {
                /* background: var(
                    --psp-panel-overlay--background,
                    rgba(26, 125, 161, 0.15)
                ); */

                transition:
                    top 0.1s ease-in-out,
                    left 0.1s ease-in-out,
                    width 0.1s ease-in-out,
                    height 0.1s ease-in-out;
            }
        }
    }

    #settings_panel {
        position: relative;
        flex: 0 0 auto;
        padding: 0pc;
        padding-left: 8px;
        box-sizing: border-box;
        width: 100%;
        z-index: var(--settings-panel-z-index);

        & > .split-panel-child {
            overflow: hidden;
        }

        & > .split-panel-divider {
            border-top: 1px solid var(--psp-inactive--color, #6e6e6e);
            border-bottom: 2px solid var(--psp-inactive--color, #6e6e6e);
            margin-left: -9px;
            margin-right: 0px;
            flex: 0 0 4px;
        }
    }

    #column_settings_sidebar .split-panel-divider {
        border-top: 1px solid var(--psp-inactive--color, #6e6e6e);
        border-bottom: 2px solid var(--psp-inactive--color, #6e6e6e);
        margin-left: -9px;
        margin-right: -4px;
        flex: 0 0 4px;
    }

    .noselect {
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        user-select: none;
    }

    .sidebar_column {
        background: var(--psp-sidebar--background);
        background-attachment: fixed;

        display: flex;
        list-style: none;
        flex-direction: column;
        flex: 1;

        /* Needs 2 because it must take precedence over teh chart legend. */
        z-index: 2;
    }

    #plugin_selector {
        margin-top: 3px;
        border-bottom-width: 1px;
        border-style: solid;
        border-color: var(--psp-inactive--color, #c5c9d0);
        border-top-width: 0px;
        border-left-width: 0px;
        border-right-width: 0px;
    }

    #close_button {
        background-color: var(--psp--background-color);
        padding: 0px;
        overflow: hidden;
        display: var(--psp-close-button--display, none);
        align-items: center;
        justify-content: center;
        z-index: 10000;
        border: 1px solid var(--psp-inactive--color);
        border-radius: 5px;
        font-size: 10px;
        font-weight: normal;
        &:hover {
            color: var(--psp--background-color, inherit);
            background-color: var(--psp--color);
            cursor: pointer;
        }

        &:hover .icon {
            background-color: var(--psp--background-color);
        }

        .icon {
            display: inline-block;
            mask-size: cover;
            -webkit-mask-size: cover;
            background-repeat: no-repeat;
            background-color: var(--psp--color);
            mask-image: var(--psp-icon--close--mask-image);
            -webkit-mask-image: var(--psp-icon--close--mask-image);

            &:before {
                content: var(--psp-icon--close--mask-image);
                visibility: hidden;
            }
        }
    }

    .settings_tab_bar_scroll_offset {
        margin-left: -8px;
    }

    #settings_tab_bar {
        display: flex;
        &:after {
            content: " ";
            border-bottom: 1px solid var(--psp-inactive--color);
            background-color: #00000020;
            flex: 1 0 auto;
        }

        .settings_tab {
            border-right: 1px solid var(--psp-inactive--color);
            cursor: pointer;
            padding: 6px 8px;
            font-size: var(--label--font-size, 0.75em);
            text-transform: uppercase;
            flex: 0 1 100px;
            background-color: #00000020;
            border-bottom: 1px solid var(--psp-inactive--color);
            color: var(--psp-inactive--color);
            margin-left: -1px;
            border-left: 1px solid var(--psp-inactive--color);
            &:hover {
                color: inherit;
            }
        }

        .selected_tab {
            color: inherit;
            background-color: transparent;
            border-bottom: 1px solid transparent;
            box-shadow: 0px 9px 0px -8px var(--psp-inactive--color);
            height: calc(100% - 1px);
        }
    }

    .split-panel.orient-reverse
        > .split-panel-child:not(:last-child):not(.is-width-override) {
        max-width: 300px;
    }

    .sidebar_header {
        min-height: calc(
            var(
                    --psp-plugin-selector--height,
                    var(--psp-status-bar--height, 38px)
                ) +
                1px
        );
        z-index: 7;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        justify-content: center;
        border-bottom: 1px solid var(--psp-inactive--color, #6e6e6e);
    }

    .sidebar_header_title {
        padding-left: 9px;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
        margin-right: 30px;
    }

    .sidebar_border {
        height: 2px;
        width: 100%;
        background-color: var(--psp-inactive--color, #6e6e6e);
        margin-top: 1px;
        flex-shrink: 0;
        flex-grow: 0;
    }

    #query_tabbar_tab:before {
        content: var(--psp-label--query-tab--content);
    }

    #plugin_tabbar_tab:before {
        content: var(--psp-label--plugin-tab--content);
    }

    #debug_tabbar_tab:before {
        content: var(--psp-label--debug-tab--content);
    }

    #chat_tabbar_tab:before {
        content: var(--psp-label--chat-tab--content);
    }

    label#stack-label:before {
        content: var(--psp-label--stack--content, "Stack");
    }

    label#alt_axis-label:before {
        content: var(--psp-label--alt-axis--content, "Alt Axis");
    }
}

#chat_panel {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    min-width: 0;
    contain: inline-size;
    padding: 0px;
    gap: 6px;

    #chat_log:empty {
        flex: 0 0 auto;
        padding-bottom: 0px;
        margin-bottom: -6px; /* offset gap */
    }

    #chat_log {
        flex: 1 1 auto;
        min-height: 0;
        overflow-y: scroll;
        display: flex;
        flex-direction: column;
        gap: 6px;
        padding: 12px 6px 6px 2px;
    }

    .chat-message {
        overflow-wrap: anywhere;
        border-radius: 3px;
        padding: 6px 8px;
        max-width: 90%;
        font-size: 1em;
    }

    /* User/error text is NOT markdown-rendered - preserve its whitespace. */
    .chat-user,
    .chat-error {
        white-space: pre-wrap;
    }

    .chat-user {
        align-self: flex-end;
        background-color: var(--psp--background-color);
        border: 1px solid var(--psp-inactive--color, #6e6e6e);
    }

    .chat-assistant {
        align-self: flex-start;
        background-color: #00000010;
        border: 1px solid var(--psp-inactive--color, #6e6e6e);

        /* Markdown content (see `agent/markdown.rs`). */
        p,
        ul,
        ol,
        blockquote,
        pre,
        table,
        h1,
        h2,
        h3,
        h4,
        h5,
        h6,
        hr {
            margin: 0.4em 0;

            &:first-child {
                margin-top: 0;
            }

            &:last-child {
                margin-bottom: 0;
            }
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-size: 1.05em;
            font-weight: 700;
        }

        ul,
        ol {
            padding-inline-start: 1.5em;
        }

        code {
            font-family: inherit;
            background-color: #00000028;
            border-radius: 3px;
            padding: 0 3px;
        }

        pre {
            overflow-x: auto;
            background-color: #00000028;
            border-radius: 3px;
            padding: 6px 8px;

            code {
                background-color: transparent;
                padding: 0;
                white-space: pre;
            }
        }

        blockquote {
            border-left: 2px solid var(--psp-inactive--color, #6e6e6e);
            padding-left: 8px;
            color: var(--psp-inactive--color, #6e6e6e);
        }

        hr {
            border: none;
            border-top: 1px solid var(--psp-inactive--color, #6e6e6e);
        }

        a {
            color: var(--psp-active--color, #1a7da1);
        }

        table {
            border-collapse: collapse;

            th,
            td {
                border: 1px solid var(--psp-inactive--color, #6e6e6e);
                padding: 2px 6px;
            }

            th {
                font-weight: 700;
            }
        }

        .chat-md-align-center {
            text-align: center;
        }

        .chat-md-align-right {
            text-align: right;
        }
    }

    .chat-error {
        align-self: flex-start;
        color: var(--warning--color, #ff471e);
        border: 1px dashed var(--warning--color, #ff471e);
    }

    .chat-tool-chip {
        align-self: flex-start;
        font-size: 0.66em;
        text-transform: uppercase;
        color: var(--psp-inactive--color, #6e6e6e);
        border: 1px solid var(--psp-inactive--color, #6e6e6e);
        border-radius: 3px;
        padding: 1px 6px;
        cursor: default;
    }

    .chat-tool-chip-error {
        color: var(--warning--color, #ff471e);
        border-color: var(--warning--color, #ff471e);
    }

    .chat-reasoning {
        font-size: 0.9em;
        color: var(--psp-inactive--color, #6e6e6e);
        margin-bottom: 0.4em;

        summary {
            cursor: pointer;
            user-select: none;
            &:before {
                text-transform: uppercase;
                content: var(--psp-label--chat-reasoning--content);
                font-size: var(--psp-label--font-size, 0.75em);
            }
        }

        /* The BODY scrolls, not the `<details>` - the summary is the
         * collapse toggle, and auto-scrolling an outer scroller to the
         * bottom would carry it out of view. */
        .chat-reasoning-body {
            white-space: pre-wrap;
            margin-top: 0.4em;
            max-height: 96px;
            overflow-y: auto;
        }
    }

    .chat-pending span {
        display: inline-block;
        width: 4px;
        height: 4px;
        margin-right: 3px;
        border-radius: 50%;
        background-color: var(--psp-inactive--color, #6e6e6e);
        animation: chat-pending-pulse 1.2s infinite ease-in-out;

        &:nth-child(2) {
            animation-delay: 0.2s;
        }

        &:nth-child(3) {
            animation-delay: 0.4s;
        }
    }

    #chat_input_row {
        display: flex;
        gap: 6px;
        flex: 0 0 auto;
        padding-right: 12px;

        /* The input grows downward as it fills; the button stays anchored
         * to the bottom rather than stretching with it. */
        align-items: flex-end;

        /* The prompt is a `MirroredTextarea` (see
         * `form/mirrored-textarea.css`): it is exactly as tall as its
         * text, so this wrapper owns the visible box and caps how far
         * that growth goes before it scrolls instead. */
        #chat_input_scroll {
            flex: 1 1 auto;
            min-width: 0;
            display: flex;
            flex-direction: column;
            min-height: 40px;
            max-height: 160px;
            overflow-y: auto;
            border: 1px solid var(--psp-inactive--color, #6e6e6e);
            border-radius: 3px;

            &:focus-within {
                border-color: var(--psp-active--color, #1a7da1);
            }

            /* Fills the resting box so clicks anywhere in it reach the
             * input, then grows past it with the text. */
            .chat-input-box {
                flex: 1 0 auto;
                padding: 4px 6px;
                font-size: 1em;

                /* The mirror paints the text; the input layer above it is
                 * caret-only (`mirrored-textarea.css`). */
                .mirrored-textarea-mirror {
                    color: inherit;

                    /* The placeholder, as CSS `content` so the intl
                     * label mechanism can localize it - the native
                     * `placeholder` attribute is untranslatable and is
                     * kept only for assistive tech. */
                    &.is-empty:before {
                        content: var(--psp-label--chat-placeholder--content);
                        color: var(--psp-inactive--color, #6e6e6e);
                    }
                }

                /* The wrapper is the scroller - the input must not
                 * scroll independently of the text it mirrors. */
                .mirrored-textarea-input {
                    overflow: hidden;
                }
            }
        }

        button {
            flex: 0 0 auto;
            cursor: pointer;
            font-family: inherit;
            font-size: var(--label--font-size, 0.75em);
            text-transform: uppercase;
            color: inherit;
            background-color: #00000020;
            border: 1px solid var(--psp-inactive--color, #6e6e6e);
            border-radius: 3px;
            padding: 0 10px;

            /* Matches `#chat_input`'s resting `min-height`: the row no
             * longer stretches its children, so this keeps the button
             * square with an empty input and anchored as it grows. */
            height: 40px;
        }

        #chat_send_button:before {
            content: var(--psp-label--chat-send--content);
        }

        #chat_stop_button:before {
            content: var(--psp-label--chat-stop--content);
        }
    }

    #chat_badge {
        flex: 0 0 auto;
        font-size: 0.66em;
        color: var(--psp-inactive--color, #6e6e6e);
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
        margin-bottom: 6px;
    }
}

@keyframes chat-pending-pulse {
    0%,
    80%,
    100% {
        opacity: 0.25;
    }

    40% {
        opacity: 1;
    }
}