githubmirror/zulip

web/styles/compose.css
2 040 строк58 KB
Karl Stolley
dropdown_lists: Present gridded list items.
12 авг 2025, 22:41
12 авг 2025, 22:41fce8b57
#compose_buttons {
    text-align: right;
    display: flex;
    column-gap: 4px;
    flex-direction: row;
    /* With precisely controlled line-heights
       in this area, stretch will both center
       and maintain uniform heights between the
       reply button and the new-message button. */
    align-items: stretch;

    .compose_mobile_button {
        /* Keep the new message button sized to match
           adjacent buttons. */
        min-width: inherit;
        padding: 3px 10px;
        border-radius: 4px;
        outline: none;
        /* This is ugly, but necessary to use the
           text + for the compose button. An icon
           would likely be a better choice here.
           1.2em is 16.8px at 14px em. */
        font-size: 1.2em;
        /* 1.2em is 16.8px at 14px em; this
           maintains the 20px em-equivalent compose
           line height, but at a 16.8px em. */
        line-height: 1.19em;
        font-weight: 400;
        color: var(--color-text-default);
        background-color: var(--color-background-compose-new-message-button);
        border: 1px solid var(--color-border-compose-new-message-button);

        &:hover {
            background-color: var(
                --color-background-compose-new-message-button-hover
            );
            border-color: var(--color-border-compose-new-message-button-hover);
        }

        &:active {
            background-color: var(
                --color-background-compose-new-message-button-active
            );
            border-color: var(--color-border-compose-new-message-button-hover);
        }
    }

    .reply_button_container {
        display: flex;
        flex-grow: 1;

        /* Adjust flexbox default `min-width` to allow smaller container sizes. */
        min-width: 0;

        /* Button-like styling */
        border-radius: 4px;
        background-color: var(
            --color-compose-collapsed-reply-button-area-background
        );
        border: 1px solid
            var(--color-compose-collapsed-reply-button-area-border);

        &:hover,
        &:focus {
            background-color: var(
                --color-compose-collapsed-reply-button-area-background-interactive
            );
            border-color: var(
                --color-compose-collapsed-reply-button-area-border-interactive
            );
        }

        #left_bar_compose_reply_button_big,
        #new_conversation_button {
            /* Keep the new message button sized to match
               adjacent buttons. */
            font-size: inherit;
            min-width: inherit;
            padding: 3px 10px;
            outline: none;
            border: none;
            color: var(--color-text-default);
            background: var(--color-compose-embedded-button-background);
            border-radius: 3px;
            line-height: var(--line-height-compose-buttons);
        }

        .compose-reply-button-wrapper {
            flex-grow: 1;
            display: flex;
            overflow: hidden;
        }

        #left_bar_compose_reply_button_big {
            width: 100%;
            text-align: left;
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
        }

        #new_conversation_button {
            /* Remove the  `padding` to prevent margin from affecting parent height. */
            padding: 0 10px;
            min-width: inherit;
            margin: 1px;
            flex-shrink: 0;
            align-self: stretch;

            color: var(--color-compose-embedded-button-text-color);

            &:hover {
                background-color: var(
                    --color-compose-embedded-button-background-hover
                );
                color: var(--color-compose-embedded-button-text-color-hover);
            }
        }
    }

    .mobile_button_container {
        @media (width >= $sm_min) {
            display: none;
        }
    }

    #new_conversation_button,
    .new_direct_message_button_container {
        flex-shrink: 0;
        line-height: var(--line-height-compose-buttons);

        @media (width < $sm_min) {
            /* Override inline style injected by jQuery hide() */
            display: none !important;
        }
    }

    .new_direct_message_button_container {
        display: flex;
    }

    #new_direct_message_button {
        /* Keep the new message button sized to match
           adjacent buttons. */
        align-self: stretch;
        font-size: inherit;
        min-width: inherit;
        line-height: var(--line-height-compose-buttons);
        padding: 3px 10px;
        border-radius: 4px;
        outline: none;
        color: var(--color-text-default);
        background-color: var(--color-background-compose-new-message-button);
        border: 1px solid var(--color-border-compose-new-message-button);

        &:hover {
            background-color: var(
                --color-background-compose-new-message-button-hover
            );
            border-color: var(--color-border-compose-new-message-button-hover);
        }

        &:active {
            background-color: var(
                --color-background-compose-new-message-button-active
            );
            border-color: var(--color-border-compose-new-message-button-hover);
        }
    }
}

/* Main geometry for this element is in zulip.css */
#compose-content {
    background-color: var(--color-compose-box-background);
    padding: 4px 4px 6px;
    border: 1px solid var(--color-border-compose-content);
    border-radius: 9px 9px 0 0;
    box-shadow: 0 0 0 hsl(236deg 11% 28%);
    height: 100%;
    display: flex;
    flex-flow: column;
    box-sizing: border-box;

    &:hover {
        .composebox-buttons > button {
            opacity: 1;
        }
    }
}

.message_comp {
    display: none;
    padding: 0 7px 0 0;

    #compose_banners {
        max-height: min(25vh, 240px);
        overflow-y: auto;
        /* Align to compose controls; that's 112px width,
           plus 4px of grid gap for 116px here. */
        margin-right: calc(var(--compose-send-controls-width) + 4px);
    }
}

.compose_table {
    height: 100%;
    display: flex;
    flex-flow: column;

    #compose-recipient {
        &.compose-recipient-direct-selected {
            #compose_select_recipient_widget_wrapper {
                /* As the DM-pill area expands, we want to
                   hold the DM picker to the first line. */
                align-self: flex-start;
            }

            #compose_select_recipient_widget {
                border-radius: 4px !important;
                /* This height is necessary only for the
                   DM picker, so that it does not stretch
                   open taller with multiple rows of user
                   pills. */
                height: var(--compose-recipient-box-min-height);
            }

            .topic-marker-container {
                /* As the DM-pill area expands, we likewise
                   want to keep the topic marker aligned with
                   the DM picker. */
                align-self: flex-start;
            }
        }

        .topic-marker-container {
            /* Ensure the marker ( < ) stays centered vertically
              with the dropdown, even when adjacent stacking pills
              in, e.g., a group DM. */
            align-self: center;
            display: flex;
            align-items: center;
            /* Ensure horizontal centering, too. */
            justify-content: center;
            /* Disallow shrinking or growth, which can cause
               little layout shifts with pills. */
            flex: 0 0 auto;
            height: var(--compose-recipient-box-min-height);

            .conversation-arrow {
                font-size: 1.1429em; /* 16px / 14px em */
                /* Fix the line-height to the font size
                   to maintain a circle that scales. */
                line-height: 1;
                border-radius: 50%;
                padding: 2px;
                margin: 0 3px;
                color: var(--color-compose-chevron-arrow);
                text-decoration: none;
                cursor: default;
                transition: 0.2s ease-in-out;
                transition-property: background, color;

                &.narrow_to_compose_recipients {
                    background: var(
                        --color-narrow-to-compose-recipients-background
                    );
                    color: var(--color-narrow-to-compose-recipients);
                    cursor: pointer;

                    &:hover {
                        background: var(
                            --color-narrow-to-compose-recipients-background-hover
                        );
                        color: var(--color-narrow-to-compose-recipients-hover);
                    }
                }
            }
        }
    }

    #compose-direct-recipient {
        flex-grow: 1;
        display: grid;
        grid-template-columns: 1fr;
        align-items: stretch;
    }

    .message_header {
        background: none;
        background-color: hsl(0deg 0% 92%);
        border: none;
        border-radius: 0;
        box-shadow: none !important;
    }

    .messagebox {
        box-shadow: none !important;
    }
}

#send_message_form {
    margin: 0;
    height: 100%;

    .messagebox {
        /* normally 5px 14px; pull in the right and bottom a bit */
        cursor: default;
        flex: 1;
        padding: 0;
        background: none;
        box-shadow: none;
        border: none;
        height: 100%;
        display: grid;
        /* Vlad's design calls for 122px for the send column
           at its widest; 112px accounts for 6px of gap and
           4px outside padding. */
        grid-template:
            minmax(0, 1fr) var(--compose-formatting-buttons-row-height)
            / minmax(0, 1fr) var(--compose-send-controls-width);
        grid-template-areas:
            "message-content-container message-send-controls-container"
            "message-formatting-controls-container message-send-controls-container";
        gap: 0 4px;
    }

    .message_content {
        margin-right: 0;
    }
}

#message-content-container {
    grid-area: message-content-container;
    display: grid;
    grid-template: minmax(0, 1fr) / minmax(0, 1fr) var(
            --composebox-buttons-width
        );
    grid-template-areas: "message-content composebox-buttons";
    border-radius: 4px;
    border: 1px solid var(--color-message-content-container-border);
    transition: border-color 0.2s ease;

    &:has(.new_message_textarea:focus) {
        border-color: var(--color-message-content-container-border-focus);
    }

    &:has(.new_message_textarea.invalid),
    &:has(.new_message_textarea.invalid:focus) {
        border-color: var(--color-invalid-input-border);
        box-shadow: var(--color-invalid-input-box-shadow);
    }
}

#message-content-container:has(.new_message_textarea.textarea-over-limit),
.edit-content-container:has(.message_edit_content.textarea-over-limit) {
    box-shadow: 0 0 0 1pt
        var(--color-message-content-container-border-over-limit);
}

#message-content-container:has(
        .new_message_textarea.textarea-approaching-limit
    ),
.edit-content-container:has(.message_edit_content.textarea-approaching-limit) {
    box-shadow: 0 0 0 1pt
        var(--color-message-content-container-border-approaching-limit);
}

#message-content-container:has(.new_message_textarea.textarea-over-limit.flash),
#message-content-container:has(
        .new_message_textarea.textarea-approaching-limit.flash
    ),
.edit-content-container:has(.message_edit_content.textarea-over-limit.flash),
.edit-content-container:has(
        .message_edit_content.textarea-approaching-limit.flash
    ) {
    /* This should align with the timing in compose_validate.validate_message_length. */
    animation: message-limit-flash 0.5s ease-in-out 1;
}

#message-content-container .composebox-buttons {
    grid-area: composebox-buttons;
    /* z-index is needed to avoid flickering of cursor and the
    button when hovering it in preview mode. */
    z-index: 1;
    height: max-content;

    button {
        width: 24px;
        /* Override any UA stylesheet padding, such as that
           added by mobile Safari. */
        padding: 0;
        border: none;
        aspect-ratio: 1 / 1;
        background-color: var(--color-composebox-button-background);
        color: var(--color-composebox-button);
        border-radius: 3px;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition:
            opacity 0.4s ease-in,
            color 0.1s ease-in,
            background-color 0.1s ease-in;

        &:hover {
            background-color: var(--color-composebox-button-background-hover);
            color: var(--color-composebox-button-hover);
        }

        &:focus {
            outline: 0;
        }

        &:focus-visible {
            outline: 2px solid var(--color-outline-focus);
        }
    }

    .collapse-composebox-button,
    .maximize-composebox-button {
        display: none;
    }
}

#compose-textarea,
#preview-message-area-container {
    grid-area: message-content;
}

#compose-textarea,
#preview_message_area {
    margin-right: calc(var(--composebox-buttons-width) * -1);
    padding-right: var(--composebox-buttons-width);
    background-color: var(--color-compose-message-content-background);
    color: var(--color-text-default);

    &.textarea-over-limit {
        background-color: var(
            --color-compose-message-content-background-over-limit
        );
    }

    &.textarea-approaching-limit {
        background-color: var(
            --color-compose-message-content-background-approaching-limit
        );
    }
}

.surround-formatting-buttons-row {
    /* This is to extend it under the formatting buttons
       row, so that any border / box-shadow styles applied
       to it surround the formatting buttons row as well. */
    padding-bottom: var(--compose-formatting-buttons-row-height);
    /* The extra 1px of margin-bottom is to ensure the 1px of
       border-bottom shows below the formatting buttons row. */
    margin-bottom: calc(
        (var(--compose-formatting-buttons-row-height) + 1px) * -1
    );

    textarea {
        /* Flatten the bottom edge of the textarea to
           merge with the flat top edge of the buttons row */
        border-radius: 3px 3px 0 0;
    }
}

#preview-message-area-container {
    /* Keep preview container invisible outside
       of preview mode. */
    display: none;
}

#message-send-controls-container {
    grid-area: message-send-controls-container;
    /* A columnar flex does a nice job here
       holding Drafts to the top of the
       container, and the send button to
       the bottom--even as the compose box
       expands or contracts. */
    display: flex;
    flex-direction: column;
    /* With a columnar flex, this ensures that
       send controls occupy the same space as
       the adjacent textbox. */
    justify-content: space-between;
    /* We add 6px of margin to the grid-gap of
       6px, for 12px of space between the Send
       button and the textarea. */
    margin-left: 6px;

    @media (width < $sm_min), ((width >= $sm_min) and (width < $mc_min)) {
        margin-left: 0;
    }
}

#message-formatting-controls-container {
    grid-area: message-formatting-controls-container;
    border-radius: 0 0 3px 3px;
    background-color: var(--color-message-formatting-controls-container);
    /* margin on either side to let the border of
       .message-content-container show through. */
    margin: 0 1px;
}

.compose-scrolling-buttons-container {
    display: grid;
    /* The scroller buttons are set to a 48px width that does not scale;
       the idea being that that's a generous target area, and that it
       would be better not to consume more space at larger font sizes
       under narrower screen sizes. */
    grid-template-columns:
        [scroller-backward-start buttons-start] 48px [scroller-backward-end] minmax(
            0,
            1fr
        )
        [scroller-forward-start] 48px [scroller-forward-end buttons-end];
    grid-template-rows: auto;
}

.compose-scrollable-buttons {
    grid-area: buttons;
    overflow-x: scroll;
    scrollbar-width: none;
    scroll-behavior: smooth;
}

.formatting-control-scroller-button {
    z-index: 5;
    display: flex;
    align-items: center;

    border-radius: 0;
    border: 0;

    color: var(--color-compose-scroll-icon);
    background: transparent;

    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;

    &:focus {
        outline: 0;
    }
}

.formatting-scroller-backward {
    grid-area: scroller-backward;
    justify-content: flex-start;
    border-radius: 0 0 0 3px;
    background: var(--gradient-compose-scroll-backward);

    &:hover {
        background: var(--gradient-compose-scroll-backward-hover);
    }

    &:active {
        background: var(--gradient-compose-scroll-backward-active);

        .scroller-backward-icon {
            /* Subtly shift arrow in scroll direction. */
            margin-left: -2px;
        }
    }
}

.formatting-scroller-forward {
    grid-area: scroller-forward;
    justify-content: flex-end;
    border-radius: 0 0 3px;
    background: var(--gradient-compose-scroll-forward);

    &:hover {
        background: var(--gradient-compose-scroll-forward-hover);
    }

    &:active {
        background: var(--gradient-compose-scroll-forward-active);

        .scroller-forward-icon {
            /* Subtly shift arrow in scroll direction. */
            margin-right: -2px;
        }
    }
}

.can-scroll-backward .formatting-scroller-backward,
.can-scroll-forward .formatting-scroller-forward {
    opacity: 1;
    pointer-events: all;
}

/* Hide the scroller buttons when someone has reached
   the formatting bar via Tab. Scroller-button state
   silently updates despite their being hidden, and
   scroller buttons reappear once focus has moved out
   of the formatting bar. */
.compose-scrolling-buttons-container:has(
        .compose-scrollable-buttons:focus-within
    ) {
    .formatting-scroller-backward,
    .formatting-scroller-forward {
        opacity: 0;
        pointer-events: none;
    }
}

.message-limit-indicator:not(:empty) {
    font-size: 0.8571em; /* 12px at 14px/em */
    color: var(--color-limit-indicator);
    width: max-content;

    /* Keep the limit indicator just above
       and aligned with the send button.
       `:not(:empty)` prevents the padding
       and margin-top from affecting layout
       in the controls area when no indicator
       is present. */
    margin-top: auto;
    padding: 3px 3px 3px 0;

    &.textarea-over-limit {
        color: var(--color-limit-indicator-over-limit);
        font-weight: bold;
    }
}

#compose {
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 4;
}

#compose-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin: auto;
}

#compose_top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    /* Matched to 4px grid-gap on .messagebox grid. */
    padding-bottom: 4px;
    /* Align to compose controls; that's 112px width,
       plus 4px of grid gap for 116px here. */
    margin-right: calc(var(--compose-send-controls-width) + 4px);
}

#compose_close {
    position: absolute;
    top: 0;
    right: 0;
    color: var(--color-compose-send-control-button);
    background: transparent;
    /* 12.5px at 14px em */
    font-size: 0.8928em;
    font-weight: normal;
    /* 3px 7px at 12.5px font size at 14px em */
    line-height: 1.6em;
    opacity: 0.7;
    border: 0;
    /* 3px 7px at 12.5px font size at 14px em */
    padding: 0.24em 0.56em;
    border-radius: 8px;
    vertical-align: unset;
    text-shadow: none;

    &:hover {
        opacity: 1;
        background: var(--color-compose-embedded-button-background-hover);
        color: var(--color-compose-send-control-button-interactive);
    }

    &:active {
        background-color: var(
            --color-compose-embedded-button-background-interactive
        );
    }

    &:focus:not(:focus-visible) {
        outline: none;
    }

    &:focus-visible {
        outline-color: var(--color-compose-focus-ring);
    }
}

.main-view-banner {
    /* This is same spatial value as the 4px of padding around
       the edge of the compose box. */
    margin-bottom: 4px;
    border-radius: 5px;
    border: 1px solid;
    display: flex;
    align-items: center;
    line-height: 1.2em; /* 18px at 15px/1em. */

    .above_compose_banner_action_link {
        color: var(--color-main-view-banner-action-link);
    }

    .main-view-banner-elements-wrapper {
        display: flex;
        align-items: center;
        /* Allow this flex container to grow or
           shrink to fit the outer container. */
        flex: 1 1 auto;
        /* Allow items to wrap; this supports an
           intrinsic layout for banner text and
           buttons, which will always occupy the
           space available, without our having
           to fiddle with tons of media queries. */
        flex-wrap: wrap;
    }

    & .banner_content {
        /* Override Bootstrap when .banner_content is
           a paragraph element. */
        margin: 0;
        /* 5px right padding + 10px left-margin of the neighbouring button will match the left padding */
        padding: 8px 5px 8px 15px;
        /* The banner text uses a flex-basis of 150px,
           which is roughly the width at which banner
           text lines are still comfortably readable.
           Still, it can grow and shrink as needed. */
        flex: 1 1 150px;

        & .banner_message {
            /* Override Bootstrap when .banner_content
               contains an inner .banner_message
               paragraph. */
            margin: 0;
        }
    }

    .main-view-banner-action-button,
    .upload_banner_cancel_button {
        border: none;
        border-radius: 4px;
        padding: 5px 10px;
        font-weight: 600;
        margin-top: 4.5px;
        margin-bottom: 4.5px;
        /* Buttons take a minimum height for
           when their text fits on a single
           line. 2.1333em is 32px at 15px/1em. */
        min-height: 2.1333em;
        /* When we're larger than large mobile
           scales ($ml_min), flex the button to
           its max-content, i.e., all its text
           on a single line. But do not grow in
           order to avoid awkward, oversized
           buttons within the flex group. */
        flex: 0 1 max-content;
        /* Use this margin-left hack to keep
           the button to the righthand side of
           the banner. */
        margin-left: auto;

        @media (width < $ml_min) {
            /* When we're smaller than large mobile
               scales, we allow the button to grow,
               so that it can span the full width of
               narrow, mobile-scale banners as it
               wraps onto a second line.

               We also allow the button to shrink,
               so that, for example, the text can
               wrap on the schedule-message button
               that appears when undoing a scheduled
               message. */
            flex: 1 1 max-content;
            /* Use a 10px left margin to keep the
               button away from the edge of the
               banner box to match the banner text;
               we need this only at small scales,
               when the button grows to the full
               width of the flex container. */
            margin-left: 10px;
        }
        /* Extra margin to ensure the layout is identical when there is no
           close button. */
        &.right_edge {
            margin-right: 10px;
        }
    }

    .main-view-banner-action-button {
        /* Establish a uniform top and bottom
           space around the button, which also
           works with the space around the message
           text. */
        margin-top: 8px;
        margin-bottom: 8px;
        /* Make as tall as two lines of banner message
           text, which have a line-height of 18px, but
           no more. 2.4em is two 1.2em lines in the
           banner area. */
        max-height: 2.4em;
        /* Keep to the top of the box, but stretch
           taller based on how the box is flexing. */
        min-height: 0;
        align-self: stretch;
    }

    .main-view-banner-close-button {
        text-decoration: none;
        /* Set same top and bottom margin
           as action buttons. */
        margin: 8px 0;
        padding: 0 8px;
        /* Let the close button's box stretch,
           but no larger than the height of the
           banner box when the action button
           achieves its full height (margin,
           padding, and height), which keeps
           the X vertically centered with it. */
        align-self: stretch;
        /* 2.4em is two 1.2em lines in the
           banner area. */
        max-height: 2.4em;
        /* Display as flexbox to better control
           the X icon's position. This creates
           an anonymous flexbox item out of the
           ::before content where the icon sits. */
        display: flex;
        align-items: center;
    }

    .banner_content + .main-view-banner-close-button {
        /* When there's no action button, set the max
           height for the typical height of the box
           when it contains only banner message text.
           This will keep the action button aligned
           with the first or only line of text.
           2.2667 is 34px at 15px/1em; */
        max-height: 2.2667em;
    }

    &.success {
        background-color: var(--color-background-success-main-view-banner);
        border: 1px solid var(--color-border-success-main-view-banner);
        color: var(--color-success-main-view-banner);

        .main-view-banner-close-button {
            color: var(--color-success-main-view-banner-close-button);

            &:hover {
                color: var(--color-success-main-view-banner-close-button-hover);
            }

            &:active {
                color: var(
                    --color-success-main-view-banner-close-button-active
                );
            }
        }

        .main-view-banner-action-button {
            background-color: var(
                --color-background-success-main-view-banner-action-button
            );
            color: inherit;

            &:hover {
                background-color: var(
                    --color-background-success-main-view-banner-action-button-hover
                );
            }

            &:active {
                background-color: var(
                    --color-background-success-main-view-banner-action-button-active
                );
            }
        }
    }

    /* warning and warning-style classes have the same CSS; this is since
    the warning class has some associated javascript which we do not want
    for some of the banners, for which we use the warning-style class. */
    &.warning,
    &.warning-style {
        background-color: var(--color-background-warning-main-view-banner);
        border-color: var(--color-border-warning-main-view-banner);
        color: var(--color-warning-main-view-banner);

        .main-view-banner-close-button {
            color: var(--color-warning-main-view-banner-close-button);

            &:hover {
                color: var(--color-warning-main-view-banner-close-button-hover);
            }

            &:active {
                color: var(
                    --color-warning-main-view-banner-close-button-active
                );
            }
        }

        .main-view-banner-action-button {
            background-color: var(
                --color-background-warning-main-view-banner-action-button
            );
            color: var(--color-warning-main-view-banner-action-button);

            &:hover {
                background-color: var(
                    --color-background-warning-main-view-banner-action-button-hover
                );
            }

            &:active {
                background-color: var(
                    --color-background-warning-main-view-banner-action-button-active
                );
            }
        }
    }

    &.error {
        background-color: var(--color-background-error-main-view-banner);
        border-color: var(--color-border-error-main-view-banner);
        color: var(--color-error-main-view-banner);

        .main-view-banner-close-button {
            color: var(--color-error-main-view-banner-close-button);

            &:hover {
                color: var(--color-error-main-view-banner-close-button-hover);
            }

            &:active {
                color: var(--color-error-main-view-banner-close-button-active);
            }
        }

        .main-view-banner-action-button {
            background-color: var(
                --color-background-error-main-view-banner-action-button
            );
            color: var(--color-error-main-view-banner-action-button);

            &:hover {
                background-color: var(
                    --color-background-error-main-view-banner-action-button-hover
                );
            }

            &:active {
                background-color: var(
                    --color-background-error-main-view-banner-action-button-active
                );
            }
        }
    }

    &.info {
        position: relative;
        background-color: var(--color-background-info-main-view-banner);
        border-color: var(--color-border-info-main-view-banner);
        color: var(--color-info-main-view-banner);

        .main-view-banner-close-button {
            color: var(--color-info-main-view-banner-close-button);

            &:hover {
                color: var(--color-info-main-view-banner-close-button-hover);
            }

            &:active {
                color: var(--color-info-main-view-banner-close-button-active);
            }
        }

        .main-view-banner-action-button,
        .upload_banner_cancel_button {
            background-color: var(
                --color-background-info-main-view-banner-action-button
            );
            color: var(--color-info-main-view-banner-action-button);

            &:hover {
                background-color: var(
                    --color-background-info-main-view-banner-action-button-hover
                );
            }

            &:active {
                background-color: var(
                    --color-background-info-main-view-banner-action-button-active
                );
            }
        }
    }
}

.upload_banner {
    overflow: hidden;

    &.hidden {
        display: none;
    }

    .moving_bar {
        position: absolute;
        width: 0;
        /* The progress updates seem to come every second or so,
        so this is the smoothest it can probably get. */
        transition: width 1s ease-in-out; /* stylelint-disable-line plugin/no-low-performance-animation-properties */
        background: var(--color-background-main-view-banner-moving-bar);
        top: 0;
        bottom: 0;
    }

    /* Keep these elements visible above the
       .moving_bar element on file uploads. */
    .upload_msg,
    .main-view-banner-close-button,
    .upload_banner_cancel_button {
        z-index: 1;
        position: relative;
    }
}

.composition-area {
    position: relative;
    flex: 1;
}

@keyframes message-limit-flash {
    0% {
        box-shadow: none;
    }

    100% {
        box-shadow: 0 0 0 1pt
            var(--color-message-content-container-border-over-limit);
    }
}

textarea.new_message_textarea {
    display: table-cell;
    padding: 5px 5px 0;
    height: 1.5em;
    max-height: 22em;
    margin: 0;
    resize: none !important;
    border-radius: 3px 3px 0 0;
    border: none;
    scrollbar-width: thin;
    scrollbar-color: hsl(0deg 0% 50%) transparent;
    box-shadow: none;

    &:focus {
        outline: 0;
    }

    &:read-only,
    &:disabled {
        background-color: hsl(0deg 0% 93%);
    }
}

#message-content-container,
#compose_recipient_box {
    color: var(--color-text-default);
}

#compose_recipient_box {
    display: grid;
    /* When displaying #topic-not-mandatory-placeholder,
       we let it occupy the entire topic box. Otherwise,
       we set and preserve named areas for the ordinary
       topic text and the clear-topic button. */
    grid-template-columns:
        [topic-box-start topic-start] minmax(0, 1fr)
        [topic-end topic-clear-button-start] auto [topic-clear-button-end topic-box-end];
    grid-template-rows: [topic-box-start topic-start topic-clear-button-start] auto [topic-clear-button-end topic-end topic-box-end];
    align-content: center;
    align-items: stretch;
    flex: 1 1 0;
    border: 1px solid var(--color-compose-recipient-box-border-color);
    border-radius: 4px;
    transition: border-color 0.2s ease;
    background: var(--color-compose-recipient-box-background-color);

    &:hover {
        border-color: var(--color-compose-recipient-box-hover);
    }

    /* Give the recipient box, a `<div>`, the
       correct styles when focus is in the
       #stream_message_recipient_topic `<input>` */
    &:focus-within {
        border-color: var(--color-compose-recipient-box-has-focus);
    }

    #stream_message_recipient_topic,
    #recipient_box_clear_topic_button {
        background: none;
        border: none;

        &:disabled {
            cursor: default;
            opacity: 1;
        }
    }

    /* Styles for input in the recipient_box */
    #stream_message_recipient_topic {
        grid-area: topic;
        color: var(--color-compose-recipient-box-text-color);
        /* Keep the line-height matched to the font-size
           for a more predictable box height.
           This will have to be watched very closely for
           possible regressions, such as when Unicode emoji
           appear in the topic box. */
        line-height: 1;
        /* Override grid's effective `max-content` min-width */
        overflow: hidden;
        text-overflow: ellipsis;

        box-shadow: none;
        outline: none;

        padding: 0 6px;
        /* Reset height to let `align-items: stretch` on the grid parent handle this. */
        height: auto;

        &.empty-topic-display::placeholder {
            color: var(--color-compose-recipient-box-text-color);
        }
    }

    #topic-not-mandatory-placeholder {
        grid-area: topic-box;
        align-self: center;
        white-space: nowrap;
        overflow-x: hidden;
        text-overflow: ellipsis;
        padding: 5px 6px;
        display: none;
        visibility: hidden;
        pointer-events: none;

        &.visible {
            visibility: visible;
        }
    }

    /* Styles for new conversation button in the recipient_box */
    #recipient_box_clear_topic_button {
        grid-area: topic-clear-button;
        /* Set the border radius smaller, relative to the parent */
        border-radius: 2px;
        padding: 6px;
        margin: 1px;
        color: var(--color-compose-embedded-button-text-color);

        .zulip-icon {
            display: block;
        }

        &:hover {
            background-color: var(
                --color-compose-embedded-button-background-hover
            );
            color: var(--color-compose-embedded-button-text-color-hover);
        }

        &:focus {
            outline: 0;
        }
    }

    #stream_message_recipient_topic:not(.empty-topic-display):placeholder-shown
        ~ #recipient_box_clear_topic_button {
        visibility: hidden;
    }

    #stream_message_recipient_topic:disabled
        ~ #recipient_box_clear_topic_button {
        visibility: hidden;
    }
    /* This will reset the bootstrap margin-bottom: 10px value for the inputs */
    & input {
        margin-bottom: 0;
    }

    &.disabled {
        background-color: transparent;
        border-color: transparent;
        max-width: fit-content;
    }
}

#compose_select_recipient_widget {
    /* We set width to 100% to get the ellipsis when
       needed, but the flex and max-width properties
       on the widget wrapper ultimately determine
       how much space the channel picker occupies. */
    width: 100%;
    outline: none;
    /* We override the component-level colors to
       ensure concord with the topic box. */
    color: var(--color-compose-recipient-box-text-color);
    background-color: var(--color-compose-recipient-box-background-color);
    border-color: var(--color-compose-recipient-box-border-color);

    &:hover,
    &.widget-open {
        border-color: var(--color-compose-recipient-box-hover);
    }

    &.dropdown-widget-button {
        /* We control the surrounding space through the
           grid on `.dropdown_widget_value`. */
        padding: 0;
        border-radius: 4px;
    }

    .dropdown_widget_value {
        text-overflow: ellipsis;
        overflow: hidden;
    }
}

#private_message_recipient.recipient_box {
    width: 100%;
}

/* We want transitions to run only on user interactions with
   the mouse, once the compose box is open. Any keyboard
   interactions (e.g., Shift-Tabbing from the compose textarea
   to the topic box) show instant changes, so we don't need to
   accommodate them here. */
#compose.compose-box-open:hover {
    .low-attention-recipient-row {
        #compose_select_recipient_widget,
        #compose_recipient_box,
        #compose-direct-recipient .pill-container {
            transition: var(--compose-recipient-row-transition);
            transition-delay: var(--compose-recipient-row-transition-delay);
            transition-property: background-color, border-color;
        }

        #compose_select_recipient_widget .channel-privacy-type-icon {
            transition: var(--compose-recipient-row-transition);
            transition-delay: var(--compose-recipient-row-transition-delay);
            transition-property: color;
        }

        #recipient_box_clear_topic_button {
            transition: var(--compose-recipient-row-transition);
            transition-delay: var(--compose-recipient-row-transition-delay);
            transition-property: color, background-color, opacity;
        }

        #compose-direct-recipient .pill {
            transition: var(--compose-recipient-row-transition);
            transition-delay: var(--compose-recipient-row-transition-delay);
            transition-property: outline-color;
        }

        &#compose-recipient {
            .decorated-channel-name,
            .zulip-icon-chevron-down,
            .conversation-arrow,
            #stream_message_recipient_topic {
                transition: var(--compose-recipient-row-transition);
                transition-delay: var(--compose-recipient-row-transition-delay);
                transition-property: opacity;
            }
        }
    }
}

/* For the sake of keyboard use, we do not want to apply
   these styles when any element (the picker, user pills)
   has focus. */
.low-attention-recipient-row:not(:focus-within) {
    &#compose-recipient {
        .decorated-channel-name,
        .conversation-arrow,
        #stream_message_recipient_topic {
            opacity: 0.9;
        }

        .zulip-icon-chevron-down {
            opacity: 0;
        }
    }

    #compose_select_recipient_widget,
    #compose_recipient_box,
    #compose-direct-recipient .pill-container {
        background-color: transparent;
        border-color: transparent;

        /* Particularly in light mode, pill colors are almost identical
           to the compose-box background. We place a higher-contrast
           outline on them in the low-attention state. */
        .pill {
            outline: 1px solid var(--color-outline-low-attention-input-pill);
        }

        &:hover:not(.disabled) {
            background-color: var(
                --color-compose-recipient-box-background-color
            );
            border-color: var(--color-compose-recipient-box-border-color);
            opacity: 1;

            .decorated-channel-name,
            .zulip-icon-chevron-down,
            .conversation-arrow,
            #stream_message_recipient_topic {
                opacity: 1;
            }

            .pill {
                outline-color: transparent;
            }
        }

        #recipient_box_clear_topic_button:hover {
            opacity: 1;
        }
    }

    #compose_select_recipient_widget {
        .channel-privacy-type-icon.zulip-icon {
            color: var(--privacy-icon-color-modified);
        }

        &:hover .channel-privacy-type-icon.zulip-icon {
            color: var(--privacy-icon-color-original);
        }

        &.widget-open {
            background-color: var(--color-background-dropdown-widget-button);
            border-color: var(--color-compose-recipient-box-border-color);

            .channel-privacy-type-icon {
                color: var(--privacy-icon-color-original);
            }

            .decorated-channel-name,
            .zulip-icon-chevron-down {
                opacity: 1;
            }
        }
    }
}

.compose-send-or-save-button {
    border-radius: 4px;
    border: 0;
    margin-bottom: 0;
    color: var(--color-compose-send-button-icon-color);
    background-color: var(--color-compose-send-button-background);

    &:active {
        transition: transform 80ms;
        transform: scale(0.96);
    }

    &:focus {
        outline: 0;
    }

    &:focus-visible {
        border: 1px solid var(--color-compose-send-button-focus-border);
        box-shadow: 0 0 5px var(--color-compose-send-button-focus-shadow);
        /* Override default browser ring. */
        outline: 0;
    }

    &:hover {
        background-color: var(
            --color-compose-send-button-background-interactive
        );
    }
}

#compose-send-button {
    width: 74px;
    height: var(--compose-formatting-buttons-row-height);
    /* Allow to grow but not shrink */
    flex: 1 0 auto;
    /* Override inherited styles
       so that flexbox can do the
       job of positioning the icon. */
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Flex items respect z-index values;
       this is needed to keep the send
       button over top of the vdots
       background */
    z-index: 1;

    @media (width < $sm_min), ((width >= $sm_min) and (width < $mc_min)) {
        /* Drop to a square button,
           and don't flex any wider. */
        width: 30px;
        flex-grow: 0;
    }

    .zulip-icon-send {
        display: block;
        font-size: 1.2143em; /* 17px at 14px/em */
        line-height: 0.9412; /* 16px at 17px/em */
    }

    .loader {
        display: none;
    }
}

.enter_sends_choices {
    display: flex;
    flex-direction: column;
    color: var(--color-text-popover-menu);

    .enter_sends_choice {
        padding: 4px 10px;
        gap: 0 8px;
        display: grid;
        /* 1em and 1.5em were chosen from playing around with different values
           and picking some that looked reasonable. */
        grid-template:
            "radio-button instructions" 1.5em
            ".            instructions" auto / 1em auto;

        &:hover {
            background: var(--color-background-hover-popover-menu);
            outline: none;
        }

        &:active {
            background: var(--color-background-active-popover-menu);
        }

        &:focus-visible {
            background: var(--color-background-hover-popover-menu);
            border-radius: 4px;
            outline: 1px solid var(--color-outline-focus) !important;
            outline-offset: -1px;
        }

        & .enter_sends_choice_radio {
            width: auto;
            cursor: pointer;
            /* Radio buttons scale with height, and here we're just
               matching that to the active font-size. */
            height: 1em;
            accent-color: hsl(217deg 100% 60%);
            grid-area: radio-button;
            align-self: center;

            &:focus {
                outline: 1px dotted hsl(0deg 0% 20%);
                outline: 5px auto -webkit-focus-ring-color;
                outline-offset: -2px;
            }

            &:checked
                + .enter_sends_choice_text_container
                .popover-menu-hotkey-hint {
                color: hsl(217deg 100% 60%);
                border: 1px solid hsl(217deg 100% 60% / 50%);
            }
        }
    }

    .enter_sends_choice_text_container {
        display: flex;
        flex-direction: column;
        flex-shrink: 0;
        gap: 3px;
        white-space: nowrap;
        grid-area: instructions;
    }

    .enter_sends_choice_text {
        display: flex;
        align-items: center;
        gap: 3px;
    }

    .popover-menu-hotkey-hints {
        margin: 0;
        padding: 0;

        .popover-menu-hotkey-hint {
            padding: 2px 5px;
            display: flex;
        }
    }

    .enter_sends_major {
        /* 15px at 14px/1em */
        font-size: 1.0714em;
    }

    .enter_sends_minor {
        /* 12px at 14px/1em */
        font-size: 0.8571em;

        .popover-menu-hotkey-hint {
            /* 12px at 14px/1em */
            font-size: 0.8571em;
            padding: 1px 4px;
        }
    }
}

.drafts-item-in-popover {
    display: none;
    /* Only show the Drafts item in the popover when it's not visible
       in the compose box. */
    @media (width < $sm_min) {
        display: block;
    }

    .unread_count {
        margin: 1px 0 0 6px;
    }
}

#compose-recipient {
    /* Set a line-height equal to the font-size to
       make a compact, predictably tall recipient row. */
    line-height: 1;
    display: flex;
    flex: 1 1 0;
    /* Use this containing flex element to
      establish the minimum height of all its
      children; the default `align-items: stretch`
      (which is set on any flexbox without specifying
      it) ensures that the child flex items will
      always stretch to fit the height set here;
      larger heights, such as on group-DM pills,
      will allow this to grow as needed.
      Child flex items like chevrons take
      `align-self: center` to center only
      themselves, where necessary. */
    min-height: var(--compose-recipient-box-min-height);
    min-width: 0;
}

.compose-control-buttons-container {
    display: flex;
    align-items: center;
    /* 30px at 15px/1em */
    height: var(--compose-formatting-buttons-row-height);

    .compose_control_button {
        /* 22px at 15px/1em */
        font-size: 1.4667em;
        /* Constrain icon fonts to a perfect
           box (22px at 15px/1em) to sit centered
           in the 30px by 30px button area. */
        line-height: 1;
        /* Coordinate with the value of
           --compose-formatting-buttons-row-height */
        /* 30px at 22px/1em */
        height: 1.3636em;
        width: 1.3636em;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0.7;
        color: inherit;
        text-decoration: none;

        &:hover {
            opacity: 1;
            background-color: var(
                --color-compose-control-button-background-hover
            );
        }

        &:focus:not(:focus-visible) {
            outline: none;
        }

        &:focus-visible {
            outline-color: var(--color-compose-focus-ring);
        }
    }

    .compose_control_button_container.disabled-on-hover:hover {
        opacity: 0.3;

        .compose_control_button {
            pointer-events: none;
        }
    }

    .fa-eye {
        position: relative;
        top: -0.7px;
    }

    .divider {
        margin: 0 5px;
        /* Coordinate with the value of
           --compose-formatting-buttons-row-height */
        /* 16px at 14px/1em */
        height: 1.1429em;
        width: 1.5px;
        /* Prevent dividers from growing or shrinking. */
        flex: 0 0 auto;
        background-color: var(--color-compose-formatting-button-divider);

        @media (width < 400px) {
            /* Remove at mobile widths to make more space
               for compose buttons */
            display: none;
        }
    }
}

.message-send-controls {
    display: flex;

    @media (width < $sm_min) {
        /* At small widths, we display the
           diminutive Send button and vdots
           in a column, using `column-reverse`
           to put the vdots above Send. */
        flex-direction: column-reverse;
    }

    .compose-button-disabled {
        pointer-events: none;
    }
}

#compose-send-button.disabled-message-send-controls {
    cursor: default;
    opacity: 0.5;
}

.drag {
    display: none;
    height: 18px;
    width: 100%;
    top: 23px;
    position: relative;
    cursor: ns-resize;
}

.preview_message_area {
    padding: 5px 5px 0;
    overflow: auto;

    border-radius: 3px 3px 0 0;
}

.markdown_preview_spinner {
    margin: auto;
}

#compose_select_recipient_widget_wrapper {
    display: flex;
    /* Allow the contents wrapped here to
       expand the available space... */
    white-space: nowrap;
    /* And follow the fitted content on the
       flexbox. */
    flex: 0 0 fit-content;
    /* But force an ellipsis here, rather than
       just on an inner element. */
    overflow: hidden;
    text-overflow: ellipsis;
    /* Finally, hold this to a maximum width of
       40% of the recipient row. */
    max-width: 40%;

    &:focus-visible {
        outline: 0;

        #compose_select_recipient_widget {
            border-color: var(--color-compose-recipient-box-has-focus);
        }
    }

    .dropdown_widget_value {
        flex-grow: 1;
        display: grid;
        align-items: baseline;
        /* This is a bit of eyeball work, based on balancing
           out the size and spatial relationships between the
           privacy icon and the channel name, and the
           surrounding negative space. */
        /* 7px at 20px/1em; 4px at 20px/1em. */
        grid-template:
            "lefthand-offset privacy-icon privacy-icon-gap channel-name righthand-offset" auto / 0.35em [select-label-start] auto 0.2em minmax(
                0,
                1fr
            )
            [select-label-end]
            0.35em;

        .channel-privacy-type-icon {
            grid-area: privacy-icon;
            place-self: center;
            font-size: 0.95em; /* 19px at 20px/1em */
            margin-top: -0.0579em; /* Eyeball work; 1.1px at 19px/1em */
            color: var(--privacy-icon-color-original);
            /* Eliminate inherited component styles. */
            position: static;
            padding: 0;
            width: 1em;
            height: 1em;

            &.zulip-icon-lock {
                /* The lock looks better centered without
                   a negative margin-top adjustment. */
                margin-top: 0;
            }
        }

        .select-channel-label,
        .decorated-dm-label,
        .decorated-channel-name {
            grid-area: channel-name;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            color: var(--color-text-default);
        }

        .select-channel-label {
            grid-area: select-label;
        }
    }

    /* We suppress the chevron on the channel picker. */
    .zulip-icon-chevron-down {
        display: none;
    }
}

/* Class for send-area buttons, such as
   Drafts and the send-adjacent vdots */
.send-control-button {
    border: 0;
    outline: 0;
    padding: 0;
    margin: 0;
    border-radius: 4px;
    color: var(--color-compose-send-control-button);
    background-color: var(--color-compose-send-control-button-background);
    font-weight: 450;

    &:active {
        transition: transform 80ms;
        transform: scale(0.96);
    }

    &:focus:not(:focus-visible) {
        outline: none;
    }

    &:focus-visible {
        outline-color: var(--color-compose-focus-ring);
    }

    &:hover {
        /* We need to use !important here, regrettably, to keep the default
           dark-mode hover colors from showing. */
        color: var(--color-compose-send-control-button-interactive) !important;
        background-color: var(
            --color-compose-send-control-button-background-interactive
        );
        text-decoration: none;
    }
}

/* vdots icon located next to `Send` button which shows
   options to schedule the message. */
#send_later {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    /* Allow to grow but not shrink */
    flex: 1 0 auto;
    height: var(--compose-formatting-buttons-row-height);
    /* Make the vdots appear to extend from
       beneath the send button when an
       interactive background is present.
       Compensatory padding for this negative
       margin is handled on the vdots icon
       below, so as to make for a maximum
       clickable vdots area. */
    margin-left: -4px;
    border-radius: 0 4px 4px 0;
    /* Flex items respect z-index values;
       this is needed to keep the vdots
       background beneath the send button. */
    z-index: 0;

    &:focus-visible {
        /* Use a border, not an outline, to preserve the
           conjoined layout with the Send button. Flexbox
           will handle the dimension change, so there won't
           be any movement of the vdots in this state. */
        outline: 0;
        border: 2px solid var(--color-compose-focus-ring);
    }

    @media ((width >= $sm_min) and (width < $mc_min)) {
        width: 32px;
    }

    @media (width < $sm_min) {
        /* Drop to a square, rounded button. */
        width: 30px;
        /* This reduces the vdots button so that
           it and the send button fit within the
           53px height the compose textarea occupies,
           including its top border. */
        height: 25px;
        margin-left: 0;
        border-radius: 4px;
    }

    .zulip-icon {
        padding: 5px 0 5px 4px;
        /* 17px at 14px/1em */
        font-size: 1.2143em;
        flex-grow: 1;

        @media (width < $sm_min) {
            /* Keep vdots centered above the
               Send button at smallest sizes. */
            padding-left: 0;
        }
    }
}

#compose-drafts-button {
    /* Use border-box sizing to make
       width calculations more predictable
       in a flex context. */
    box-sizing: border-box;
    /* In a columnar flex, we need to
       use alignment to keep the Drafts
       button from expanding the full
       width of the column. */
    align-self: flex-start;
    /* Keep the Drafts button text
       aligned with the Send button's
       lefthand edge */
    padding: 0 8px;
    margin-left: -8px;
    /* Allow the button to occupy as much
       as 100% of the container width, plus
       the 8px from the negative left margin. */
    max-width: calc(100% + 8px);
    display: flex;
    gap: 2px;

    .compose-drafts-text {
        /* Set an ellipsis when the translated
           version of `Drafts` exceeds the width,
           and keep button text to a single line. */
        white-space: nowrap;
        overflow-x: hidden;
        text-overflow: ellipsis;
        flex-grow: 1;
    }

    @media (width < $mc_min) {
        /* Reduce the padding on the sides so the
        button's edge isn't too close to the textarea */
        margin-left: -3px;
        max-width: calc(100% + 3px);
        /* Align the `Drafts` text with the
           send icon below. */
        padding: 0 3px;
    }
}

.saved_snippets-dropdown-list-container {
    width: 17.8571em; /* 250px at 14px/em */

    .dropdown-list .dropdown-list-item-common-styles {
        padding: 0.3571em 0.7143em; /* 5px 10px at 14px/em */
        /* Make content appear more distinct from
           the snippet name. */
        border-bottom: solid 1px var(--color-border-popover-menu-separator);

        .dropdown-list-item-name {
            line-height: 1.2em;
        }

        .dropdown-list-item-description {
            font-weight: 400;
            font-size: 0.9283em; /* 13px at 14px/em */
            opacity: 0.8;
            padding: 0;
            text-overflow: ellipsis;
            overflow: hidden;
        }

        .dropdown-list-text-selected {
            font-weight: 500;
            max-width: 210px;
            display: inline-block;
            text-overflow: ellipsis;
            overflow: hidden;
            white-space: nowrap;
        }
    }
}

#add-new-saved-snippet-modal,
#edit-saved-snippet-modal {
    & .saved-snippet-title {
        width: 97%;
        margin-bottom: 20px;
    }

    & .saved-snippet-content {
        width: 97%;
        resize: vertical;
    }
}

#compose.compose-fullscreen,
#compose.compose-intermediate {
    z-index: 99;

    #compose-container {
        height: 100%;
    }

    .message_comp {
        flex: 1;
        display: flex !important;
        flex-flow: column;
    }

    #compose-textarea,
    #preview_message_area {
        /* When in full screen, override max-height
           properties set from manually resizing. */
        max-height: none !important;
    }

    #compose-textarea {
        /* Additionally, override the height properties
           on the textarea. This is essential if the
           textarea has been manually resized prior
           to going into fullscreen. */
        height: auto !important;
    }

    #preview_message_area {
        /* Setting height to 0 is necessary to make the flex+Simplebar
           combination work correctly, without pushing the compose
           controls offscreen when previewing a very tall message. */
        height: 0;
        flex: 1;
    }
}

#compose.compose-fullscreen {
    .maximize-composebox-button,
    .expand-composebox-button {
        display: none;
    }

    .collapse-composebox-button {
        display: flex;
    }
}

#compose.compose-intermediate,
#compose.automatically-expanded {
    .collapse-composebox-button,
    .expand-composebox-button {
        display: none;
    }

    .maximize-composebox-button {
        display: flex;
    }
}

#compose.compose-intermediate {
    height: var(--max-unmaximized-compose-height);
}

.preview_mode {
    #preview-message-area-container {
        /* When in preview mode, we display the
           preview container as a columnar flexbox.
           This containing element is necessary
           because Simplebar on its own will cause
           a grid blowout despite a minmax(0, 1fr)
           row definition. */
        display: flex;
        flex-flow: column;
    }

    .preview_mode_disabled {
        opacity: 0.3;

        .compose_control_button {
            pointer-events: none;
        }
    }

    .message-edit-textbox {
        /* In preview mode, we hide the message edit
           textbox to prevent it from appearing behind
           the preview container. We cannot set its
           display to none or visibility to hidden, as
           that would prevent us from modifying the
           textarea's value. */
        height: 0;
        overflow: hidden;
    }
}