html {
    overflow: hidden scroll;
    overscroll-behavior-y: none;
    width: calc(100% - var(--disabled-scrollbar-width));
}

body,
html {
    height: 100%;
    touch-action: manipulation;
}

.column-middle,
#main_div {
    background-color: var(--color-background);
}

#app-loading.loaded {
    display: none !important; /* We are now loaded, by definition. */
}

body {
    width: 100%;
    margin: 0;
    padding: 0;
    font-size: var(--base-font-size-px);
    /* The line-height used in most of the UI should be at least
       its legacy value, but should expand with larger base
       line-height values. */
    line-height: max(
        var(--legacy-body-line-height-unitless),
        var(--base-line-height-unitless)
    );
    font-family: "Source Sans 3 VF", sans-serif;
    color: var(--color-text-default);
    background-color: var(--color-background);

    /* Implementation for fluid layout width setting. */
    .header-main,
    .app .app-main,
    #compose-container {
        /* 1417px at 14px/1em; (14px * 20.5em) - 12px + 880 + 250px = 1417px */
        max-width: 100.3571em;
        max-width: calc(var(--left-sidebar-max-width) + 62.8571em + 250px);
    }

    &.fluid_layout_width {
        .header-main,
        .app .app-main,
        #compose-container {
            max-width: inherit;
        }
    }
}

input,
button,
select,
textarea {
    font-family: "Source Sans 3 VF", sans-serif;
    /* Disable bootstrap size CSS; we want to use our default font size on
       body for input elements. */
    line-height: normal;
    font-size: inherit;
}

blockquote p {
    font-weight: normal;
}

a {
    cursor: pointer;

    &.message_label_clickable:hover {
        cursor: pointer;
        color: hsl(200deg 100% 40%);
    }
}

code,
pre {
    font-family: "Source Code Pro", monospace;
}

.no-select {
    user-select: none;
}

.text-select {
    user-select: text;
}

p.n-margin {
    margin: 10px 0 0;
}

.small-line-height {
    line-height: 1.1;
}

.float-left {
    float: left;
}

.float-right {
    float: right;
}

.float-clear {
    clear: both;
}

.no-margin {
    margin: 0;
}

.history-limited-box {
    color: hsl(16deg 60% 45%);
    border: 1px solid hsl(16deg 60% 45%);
    box-shadow: 0 0 2px hsl(16deg 60% 45%);
}

.all-messages-search-caution {
    border: 1px solid hsl(192deg 19% 75% / 20%);
    box-shadow: 0 0 2px hsl(192deg 19% 75% / 20%);
}

.history-limited-box,
.all-messages-search-caution {
    border-radius: 4px;
    display: none;
    font-size: 16px;
    margin: 0 auto 12px;
    padding: 5px;
    /* Difference should be 16px to accommodate the icon. */
    /* This emulates hanging indent. */
    padding-left: 26px;
    text-indent: -10px;

    .all-messages-search-caution-icon {
        margin: 0 3px 0 1px;
    }

    & p {
        margin: 0;
        padding: 4px;
    }
}

.bottom-messages-logo {
    display: none;
}

.alert-zulip-logo,
.top-messages-logo,
.bottom-messages-logo {
    width: 24px;
    height: 24px;
    margin: 0 auto 12px;

    & svg {
        & circle {
            fill: var(--color-zulip-logo);
            stroke: var(--color-zulip-logo);
        }

        & path {
            fill: var(--color-zulip-logo-z);
            stroke: var(--color-zulip-logo-z);
        }
    }

    &.loading circle {
        fill: var(--color-zulip-logo-loading);
        stroke: var(--color-zulip-logo-loading);
    }
}

.top-messages-logo {
    /* Since padding under message header is not transparent
       we need to position it below the padding. */
    padding-top: var(--header-padding-bottom);
    margin-bottom: 0;
    /* To fit the logo inside the spinner. */
    position: relative;
    top: -2px;
}

/* See https://web.dev/animations-guide/#triggers before adding any funny animation properties here. */
@keyframes feedback-slide-in {
    from {
        transform: translateY(-120%);
        opacity: 0;
    }

    to {
        transform: translateY(50px);
        opacity: 1;
    }
}

@keyframes feedback-slide-out {
    from {
        transform: translateY(50px);
        opacity: 1;
    }

    to {
        transform: translateY(-120%);
        opacity: 0;
    }
}

#feedback_container {
    display: none;
    position: fixed;
    width: 400px;
    top: 0;
    left: calc(50vw - 220px);
    padding: 15px;
    background-color: hsl(0deg 0% 98%);
    border-radius: 5px;
    box-shadow: 0 0 30px hsl(0deg 0% 0% / 25%);
    z-index: 110;

    &.show-feedback-container {
        display: block;
        animation: feedback-slide-in 0.6s forwards;
    }

    &.slide-out-feedback-container {
        animation: feedback-slide-out 0.6s;
    }

    & h3 {
        font-size: 16pt;
        margin-top: 2px;
    }

    .exit-me {
        font-size: 20pt;
        font-weight: 200;
        margin: 0 0 0 10px;
        cursor: pointer;
    }
}

#navbar-fixed-container {
    position: fixed;
    top: 0;
    z-index: 102;
}

/* Adjust width of any fixed / absolute positioned elements that might be visible in
   the background when a overlay / modal is open. */
#navbar-fixed-container,
#compose {
    width: calc(100% - var(--disabled-scrollbar-width));
}

.header {
    width: 100%;
    height: var(--header-height);
    /* Since the headers are sticky, we need non-transparent background. */
    background-color: var(--color-background);
    /* Add 1px box-shadow below header so that if there is a gap between sticky header
       and header at some zoom level, it is covered by this */
    box-shadow: 0 1px 0 0 var(--color-background);
}

#navbar-middle .column-middle-inner,
.header,
#message_view_header {
    background-color: var(--color-background-navbar);
    box-shadow: inset 0 -1px 0 var(--color-navbar-bottom-border);
}

#navbar_alerts_wrapper {
    font-size: 1rem;
    position: relative;

    .alert {
        /* Since alerts are only rendered into the DOM when they are first
           displayed, display: block is the right default for this setting. */
        display: block;
        margin: 0;
        padding-top: 12px;
        padding-bottom: 12px;

        border: none;
        border-radius: 0;

        text-align: center;
        text-shadow: none;
        color: hsl(0deg 0% 100%);

        &.alert-info {
            background-color: hsl(170deg 46% 54%);

            &.red {
                background-color: hsl(0deg 46% 54%);
            }
        }

        .close {
            line-height: 24px;
            position: absolute;
            right: 18px;
            top: 50%;
            transform: translateY(-50%);
        }

        .alert-link {
            color: hsl(169deg 100% 88%);
            font-weight: 600;
        }

        &.red .alert-link {
            color: hsl(0deg 100% 88%);
        }

        .buttons .alert-link {
            margin: 0 5px;
        }
    }
}

.app {
    min-width: 100%;
    min-height: 100%;
    z-index: 99;
}

.app-main,
.header-main {
    width: 100%;
    margin: 0 auto;
    padding: 0;
    position: relative;
}

body.has-overlay-scrollbar {
    /* Move simplebar scrollbar to the left so that
       browser scrollbar doesn't overlap with it. */
    .app-main .column-right .simplebar-track.simplebar-vertical {
        right: var(--browser-overlay-scrollbar-width);
    }
}

/* Styles for popovers rendered as an overlay at the
   center of the screen, primarily used in mobile sizes. */
#popover-overlay-background {
    position: fixed;
    inset: 0;

    /* Needs to be higher than the 105 for div.overlay so that the
       emoji picker can render on top of the user status picker. */
    z-index: 106;
    background-color: hsl(0deg 0% 0% / 70%);
}

.white-space-preserve-wrap {
    white-space: pre-wrap;
}

.white-space-preserve {
    white-space: pre;
}

/* Set flex display on login buttons only in the
   spectator view. We want them to display none
   otherwise. */
.spectator-view #top_navbar .column-right .spectator_login_buttons {
    display: flex;
}

/* This applies to column-left both in navbar and app. */
.column-right {
    width: var(--right-sidebar-width);
    max-width: var(--right-sidebar-width);
    position: absolute;
    right: 0;
    top: 0;

    .spectator_login_buttons {
        /* Allow the login buttons flexbox to
           grow and shrink to fit the available
           area. */
        flex: 1 1 0;
        /* Use a flexbox gap of 7px between the
           buttons to reflect the outer 7px of space. */
        gap: 7px;
        /* Don't allow login buttons flexbox to
           break out of the allotted right-column
           space. */
        overflow: hidden;
        /* This should be removed once the navbar
           has been rewritten entirely with modern
           layout methods. For now, we pull this up
           so that the buttons and search box are
           the same height and their boxes sit on the
           same invisible line. */
        margin-top: -1px;

        & a {
            font-size: calc(16em / 14);
            /* Vertically size the buttons to
               match the search box. */
            line-height: 28px;
            font-weight: 450;
            letter-spacing: 0.03ch;
            /* Allow individual buttons to grow
               and shrink inside their containers,
               with padding to prevent text from
               sitting against the edge of the button. */
            flex: 1 1 0;
            padding: 0 4px;
            /* Center the text nodes within the
               flex items. */
            text-align: center;
            /* Internationalization: disallow wrapping,
               and display an ellipsis when there's not
               space enough to accommodate the button
               text. */
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            /* Button curvature and transitions. */
            border-radius: 4px;
            transition: all 100ms ease-out;

            &:hover,
            &:focus {
                text-decoration: none;
            }

            &:active {
                transform: scale(0.98);
            }

            & i {
                margin-right: 3px;
            }
        }

        & .login_button {
            color: var(
                --color-navbar-spectator-medium-attention-brand-button-text
            );
            background-color: var(
                --color-navbar-spectator-medium-attention-brand-button-background
            );

            &:hover {
                color: var(
                    --color-navbar-spectator-medium-attention-brand-button-text
                );
                background-color: var(
                    --color-navbar-spectator-medium-attention-brand-button-background-hover
                );
            }

            &:active {
                color: var(
                    --color-navbar-spectator-medium-attention-brand-button-text
                );
                background-color: var(
                    --color-navbar-spectator-medium-attention-brand-button-background-active
                );
            }
        }

        .divider {
            color: hsl(0deg 0% 88%);
            font-size: 20px;
            line-height: 1;
        }
    }

    .spectator_narrow_login_button {
        position: absolute;
        top: 0;
        right: 0;
        height: var(--header-height);
        width: var(--header-height);

        @media (width >= $xl_min) and (height >= 600px) {
            display: none;
        }

        .login_button {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100%;

            &:hover {
                text-decoration: none;
            }

            & i {
                color: var(--color-navbar-icon);
                font-size: 1.6em;
            }
        }
    }
}

/* This applies to column-left both in navbar and app. */
.column-left {
    width: var(--left-sidebar-width);
    max-width: var(--left-sidebar-width);
    position: absolute;
    left: 0;
    top: 0;
}

#message_feed_container,
.app-main .column-left .left-sidebar,
.app-main .column-right .right-sidebar {
    padding-top: calc(
        var(--navbar-fixed-height) + var(--header-padding-bottom)
    );
}

.app-main {
    height: 100%;
    min-height: 100%;

    .column-left .left-sidebar,
    .column-right .right-sidebar {
        position: fixed;
        z-index: 100;
    }

    .column-left .left-sidebar {
        width: var(--left-sidebar-width);
        padding-left: var(--left-sidebar-padding-left);
    }

    .column-right .right-sidebar {
        padding-left: 10px;
        width: 240px;
    }

    .column-middle {
        min-height: 100%;
        /* We need `overflow-y: visible` for sticky headers to work. */
    }
}

.column-middle,
#compose-content {
    margin-right: var(--right-sidebar-width);
    margin-left: calc(
        var(--left-sidebar-width) + var(--left-sidebar-padding-left)
    );
    position: relative;
}

textarea,
input {
    font-family: "Source Sans 3 VF", sans-serif;
}

/* Override Bootstrap's fixed sizes for various elements */
textarea,
label {
    font-size: inherit;
    line-height: inherit;
}

/* Bootstrap's focus outline uses -webkit-focus-ring-color which doesn't exist in Firefox */
a:not(:active):focus,
button:focus,
label.checkbox input[type="checkbox"]:focus ~ .rendered-checkbox,
i.fa:focus,
i.zulip-icon:focus-visible,
[role="button"]:focus {
    outline: 2px solid var(--color-outline-focus);
    /* TODO: change solid to auto once the Chromium bug #1105822 is fixed */
}

/* List of text-like input types taken from Bootstrap */
input {
    &[type="text"],
    &[type="password"],
    &[type="datetime"],
    &[type="datetime-local"],
    &[type="date"],
    &[type="month"],
    &[type="time"],
    &[type="week"],
    &[type="number"],
    &[type="email"],
    &[type="url"],
    &[type="search"],
    &[type="tel"],
    &[type="color"] {
        font-size: inherit;
        height: 1.4em;
    }
}

li,
.table th,
.table td {
    line-height: inherit;
}

.btn {
    font-size: inherit;
    height: auto;
    line-height: 100%;
}

/* Classes which style copy buttons */
.copy_button_base {
    outline-color: hsl(0deg 0% 73%);
    height: 18px;
    width: 10px;
    padding: 6px;
    display: block;
    /* The below two avoids the padded element from displaying
    its own border and background color */
    border: none;
    background-clip: content-box;

    &:hover svg path {
        fill: var(--color-fill-hover-copy-icon);
    }
}

.copy_message {
    float: right;
    position: relative;
    cursor: pointer;
    top: 30px;
    /* To make sure the svg doesn't occupy any vertical space. */
    margin-top: -30px;
    right: 2px;
    padding-top: 2px;

    #clipboard_image {
        margin: 0;
    }
}

#copy_generated_link_container {
    display: flex;
    width: 100%;
    margin-right: -32px;
    gap: 4px;
    align-items: center;
}

#copy_generated_invite_link {
    position: relative;
    margin-right: -32px;
    margin-top: -1px;
    padding: 6px 3px 6px 13px;
    float: right;

    /* This property nullifies the box-shadow rendered by .btn class */
    &:active {
        box-shadow: none;
    }

    & path {
        fill: var(--color-fill-user-invite-copy-icon);
    }

    &:hover svg path {
        fill: var(--color-fill-hover-copy-icon);
    }
}

#clipboard_image {
    margin-top: -5px;
    margin-left: -8px;
}

/* Classes for hiding and showing controls */

.notdisplayed {
    display: none !important;
}

.notvisible {
    visibility: hidden !important;
    width: 0 !important;
    min-width: 0 !important;
    min-height: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
    position: absolute !important;
}

/* Lighter strong */

strong {
    font-weight: 600;
}

.preserve_spaces {
    white-space: pre-wrap;
}

.sp-input {
    width: calc(100% - 14px);
    box-sizing: initial !important;
}

.logout {
    white-space: nowrap;
}

.tooltip {
    &.in {
        font-size: 12px;
        line-height: 1.3;

        opacity: 1;

        &.left {
            margin-left: -12px;
            margin-top: 3px;
        }
    }

    .tooltip-inner {
        background-color: hsl(0deg 0% 7% / 80%);
        padding: 3px 5px;
    }

    /*
    Since hover and click are activated together on touchscreen
    devices, the hover state persists until the next click, creating
    awkward UI where the tooltip sticks around forever :(.

    To resolve this, we just hide the tooltip for touch-events on
    touch-enabled devices resolving the above problem.  This means
    that tooltips will never appear on touchscreen devices, but that's
    probably a reasonable tradeoff here.

    Source: https://drafts.csswg.org/mediaqueries-4/#mf-interaction
    */

    @media (hover: none) {
        visibility: hidden !important;
    }
}

.buddy_list_tooltip_content {
    text-align: left;
    word-wrap: break-word;
    /* 280px at 14px/1em */
    max-width: 20em;
}

#change_visibility_policy_button_tooltip {
    text-align: left;

    .tooltip-privacy-icon {
        position: relative;
        display: inline-block;
    }

    .tooltip-privacy-icon .zulip-icon-lock {
        margin-top: -0.15em !important;
    }

    .tooltip-privacy-icon i {
        position: absolute;
        top: 0.1667em;
    }

    .privacy-tooltip-stream-name {
        margin-left: 1.25em;
    }
}

.narrow-filter {
    display: block;
    position: relative;
}

.new_messages {
    background-color: hsl(194deg 53% 79%);
}

.new_messages,
.new_messages_fadeout {
    transition: all 3s ease-in-out;
}

.messagebox-content .slow-send-spinner {
    display: block;
    font-size: 12px;
    text-align: right;
    opacity: 0.8;
    color: var(--color-text-default);
    animation: rotate 1s infinite linear;
}

.star {
    &:hover {
        cursor: pointer;
    }
}

.copy-paste-text {
    /* Hide the text that we want copy paste to capture */
    position: absolute;
    text-indent: -99999px;
    float: left;
    width: 0;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(359deg);
    }
}

@keyframes fadeInMessage {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@keyframes fadeInEditNotice {
    0% {
        transform: translateX(-10px);
    }

    100% {
        transform: translateX(0);
    }
}

.selected_message {
    .messagebox-content {
        /* We add an outline and shift it inside the message so that without
           any vertical padding changes, we can have the outline surrounding
           the message without overflowing the boundary of the message in any case. */
        outline: 1px solid var(--color-selected-message-outline);
        border-radius: 5px;
        outline-offset: -1px;
    }
}

.selected_msg_for_touchscreen {
    @media (hover: none) {
        .message_reactions .reaction_button {
            visibility: visible;
            pointer-events: all;
        }
    }
}

/* Make the action icon on the message row
   always visible while the popover is open */
.has_actions_popover .actions_hover {
    visibility: visible !important;
    pointer-events: all !important;
    opacity: 1 !important;

    & i:focus {
        /* Avoid displaying a focus outline outside the popover on the \vdots
           icon when opened via the mouse. */
        outline: 0 !important;
    }
}

.has_actions_popover .info {
    opacity: 1;
    visibility: visible;
}

.small {
    font-size: 80%;
}

.tiny {
    font-size: 60%;
}

div.message-list {
    border-collapse: separate;
    margin-left: auto;
    display: none;
    width: 100%;
}

div.focused-message-list {
    display: block;
}

.rtl {
    direction: rtl;
}

.topic_edit {
    display: none;
    line-height: 22px;

    .alert {
        display: inline-block;
        margin: 0;
        padding: 0 10px;
        line-height: 17px;
    }
}

.inline_topic_edit {
    margin-bottom: 5px;
    width: 206px;

    &.header-v {
        height: 18px;
        display: inline-block;
        padding: 0 3px;
        vertical-align: baseline;
        line-height: 0px;
        box-shadow: none;
        color: hsl(0deg 0% 33%);
        border-radius: 4px;
        border: 1px solid hsl(0deg 0% 80%);
        transition:
            border linear 0.2s,
            box-shadow linear 0.2s;

        &:focus {
            border-color: hsl(206deg 80% 62% / 80%);
            outline: 0;
            box-shadow:
                inset 0 1px 1px hsl(0deg 0% 0% / 7.5%),
                0 0 8px hsl(206deg 80% 62% / 60%);
        }
    }
}

.inline_topic_edit:focus {
    outline: none;
}

#move_topic_modal select {
    width: auto;
    margin-bottom: 10px;
    max-width: 100%;
}

.topic_move_breadcrumb_messages {
    margin: 0 5px 5px 0;
    align-self: center;
    width: 100%;
    white-space: nowrap;

    & label.checkbox {
        /* Place the checkboxes on their own lines. */
        display: block;

        & input {
            margin: 0;
            vertical-align: baseline;
        }

        & + label.checkbox {
            margin-top: 10px;
        }
    }

    & label {
        display: inline-block;
        margin-right: 10px;
    }
}

.message_length_controller {
    .message_length_toggle {
        width: 100%;
        height: 24px;
        margin-bottom: var(--message-box-markdown-aligned-vertical-space);
        color: var(--color-text-show-more-less-button);
        background-color: var(--color-show-more-less-button-background);
        border-radius: 4px;
        border: none;
        outline: none;
        font-variant: all-small-caps;

        &:hover {
            background-color: var(
                --color-show-more-less-button-background-hover
            );
        }

        &:active {
            background-color: var(
                --color-show-more-less-button-background-active
            );
            scale: 0.98;
        }
    }
}

.bookend {
    margin-top: 10px;
    background-color: transparent;
}

.inline_profile_picture {
    display: inline-block;
    width: var(--message-box-avatar-width);
    height: var(--message-box-avatar-height);
    /* Don't inherit the line-height from message-avatar;
       this preserves the dimensions and rounded corners
       on the image itself. */
    line-height: 1;
    margin-right: 11px;
    vertical-align: top;
    border-radius: 4px;
    overflow: hidden;

    &.guest-avatar::after {
        outline: 2px solid hsl(0deg 0% 100%);
    }
}

.home-error-bar {
    margin-top: 5px;
    display: none;

    .alert {
        margin-bottom: auto;
    }
}

.streamname {
    font-weight: bold;
}

.top-navbar-container {
    /* Calculate right margin so that title and description
       elements can truncate and not collide with or run underneath
       with the search section. */
    margin-right: calc(
        var(--search-box-width) + var(--navbar-content-righthand-offset)
    );
    overflow: hidden;
    text-overflow: ellipsis;
}

#streamlist-toggle {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    text-align: center;
}

.hide-streamlist-toggle-visibility,
.hide-navbar-buttons-visibility {
    visibility: hidden;
}

#header-container .left-sidebar-toggle-button {
    text-decoration: none;
    color: var(--color-navbar-icon);
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--header-height);
    height: var(--header-height);

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

        .left-sidebar-toggle-unreadcount {
            border-color: var(--color-header-button-hover-no-alpha);
        }
    }

    &:active {
        background-color: var(--color-header-button-focus);
    }

    &:focus {
        outline: 0;
    }

    &:focus-visible {
        outline: none;
        background-color: var(--color-header-button-focus);
    }

    &:active,
    &:focus-visible {
        .left-sidebar-toggle-unreadcount {
            border-color: var(--color-header-button-focus-no-alpha);
        }
    }
}

.left-sidebar-toggle-unreadcount {
    position: absolute;
    display: none;
    height: 6px;
    width: 6px;
    background-color: var(--color-navbar-icon);
    top: 10px;
    right: 9px;
    border: 2px solid var(--color-background-navbar);
    border-radius: 6px;
    padding: 0;
    font-size: 0;
}

nav {
    .column-left {
        text-align: left;
        display: flex;
        justify-content: left;
        gap: 4px;

        .brand {
            display: flex;
            align-items: center;
        }

        .nav-logo {
            display: inline-block;
            height: 20px;
            max-width: 200px;

            @media (height < $short_navbar_cutoff_height) {
                height: 15px;
            }
        }

        .left-sidebar-toggle-button .left-sidebar-toggle-unreadcount {
            top: 10px;
            left: 21px;
        }
    }

    & a {
        &.no-style:hover {
            text-decoration: none;
            cursor: pointer;
        }

        .no-style {
            text-decoration: none;
        }
    }
}

#bottom_whitespace {
    display: block;
    height: var(--max-unmaximized-compose-height);
}

.operator_value {
    font-family: "Source Code Pro", monospace;
    color: hsl(353deg 70% 65%);
}

.operator {
    font-family: "Source Code Pro", monospace;
}

#loading_older_messages_indicator,
#loading_newer_messages_indicator {
    margin: 10px;
}

#loading_older_messages_indicator_box_container,
#loading_newer_messages_indicator_box_container {
    position: absolute;
    left: 50%;
}

#loading_older_messages_indicator_box,
#loading_newer_messages_indicator_box {
    position: relative;
    left: -50%;
    top: -43px;
    z-index: 1;
    border-radius: 6px;
}

#page_loading_indicator {
    margin: 10px auto;
}

#page_loading_indicator_box_container {
    position: absolute;
    left: 50%;
}

#page_loading_indicator_box {
    position: relative;
    left: -50%;
    top: -43px;
    z-index: 1;
    border-radius: 6px;
}

#create_stream_subscribers {
    margin-top: 10px;

    .checkbox {
        display: block;

        & input[type="checkbox"] {
            margin: 5px 0;
            float: none;
        }
    }
}

.sub_button_row {
    text-align: center;
}

.small_square_button {
    padding: 0;
    border: none;
    font-size: 12px;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    margin-bottom: 3px;

    &:focus {
        outline: none;
    }

    &.small_square_x {
        background-color: hsl(0deg 0% 100%);
        color: hsl(0deg 0% 47%);

        &:hover {
            color: hsl(0deg 0% 18%);
        }
    }
}

div.topic_edit_spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    margin-top: -1px;
    padding: 2px;
    vertical-align: middle;
}

div.toggle_resolve_topic_spinner {
    margin-top: -12px;
    padding-left: 9px;
}

div.topic_edit_spinner .loading_indicator_spinner,
div.toggle_resolve_topic_spinner .loading_indicator_spinner {
    width: 14px;
    height: 14px;

    & path {
        fill: var(--color-recipient-bar-controls-spinner);
    }
}

#custom-expiration-time-input,
#invite-user-form {
    margin: 0;
}

.invite-user-select {
    vertical-align: middle;
}

#multiuse_invite_link {
    width: 370px;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-block;
    overflow: hidden;
    vertical-align: bottom;
}

.add_streams_container {
    display: inline-flex;
    align-items: center;
    width: 100%;
}

#custom-expiration-time-input {
    width: 5ch;
    margin-right: 15px;

    padding: 4px 6px;
    color: hsl(0deg 0% 33%);
    border-radius: 4px;
    border: 1px solid hsl(0deg 0% 80%);
    box-shadow: inset 0 1px 1px hsl(0deg 0% 0% / 7.5%);
    transition:
        border linear 0.2s,
        box-shadow linear 0.2s;

    &:focus {
        border-color: hsl(206deg 80% 62% / 80%);
        outline: 0;
        box-shadow:
            inset 0 1px 1px hsl(0deg 0% 0% / 7.5%),
            0 0 8px hsl(206deg 80% 62% / 60%);
    }
}

#custom-expiration-time-unit {
    width: auto;
}

.empty_feed_notice {
    max-width: 600px;
    margin: 0 auto;
    padding: 3em 1em;
    text-align: center;
}

.empty-feed-notice-title {
    font-size: 1.5em;
    font-weight: 400;
    word-wrap: break-word;
}

.empty-feed-notice-description {
    font-size: 1.1em;
}

.message-fade,
.user_sidebar_entry.user-fade {
    opacity: 0.4;
}

.emoji {
    height: 25px;
    width: 25px;
    /* Maintain `vertical-align` for inline-block styles in messages: */
    vertical-align: middle;
    /* But, for all others, use flexbox and its align-self property.
      What is excellent about this is that flexbox will ignore the
      `vertical-align` value, while inline-block contexts will ignore
      the `align-self` property: */
    align-self: center;
}

.status-emoji {
    /* 16px at 14px/1em */
    height: 1.1429em;
    width: 1.1429em;
    /* We are setting minimum width here because when the user's name is very long,
    emoji's width decreases and causes it to break. */
    min-width: 1.1429em;
    /* In most contexts, status emoji appear immediately after a name
      field with no margin. Position the status emoji with 3px of left
      margin to space it from the name, and set no right margin so
      that any components to the right appear equally distant as they
      would be from a name. */
    margin-left: 3px;
    margin-right: 0;
}

/* FIXME: Combine this rule with the one in portico.css somehow? */
#pw_strength {
    width: 100%;
    height: 10px;
    margin-bottom: 0;
}

.sub-unsub-message {
    padding-bottom: 10px;
    text-align: center;
}

.sub-unsub-message span {
    font-size: 1em;
    display: block;
    padding: 4px;
    overflow: hidden;
}

.sub-unsub-message .stream-status {
    opacity: 0.6;

    & i {
        font-size: 10px;
        position: relative;
        top: 1px;
        margin-left: 2px;
    }

    .zulip-icon.zulip-icon-lock {
        font-size: 12px;
    }
}

.sub-unsub-message span::before,
.sub-unsub-message span::after,
.date_row span::before,
.date_row span::after {
    display: inline-block;
    position: relative;
    content: " ";
    vertical-align: middle;
    height: 0;
    opacity: 0.15;
    border-bottom: 1px solid hsl(0deg 0% 0%);
}

.sub-unsub-message span::before,
.sub-unsub-message span::after {
    width: 50%;
}

.date_row span::before {
    width: 100%;
}

.date_row span::after {
    width: 6px;
    left: 0.25em;
    /* Align date with message time and recipient bar date. */
    margin-right: -1px;
}

.sub-unsub-message span::before,
.date_row span::before {
    right: 0.25em;
    margin-left: -50%;
}

.sub-unsub-message span::after {
    left: 0.25em;
    margin-right: -50%;
}

#topic_edit_form {
    display: inline-block;
    margin: 0;
    height: 22px;
    padding-left: 20px;
    padding-right: 3px;
    line-height: 22px;
    margin-left: -15px;
}

.screen {
    position: absolute;
    left: 0;
    top: 0;
    background-color: hsl(0deg 0% 0%);
    z-index: 20000;
}

.deactivated_user .deactivated-user-icon {
    color: inherit;
    margin-left: 2px;
    font-size: 0.9em;
}

.no-drag {
    -webkit-user-drag: none;
    user-select: none;
}

.flatpickr-calendar {
    /* Hide the up and down arrows in the Flatpickr datepicker year */
    .flatpickr-months .numInputWrapper span {
        display: none;
    }

    .flatpickr-time-separator {
        position: relative;
        left: 5px;
    }

    .flatpickr-time input {
        margin: 0 5px;
        min-height: 30px;
    }

    .flatpickr-confirm {
        color: hsl(0deg 0% 100%);
        background-color: hsl(213deg 90% 65%);
        font-size: 18px;
        font-weight: 600;
    }

    @media (width < $md_min) {
        /* Center align flatpickr on mobile
         * devices so that it doesn't go out of
         * the viewport. */
        left: 0 !important;
        right: 0 !important;
        margin: auto;

        &::after,
        &::before {
            border-top-width: 0 !important;
        }
    }
}

#about-zulip {
    .exit {
        font-size: 1.5rem;
        font-weight: 600;
        background-color: transparent;
        border: none;
        position: absolute;
        right: 8px;
        z-index: 1;
        color: hsl(0deg 0% 67%);
    }

    .overlay-content {
        width: 440px;
        border-radius: 4px;
    }

    .about-zulip-logo {
        text-align: center;
        margin: 30px;
    }

    .about-zulip-logo img {
        height: 40px;
    }

    & i.fa-copy {
        cursor: pointer;
    }

    .fa-copy:hover {
        color: hsl(170deg 48% 54%);
    }

    .overlay-body {
        max-height: 60vh;
        padding: 15px;
    }
}

@media (width < $xl_min) or (height < $short_navbar_cutoff_height) {
    .default-sidebar-behaviour {
        &.spectator-view.default-sidebar-behaviour {
            #navbar-middle {
                /* = (width of button, square with header) * 3 (number of buttons) + 10px extra margin. */
                margin-right: calc(var(--header-height) * 3 + 10px);
            }

            #help-menu,
            #gear-menu {
                position: relative;
                right: var(--header-height);
            }
        }

        &.spectator-view #top_navbar .column-right .spectator_login_buttons {
            display: none;
        }

        .header-main .column-right {
            /* For a diminutive right column in the navbar,
               allow the width to be that of the flexing
               button elements. */
            width: auto;
        }
    }
}

%hide-right-sidebar {
    .app-main .column-right {
        display: none;

        &.expanded {
            display: block;
            position: absolute;
            float: none;
            right: 15px;
            top: 0;

            .simplebar-track.simplebar-vertical {
                right: 0;
            }

            .right-sidebar {
                box-shadow: 0 -2px 3px 0 hsl(0deg 0% 0% / 10%);
                border-left: 1px solid var(--color-border-sidebar);
                padding-right: 15px;
                padding-left: 15px;
                height: 100%;
                right: 0;
                background-color: var(--color-background);
            }
        }
    }
}

#realm-navbar-icon-logo {
    display: none;
    width: 20px;
    height: 20px;
}

.hide-right-sidebar {
    @extend %hide-right-sidebar;

    &.fluid_layout_width {
        #compose-content,
        .app-main .column-middle {
            margin-right: 7px;
        }
    }
}

.hide-right-sidebar-by-visibility .app-main .column-right {
    visibility: hidden;
}

%hide-left-sidebar {
    .app-main .column-left {
        display: none;

        &.expanded {
            /* In the extended state, we open the sidebar
               to its maximum possible size (otherwise, it
               would be unnecessarily too narrow). */
            --left-sidebar-width: var(--left-sidebar-max-width);
            display: block;
            position: absolute;
            float: none;
            left: 0;
            top: 0;

            .left-sidebar {
                background-color: var(--color-background);
                box-shadow: 0 2px 3px 0 hsl(0deg 0% 0% / 10%);
                border-right: 1px solid var(--color-border-sidebar);
                height: 100%;
                padding-left: 10px;
                width: var(--left-sidebar-width);
            }
        }
    }
}

.hide-left-sidebar {
    @extend %hide-left-sidebar;

    &.fluid_layout_width {
        #compose-content,
        .app-main .column-middle {
            margin-left: 7px;
        }
    }
}

body:not(.hide-left-sidebar) {
    /* User can clearly see the unread count in the left sidebar. So,
       we don't need an indicator here as it will only serve as a disctraction. */
    #header-container .column-left .left-sidebar-toggle-unreadcount {
        display: none !important;
    }
}

@media (width < $xl_min) {
    .default-sidebar-behaviour {
        @extend %hide-right-sidebar;

        .app-main .column-middle {
            margin-right: 7px;
        }

        #navbar-middle {
            /* = (width of button, square with header) * 4 (number of buttons) + 3px extra margin. */
            margin-right: calc(var(--header-height) * 4 + 3px);
        }

        #typing_notifications,
        #scheduled_message_indicator,
        #compose-content {
            margin-right: 7px;
        }
    }

    .hide-left-sidebar {
        #compose-content,
        .app-main .column-middle {
            margin-left: 7px;
        }

        #realm-navbar-icon-logo {
            display: inline-block;
        }

        #realm-navbar-wide-logo {
            display: none;
        }

        #top_navbar .column-left {
            width: auto;
        }

        #navbar-middle {
            margin-left: var(--left-sidebar-width-with-realm-icon-logo);
        }
    }
}

@media (width < $md_min) {
    .default-sidebar-behaviour {
        @extend %hide-left-sidebar;

        .header-main .column-left {
            display: none;
        }

        .app-main .column-middle {
            margin-left: 7px;
            margin-right: 7px;
        }

        #navbar-middle {
            margin-left: 0;
        }

        .app-main .column-middle .column-middle-inner {
            margin-left: 0;
            margin-right: 0;
        }

        #streamlist-toggle {
            display: block;
        }

        .top-navbar-container {
            margin-left: 40px;
        }

        #feedback_container {
            width: calc(90% - 30px);
            left: 5%;
            top: 5%;
        }

        #typing_notifications,
        #scheduled_message_indicator,
        #compose-content {
            margin-left: 7px;
        }
    }
}

@media (height < $short_navbar_cutoff_height) {
    .app-main .column-right.expanded .right-sidebar,
    .app-main .column-left.expanded .left-sidebar {
        margin-top: var(--navbar-fixed-height);
        /* For very short screen sizes, skip the relatively large top padding. */
        padding-top: 0;
    }

    /* TODO: Properly and accurately align the
       topmost headers on the left and right
       sidebar. */
    .app-main .column-right.expanded .right-sidebar-items {
        margin-top: 10px;
    }

    .app-main .column-left.expanded .left-sidebar-navigation-area {
        margin-top: 10px;
    }

    /* Usually the styling is applied directly to the icon, but here
    the icon is `position: static`, so we can't. */
    .search_closed {
        top: 5px;
    }

    #streamlist-toggle,
    #message_view_header,
    #searchbox,
    .header {
        line-height: var(--header-height);
        height: var(--header-height);
    }

    .spectator_narrow_login_button {
        height: var(--header-height) !important;
    }

    .left-sidebar-toggle-button {
        height: var(--header-height);
    }

    nav
        .column-left
        .left-sidebar-toggle-button
        .left-sidebar-toggle-unreadcount {
        top: 5px;
        left: 16px;
    }

    .left-sidebar-toggle-unreadcount {
        /* Adjust in response to shorter navbar. */
        top: 5px;
        right: 4px;
    }

    #top_navbar .column-right #personal-menu .header-button-avatar {
        width: 20px;
        height: 20px;
    }
}

@media (width < $mm_min) {
    html {
        overflow-x: hidden;
    }

    /* We don't want user to experience Zulip below this width since
       we don't develop features for below this width. */
    body,
    html,
    .app-main,
    .header-main {
        min-width: 320px;
    }

    #compose #compose-content {
        margin-right: 5px;
        margin-left: 5px;
    }
}

#scroll-to-bottom-button-container {
    display: block;
    position: absolute;
    bottom: 41px;
    right: 0;
    visibility: hidden;
    opacity: 0;
    transition:
        visibility 500ms,
        opacity 500ms ease-in-out;

    &.show {
        visibility: visible;
        opacity: 1;
    }

    #scroll-to-bottom-button-clickable-area {
        width: 60px;
        height: 60px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;

        &:hover #scroll-to-bottom-button {
            background: hsl(240deg 96% 68%);
        }

        #scroll-to-bottom-button {
            text-align: center;
            width: 40px;
            height: 40px;
            background: hsl(240deg 96% 68% / 50%);
            border-radius: 50%;

            & .scroll-to-bottom-icon {
                color: hsl(0deg 0% 100%);
                margin: 0 auto;
                font-size: 21px;
                position: relative;
                top: 8px;
            }
        }
    }
}

.tooltip_right_arrow {
    position: relative;
    top: -1px;
    font-weight: 600;
}

.spectator_login_for_image_button {
    max-width: 250px;
    height: 50px;

    :hover {
        text-decoration: none;
    }

    .login_button {
        padding: 5px;
        margin-top: 5px;

        .fa {
            top: 1px;
        }
    }
}

.simplebar-content-wrapper {
    /* `simplebar-content-wrapper` has `tabindex=-1` set, which makes sure
       that it does not get focus when navigating via a keyboard.

       But in a few situations, we programmatically focus this
       element, and in this case, we don't want to see the outline. */
    outline: none;

    /* This prevents the popover from closing once the top/bottom is reached */
    overscroll-behavior: contain;
}

.popover-filter-input-wrapper {
    display: flex;

    .popover-filter-input {
        background: var(--color-background-widget-input);
        color: var(--color-text-dropdown-input);
        width: 100%;
        margin: 4px 4px 2px;

        &:focus {
            background: hsl(0deg 0% 100%);
            border: 1px solid hsl(229.09deg 21.57% 10% / 80%);
            box-shadow: 0 0 6px hsl(228deg 9.8% 20% / 30%);
        }
    }
}

.dropdown-list-container {
    .dropdown-list-wrapper {
        /* Sync with `max-height` in dropdown_widget. */
        max-height: 210px;
        /* 200px/14px */
        min-width: 14.285em;

        .dropdown-list {
            list-style: none;
            margin: 0;
        }
    }

    .no-dropdown-items {
        color: hsl(0deg 0% 60%);
        display: none;
        padding: 3px 10px 3px 8px;
        font-weight: 400;
        line-height: 20px;
        white-space: normal;
    }
}

.dropdown-list-container .list-item {
    color: var(--color-dropdown-item);

    &:focus {
        background-color: var(--background-color-active-dropdown-item);
        outline: none;
    }
}

.dropdown-list-container .dropdown-list .dropdown-list-item-common-styles {
    display: flex;
    color: var(--color-dropdown-item);
    padding: 3px 10px 3px 8px;
    gap: 4px;
    font-weight: 400;
    line-height: var(--base-line-height-unitless);
    white-space: normal;

    .stream-privacy-type-icon {
        font-size: 0.93em;
        width: 0.93em;
        height: 0.93em;
        padding-right: 2px;
    }

    .zulip-icon {
        margin-top: 2px;
    }

    &:focus,
    &:hover {
        color: var(--color-dropdown-item);
        text-decoration: none;
        background-color: var(--background-color-active-dropdown-item);
        outline: none;
    }
}

.dropdown-list-item-common-styles .dropdown-list-bold-selected {
    font-weight: 700;
}

#scheduled_messages_overlay .error-icon-message-recipient {
    width: 15px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-grow: 1;
    color: var(--color-failed-message-send-icon);

    .zulip-icon {
        padding: 5px;
    }
}

.emoji-popover-tab-item {
    .zulip-icon-star {
        position: relative;
        top: 2px;
    }
}

.header-main .column-right {
    display: flex;
    /* Make the top navbar right column its full width,
       less 7px of space on the left and right. */
    width: calc(var(--right-sidebar-width) - 7px - 7px);
    justify-content: flex-end;
    align-items: center;

    & a:focus {
        filter: none;
        outline: 0;
    }
}

.header-button {
    width: var(--header-height);
    height: var(--header-height);
    display: flex;
    justify-content: center;
    align-items: center;

    &:hover,
    &:focus {
        text-decoration: none;
    }

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

    &:active {
        background-color: var(--color-header-button-focus);
    }

    &:focus-visible {
        outline: none;
        background-color: var(--color-header-button-focus);
    }

    .zulip-icon {
        color: var(--color-navbar-icon);
    }

    .zulip-icon-gear {
        font-size: 18px;
    }

    .zulip-icon-help-bigger,
    .zulip-icon-user-list {
        font-size: 20px;
    }

    .zulip-icon-help {
        position: relative;
        top: 0.5px;
        right: -0.5px;
    }
}

#personal-menu {
    .header-button-avatar {
        width: 24px;
        height: 24px;
        background-size: cover;
        border-radius: 4px;
        background-color: var(--color-background-image-loader);
        border: 1px solid var(--color-border-personal-menu-avatar);
    }
}