When a HTML page has no CSS, browser render it by using an internal CSS

• when a HTML page has no CSS, do browser render it by using an internal CSS?
• https://x.com/i/grok/share/Xrcx938lA9f4MdDo8n73lLe8B

Google Chrome Browser Default Style Sheet

here's Google Chrome browser default style sheet

2025-12-17 from https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/html/resources/html.css

/*
 * The default style sheet used to render HTML.
 *
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

@namespace "http://www.w3.org/1999/xhtml";

html {
    display: block;
}

:root {
    view-transition-name: root;
}

:active-view-transition {
    view-transition-name: root;
}

/* generic block-level elements */

body {
    display: block;
    margin: 8px;
}

body:-webkit-full-page-media {
    background-color: rgb(0, 0, 0)
}

p {
    display: block;
    margin-block-start: 1__qem;
    margin-block-end: 1__qem;
    margin-inline-start: 0;
    margin-inline-end: 0;
}

div {
    display: block
}

article, aside, footer, header, hgroup, main, nav, search, section {
    display: block
}

marquee {
    display: inline-block;
    width: -webkit-fill-available;
}

address {
    display: block
}

blockquote {
    display: block;
    margin-block-start: 1__qem;
    margin-block-end: 1em;
    margin-inline-start: 40px;
    margin-inline-end: 40px;
}

figcaption {
    display: block
}

figure {
    display: block;
    margin-block-start: 1em;
    margin-block-end: 1em;
    margin-inline-start: 40px;
    margin-inline-end: 40px;
}

q {
    display: inline
}

q:before {
    content: open-quote;
}

q:after {
    content: close-quote;
}

center {
    display: block;
    /* special centering to be able to emulate the html4/netscape behaviour */
    text-align: -webkit-center
}

hr {
    display: block;
    overflow: hidden;
    margin-block-start: 0.5em;
    margin-block-end: 0.5em;
    margin-inline-start: auto;
    margin-inline-end: auto;
    border-style: inset;
    border-width: 1px;
    color: gray;
}

map {
    display: inline
}

video {
    object-fit: contain;
}

video:-webkit-full-page-media {
    margin: auto;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    max-height: 100%;
    max-width: 100%;
}

audio:not([controls]) {
  display: none !important;
}

/** TODO(crbug.com/985623): Remove these hard-coded audio tag size.
 * This fixed audio tag width/height leads to fail the wpt tests below.
 * crbug.com/955170 external/wpt/css/css-contain/contain-size-replaced-003a.html
 * crbug.com/955163 external/wpt/css/css-contain/contain-size-replaced-003b.html
 * crbug.com/955163 external/wpt/css/css-contain/contain-size-replaced-003c.html
 */
audio {
  width: 300px;
  height: 54px;
}

video, canvas, img {
  overflow: clip;
  overflow-clip-margin: content-box;
}

iframe, embed, object, fencedframe {
   overflow: clip !important;
   overflow-clip-margin: content-box !important;
}

/* heading elements */

h1 {
    display: block;
    font-size: 2em;
    margin-block-start: 0.67__qem;
    margin-block-end: 0.67em;
    margin-inline-start: 0;
    margin-inline-end: 0;
    font-weight: bold
}

@supports blink-feature(SpecialRulesForNestedH1Elements) {
  :-webkit-any(article,aside,nav,section) h1 {
      font-size: 1.5em;
      margin-block-start: 0.83__qem;
      margin-block-end: 0.83em;
  }

  :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) h1 {
      font-size: 1.17em;
      margin-block-start: 1__qem;
      margin-block-end: 1em;
  }

  :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) h1 {
      font-size: 1.00em;
      margin-block-start: 1.33__qem;
      margin-block-end: 1.33em;
  }

  :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) h1 {
      font-size: .83em;
      margin-block-start: 1.67__qem;
      margin-block-end: 1.67em;
  }

  :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) :-webkit-any(article,aside,nav,section) h1 {
      font-size: .67em;
      margin-block-start: 2.33__qem;
      margin-block-end: 2.33em;
  }
}

h2 {
    display: block;
    font-size: 1.5em;
    margin-block-start: 0.83__qem;
    margin-block-end: 0.83em;
    margin-inline-start: 0;
    margin-inline-end: 0;
    font-weight: bold
}

h3 {
    display: block;
    font-size: 1.17em;
    margin-block-start: 1__qem;
    margin-block-end: 1em;
    margin-inline-start: 0;
    margin-inline-end: 0;
    font-weight: bold
}

h4 {
    display: block;
    margin-block-start: 1.33__qem;
    margin-block-end: 1.33em;
    margin-inline-start: 0;
    margin-inline-end: 0;
    font-weight: bold
}

h5 {
    display: block;
    font-size: .83em;
    margin-block-start: 1.67__qem;
    margin-block-end: 1.67em;
    margin-inline-start: 0;
    margin-inline-end: 0;
    font-weight: bold
}

h6 {
    display: block;
    font-size: .67em;
    margin-block-start: 2.33__qem;
    margin-block-end: 2.33em;
    margin-inline-start: 0;
    margin-inline-end: 0;
    font-weight: bold
}

/* tables */

table {
    display: table;
    border-collapse: separate;
    border-spacing: 2px;
    border-color: gray;
    box-sizing: border-box;
    text-indent: initial
}

thead {
    display: table-header-group;
    vertical-align: middle;
    border-color: inherit
}

tbody {
    display: table-row-group;
    vertical-align: middle;
    border-color: inherit
}

tfoot {
    display: table-footer-group;
    vertical-align: middle;
    border-color: inherit
}

/* for tables without table section elements (can happen with XHTML or dynamically created tables) */
table > tr {
    vertical-align: middle;
}

col {
    display: table-column
}

colgroup {
    display: table-column-group
}

tr {
    display: table-row;
    vertical-align: inherit;
    border-color: inherit
}

td, th {
    display: table-cell;
    vertical-align: inherit;
}

/* When the td/th are inside a table (the normal case), the padding is taken
   care of by HTMLTableCellElement::AdditionalPresentationAttributeStyle(). */
td:not(table td),
th:not(table th) {
  padding: 1px;
}

th {
    font-weight: bold;
    text-align: -internal-center
}

caption {
    display: table-caption;
    text-align: -webkit-center
}

/* lists */

ul, menu, dir {
    display: block;
    list-style-type: disc;
    margin-block-start: 1__qem;
    margin-block-end: 1em;
    padding-inline-start: 40px
}

ol {
    display: block;
    list-style-type: decimal;
    margin-block-start: 1__qem;
    margin-block-end: 1em;
    padding-inline-start: 40px
}

li {
    display: list-item;
    text-align: match-parent;
}

:is(dir, dl, menu, ol, ul) dir,
:is(dir, dl, menu, ol, ul) dl,
:is(dir, dl, menu, ol, ul) menu,
:is(dir, dl, menu, ol, ul) ol,
:is(dir, dl, menu, ol, ul) ul {
    margin-block-start: 0;
    margin-block-end: 0;
}

:is(dir, menu, ol, ul) dir,
:is(dir, menu, ol, ul) menu,
:is(dir, menu, ol, ul) ul {
    list-style-type: circle
}

:is(dir, menu, ol, ul) :is(dir, menu, ol, ul) dir,
:is(dir, menu, ol, ul) :is(dir, menu, ol, ul) menu,
:is(dir, menu, ol, ul) :is(dir, menu, ol, ul) ul {
    list-style-type: square
}

/* TODO(crbug.com/40774317, crbug.com/354025385): We should add rule
   ol, ul, menu { counter-reset: list-item; }
   once it is supported. */

dd {
    display: block;
    margin-inline-start: 40px
}

dl {
    display: block;
    margin-block-start: 1__qem;
    margin-block-end: 1em;
}

dt {
    display: block
}

/* form elements */

form {
    display: block;
    margin-top: 0__qem;
}

:-webkit-any(table, thead, tbody, tfoot, tr) > form:-internal-is-html {
  display: none !important;
}

label {
    cursor: default;
}

fieldset {
    display: block;
    margin-inline: 2px;
    border: groove 2px ThreeDFace;
    padding-block: 0.35em 0.625em;
    padding-inline: 0.75em;
    min-inline-size: min-content;
}

legend {
    display: block;
    padding-inline: 2px;
}

legend[align=left i] {
    justify-self: left;
}

legend[align=center i] {
    justify-self: center;
}

legend[align=right i] {
    justify-self: right;
}

button {
    appearance: auto;
    -internal-align-content-block: center;
}

input, textarea, select, button {
    margin: 0__qem;
    font: -webkit-small-control;
    text-rendering: auto; /* FIXME: Remove when tabs work with optimizeLegibility. */
    color: FieldText;
    letter-spacing: normal;
    word-spacing: normal;
    line-height: normal;
    text-transform: none;
    text-indent: 0;
    text-shadow: none;
    display: inline-block;
    text-align: start;
}
@supports blink-feature(AppearanceBase) {
  /* TODO(crbug.com/450139531): Merge these styles with the above block when
   * these styles can apply to textarea, select, and button as well. */
  input {
    margin: -internal-auto-base(0__qem, unset);
    font: -internal-auto-base(-webkit-small-control, unset);
    /* FIXME: Remove text-rendering:auto when tabs work with optimizeLegibility. */
    text-rendering: -internal-auto-base(auto, unset);
    color: -internal-auto-base(FieldText, unset);
    letter-spacing: -internal-auto-base(normal, unset);
    word-spacing: -internal-auto-base(normal, unset);
    line-height: -internal-auto-base(normal, unset);
    text-shadow: -internal-auto-base(none, unset);
    /* text-transform, text-indent, and text-align are supposed to be set to
     * initial. Since the auto appearance is also using the initial values, we
     * don't need to use -internal-auto-base() on them. */
  }
}

textarea {
  appearance: auto;
  border: 1px solid light-dark(#767676, #858585);
  column-count: initial !important;
  -webkit-rtl-ordering: logical;
  resize: -internal-textarea-auto;
  cursor: text;
  padding: 2px;
  white-space: pre-wrap;
  word-wrap: break-word;
  background-color: Field;
  font-family: monospace;
}

input {
    appearance: auto;
    cursor: text;
    @supports blink-feature(AppearanceBase) {
        padding: -internal-auto-base(1px 0, unset);
        border: -internal-auto-base(2px inset light-dark(#767676, #858585), 1px solid);
        -webkit-rtl-ordering: -internal-auto-base(logical, unset);
        background-color: -internal-auto-base(Field, unset);
    }
    @supports not blink-feature(AppearanceBase) {
        padding: 1px 0;
        border: 2px inset light-dark(#767676, #858585);
        -webkit-rtl-ordering: logical;
        background-color: Field;
    }
}

input:not([type="file" i], [type="image" i], [type="checkbox" i], [type="radio" i]) {
    -internal-align-content-block: center;
}

input[type="search" i] {
    appearance: auto;
    box-sizing: border-box;
}

input::-webkit-textfield-decoration-container {
    display: flex !important;
    align-items: center;
    -webkit-user-modify: read-only !important;
    content: none !important;
    writing-mode: inherit !important;
}

input::-webkit-clear-button {
    appearance: auto;
    display: inline-block;
    cursor: default;
    flex: none;
    -webkit-user-modify: read-only !important;
    margin-inline-start: 2px;
    opacity: 0;
    pointer-events: none;
}

input:enabled:read-write:-webkit-any(:focus,:hover)::-webkit-clear-button {
    opacity: 1;
    pointer-events: auto;
}

input[type="search" i]::-webkit-search-cancel-button {
    appearance: auto;
    display: block;
    cursor: default;
    flex: none;
    -webkit-user-modify: read-only !important;
    margin-inline-start: 1px;
    margin-inline-end: 3px;
    opacity: 0;
    pointer-events: none;
    user-select: none !important;
}

input[type="search" i]:enabled:read-write:-webkit-any(:focus,:hover)::-webkit-search-cancel-button {
    opacity: 1;
    pointer-events: auto;
}

input[type="search" i]::-webkit-search-results-decoration {
  margin: auto 3px auto 2px;
}

/* Specifying all of the type attributes in the selector below does not seem
 * necessary and causes a performance issue when combined with
 * -internal-auto-base(), so the AppearanceBase one does not include the type
 * attribute selectors. */
@supports not blink-feature(AppearanceBase) {
  input,
  input[type="email" i],
  input[type="number" i],
  input[type="password" i],
  input[type="search" i],
  input[type="tel" i],
  input[type="text" i],
  input[type="url" i] {
    padding-block: 1px;
    padding-inline: 2px;
  }
}
@supports blink-feature(AppearanceBase) {
  input {
    padding-block: -internal-auto-base(1px, unset);
    padding-inline: -internal-auto-base(2px, unset);
  }
}

input[type="tel" i] {
  direction: ltr;
}

input::-webkit-inner-spin-button {
    appearance: auto;
    display: inline-block;
    cursor: default;
    flex: none;
    align-self: stretch;
    -webkit-user-modify: read-only !important;
    opacity: 0;
    pointer-events: none;
}

input:enabled:read-write:-webkit-any(:focus,:hover)::-webkit-inner-spin-button {
    opacity: 1;
    pointer-events: auto;
}

::-webkit-input-placeholder {
    -webkit-text-security: none;
    color: #757575;
    direction: inherit !important;
    pointer-events: none !important;
    text-orientation: inherit !important;
    writing-mode: inherit !important;
}

input::-webkit-input-placeholder {
    text-overflow: inherit;
    line-height: initial !important;
    white-space: pre;
    word-wrap: normal;
    overflow: hidden;
    -webkit-user-modify: read-only !important;
}

input::-internal-input-suggested {
    text-overflow: inherit;
    white-space: nowrap;
    overflow: hidden;
}

input::-internal-input-suggested,
textarea::-internal-input-suggested {
    font: -webkit-small-control !important;
    /* -webkit-small-control does not pin the font-feature-settings and we want
       previews to look consistent. */
    font-feature-settings: normal !important;
    /* Prevent that overflow affects the scrollable area. Without this,
       LayoutBox::*Scroll{Height,Width}() may determine the scroll width/height
       from the scrollable area instead of from the overrides in
       LayoutTextControl{Single,Multi}Line::Scroll{Height,Width}(). */
    overflow: hidden !important;
    overflow-anchor: none;
}

textarea::-internal-input-suggested {
  font-family: monospace !important;
}

input[type="password" i] {
    -webkit-text-security: disc !important;
}

input[type="password" i]::-internal-input-suggested:not(.reveal-password) {
    -webkit-text-security: disc !important;
}

input[type="password" i]::-internal-input-suggested.reveal-password {
    -webkit-text-security: none;
}

input[type="password" i]::-internal-reveal {
  width: 1.3em;
  height: 1.3em;
  cursor: default;
  flex: none;
  background-image: url(images/password_reveal_on.svg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  margin-left: 3px;
  margin-right: 3px;
}

input[type="password" i]::-internal-reveal.reveal {
  background-image: url(images/password_reveal_off.svg);
}

input[type="password" i]::-internal-reveal:hover,
input[type="password" i]::-internal-reveal:focus {
  border-radius: 1px;
  cursor: pointer;
}

input[type="hidden" i], input[type="image" i], input[type="file" i] {
    appearance: none;
    padding: initial;
    background-color: initial;
    border: initial;
    cursor: default;
}

input[type="file" i] {
    align-items: baseline;
    color: inherit;
    text-align: start !important;
    /* Prevent a malicious author from using a custom string for text-overflow
       to spoof a filename. */
    text-overflow: ellipsis !important;
    white-space: pre;
}

input[type="image" i] {
    cursor: pointer;
}

input[type="radio" i],
input[type="checkbox" i] {
    margin:3px 3px 3px 4px;
    padding: initial;
    background-color: initial;
    border: initial;
    cursor: default;
}

input[type="radio" i] {
  margin:3px 3px 0 5px;
}

input[type="button" i], input[type="submit" i], input[type="reset" i] {
    -internal-empty-line-height: fabricated;
    appearance: auto;
    user-select: none;
    white-space: pre
}

input[type="file" i]::-webkit-file-upload-button {
    appearance: auto;
    -webkit-user-modify: read-only !important;
    white-space: nowrap;
    margin: 0;
    margin-inline-end: 4px; /* See FileUploadControlIntrinsicInlineSize() */
    font-size: inherit;
}

input[type="button" i],
input[type="submit" i],
input[type="reset" i],
input[type="file" i]::-webkit-file-upload-button,
button {
    text-align: center;
    cursor: default;
    padding-block: 1px;
    padding-inline: 6px;
    border: 2px outset ButtonBorder;
    box-sizing: border-box;
    background-color: ButtonFace;
    color: ButtonText;
}

input[type="checkbox" i]:disabled,
input[type="file" i]:disabled,
input[type="hidden" i]:disabled,
input[type="image" i]:disabled,
input[type="radio" i]:disabled,
input[type="range" i]:disabled {
    background-color: initial;
}

input[type="range" i] {
    appearance: auto;
    padding: initial;
    border: initial;
    margin: 2px;
    cursor: default;
    color: light-dark(#101010, #ffffff);
}

input[type="range" i]::-webkit-slider-container,
input[type="range" i]::-webkit-media-slider-container {
    appearance: inherit;
    flex: 1;
    min-inline-size: 0;
    box-sizing: border-box;
    -webkit-user-modify: read-only !important;
    display: flex;
}

input[type="range" i]:-internal-has-datalist::-webkit-slider-container {
    /*
     * See LayoutThemeDefault. "22px" is
     * 2 * (SliderTickOffsetFromTrackCenter() + SliderTickSize().Height()).
     */
    min-block-size: 22px;
}

input[type="range" i]::-webkit-slider-runnable-track {
    flex: 1;
    min-inline-size: 0;
    align-self: center;

    box-sizing: border-box;
    -webkit-user-modify: read-only !important;
    display: block;
}

input[type="range" i]::-webkit-slider-thumb,
input[type="range" i]::-webkit-media-slider-thumb {
    appearance: auto;
    box-sizing: border-box;
    -webkit-user-modify: read-only !important;
    display: block;
}

input[type="range" i]:disabled {
  color: #c5c5c5;
}

input[type="button" i]:disabled,
input[type="submit" i]:disabled,
input[type="reset" i]:disabled,
input[type="color" i]:disabled,
input[type="file" i]:disabled::-webkit-file-upload-button,
button:disabled {
  background-color: light-dark(rgba(239, 239, 239, 0.3), rgba(19, 1, 1, 0.3));
  border-color: light-dark(rgba(118, 118, 118, 0.3), rgba(195, 195, 195, 0.3));
  color: light-dark(rgba(16, 16, 16, 0.3), rgba(255, 255, 255, 0.3));
}

input[type="button" i]:active, input[type="submit" i]:active, input[type="reset" i]:active, input[type="file" i]:active::-webkit-file-upload-button, button:active {
    border-style: inset
}

input[type="button" i]:active:disabled, input[type="submit" i]:active:disabled, input[type="reset" i]:active:disabled, input[type="file" i]:active:disabled::-webkit-file-upload-button, button:active:disabled {
    border-style: outset
}

input:disabled, textarea:disabled {
    cursor: default;
    background-color: light-dark(rgba(239, 239, 239, 0.3), rgba(59, 59, 59, 0.3));
    color: light-dark(#545454, #aaaaaa);
}

option:-internal-spatial-navigation-focus {
    outline: light-dark(black, white) dashed 1px;
    outline-offset: -1px;
}

input:not([type="image" i], [type="range" i], [type="checkbox" i], [type="radio" i]) {
  overflow: clip !important;
  overflow-clip-margin: 0px !important;
}

/* https://html.spec.whatwg.org/multipage/rendering.html#hidden-elements */
/* TODO(crbug.com/1231263): <area> should be display:none. */
area {
  display: inline;
}
base, basefont, datalist, head, link, meta, noembed,
noframes, param, rp, script, style, template, title {
  display: none;
}
input[type="hidden" i] {
  display: none !important;
}

area:-webkit-any-link {
    cursor: pointer;
}

input[type="checkbox" i] {
    appearance: auto;
    box-sizing: border-box;
}

input[type="radio" i] {
    appearance: auto;
    box-sizing: border-box;
}

input[type="color" i] {
    appearance: auto;
    inline-size: 50px;
      block-size: 27px;
    /* Same as native_theme_base. */
    border: 1px solid ButtonBorder;
    padding: 1px 2px;
    cursor: default;
    box-sizing: border-box;
    background-color: ButtonFace;
    color: ButtonText;
}

input[type="color" i]::-webkit-color-swatch-wrapper {
    display: flex;
    padding: 4px 2px;
    box-sizing: border-box;
    -webkit-user-modify: read-only !important;
    width: 100%;
    height: 100%
}

input[type="color" i]::-webkit-color-swatch {
    /* The swatch should not be affected by color scheme. */
    color-scheme: only light;
    background-color: #000000;
    border: 1px solid #777777;
    flex: 1;
    min-width: 0;
    -webkit-user-modify: read-only !important;
}

input::-webkit-calendar-picker-indicator {
    display: inline-block;
    inline-size: 0.66em;
    block-size: 0.66em;
    padding-block: 0.17em;
    padding-inline: 0.34em;
    -webkit-user-modify: read-only !important;
    opacity: 0;
    cursor: default;
    pointer-events: none;
}

input::-webkit-calendar-picker-indicator:hover {
    background-color: #eee;
}

input:enabled:read-write:-webkit-any(:focus,:hover)::-webkit-calendar-picker-indicator,
input::-webkit-calendar-picker-indicator:focus {
    opacity: 1;
    pointer-events: auto;
}

input[type="date" i]:disabled::-webkit-clear-button,
input[type="date" i]:disabled::-webkit-inner-spin-button,
input[type="datetime-local" i]:disabled::-webkit-clear-button,
input[type="datetime-local" i]:disabled::-webkit-inner-spin-button,
input[type="month" i]:disabled::-webkit-clear-button,
input[type="month" i]:disabled::-webkit-inner-spin-button,
input[type="week" i]:disabled::-webkit-clear-button,
input[type="week" i]:disabled::-webkit-inner-spin-button,
input:disabled::-webkit-calendar-picker-indicator,
input[type="date" i][readonly]::-webkit-clear-button,
input[type="date" i][readonly]::-webkit-inner-spin-button,
input[type="datetime-local" i][readonly]::-webkit-clear-button,
input[type="datetime-local" i][readonly]::-webkit-inner-spin-button,
input[type="month" i][readonly]::-webkit-clear-button,
input[type="month" i][readonly]::-webkit-inner-spin-button,
input[type="week" i][readonly]::-webkit-clear-button,
input[type="week" i][readonly]::-webkit-inner-spin-button,
input[readonly]::-webkit-calendar-picker-indicator {
    visibility: hidden;
}

/* Form controls that measure the inline size without doing actual layout
   need to disable `text-autospace`, if their content can be affected by
   the property. crbug.com/1484863 */
input[type="date" i], input[type="datetime-local" i], input[type="month" i],
input[type="week" i], select {
    text-autospace: no-autospace !important;
}

select {
    appearance: auto;
    box-sizing: border-box;
    align-items: center;
    white-space: pre;
    -webkit-rtl-ordering: logical;
    color: FieldText;
    background-color: Field;
    border: 1px solid light-dark(#767676, #858585);
    cursor: default;
    border-radius: 0;
}

select:disabled {
    @supports blink-feature(CustomizableSelectInPage) {
        opacity: -internal-auto-base(0.7, unset);
    }
    @supports not blink-feature(CustomizableSelectInPage) {
        opacity: 0.7;
    }
}

/* -internal-list-box is how we specify select[multiple] */
/* select[multiple] is an exception to the prohibition on sizes here
   because it is one of the few controls with borders that grow on zoom
   (to solve a nasty scrollbar location problem) */
select:-internal-list-box {
    appearance: auto;
    @supports blink-feature(CustomizableSelectInPage) {
      border-radius: -internal-auto-base(2px, 0);
      align-items: -internal-auto-base(flex-start, initial);
      overflow-inline: -internal-auto-base(hidden, auto);
      overflow-block: -internal-auto-base(scroll, auto);
      vertical-align: -internal-auto-base(text-bottom, initial);
      white-space: -internal-auto-base(nowrap, inherit);
      field-sizing: -internal-auto-base(initial, content);
      border: -internal-auto-base(1px solid light-dark(#767676, #858585), 1px solid currentColor);
      box-sizing: -internal-auto-base(border-box, initial);
      block-size: -internal-auto-base(initial, calc(max(24px, 1lh) * attr(size type(<integer>), 4)));
    }
    @supports not blink-feature(CustomizableSelectInPage) {
      border-radius: 2px;
      align-items: flex-start;
      overflow-inline: hidden;
      overflow-block: scroll;
      vertical-align: text-bottom;
      white-space: nowrap;
    }
}

select:not(:-internal-list-box) {
    overflow: visible !important;
}

/* The padding here should match the value of
   |extraPaddingForOptionInsideOptgroup| in list_picker.js, which is the
   padding for select optgroup option. */
select:-internal-list-box optgroup option {
    @supports blink-feature(CustomizableSelectInPage) {
        padding-inline-start: -internal-auto-base(20px, 0.5em);
    }
    @supports not blink-feature(CustomizableSelectInPage) {
        padding-inline-start: 20px;
    }
}

/* TODO(crbug.com/357649033): This line-height rule can't be undone for
 * customizable select multiple because we can't put !important inside
 * -internal-auto-base(). */
select:-internal-list-box option,
select:-internal-list-box optgroup {
    line-height: initial !important;
}

/* option selected, list-box focused.
 * Sites are relying on the !important here: http://crbug.com/415953695 */
select:-internal-list-box:focus option:checked,
select:-internal-list-box:focus option:checked:hover {
    background-color: SelectedItem !important;
    color: SelectedItemText !important;
}
select:-internal-list-box:focus option:checked:disabled {
    background-color: -internal-inactive-list-box-selection !important;
}

/* option selected, list-box not focused */
@supports blink-feature(CustomizableSelectInPage) {
    select:-internal-list-box option:checked,
    select:-internal-list-box option:checked:hover {
        background-color: -internal-auto-base(light-dark(#cecece, #545454), transparent);
        color: -internal-auto-base(light-dark(#101010, #FFFFFF), inherit);
    }
    select:-internal-list-box:not(:focus) option:checked:enabled:hover,
    select:-internal-list-box:not(:focus) option:checked:enabled:active {
        background-color: -internal-auto-base(
            light-dark(#cecece, #545454),
            color-mix(in lab, currentColor 10%, transparent));
    }
    select:-internal-list-box option:checked:disabled:hover,
    select:-internal-list-box option:checked:disabled:active {
        background-color: -internal-auto-base(
            light-dark(#cecece, #545454),
            color-mix(in lab, currentColor 50%, transparent));
    }
}
@supports not blink-feature(CustomizableSelectInPage) {
    select:-internal-list-box option:checked,
    select:-internal-list-box option:checked:hover {
        background-color: light-dark(#cecece, #545454);
        color: light-dark(#101010, #FFFFFF);
    }
}

select:-internal-list-box:disabled option:checked,
select:-internal-list-box option:checked:disabled,
select:-internal-list-box option:checked:disabled:hover {
    @supports blink-feature(CustomizableSelectInPage) {
        color: -internal-auto-base(light-dark(gray, #aaa), color-mix(in lab, currentColor 50%, transparent));
    }
    @supports not blink-feature(CustomizableSelectInPage) {
        color: light-dark(gray, #aaa);
    }
}
@supports blink-feature(CustomizableSelectInPage) {
    select:-internal-list-box:disabled option:checked {
        /* base color is set to inherit here because we are inheriting a color that
         * is already 50% transparent from select:disabled. */
       color: -internal-auto-base(light-dark(gray, #aaa), inherit);
    }
}

/* TODO(crbug.com/406464760): decide on <hr> styles for customizable select
 * multiple. */
select:-internal-list-box hr {
    border-style: none;
    margin-block-start: 0.5em;
    margin-block-end: 0;
}

/* TODO(crbug.com/357649033): Consider undoing these styles for customizable
 * select. It is unlikely that they will be hit because customizable select
 * in-page is not focusable by default. */
select:-internal-list-box:focus-visible option:-internal-multi-select-focus {
    outline: auto 1px -webkit-focus-ring-color;
    outline-offset: -1px;
}

@supports blink-feature(CustomizableSelectInPage) {
    select option:enabled:hover {
        background-color: -internal-auto-base(initial, color-mix(in lab, currentColor 10%, transparent));
    }
}
@supports not blink-feature(CustomizableSelectInPage) {
    select:-internal-list-box option:hover {
        background-color: initial;
    }
}

optgroup {
    font-weight: bolder;
    display: block;
}

optgroup::-internal-optgroup-label {
    padding: 0 2px 1px 2px;
    min-height: 1.2em;
}

option {
    @supports blink-feature(CustomizableSelectInPage) {
        font-weight: -internal-auto-base(normal, inherit);
        display: -internal-auto-base(block, flex);
        padding-inline: -internal-auto-base(2px, 0.5em);
        padding-block-start: 0;
        padding-block-end: -internal-auto-base(1px, 0);
        white-space: nowrap;
        min-inline-size: -internal-auto-base(unset, 24px);
        min-block-size: -internal-auto-base(1.2em, max(24px, 1lh));
        gap: -internal-auto-base(unset, 0.5em);
        align-items: -internal-auto-base(unset, center);
    }
    @supports not blink-feature(CustomizableSelectInPage) {
        font-weight: normal;
        display: block;
        padding-inline: 2px;
        padding-block-start: 0;
        padding-block-end: 1px;
        white-space: nowrap;
        min-block-size: 1.2em;
    }
}

/* The following select style rules have to go after the other
   select styles in order to have higher precedence. */

/* TODO(crbug.com/880258): Use different styles for
  `-internal-autofill-previewed` and `-internal-autofill-selected`. */
input:-internal-autofill-previewed,
input:-internal-autofill-selected,
textarea:-internal-autofill-previewed,
textarea:-internal-autofill-selected,
select:-internal-autofill-previewed,
select:-internal-autofill-selected {
  appearance: menulist-button;
  background-image:none !important;
  background-color: light-dark(#E8F0FE, rgba(70,90,126,0.4)) !important;
  color: FieldText !important;
}

input:disabled,
textarea:disabled {
  border-color: rgba(118, 118, 118, 0.3);
}
select:disabled {
  @supports blink-feature(CustomizableSelectInPage) {
    border-color: -internal-auto-base(rgba(118, 118, 118, 0.3), currentColor);
  }
  @supports not blink-feature(CustomizableSelectInPage) {
    border-color: rgba(118, 118, 118, 0.3);
  }
}

select:disabled,
optgroup:disabled,
option:disabled,
select[disabled]>option {
    @supports blink-feature(CustomizableSelectInPage) {
        color: -internal-auto-base(
            light-dark(GrayText, #aaa),
            color-mix(in lab, currentColor 50%, transparent));
    }
    @supports not blink-feature(CustomizableSelectInPage) {
        color: light-dark(GrayText, #aaa);
    }
}
@supports blink-feature(CustomizableSelectInPage) {
    /* base color is set to inherit here because we are inheriting a color that
     * is already 50% transparent from select:disabled. */
    select:disabled option,
    optgroup:disabled option {
        color: -internal-auto-base(
            light-dark(GrayText, #aaa),
            inherit);
    }
}

output {
    display: inline;
}

/* meter */

meter {
-webkit-user-modify: read-only !important;
appearance: auto;
block-size: 1em;
box-sizing: border-box;
display: inline-block;
inline-size: 5em;
vertical-align: -0.2em;
}

meter::-webkit-meter-inner-element {
-webkit-user-modify: read-only !important;
appearance: inherit;
block-size: 100%;
box-sizing: inherit;
display: grid;
grid-template-rows: 1fr [line1] 2fr [line2] 1fr;
inline-size: 100%;
position: relative;
}

meter::-webkit-meter-bar {
-webkit-user-modify: read-only !important;
align-self: unsafe center;
background: linear-gradient(to bottom, #ddd, #eee 20%, #ccc 45%, #ccc 55%, #ddd);
block-size: 100%;
box-sizing: border-box;
grid-row-end: line2;
grid-row-start: line1;
inline-size: 100%;
overflow: hidden;
position: absolute;
}

meter::-webkit-meter-bar:-internal-shadow-host-has-non-auto-appearance {
background: light-dark(#efefef, #3B3B3B);
border-radius: 20px;
border: thin solid light-dark(rgba(118, 118, 118, 0.3), #858585);
}

meter::-webkit-meter-optimum-value {
-webkit-user-modify: read-only !important;
background: linear-gradient(to bottom, #ad7, #cea 20%, #7a3 45%, #7a3 55%, #ad7);
block-size: 100%;
box-sizing: border-box;
}

meter::-webkit-meter-optimum-value:-internal-shadow-host-has-non-auto-appearance {
background: light-dark(#107c10, #74b374);
}

meter::-webkit-meter-suboptimum-value {
-webkit-user-modify: read-only !important;
background: linear-gradient(to bottom, #fe7, #ffc 20%, #db3 45%, #db3 55%, #fe7);
block-size: 100%;
box-sizing: border-box;
}

meter::-webkit-meter-suboptimum-value:-internal-shadow-host-has-non-auto-appearance {
background: light-dark(#ffb900, #f2c812);
}

meter::-webkit-meter-even-less-good-value {
-webkit-user-modify: read-only !important;
background: linear-gradient(to bottom, #f77, #fcc 20%, #d44 45%, #d44 55%, #f77);
block-size: 100%;
box-sizing: border-box;
}

meter::-webkit-meter-even-less-good-value:-internal-shadow-host-has-non-auto-appearance {
background: light-dark(#d83b01, #e98f6d);
}

/* progress */

progress {
    appearance: auto;
    box-sizing: border-box;
    display: inline-block;
    block-size: 1em;
    inline-size: 10em;
    vertical-align: -0.2em;
}

progress::-webkit-progress-inner-element {
    box-sizing: inherit;
    -webkit-user-modify: read-only;
    block-size: 100%;
    inline-size: 100%;
}

progress::-webkit-progress-bar {
    background-color: gray;
    block-size: 100%;
    inline-size: 100%;
    -webkit-user-modify: read-only !important;
    box-sizing: border-box;
}

progress::-webkit-progress-value {
    background-color: green;
    block-size: 100%;
    inline-size: 50%; /* should be removed later */
    -webkit-user-modify: read-only !important;
    box-sizing: border-box;
}

/* inline elements */

u, ins {
    text-decoration: underline
}

abbr[title], acronym[title] {
    text-decoration: dotted underline;
}

strong, b {
    font-weight: bolder;
}

i, cite, em, var, address, dfn {
    font-style: italic
}

tt, code, kbd, samp {
    font-family: monospace
}

pre, xmp, plaintext, listing {
    display: block;
    font-family: monospace;
    white-space: pre;
    margin-block: 1__qem;
    margin-inline: 0;
}

mark {
    background-color: Mark;
    color: MarkText;
}

big {
    font-size: larger
}

small {
    font-size: smaller
}

s, strike, del {
    text-decoration: line-through
}

sub {
    vertical-align: sub;
    font-size: smaller
}

sup {
    vertical-align: super;
    font-size: smaller
}

nobr {
    white-space: nowrap
}

/* states */

:-internal-selector-fragment-anchor {
    outline: Highlight 3px solid;
}

:focus-visible {
    outline: auto 1px -webkit-focus-ring-color
}

button[interestfor] {
  user-select: none;
}

[interestfor]::interest-hint {
  user-select: none;
  color: buttontext;
  display: inline-block;
  text-align: center;
  cursor: default;
  background-color: buttonface;
  margin-inline-start: 0.5em;
  padding-block: 1px;
  padding-inline: 6px;
  border-width: 1px;
  border-radius: 5px;
  border-style: outset;
  border-color: buttonborder;
}

html:focus-visible, body:focus-visible {
    outline: none
}

embed:focus-visible, iframe:focus-visible, object:focus-visible {
    outline: none
}

input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline-offset: 0;
}

input[type="button" i]:focus-visible,
input[type="file" i]:focus-visible,
input[type="hidden" i]:focus-visible,
input[type="image" i]:focus-visible,
input[type="reset" i]:focus-visible,
input[type="submit" i]:focus-visible,
input[type="file" i]:focus-visible::-webkit-file-upload-button {
    outline-offset: 0
}

input[type="checkbox" i]:focus-visible,
input[type="radio" i]:focus-visible {
  outline-offset: 2px;
}

input[type="date" i]::-webkit-calendar-picker-indicator,
input[type="datetime-local" i]::-webkit-calendar-picker-indicator,
input[type="month" i]::-webkit-calendar-picker-indicator,
input[type="week" i]::-webkit-calendar-picker-indicator {
  background-image: light-dark(url(images/calendar_icon.svg), url(images/calendar_icon_white.svg));
  background-origin: content-box;
  background-repeat: no-repeat;
  background-size: contain;
  block-size: 1.0em;
  inline-size: 1.0em;
  opacity: 1;
  outline: none;
  padding: 2px;
}

input[type="time" i]::-webkit-calendar-picker-indicator {
  background-image: light-dark(url(images/time_icon.svg), url(images/time_icon_white.svg));
  background-origin: content-box;
  background-repeat: no-repeat;
  background-size: contain;
  opacity: 1;
  outline: none;
  margin-inline-start: 8px;
  padding-inline-start: 3px;
  padding-inline-end: 3px;
  padding-block: 3px;
  block-size: 1.05em;
  inline-size: 1.05em;
}

input[type="date" i]::-webkit-calendar-picker-indicator:focus-visible,
input[type="datetime-local" i]::-webkit-calendar-picker-indicator:focus-visible,
input[type="month" i]::-webkit-calendar-picker-indicator:focus-visible,
input[type="week" i]::-webkit-calendar-picker-indicator:focus-visible,
input[type="time" i]::-webkit-calendar-picker-indicator:focus-visible {
  outline-style: solid;
  outline-width: 2px;
  /* -webkit-focus-ring-color would ideally change from black to white when
  * color-scheme:dark is present, but it doesn't when we also set
  * outline-style:solid. */
  outline-color: light-dark(-webkit-focus-ring-color, white);
  outline-offset: -2px;
}

input::-webkit-calendar-picker-indicator:hover {
  background-color: initial;
}

input::-webkit-datetime-edit-ampm-field:focus,
input::-webkit-datetime-edit-day-field:focus,
input::-webkit-datetime-edit-hour-field:focus,
input::-webkit-datetime-edit-millisecond-field:focus,
input::-webkit-datetime-edit-minute-field:focus,
input::-webkit-datetime-edit-month-field:focus,
input::-webkit-datetime-edit-second-field:focus,
input::-webkit-datetime-edit-week-field:focus,
input::-webkit-datetime-edit-year-field:focus {
    background-color: light-dark(highlight, #99C8FF);
    color: light-dark(highlighttext, #000000);
    outline: none;
}

input::-webkit-datetime-edit-year-field[disabled],
input::-webkit-datetime-edit-month-field[disabled],
input::-webkit-datetime-edit-week-field[disabled],
input::-webkit-datetime-edit-day-field[disabled],
input::-webkit-datetime-edit-ampm-field[disabled],
input::-webkit-datetime-edit-hour-field[disabled],
input::-webkit-datetime-edit-millisecond-field[disabled],
input::-webkit-datetime-edit-minute-field[disabled],
input::-webkit-datetime-edit-second-field[disabled] {
    color: light-dark(GrayText, rgb(165, 165, 165));
}

a:-webkit-any-link {
    color: -webkit-link;
    text-decoration: underline;
    cursor: pointer;
}

a:-webkit-any-link:active {
    color: -webkit-activelink
}

a:-webkit-any-link:read-write {
    cursor: text;
}

a:-webkit-any-link:focus-visible {
  outline-offset: 1px;
}

/* HTML5 ruby elements */

ruby, rt {
    text-indent: 0; /* blocks used for ruby rendering should not trigger this */
}

ruby {
    display: ruby;
}

rt {
    line-height: normal;
    text-emphasis: none;
}

ruby > rt {
    display: ruby-text;
    font-size: 50%;
    text-align: start;
}

/* other elements */

frameset, frame {
    display: block
}

frameset {
    border-color: inherit
}

iframe {
    border: 2px inset
}

fencedframe {
    border: 2px inset;
    object-fit: contain !important;
    object-position: 50% 50% !important;
}

details {
    display: block
}

summary {
    display: block
}

/*
 * https://html.spec.whatwg.org/C/#the-details-and-summary-elements
 * The specification doesn't have |details >| and |:first-of-type|.
 * We add them because:
 *   - We had provided |summary { display: block }| for a long time,
 *     there are sites using <summary> without details, and they
 *     expect that <summary> is not a list-item.
 *   - Firefox does so.
 */
details > summary:first-of-type {
    display: list-item;
    counter-increment: list-item 0;
    list-style: disclosure-closed inside;
}

details[open] > summary:first-of-type {
    list-style-type: disclosure-open;
}

/* https://html.spec.whatwg.org/multipage/rendering.html#bidi-rendering */
/* This chunk of styles interacts with the `name == html_names::kDirAttr` case
   in HTMLElement::CollectStyleForPresentationAttribute(). Make sure any changes
   here are congruent with changes made there. */
address, blockquote, center, div, figure, figcaption, footer, form, header, hr,
legend, listing, main, p, plaintext, pre, summary, xmp, article, aside, h1, h2,
h3, h4, h5, h6, hgroup, nav, section, search, table, caption, colgroup, col,
thead, tbody, tfoot, tr, td, th, dir, dd, dl, dt, menu, ol, ul, li, bdi,
output, [dir=ltr i], [dir=rtl i], [dir=auto i] {
    unicode-bidi: isolate;
}
bdo, bdo[dir] {
    unicode-bidi: isolate-override;
}
textarea[dir=auto i], pre[dir=auto i] {
    unicode-bidi: plaintext;
}

dialog {
    /* https://html.spec.whatwg.org/multipage/rendering.html#flow-content-3 */
    position: absolute;
    inset-inline-start: 0;
    inset-inline-end: 0;
    width: fit-content;
    height: fit-content;
    margin: auto;
    border: solid;
    padding: 1em;
    background-color: Canvas;
    color: CanvasText;
}

/* Note that these can't use `dialog:modal` because a dialog stops matching
   :modal as soon as dialog.close() is called, but it needs to retain its
   styling until it's removed from the top layer, which can happen later due
   to animations of the `overlay` property. */
dialog:-internal-dialog-in-top-layer {
    /* https://html.spec.whatwg.org/multipage/rendering.html#flow-content-3 */
    position: fixed;
    overflow: auto;
    inset-block-start: 0;
    inset-block-end: 0;
    max-width: calc(100% - 6px - 2em);
    max-height: calc(100% - 6px - 2em);
    /* https://github.com/w3c/csswg-drafts/issues/6939#issuecomment-1016679588 */
    user-select: text;
    visibility: visible;
}

[popover] {
    position: fixed;
    position-anchor: auto;
    inset: 0;
    width: fit-content;
    height: fit-content;
    margin: auto;
    border: solid;
    padding: 0.25em;
    overflow: auto;
    color: CanvasText;
    background-color: Canvas;
}

/* dialog and popover handling of `display`. We need to be careful to get the
   `<dialog popover>` case working correctly, when open as a dialog.
   The `:where()` is added to lower the specificity so it doesn't take
   precedence over the [popover]:popover-open` rule just below. */
/* TODO(crbug.com/428039233): it would be cleaner if this was dialog:open,
   rather than dialog[open]. But that crashes. */
dialog:not([open]), [popover]:where(:not(:popover-open)) {
    display: none;
}
/* TODO(crbug.com/428039233): it would be cleaner if this was dialog:open,
   rather than dialog[open]. But that crashes. */
dialog[open], [popover]:popover-open {
    display: block;
}

dialog:-internal-dialog-in-top-layer::backdrop,
[popover]:-internal-popover-in-top-layer::backdrop {
    /* From the (modified) fullscreen spec: https://fullscreen.spec.whatwg.org/#user-agent-level-style-sheet-defaults: */
    position: fixed;
    inset: 0;
}

/* Note that these can't use `:modal` or `:popover-open`, because those pseudo
   classes stop matching as soon as the element is requested to be removed from
   the top layer (e.g. via popover.hidePopover() or dialog.close()). But the
   ::backdrop needs to be retained until the element is actually removed from
   the top layer, which can happen later due to animations of the
   `overlay` property. */
dialog:-internal-dialog-in-top-layer::backdrop {
    /* https://html.spec.whatwg.org/multipage/rendering.html#flow-content-3 */
    background-color: rgba(0,0,0,0.1);
}

[popover]:-internal-popover-in-top-layer::backdrop {
    pointer-events: none !important;
    background-color: transparent;
}

/* The `overlay:auto` UA rule goes away as soon as the modal is requested to
   close, or popover.hidePopover() is called. However, it can stay in the top
   layer after this point, if developer CSS animates the `overlay` property. */
dialog:modal, [popover]:popover-open {
    overlay: auto !important;
}

@supports blink-feature(MenuElements) {
    /* TODO(crbug.com/422803239): This should be combined with the [popover]
     * rule above when we remove this flag. */
    menulist:not(:popover-open) {
      display: none;
    }
}

@supports blink-feature(HTMLAnchorAttribute) {
    /* Popovers using anchor positioning get their inset properties reset, to make
    * it easier to position them. */
    [popover][anchor] {
        inset:auto;
    }
}

slot {
    display: contents;
}

/* Pagination */

@media print {
  @page {
    /* https://drafts.csswg.org/css-page-3/#margin-text-alignment */
    @top-left-corner {
      text-align: right;
      vertical-align: middle;
    }
    @top-left {
      text-align: left;
      vertical-align: middle;
    }
    @top-center {
      text-align: center;
      vertical-align: middle;
    }
    @top-right {
      text-align: right;
      vertical-align: middle;
    }
    @top-right-corner {
      text-align: left;
      vertical-align: middle;
    }
    @right-top {
      text-align: center;
      vertical-align: top;
    }
    @right-middle {
      text-align: center;
      vertical-align: middle;
    }
    @right-bottom {
      text-align: center;
      vertical-align: bottom;
    }
    @bottom-right-corner {
      text-align: left;
      vertical-align: middle;
    }
    @bottom-right {
      text-align: right;
      vertical-align: middle;
    }
    @bottom-center {
      text-align: center;
      vertical-align: middle;
    }
    @bottom-left {
      text-align: left;
      vertical-align: middle;
    }
    @bottom-left-corner {
      text-align: right;
      vertical-align: middle;
    }
    @left-bottom {
      text-align: center;
      vertical-align: bottom;
    }
    @left-middle {
      text-align: center;
      vertical-align: middle;
    }
    @left-top {
      text-align: center;
      vertical-align: top;
    }
  }

  /* Allows table headers and footers to print at the top / bottom of each
     page. */
  thead { break-inside: avoid; }
  tfoot { break-inside: avoid; }
}

/* spelling/grammar error pseudos */

html::spelling-error {
    text-decoration: -internal-spelling-error-color spelling-error;
}

html::grammar-error {
    text-decoration: -internal-grammar-error-color grammar-error;
}

img:is([sizes="auto" i], [sizes^="auto," i]) {
  contain: size !important;
  contain-intrinsic-size: 300px 150px;
}

/* https://drafts.csswg.org/css-ui-4/#inertness */
/* Reducing specificity with :where since [inert] needs to override. Also
   explicitly use 'dialog' to avoid adding universal bucket rule. Separate rule
   added for :fullscreen in fullscreen.css. */
dialog:where(:modal) {
  interactivity: auto;
}

/* Remove this when the InteractivityInertImportant flag is removed. */
[inert] {
  interactivity: inert;
}
@supports blink-feature(InteractivityInertImportant) {
  [inert] {
    interactivity: inert !important;
  }
}

/* noscript is handled internally, as it depends on settings. */

@supports not blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box):not([multiple]) {
    font: -internal-auto-base(-webkit-small-control, inherit);
    text-shadow: -internal-auto-base(none, inherit);
    text-transform: -internal-auto-base(none, initial);
    text-rendering: -internal-auto-base(auto, inherit);
    letter-spacing: -internal-auto-base(normal, inherit);
    word-spacing: -internal-auto-base(normal, inherit);
    text-align: -internal-auto-base(start, initial);
    text-indent: -internal-auto-base(0px, initial);
    -webkit-rtl-ordering: -internal-auto-base(logical, inherit);
    cursor: -internal-auto-base(default, inherit);
    white-space: -internal-auto-base(pre, inherit);
    /* This text-autospace rule won't work because it is set with !important
     * earlier in the UA stylesheet. After merging with the rest of the UA
     * style rules when removing the CustomizableSelect flag, it should start
     * to work. */
    text-autospace: -internal-auto-base(no-autospace !important, inherit);
    color: -internal-auto-base(FieldText, inherit);
    background-color: -internal-auto-base(Field, transparent);
    border: 1px solid -internal-auto-base(light-dark(#767676, #858585), currentColor);
    padding-block: -internal-auto-base(0, 0.25em);
    padding-inline: -internal-auto-base(0, 0.5em);

    /* min-size rules ensure that we meet accessibility guidelines for minimum target size.
     * https://github.com/openui/open-ui/issues/1026
     * https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html */
    /* TODO(crbug.com/1511354): This might be able to be combined with the
     * default select option rules at some point. This should be re-evaluated
     * before StylableSelect is shipped. */
    min-inline-size: -internal-auto-base(auto, calc-size(auto, max(size, 24px)));
    /* The 1lh here makes sure that options with no text still make the button
     * have the same height as options with text. */
    min-block-size: -internal-auto-base(auto, calc-size(auto, max(size, 24px, 1lh)));

    gap: -internal-auto-base(initial, 0.5em);
    border-radius: -internal-auto-base(0, 0.5em);
    align-items: -internal-auto-base(center, unset);
    /* https://github.com/whatwg/html/issues/10876 */
    user-select: -internal-auto-base(auto, none);
  }
}
@supports blink-feature(SelectMobileDesktopParity) {
  /* These styles are identical to the not blink-feature block above, except
   * that the :not([multiple]) part is removed. */
  select:not(:-internal-list-box) {
    font: -internal-auto-base(-webkit-small-control, inherit);
    text-shadow: -internal-auto-base(none, inherit);
    text-transform: -internal-auto-base(none, initial);
    text-rendering: -internal-auto-base(auto, inherit);
    letter-spacing: -internal-auto-base(normal, inherit);
    word-spacing: -internal-auto-base(normal, inherit);
    text-align: -internal-auto-base(start, initial);
    text-indent: -internal-auto-base(0px, initial);
    -webkit-rtl-ordering: -internal-auto-base(logical, inherit);
    cursor: -internal-auto-base(default, inherit);
    white-space: -internal-auto-base(pre, inherit);
    /* This text-autospace rule won't work because it is set with !important
     * earlier in the UA stylesheet. After merging with the rest of the UA
     * style rules when removing the CustomizableSelect flag, it should start
     * to work. */
    text-autospace: -internal-auto-base(no-autospace !important, inherit);
    color: -internal-auto-base(FieldText, inherit);
    background-color: -internal-auto-base(Field, transparent);
    border: 1px solid -internal-auto-base(light-dark(#767676, #858585), currentColor);
    padding-block: -internal-auto-base(0, 0.25em);
    padding-inline: -internal-auto-base(0, 0.5em);

    /* min-size rules ensure that we meet accessibility guidelines for minimum target size.
     * https://github.com/openui/open-ui/issues/1026
     * https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html */
    /* TODO(crbug.com/1511354): This might be able to be combined with the
     * default select option rules at some point. This should be re-evaluated
     * before StylableSelect is shipped. */
    min-inline-size: -internal-auto-base(auto, calc-size(auto, max(size, 24px)));
    /* The 1lh here makes sure that options with no text still make the button
     * have the same height as options with text. */
    min-block-size: -internal-auto-base(auto, calc-size(auto, max(size, 24px, 1lh)));

    gap: -internal-auto-base(initial, 0.5em);
    border-radius: -internal-auto-base(0, 0.5em);
    align-items: -internal-auto-base(center, unset);
    /* https://github.com/whatwg/html/issues/10876 */
    user-select: -internal-auto-base(auto, none);
  }
}
@supports blink-feature(CustomizableSelectInPage) {
  select {
    font: -internal-auto-base(-webkit-small-control, inherit);
    text-shadow: -internal-auto-base(none, inherit);
    text-transform: -internal-auto-base(none, initial);
    text-rendering: -internal-auto-base(auto, inherit);
    letter-spacing: -internal-auto-base(normal, inherit);
    word-spacing: -internal-auto-base(normal, inherit);
    text-align: -internal-auto-base(start, initial);
    text-indent: -internal-auto-base(0px, initial);
    -webkit-rtl-ordering: -internal-auto-base(logical, inherit);
    cursor: -internal-auto-base(default, inherit);
    white-space: -internal-auto-base(pre, inherit);
    /* See note in CustomizableSelect feature block about text-autospace. */
    text-autospace: -internal-auto-base(no-autospace !important, inherit);
    color: -internal-auto-base(FieldText, inherit);
    background-color: -internal-auto-base(Field, transparent);
    /* See notes about min-inline-size/min-block-size in CustomizableSelect feature block. */
    min-inline-size: -internal-auto-base(auto, calc-size(auto, max(size, 24px)));
    min-block-size: -internal-auto-base(auto, calc-size(auto, max(size, 24px, 1lh)));
    /* https://github.com/whatwg/html/issues/10876 */
    user-select: -internal-auto-base(auto, none);
  }
}

@supports not blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):not([multiple]):not([popover]) {
    display: -internal-auto-base(inline-block, inline-flex);
  }
}
@supports blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):not([popover]) {
    display: -internal-auto-base(inline-block, inline-flex);
  }
}

@supports not blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):not([multiple]) > button:first-child {
    all: unset;
    display: contents;
    interactivity: inert;
  }
}
@supports blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box) > button:first-child {
    all: unset;
    display: contents;
    interactivity: inert;
  }
}

@supports not blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):not([multiple]):enabled:hover {
    background-color: -internal-auto-base(Field, color-mix(in lab, currentColor 10%, transparent));
  }
  select:not(:-internal-list-box):not([multiple]):enabled:active {
    background-color: -internal-auto-base(Field, color-mix(in lab, currentColor 20%, transparent));
  }
  select:not(:-internal-list-box):not([multiple]):disabled {
    opacity: -internal-auto-base(0.7, unset);
    color: -internal-auto-base(light-dark(GrayText, #aaa), color-mix(in srgb, currentColor 50%, transparent));
    border-color: -internal-auto-base(rgba(118, 118, 118, 0.3), inherit);
  }
}
@supports blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):enabled:hover {
    background-color: -internal-auto-base(Field, color-mix(in lab, currentColor 10%, transparent));
  }
  select:not(:-internal-list-box):enabled:active {
    background-color: -internal-auto-base(Field, color-mix(in lab, currentColor 20%, transparent));
  }
  select:not(:-internal-list-box):disabled {
    opacity: -internal-auto-base(0.7, unset);
    color: -internal-auto-base(light-dark(GrayText, #aaa), color-mix(in srgb, currentColor 50%, transparent));
    border-color: -internal-auto-base(rgba(118, 118, 118, 0.3), inherit);
  }
}

/* Undo unwanted styles from select rules */
@supports not blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):not([multiple]) > button:first-child,
  select::picker(select) {
    white-space: normal;
  }
}
@supports blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box) > button:first-child,
  select::picker(select) {
    white-space: normal;
  }
}

@supports not blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box):not([multiple])::picker(select) {
    box-sizing: border-box;
    border: 1px solid;
    padding: 0;
    color: -internal-auto-base(inherit, CanvasText);
    background-color: Canvas;
    margin: 0;
    inset: auto;
    min-inline-size: anchor-size(self-inline);
    /* TODO(crbug.com/409942762): Consider removing -internal-auto-base() here
     * if underlying performance issues with lh units are fixed. */
    min-block-size: -internal-auto-base(0, 1lh);
    /* Go to the edge of the viewport, and add scrollbars if needed. */
    max-block-size: stretch;
    overflow: auto;
    /* Below and span-right, by default. */
    position-area: block-end span-inline-end;
    position-try-order: most-block-size;
    position-try-fallbacks:
        block-start span-inline-end,   /* First try above and span-right. */
        block-end span-inline-start,   /* Then below but span-left. */
        block-start span-inline-start; /* Then above and span-left. */
  }
}
@supports blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box)::picker(select) {
    box-sizing: border-box;
    border: 1px solid -internal-auto-base(light-dark(#767676, #858585), currentColor);
    border-radius: -internal-auto-base(2px, 0);
    padding: 0;
    color: -internal-auto-base(inherit, CanvasText);
    background-color: Canvas;
    margin: 0;
    inset: auto;
    min-inline-size: anchor-size(self-inline);
    /* TODO(crbug.com/409942762): Consider removing -internal-auto-base() here
     * if underlying performance issues with lh units are fixed. */
    min-block-size: -internal-auto-base(0, 1lh);
    /* Go to the edge of the viewport, and add scrollbars if needed. */
    max-block-size: stretch;
    overflow: auto;
    /* Below and span-right, by default. */
    position-area: block-end span-inline-end;
    position-try-order: most-block-size;
    position-try-fallbacks:
      block-start span-inline-end,
      block-end span-inline-start,
      block-start span-inline-start;
  }
}

@supports not blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box):not([multiple]) option {
    /* min-size rules ensure that we meet accessibility guidelines for minimum target size.
     * https://github.com/openui/open-ui/issues/1026
     * https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html */
    /* TODO(crbug.com/1511354): This might be able to be combined with the
     * default select option rules at some point. This should be re-evaluted
     * before CustomizableSelect is shipped. */
    min-inline-size: 24px;
    /* TODO(crbug.com/409942762): Consider removing -internal-auto-base() here
     * if underlying performance issues with lh units are fixed. */
    min-block-size: -internal-auto-base(24px, max(24px, 1lh));
    font-weight: -internal-auto-base(normal, inherit);
    padding-inline: -internal-auto-base(2px, 0.5em);
    padding-block-end: -internal-auto-base(1px, 0);
    display: -internal-auto-base(block, flex);
    align-items: center;
    gap: 0.5em;
  }
}
@supports blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box) option {
    /* min-size rules ensure that we meet accessibility guidelines for minimum target size.
     * https://github.com/openui/open-ui/issues/1026
     * https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html */
    /* TODO(crbug.com/41483940): This might be able to be combined with the
     * default select option rules at some point. This should be re-evaluted
     * before CustomizableSelect is shipped. */
    min-inline-size: 24px;
    /* TODO(crbug.com/409942762): Consider removing -internal-auto-base() here
     * if underlying performance issues with lh units are fixed. */
    min-block-size: -internal-auto-base(24px, max(24px, 1lh));
    font-weight: -internal-auto-base(normal, inherit);
    align-items: center;
    gap: 0.5em;
  }
  select:not(:-internal-list-box):not([multiple]) option {
    padding-inline: -internal-auto-base(2px, 0.5em);
    padding-block-end: -internal-auto-base(1px, 0);
    display: -internal-auto-base(block, flex);
  }
  /* In the multiple case, we want to use the same styles as base appearance
   * because the picker is rendered as a popover. */
  select:not(:-internal-list-box)[multiple] option {
    padding-inline: 0.5em;
    padding-block-end: 0;
    display: flex;
  }
}

@supports not blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box):not([multiple]) option:enabled:hover {
    background-color: color-mix(in lab, currentColor 10%, transparent);
  }
  select:not(:-internal-list-box):not([multiple]) option:enabled:active {
    background-color: color-mix(in lab, currentColor 20%, transparent);
  }
  select:not(:-internal-list-box):not([multiple]) option:disabled {
    color: -internal-auto-base(inherit, color-mix(in lab, currentColor 50%, transparent));
  }
}
@supports blink-feature(SelectMobileDesktopParity) {
  select:not(:-internal-list-box) option:enabled:hover {
    background-color: color-mix(in lab, currentColor 10%, transparent);
  }
  select:not(:-internal-list-box) option:enabled:active {
    background-color: color-mix(in lab, currentColor 20%, transparent);
  }
  select:not(:-internal-list-box) option:disabled {
    color: -internal-auto-base(inherit, color-mix(in lab, currentColor 50%, transparent));
  }
  select:not(:-internal-list-box)[multiple] option:disabled {
  /* This rule applies appearance:base styles to the appearance:auto
   * <select multiple size=1>. Without it, disabled options would not appear disabled. */
    color: color-mix(in lab, currentColor 50%, transparent);
  }
}
@supports blink-feature(CustomizableSelectInPage) {
  /* :-internal-list-box is needed here in order to get precedence over this
   * selector: select:-internal-list-box option:enabled:hover */
  select:-internal-list-box option:enabled:active {
    background-color: color-mix(in lab, currentColor 20%, transparent);
  }
}

@supports not blink-feature(CustomizableSelectInPage) {
  select:not(:-internal-list-box):not([multiple]) option::checkmark {
    content: '\2713';
  }
}
@supports blink-feature(CustomizableSelectInPage) {
  select option::checkmark {
    content: '\2713';
  }
}

@supports blink-feature(SelectMobileDesktopParity) {
  /* The svg data urls in the below ::checkmark rules are built to match the
   * checkbox rendering in NativeThemeBase. */
  select[multiple] option::checkmark {
    /* The svg is 13px by 13px. Without this height rule, the svg would not be
     * vertically centered within the ::checkmark. */
    height: -internal-auto-base(13px, initial);
    content: -internal-auto-base(url(data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2213%22%20height%3D%2213%22%20viewBox%3D%220%200%2013%2013%22%20fill%3D%22none%22%3E%3Crect%20x%3D%220.5%22%20y%3D%220.5%22%20width%3D%2212%22%20height%3D%2212%22%20rx%3D%222%22%20fill%3D%22%23ffffff%22%20stroke%3D%22%23767676%22%20stroke-width%3D%221%22%2F%3E%3C%2Fsvg%3E), '\2713');
  }
  select[multiple] option:checked::checkmark {
    content: -internal-auto-base(url(data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2213%22%20height%3D%2213%22%20viewBox%3D%220%200%2013%2013%22%20fill%3D%22none%22%3E%3Crect%20x%3D%220%22%20y%3D%220%22%20width%3D%2213%22%20height%3D%2213%22%20rx%3D%222%22%20fill%3D%22%230075FF%22%2F%3E%3Cpath%20d%3D%22M2.6%207%20l2.6%202.5%20L10.4%202.6%22%20stroke%3D%22%23ffffff%22%20stroke-width%3D%222%22%2F%3E%3C%2Fsvg%3E), '\2713');
  }
  select[multiple] option:disabled::checkmark {
    content: -internal-auto-base(url(data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2213%22%20height%3D%2213%22%20viewBox%3D%220%200%2013%2013%22%20fill%3D%22none%22%3E%3Crect%20x%3D%220.5%22%20y%3D%220.5%22%20width%3D%2212%22%20height%3D%2212%22%20rx%3D%222%22%20fill%3D%22%23ffffff%22%20stroke%3D%22%23767676%22%20stroke-opacity%3D%2260%25%22%20fill-opacity%3D%2260%25%22%20stroke-width%3D%221%22%2F%3E%3C%2Fsvg%3E), '\2713');
  }
  select[multiple] option:checked:disabled::checkmark {
    content: -internal-auto-base(url(data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2213%22%20height%3D%2213%22%20viewBox%3D%220%200%2013%2013%22%20fill%3D%22none%22%3E%3Crect%20x%3D%220%22%20y%3D%220%22%20width%3D%2213%22%20height%3D%2213%22%20rx%3D%222%22%20fill%3D%22%23767676%22%20fill-opacity%3D%2260%25%22%2F%3E%3Cpath%20d%3D%22M2.6%207%20l2.6%202.5%20L10.4%202.6%22%20stroke%3D%22%23ffffff%22%20stroke-opacity%3D%2260%25%22%20stroke-width%3D%222%22%2F%3E%3C%2Fsvg%3E), '\2713');
  }
}

@supports blink-feature(SelectMobileDesktopParity) {
  select option:not(:checked)::checkmark {
    /* appearance:auto renders an unchecked box instead of empty space. */
    visibility: -internal-auto-base(visible, hidden);
  }
}
@supports not blink-feature(SelectMobileDesktopParity) {
  select option:not(:checked)::checkmark {
    visibility: hidden;
  }
}

select:-internal-autofill-selected,
select::-internal-select-autofill-preview[popover] {
  background-image: none;
  background-color: light-dark(#E8F0FE, rgba(70, 90, 126, 0.4));
  color: FieldText;
}
select::-internal-select-autofill-preview[popover]:popover-open {
  display: grid;
  align-items: center;
  position-area: center;
  height: calc(anchor-size(height) - 2px);
  width: calc(anchor-size(width) - 2px);
  margin: 0;
  padding: 0;
  border: 1px solid black;
}
select::-internal-select-autofill-preview-text {
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  white-space: nowrap;
}

@supports not blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box):not([multiple])::picker-icon {
    content: -internal-auto-base(none, counter(fake-counter-name, disclosure-open));
    /* We don't have to use -internal-auto-base() here because
     * the pseudo-element won't get generated unless the content property is set. */
    display: block;
    margin-inline-start: auto;
  }
}
@supports blink-feature(CustomizableSelectMultiplePopup) {
  select:not(:-internal-list-box)::picker-icon {
    content: -internal-auto-base(none, counter(fake-counter-name, disclosure-open));
    display: block;
    margin-inline-start: auto;
  }
}

@supports blink-feature(CustomizableSelectInPage) {
  select:-internal-list-box::picker-icon {
    display: none !important;
  }
}

@supports not blink-feature(CustomizableSelectInPage) {
  select:not(:-internal-list-box):not([multiple]) optgroup::-internal-optgroup-label {
    padding-inline: -internal-auto-base(2px, 0.5em);
    padding-block: -internal-auto-base(0 1px, 0);
    min-height: -internal-auto-base(1.2em, 0);
  }
  select:not(:-internal-list-box):not([multiple]) optgroup legend {
    padding-inline: -internal-auto-base(2px, 0.5em);
    min-block-size: -internal-auto-base(initial, 1lh);
  }
  select:not(:-internal-list-box):not([multiple]) optgroup option {
    padding-inline-start: -internal-auto-base(20px, 0.5em);
    font-weight: normal;
  }
}
@supports blink-feature(CustomizableSelectInPage) {
  select optgroup::-internal-optgroup-label {
    padding-inline: -internal-auto-base(2px, 0.5em);
    padding-block: -internal-auto-base(0 1px, 0);
    min-height: -internal-auto-base(1.2em, 0);
  }
  select optgroup legend {
    padding-inline: -internal-auto-base(2px, 0.5em);
    min-block-size: -internal-auto-base(initial, 1lh);
  }
  /* This selector is unnecessarily long in order to have higher precedence
   * than the earlier `select:not(:-internal-list-box) option` selector. */
  select:-internal-list-box optgroup option,
  select:not(:-internal-list-box) optgroup option {
    padding-inline-start: -internal-auto-base(20px, 0.5em);
    font-weight: normal;
  }
}
@supports blink-feature(SelectMobileDesktopParity) {
  /* This rule applies appearance:base styles to the appearance:auto
   * <select multiple size=1> optgroups. Without it, the padding would look too
   * small. */
  select:not(:-internal-list-box)[multiple] optgroup::-internal-optgroup-label,
  select:not(:-internal-list-box)[multiple] optgroup legend {
    padding-inline: 0.5em;
    padding-block: 0;
  }
  select:not(:-internal-list-box)[multiple] optgroup option {
    padding-inline-start: -internal-auto-base(1em, 0.5em);
    font-weight: normal;
  }
}

/* These style rules switch whether <option> elements render their label text
 * via ::-internal-option-label-container or all of their children via a
 * <slot> called ::-internal-option-slot. Using the <slot> for rendering is
 * only supported for customizable select when the option does not have a
 * label attribute. In all other cases, just the label text is rendered via
 * ::-internal-option-label-container. */
/* TODO(crbug.com/393500003): Some :-internal-list-box and multiple checks
 * here could be removed if we make -internal-auto-base() work better. */
@supports blink-feature(CustomizableSelectInPage) {
  option::-internal-option-label-container {
    display: -internal-auto-base(contents, none);
  }
  option::-internal-option-slot {
    display: -internal-auto-base(none, contents);
  }
  /* Render the label attribute when it is set. This should be kept in sync
   * with the logic in HTMLOptionElement::DisplayLabel. */
  option[label]:not([label=""])::-internal-option-label-container {
    display: contents;
  }
  option[label]:not([label=""])::-internal-option-slot {
    display: none;
  }
}
@supports not blink-feature(CustomizableSelectInPage) {
  option::-internal-option-label-container {
    display: contents;
  }
  option::-internal-option-slot {
    display: none;
  }
  select:not(:-internal-list-box):not([multiple]) option::-internal-option-label-container {
    display: none;
  }
  select:not(:-internal-list-box):not([multiple]) option::-internal-option-slot {
    display: contents;
  }
  /* Render the label attribute when it is set. This should be kept in sync
   * with the logic in HTMLOptionElement::DisplayLabel. */
  select:not(:-internal-list-box):not([multiple])
  option[label]:not([label=""])::-internal-option-label-container {
    display: contents;
  }
  select:not(:-internal-list-box):not([multiple])
  option[label]:not([label=""])::-internal-option-slot {
    display: none;
  }
}

@supports blink-feature(CustomizableSelectInPage) {
  /* Don't allow nested <optgroup>s. */
  select optgroup optgroup {
    display: none;
  }
}

@supports blink-feature(MenuElements) {
  menubar {
    display: inline-flex;
    flex-direction: row;
    gap: 0.5em;
    width: max-content;
    background-color: transparent;
    border: 1px solid currentColor;
    border-radius: 0.25em;
    padding: 0.25em;
  }

  menulist {
    display: flex;
    flex-direction: column;
    position: absolute;
    position-anchor: auto;
    width: max-content;
    min-width: 150px;
    color: CanvasText;
    background-color: Canvas;
    border: 1px solid currentColor;
    /* TODO(https://crbug.com/406566432): Enable this, or some variation of it,
     * once we figure out why the border radius contributes to subtle pixel
     * differences in reference tests. */
    /*border-radius: 0.25em;*/
    padding: 0.25em;
  }

  menulist:-internal-menulist-popover-with-menubar-anchor {
    /* Below and span-right, by default. */
    position-area: block-end span-inline-end;
  }

  menulist:-internal-menulist-popover-with-menulist-anchor {
    /* To the right, with its top aligned to the implicit anchor's top */
    position-area: inline-end span-block-end;
  }

  menulist > fieldset {
    /* TODO(https://crbug.com/406566432): Consider making this
     * `display: contents`. */
    margin-inline: 0;
    border: none;
    padding-block: 0;
    padding-inline: 0;
  }

  menuitem::checkmark {
    content: '\2713';
  }

  menuitem:not(:checked)::checkmark {
    visibility: hidden;
  }

  /* TODO(https://crbug.com/406566432): Add `menulist > hr` styles for
   * separating items and fieldsets into functional groups. */

  /* We can use the direct child selector for menuitems in menubars, because the
   * menubar content model does not allow for fieldset as an intermediate to
   * group menuitems in menubars. */
  menubar > menuitem {
    display: inline-flex;
  }
  menulist menuitem {
    display: flex;
  }

  menubar, menulist {
    menuitem {
      align-items: center;
      user-select: none;

      /* The min-*-size rules below were inspired by the same rules for
       * customizable select, and mostly cater to WCAG accessibility guidelines
       * of making controls a minimum of 24x24px. See:
       * https://github.com/openui/open-ui/issues/1026
       * https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html */
      min-inline-size: 24px;
      min-block-size: max(24px, 1lh);

      font-weight: inherit;
      padding: 1em;
    }

    menuitem:enabled:hover {
      background-color: color-mix(in lab, currentColor 10%, transparent);
    }
    menuitem:disabled {
      color: color-mix(in lab, currentColor 50%, transparent);
    }
  }
}

[overscrollcontainer] {
  -internal-overscroll-area: auto;
}

:-internal-overscroll-target {
  -internal-overscroll-position: auto;
}