Webkit のデフォルトスタイルシートです。WebkitはsafariやGoogle Chromeで使用されています。Google Chromeは変更が行われている可能性があります。
下記はWebkit (r56629) のデフォルトスタイルシートの内容です。
/* * The default style sheet used to render HTML. * * Copyright (C) 2000 Lars Knoll (knoll@kde.org) * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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 } /* children of the <head> element all have display:none */ head { display: none } meta { display: none } title { display: none } link { display: none } style { display: none } script { display: none } /* generic block-level elements */ body { display: block; margin: 8px } p { display: block; margin: 1.0__qem 0px } div { display: block } layer { display: block } article, aside, footer, header, hgroup, nav, section { display: block } marquee { display: inline-block; overflow: -webkit-marquee } address { display: block } blockquote { display: block; margin: 1__qem 40px 1em 40px } q { display: inline } q:before { content: '"' /* FIXME: content: open-quote; */ } q:after { content: '"' /* FIXME: content: close-quote; */ } center { display: block; /* special centering to be able to emulate the html4/netscape behaviour */ text-align: -webkit-center } hr { display: block; margin: 0.5em auto; border-style: inset; border-width: 1px } map { display: inline } /* heading elements */ h1 { display: block; font-size: 2em; margin: .67__qem 0 .67em 0; font-weight: bold } h2 { display: block; font-size: 1.5em; margin: .83__qem 0 .83em 0; font-weight: bold } h3 { display: block; font-size: 1.17em; margin: 1__qem 0 1em 0; font-weight: bold } h4 { display: block; margin: 1.33__qem 0 1.33em 0; font-weight: bold } h5 { display: block; font-size: .83em; margin: 1.67__qem 0 1.67em 0; font-weight: bold } h6 { display: block; font-size: .67em; margin: 2.33__qem 0 2.33em 0; font-weight: bold } /* tables */ table { display: table; border-collapse: separate; border-spacing: 2px; border-color: gray } 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 } th { font-weight: bold } caption { display: table-caption; text-align: -webkit-center } /* lists */ ul, menu, dir { display: block; list-style-type: disc; margin: 1__qem 0 1em 0; -webkit-padding-start: 40px } ol { display: block; list-style-type: decimal; margin: 1__qem 0 1em 0; -webkit-padding-start: 40px } li { display: list-item } ul ul, ol ul { list-style-type: circle } ol ol ul, ol ul ul, ul ol ul, ul ul ul { list-style-type: square } dd { display: block; -webkit-margin-start: 40px } dl { display: block; margin: 1__qem 0 1em 0 } dt { display: block } ol ul, ul ol, ul ul, ol ol { margin-top: 0; margin-bottom: 0 } /* form elements */ form { display: block; margin-top: 0__qem } label { cursor: default; } legend { display: block; padding-left: 2px; padding-right: 2px; border: none } fieldset { display: block; margin-left: 2px; margin-right: 2px; padding: 0.35em 0.75em 0.625em; border: 2px groove ThreeDFace } button { -webkit-appearance: button; } input, textarea, keygen, select, button, isindex, datagrid { margin: 0__qem; font: -webkit-small-control; color: initial; letter-spacing: normal; word-spacing: normal; line-height: normal; text-transform: none; text-indent: 0; text-shadow: none; display: inline-block; text-align: -webkit-auto; } input[type="hidden"] { display: none } input, input[type="password"], input[type="search"], isindex { -webkit-appearance: textfield; padding: 1px; background-color: white; border: 2px inset; -webkit-rtl-ordering: logical; -webkit-user-select: text; cursor: auto; } input[type="search"] { -webkit-appearance: searchfield; -webkit-box-sizing: border-box; } input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: searchfield-cancel-button; display: inline-block; } input[type="search"]::-webkit-search-decoration { -webkit-appearance: searchfield-decoration; display: inline-block; } input[type="search"]::-webkit-search-results-decoration { -webkit-appearance: searchfield-results-decoration; display: inline-block; } input[type="search"]::-webkit-search-results-button { -webkit-appearance: searchfield-results-button; display: inline-block; } input::-webkit-input-list-button { -webkit-appearance: list-button; display: inline-block; } input::-webkit-inner-spin-button { -webkit-appearance: inner-spin-button; display: inline-block; } input::-webkit-outer-spin-button { -webkit-appearance: outer-spin-button; display: inline-block; margin-left: 2px; } textarea { -webkit-appearance: textarea; background-color: white; border: 1px solid; -webkit-rtl-ordering: logical; -webkit-user-select: text; -webkit-box-orient: vertical; resize: auto; cursor: auto; padding: 2px; white-space: pre-wrap; word-wrap: break-word; } input::-webkit-input-placeholder, isindex::-webkit-input-placeholder, textarea::-webkit-input-placeholder { color: darkGray; } input[type="password"] { -webkit-text-security: disc !important; } input[type="hidden"], input[type="image"], input[type="file"] { -webkit-appearance: initial; padding: initial; background-color: initial; border: initial; } input[type="file"] { -webkit-box-align: baseline; text-align: start !important; } input:-webkit-autofill { background-color: #FAFFBD !important; background-image:none !important; } input[type="radio"], input[type="checkbox"] { margin: 3px 0.5ex; padding: initial; background-color: initial; border: initial; } input[type="button"], input[type="submit"], input[type="reset"], input[type="file"]::-webkit-file-upload-button { -webkit-appearance: push-button; white-space: pre } input[type="button"], input[type="submit"], input[type="reset"], input[type="file"]::-webkit-file-upload-button, button { -webkit-box-align: center; text-align: center; cursor: default; color: ButtonText; padding: 2px 6px 3px 6px; border: 2px outset ButtonFace; background-color: ButtonFace; -webkit-box-sizing: border-box } input[type="range"] { -webkit-appearance: slider-horizontal; padding: initial; border: initial; margin: 2px; } input[type="range"]::-webkit-slider-thumb { -webkit-appearance: sliderthumb-horizontal; } input[type="button"]:disabled, input[type="submit"]:disabled, input[type="reset"]:disabled, input[type="file"]:disabled::-webkit-file-upload-button, button:disabled, select:disabled, keygen:disabled, optgroup:disabled, option:disabled, datagrid:disabled { color: GrayText } input[type="button"]:active, input[type="submit"]:active, input[type="reset"]:active, input[type="file"]:active::-webkit-file-upload-button, button:active { border-style: inset } input[type="button"]:active:disabled, input[type="submit"]:active:disabled, input[type="reset"]:active:disabled, input[type="file"]:active:disabled::-webkit-file-upload-button, button:active:disabled { border-style: outset } area, param { display: none } input[type="checkbox"] { -webkit-appearance: checkbox; -webkit-box-sizing: border-box; } input[type="radio"] { -webkit-appearance: radio; -webkit-box-sizing: border-box; } keygen, select { -webkit-appearance: menulist; -webkit-box-sizing: border-box; -webkit-box-align: center; border: 1px solid; -webkit-border-radius: 5px; white-space: pre; -webkit-rtl-ordering: logical; color: black; background-color: white; cursor: default; } select[size], select[multiple], select[size][multiple] { -webkit-appearance: listbox; -webkit-box-align: start; border: 1px inset gray; -webkit-border-radius: initial; white-space: initial; } select[size="0"], select[size="1"] { -webkit-appearance: menulist; -webkit-box-align: center; border: 1px solid; -webkit-border-radius: 5px; white-space: pre; } datalist { display: none; } optgroup { font-weight: bolder; } option { font-weight: normal; } /* progress */ progress { -webkit-appearance: progress-bar; display: inline-block; height: 1em; width: 10em; vertical-align: -0.2em; } progress::-webkit-progress-bar { -webkit-appearance: progress-bar; } /* datagrid */ datagrid { height: 150px; /* We don't use width:300px in CSS, since we want width:intrinsic and width:min-intrinsic to reset to 300 properly. */ -webkit-appearance: datagrid; -webkit-box-sizing: border-box; -webkit-rtl-ordering: logical; color: black; background-color: white; cursor: default; border: 1px inset gray; white-space: initial; } /* inline elements */ u, ins { text-decoration: underline } strong, b { font-weight: bolder } i, cite, em, var, address { font-style: italic } tt, code, kbd, samp { font-family: monospace } pre, xmp, plaintext, listing { display: block; font-family: monospace; white-space: pre; margin: 1__qem 0 } 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 */ :focus { outline: auto 5px -webkit-focus-ring-color } /* Read-only text fields do not show a focus ring but do still receive focus */ html:focus, body:focus, input[readonly]:focus { outline: none } input:focus, textarea:focus, isindex:focus, keygen:focus, select:focus { outline-offset: -2px } input[type="button"]:focus, input[type="checkbox"]:focus, input[type="file"]:focus, input[type="hidden"]:focus, input[type="image"]:focus, input[type="radio"]:focus, input[type="reset"]:focus, input[type="search"]:focus, input[type="submit"]:focus, input[type="file"]:focus::-webkit-file-upload-button { outline-offset: 0 } a:-webkit-any-link { color: -webkit-link; text-decoration: underline; cursor: auto; } a:-webkit-any-link:active { color: -webkit-activelink } /* HTML5 ruby elements */ ruby, rt { text-indent: 0; /* blocks used for ruby rendering should not trigger this */ line-height: normal; } ruby > rt { display: block; font-size: 60%; /* make slightly larger than 50% for better readability */ text-align: center; } ruby > rp { display: none; } /* other elements */ noframes { display: none } frameset, frame { display: block } frameset { border-color: inherit } iframe { border: 2px inset } /* noscript is handled internally, as it depends on settings */
この情報は下記のページの情報を元にしています。
http://www.iecss.com/