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Twenty Thirteen: Remove code and checks for obsolete browsers.
Remove IE specific code from Twenty Thirteen. Remove custom IE stylesheet contents, the HTML5 shiv contents (also targeting Safari 4.x and Firefox 3.x), and IE-specific code. Props desrosj, sabernhardt, neychok, joedolson. See #58836. git-svn-id: https://develop.svn.wordpress.org/trunk@60962 602fd350-edb4-49c9-b593-d223f7449a82
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‎src/wp-content/themes/twentythirteen/css/ie.css‎

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/*
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Styles for older IE versions (previous to IE9).
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*/
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.genericon:before:hover,
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.menu-toggle:after:hover,
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.date a:before:hover,
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.entry-meta .author a:before:hover,
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.format-audio .entry-content:before:hover,
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.comments-link a:before:hover,
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.tags-links a:first-child:before:hover,
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.categories-links a:first-child:before:hover,
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.edit-link > a:before:hover,
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.attachment-meta:before:hover,
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.attachment-meta a:before:hover,
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.comment-awaiting-moderation:before:hover,
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.comment-reply-link:before:hover,
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.comment-reply-title small a:before:hover,
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.bypostauthor > .comment-body .fn:before:hover {
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text-decoration: none;
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}
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.nav-menu .sub-menu ul,
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.nav-menu .children ul {
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left: 100%;
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}
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.site-header .home-link {
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max-width: 1040px;
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}
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.site-header .search-form [type="search"],
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.site-header .search-form [type="text"] {
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padding-top: 6px;
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}
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img.alignright {
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margin-right: 0;
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}
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img.alignleft {
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margin-left: 0;
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}
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.site-main .sidebar-inner {
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width: 1040px;
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}
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.site-main .widget-area {
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margin-right: 60px;
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}
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.format-image .entry-content .size-full {
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margin: 0;
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max-width: 604px;
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}
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.gallery-columns-1 .gallery-item,
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.gallery-columns-2 .gallery-item,
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.gallery-columns-3 .gallery-item {
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max-width: none;
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}
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.gallery img {
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width: auto;
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}
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.gallery-caption {
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background: #000;
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filter: alpha(opacity=0);
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}
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.gallery-item:hover .gallery-caption {
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filter: alpha(opacity=70);
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}
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.comment {
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clear: both;
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}
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.comment-meta,
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.comment-content,
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.comment-list .reply {
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width: 480px;
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}
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.depth-2 .comment-meta,
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.depth-2 .comment-content,
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.comment-list .depth-2 .reply {
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width: 460px;
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}
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.depth-3 .comment-meta,
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.depth-3 .comment-content,
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.comment-list .depth-3 .reply {
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width: 440px;
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}
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.depth-4 .comment-meta,
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.depth-4 .comment-content,
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.comment-list .depth-4 .reply {
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width: 420px;
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}
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.depth-5 .comment-meta,
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.depth-5 .comment-content,
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.comment-list .depth-5 .reply {
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width: 400px;
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}
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.comment-meta {
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margin-bottom: 0;
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}
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.widget {
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background: #f7f5e7;
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}
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.site-footer .widget {
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background: none;
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}
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/* Internet Explorer 8 */
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.ie8 .site {
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border: 0;
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}
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.ie8 img.size-full,
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.ie8 img.size-large {
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height: auto;
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width: auto;
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}
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.ie8 .sidebar .entry-header,
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.ie8 .sidebar .entry-content,
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.ie8 .sidebar .entry-summary,
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.ie8 .sidebar .entry-meta {
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max-width: 724px;
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}
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.ie8 .author-info {
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margin-left: 0;
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}
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.ie8 .paging-navigation .nav-previous .meta-nav {
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padding: 5px 0 8px;
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width: 40px;
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}
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.ie8 .paging-navigation .nav-next {
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line-height: 1;
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}
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.ie8 .format-status .entry-content:before,
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.ie8 .format-status .entry-meta:before {
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content: none;
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}
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.ie8 .site-main .widget-area {
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margin-right: 0;
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}
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/* Internet Explorer 7 */
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.ie7 audio,
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.ie7 canvas,
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.ie7 video {
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display: inline;
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zoom: 1;
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}
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.ie7 legend {
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margin-left: -7px;
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}
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.ie7 button,
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.ie7 input,
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.ie7 select,
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.ie7 textarea {
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vertical-align: middle;
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}
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.ie7 button,
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.ie7 input[type="button"],
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.ie7 input[type="reset"],
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.ie7 input[type="submit"] {
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overflow: visible;
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}
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.ie7 input[type="checkbox"],
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.ie7 input[type="radio"] {
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height: 13px;
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width: 13px;
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}
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.ie7 .screen-reader-text {
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clip: rect(1px 1px 1px 1px);
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}
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.ie7 .site-header {
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position: relative;
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z-index: 1;
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}
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.ie7 .main-navigation {
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max-width: 930px;
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padding-right: 150px;
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}
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.ie7 .nav-menu li a,
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.ie7 .nav-menu li {
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display: block;
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float: left;
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}
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.ie7 .nav-menu ul {
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top: 40px;
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}
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.ie7 .nav-menu .sub-menu,
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.ie7 .nav-menu .children {
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display: none;
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overflow: visible;
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}
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.ie7 ul.nav-menu li:hover > ul,
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.ie7 .nav-menu ul li:hover > ul {
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display: block;
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}
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.ie7 .site-header .search-form [type="search"],
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.ie7 .site-header .search-form [type="text"] {
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background-color: #fff;
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border: 2px solid #c3c0ab;
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cursor: text;
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height: 28px;
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outline: 0;
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width: 150px;
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}
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.ie7 .entry-header,
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.ie7 .entry-content,
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.ie7 .entry-summary,
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.ie7 .entry-meta {
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width: 604px;
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}
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.ie7 .format-status .entry-content,
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.ie7 .format-status .entry-meta {
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padding-left: 60px;
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}
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.ie7 .sidebar .format-status .entry-content,
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.ie7 .sidebar .format-status .entry-meta {
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padding-left: 60px;
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}
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.ie7 .sidebar .post-navigation .nav-links,
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.ie7 .sidebar .paging-navigation .nav-links {
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width: 604px;
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}
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.ie7 .paging-navigation .meta-nav {
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padding: 0 0 10px;
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vertical-align: middle;
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width: 40px;
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}
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.ie7 .comments-title,
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.ie7 .comment-list,
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.ie7 .comment-reply-title,
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.ie7 .comment-respond .comment-form {
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width: 604px;
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}
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.ie7 .site-footer .widget-area {
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max-width: none;
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left: auto;
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}
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/* RTL for Internet Explorer 7 & 8 */
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.rtl .format-audio .entry-content:before,
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.rtl .comment-reply-link:before,
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.rtl .comment-reply-login:before {
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-ms-filter: "FlipH";
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filter: FlipH;
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}
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/* This theme does not support Internet Explorer since version 4.5. */

‎src/wp-content/themes/twentythirteen/functions.php‎

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wp_enqueue_style( 'twentythirteen-block-style', get_template_directory_uri() . '/css/blocks.css', array( 'twentythirteen-style' ), '20240520' );
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// Registers the Internet Explorer specific stylesheet.
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wp_register_style( 'twentythirteen-ie', get_template_directory_uri() . '/css/ie.css', array( 'twentythirteen-style' ), '20150214' );
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wp_style_add_data( 'twentythirteen-ie', 'conditional', 'lt IE 9' );
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wp_register_style( 'twentythirteen-ie', false, array( 'twentythirteen-style' ) );
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}
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add_action( 'wp_enqueue_scripts', 'twentythirteen_scripts_styles' );
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‎src/wp-content/themes/twentythirteen/js/html5.js‎

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/*
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HTML5 Shiv v3.7.0 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
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*/
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(function(l,f){function m(){var a=e.elements;return"string"==typeof a?a.split(" "):a}function i(a){var b=n[a[o]];b||(b={},h++,a[o]=h,n[h]=b);return b}function p(a,b,c){b||(b=f);if(g)return b.createElement(a);c||(c=i(b));b=c.cache[a]?c.cache[a].cloneNode():r.test(a)?(c.cache[a]=c.createElem(a)).cloneNode():c.createElem(a);return b.canHaveChildren&&!s.test(a)?c.frag.appendChild(b):b}function t(a,b){if(!b.cache)b.cache={},b.createElem=a.createElement,b.createFrag=a.createDocumentFragment,b.frag=b.createFrag();
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a.createElement=function(c){return!e.shivMethods?b.createElem(c):p(c,a,b)};a.createDocumentFragment=Function("h,f","return function(){var n=f.cloneNode(),c=n.createElement;h.shivMethods&&("+m().join().replace(/[\w\-]+/g,function(a){b.createElem(a);b.frag.createElement(a);return'c("'+a+'")'})+");return n}")(e,b.frag)}function q(a){a||(a=f);var b=i(a);if(e.shivCSS&&!j&&!b.hasCSS){var c,d=a;c=d.createElement("p");d=d.getElementsByTagName("head")[0]||d.documentElement;c.innerHTML="x<style>article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}mark{background:#FF0;color:#000}template{display:none}</style>";
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c=d.insertBefore(c.lastChild,d.firstChild);b.hasCSS=!!c}g||t(a,b);return a}var k=l.html5||{},s=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i,r=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i,j,o="_html5shiv",h=0,n={},g;(function(){try{var a=f.createElement("a");a.innerHTML="<xyz></xyz>";j="hidden"in a;var b;if(!(b=1==a.childNodes.length)){f.createElement("a");var c=f.createDocumentFragment();b="undefined"==typeof c.cloneNode||
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"undefined"==typeof c.createDocumentFragment||"undefined"==typeof c.createElement}g=b}catch(d){g=j=!0}})();var e={elements:k.elements||"abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output progress section summary template time video",version:"3.7.0",shivCSS:!1!==k.shivCSS,supportsUnknownElements:g,shivMethods:!1!==k.shivMethods,type:"default",shivDocument:q,createElement:p,createDocumentFragment:function(a,b){a||(a=f);
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if(g)return a.createDocumentFragment();for(var b=b||i(a),c=b.frag.cloneNode(),d=0,e=m(),h=e.length;d<h;d++)c.createElement(e[d]);return c}};l.html5=e;q(f)})(this,document);
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// This theme does not support Internet Explorer since version 4.5.

‎src/wp-content/themes/twentythirteen/readme.txt‎

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Twenty Thirteen Theme bundles the following third-party resources:
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HTML5 Shiv v3.7.0, Copyright 2014 Alexander Farkas
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Licenses: MIT/GPL2
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Source: https://github.com/aFarkas/html5shiv
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Genericons icon font, Copyright 2013-2017 Automattic Inc.
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License: GNU GPL, Version 2 (or later)
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Source: http://www.genericons.com

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