merge PR #4131

resolves #4140 remove duplicate selectors and redundant styles from default stylesheet

4 files changed, 155 insertions, 263 deletions

diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 9f37b484..25b7372f 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -30,6 +30,7 @@ Improvements::
 
   * Prevent line numbers on source blocks in HTML output from being selected (applies to pygments, rouge, and coderay) (#4128)
   * Layout lines of a source block with table-based line numbering as rows in the table when using Rouge as source highlighter (#4130)
+  * Remove duplicate selectors in default stylesheet; enable stylelint rule to check for them
 
 // tag::compact[]
 == 2.0.16 (2021-08-03) - @mojavelinux
diff --git a/data/stylesheets/asciidoctor-default.css b/data/stylesheets/asciidoctor-default.css
index f419d383..ad30f14c 100644
--- a/data/stylesheets/asciidoctor-default.css
+++ b/data/stylesheets/asciidoctor-default.css
@@ -1,25 +1,34 @@
 /*! Asciidoctor default stylesheet | MIT License | https://asciidoctor.org */
 /* Uncomment the following line when using as a custom stylesheet */
 /* @import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"; */
-html{font-family:sans-serif;-webkit-text-size-adjust:100%}
-a{background:none}
+*,::before,::after{box-sizing:border-box}
+html{font-size:100%;-webkit-text-size-adjust:100%}
+body{background:#fff;color:rgba(0,0,0,.8);padding:0;margin:0;font-family:"Noto Serif","DejaVu Serif",serif;font-size:inherit;line-height:1;position:relative;cursor:auto;-moz-tab-size:4;-o-tab-size:4;tab-size:4;word-wrap:anywhere;-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased}
+dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,p,blockquote,th,td{margin:0;padding:0}
+a{background:none;color:#2156a5;text-decoration:underline;line-height:inherit}
+a:active,a:hover{cursor:pointer;outline:0}
 a:focus{outline:thin dotted}
-a:active,a:hover{outline:0}
-h1{font-size:2em;margin:.67em 0}
-b,strong{font-weight:bold}
+a:hover,a:focus{color:#1d4b8f}
 abbr{font-size:.9em}
 abbr[title]{cursor:help;border-bottom:1px dotted #dddddf;text-decoration:none}
+b,strong{font-weight:bold;line-height:inherit}
+strong strong{font-weight:400}
+code,kbd,pre,samp{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;font-size:1em}
+code{font-weight:400;color:rgba(0,0,0,.9)}
+pre{color:rgba(0,0,0,.9);line-height:1.45;text-rendering:optimizeSpeed;white-space:pre-wrap}
 dfn{font-style:italic}
-hr{height:0}
+em,i{font-style:italic;line-height:inherit}
+em em{font-style:normal}
+hr{border:solid #dddddf;border-width:1px 0 0;clear:both;height:0;margin:1.25em 0 1.1875em}
 mark{background:#ff0;color:#000}
-code,kbd,pre,samp{font-family:monospace;font-size:1em}
-pre{white-space:pre-wrap}
+p{line-height:1.6;margin-bottom:1.25rem;text-rendering:optimizeLegibility}
 q{quotes:"\201C" "\201D" "\2018" "\2019"}
-small{font-size:80%}
+small{font-size:60%;line-height:inherit}
 sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
 sup{top:-.5em}
 sub{bottom:-.25em}
-img{border:0}
+img{border:0;-ms-interpolation-mode:bicubic}
+img,object,svg{display:inline-block;vertical-align:middle}
 svg:not(:root){overflow:hidden}
 figure{margin:0}
 audio,video{display:inline-block}
@@ -33,15 +42,9 @@ button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appe
 button[disabled],html input[disabled]{cursor:default}
 input[type=checkbox],input[type=radio]{padding:0}
 button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}
-textarea{overflow:auto;vertical-align:top}
-table{border-collapse:collapse;border-spacing:0}
-*,::before,::after{box-sizing:border-box}
-html,body{font-size:100%}
-body{background:#fff;color:rgba(0,0,0,.8);padding:0;margin:0;font-family:"Noto Serif","DejaVu Serif",serif;line-height:1;position:relative;cursor:auto;-moz-tab-size:4;-o-tab-size:4;tab-size:4;word-wrap:anywhere;-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased}
-a:hover{cursor:pointer}
+textarea{overflow:auto}
 img,object,embed{max-width:100%;height:auto}
 object,embed{height:100%}
-img{-ms-interpolation-mode:bicubic}
 .left{float:left!important}
 .right{float:right!important}
 .text-left{text-align:left!important}
@@ -49,28 +52,16 @@ img{-ms-interpolation-mode:bicubic}
 .text-center{text-align:center!important}
 .text-justify{text-align:justify!important}
 .hide{display:none}
-img,object,svg{display:inline-block;vertical-align:middle}
-textarea{height:auto;min-height:50px}
 select{width:100%}
 .subheader,.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{line-height:1.45;color:#7a2518;font-weight:400;margin-top:0;margin-bottom:.25em}
-div,dl,dt,dd,ul,ol,li,h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6,pre,form,p,blockquote,th,td{margin:0;padding:0}
-a{color:#2156a5;text-decoration:underline;line-height:inherit}
-a:hover,a:focus{color:#1d4b8f}
-a img{border:0}
-p{line-height:1.6;margin-bottom:1.25em;text-rendering:optimizeLegibility}
 p aside{font-size:.875em;line-height:1.35;font-style:italic}
-h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{font-family:"Open Sans","DejaVu Sans",sans-serif;font-weight:300;font-style:normal;color:#ba3925;text-rendering:optimizeLegibility;margin-top:1em;margin-bottom:.5em;line-height:1.0125em}
-h1 small,h2 small,h3 small,#toctitle small,.sidebarblock>.content>.title small,h4 small,h5 small,h6 small{font-size:60%;color:#e99b8f;line-height:0}
+h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{font-family:"Open Sans","DejaVu Sans",sans-serif;font-weight:300;font-style:normal;color:#ba3925;text-rendering:optimizeLegibility;margin-top:1em;margin-bottom:.5em;line-height:1.2;word-spacing:-.05em}
+h1 small,h2 small,h3 small,#toctitle small,.sidebarblock>.content>.title small,h4 small,h5 small,h6 small{color:#e99b8f;line-height:0}
 h1{font-size:2.125em}
 h2{font-size:1.6875em}
 h3,#toctitle,.sidebarblock>.content>.title{font-size:1.375em}
 h4,h5{font-size:1.125em}
 h6{font-size:1em}
-hr{border:solid #dddddf;border-width:1px 0 0;clear:both;margin:1.25em 0 1.1875em}
-em,i{font-style:italic;line-height:inherit}
-strong,b{font-weight:bold;line-height:inherit}
-small{font-size:60%;line-height:inherit}
-code{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;font-weight:400;color:rgba(0,0,0,.9)}
 ul,ol,dl{line-height:1.6;margin-bottom:1.25em;list-style-position:outside;font-family:inherit}
 ul,ol{margin-left:1.5em}
 ul li ul,ul li ol{margin-left:1.25em;margin-bottom:0}
@@ -80,38 +71,33 @@ ul.circle{list-style-type:circle}
 ul.disc{list-style-type:disc}
 ol li ul,ol li ol{margin-left:1.25em;margin-bottom:0}
 dl dt{margin-bottom:.3125em;font-weight:bold}
-dl dd{margin-bottom:1.25em}
+dl dd{margin-bottom:1.25em;margin-left:1.125em}
 blockquote{margin:0 0 1.25em;padding:.5625em 1.25em 0 1.1875em;border-left:1px solid #ddd}
 blockquote,blockquote p{line-height:1.6;color:rgba(0,0,0,.85)}
-@media screen and (min-width:768px){h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2}
-h1{font-size:2.75em}
+@media screen and (min-width:768px){h1{font-size:2.75em}
 h2{font-size:2.3125em}
 h3,#toctitle,.sidebarblock>.content>.title{font-size:1.6875em}
 h4{font-size:1.4375em}}
-table{background:#fff;margin-bottom:1.25em;border:1px solid #dedede;word-wrap:normal}
+table{background:#fff;border:1px solid #dedede;border-collapse:collapse;border-spacing:0;margin-bottom:1.25em;word-wrap:normal}
 table thead,table tfoot{background:#f7f8f7}
 table thead tr th,table thead tr td,table tfoot tr th,table tfoot tr td{padding:.5em .625em .625em;font-size:inherit;color:rgba(0,0,0,.8);text-align:left}
 table tr th,table tr td{padding:.5625em .625em;font-size:inherit;color:rgba(0,0,0,.8)}
 table tr.even,table tr.alt{background:#f8f8f7}
 table thead tr th,table tfoot tr th,table tbody tr td,table tr td,table tfoot tr td{line-height:1.6}
-h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2;word-spacing:-.05em}
 h1 strong,h2 strong,h3 strong,#toctitle strong,.sidebarblock>.content>.title strong,h4 strong,h5 strong,h6 strong{font-weight:400}
 .center{margin-left:auto;margin-right:auto}
 .stretch{width:100%}
-.clearfix::before,.clearfix::after,.float-group::before,.float-group::after{content:" ";display:table}
+.clearfix::before,.clearfix::after,.float-group::before,.float-group::after{content:"";display:table}
 .clearfix::after,.float-group::after{clear:both}
 :not(pre).nobreak{word-wrap:normal}
 :not(pre).nowrap{white-space:nowrap}
 :not(pre).pre-wrap{white-space:pre-wrap}
 :not(pre):not([class^=L])>code{font-size:.9375em;font-style:normal!important;letter-spacing:0;padding:.1em .5ex;word-spacing:-.15em;background:#f7f7f8;border-radius:4px;line-height:1.45;text-rendering:optimizeSpeed}
-pre{color:rgba(0,0,0,.9);font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;line-height:1.45;text-rendering:optimizeSpeed}
 pre code,pre pre{color:inherit;font-size:inherit;line-height:inherit}
 pre>code{display:block}
 pre.nowrap,pre.nowrap pre{white-space:pre;word-wrap:normal}
-em em{font-style:normal}
-strong strong{font-weight:400}
 .keyseq{color:rgba(51,51,51,.8)}
-kbd{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;display:inline-block;color:rgba(0,0,0,.8);font-size:.65em;line-height:1.45;background:#f7f7f7;border:1px solid #ccc;border-radius:3px;box-shadow:0 1px 0 rgba(0,0,0,.2),inset 0 0 0 .1em #fff;margin:0 .15em;padding:.2em .5em;vertical-align:middle;position:relative;top:-.1em;white-space:nowrap}
+kbd{display:inline-block;color:rgba(0,0,0,.8);font-size:.65em;line-height:1.45;background:#f7f7f7;border:1px solid #ccc;border-radius:3px;box-shadow:0 1px 0 rgba(0,0,0,.2),inset 0 0 0 .1em #fff;margin:0 .15em;padding:.2em .5em;vertical-align:middle;position:relative;top:-.1em;white-space:nowrap}
 .keyseq kbd:first-child{margin-left:0}
 .keyseq kbd:last-child{margin-right:0}
 .menuseq,.menuref{color:#000}
@@ -124,9 +110,9 @@ b.button::before{content:"[";padding:0 3px 0 2px}
 b.button::after{content:"]";padding:0 2px 0 3px}
 p a>code:hover{color:rgba(0,0,0,.9)}
 #header,#content,#footnotes,#footer{width:100%;margin:0 auto;max-width:62.5em;*zoom:1;position:relative;padding-left:.9375em;padding-right:.9375em}
-#header::before,#header::after,#content::before,#content::after,#footnotes::before,#footnotes::after,#footer::before,#footer::after{content:" ";display:table}
+#header::before,#header::after,#content::before,#content::after,#footnotes::before,#footnotes::after,#footer::before,#footer::after{content:"";display:table}
 #header::after,#content::after,#footnotes::after,#footer::after{clear:both}
-#content{margin-top:1.25em}
+#content{margin-top:1.25em;margin-bottom:.625em}
 #content::before{content:none}
 #header>h1:first-child{color:rgba(0,0,0,.85);margin-top:2.25rem;margin-bottom:0}
 #header>h1:first-child+#toc{margin-top:8px;border-top:1px solid #dddddf}
@@ -170,7 +156,6 @@ body.toc2.toc-right{padding-left:0;padding-right:20em}}
 #content #toc>:last-child{margin-bottom:0}
 #footer{max-width:none;background:rgba(0,0,0,.8);padding:1.25em}
 #footer-text{color:hsla(0,0%,100%,.8);line-height:1.44}
-#content{margin-bottom:.625em}
 .sect1{padding-bottom:.625em}
 @media screen and (min-width:768px){#content{margin-bottom:1.25em}
 .sect1{padding-bottom:1.25em}}
@@ -196,7 +181,7 @@ table.tableblock.fit-content>caption.title{white-space:nowrap;width:0}
 .admonitionblock>table td.icon .title{font-weight:bold;font-family:"Open Sans","DejaVu Sans",sans-serif;text-transform:uppercase}
 .admonitionblock>table td.content{padding-left:1.125em;padding-right:1.25em;border-left:1px solid #dddddf;color:rgba(0,0,0,.6);word-wrap:anywhere}
 .admonitionblock>table td.content>:last-child>:last-child{margin-bottom:0}
-.exampleblock>.content{border:1px solid #e6e6e6;margin-bottom:1.25em;padding:1.25em;background:#fff;border-radius:4px}
+.exampleblock>.content{border:1px solid #e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#fffef7;border-radius:4px;box-shadow:0 1px 4px #e0e0dc}
 .exampleblock>.content>:first-child{margin-top:0}
 .exampleblock>.content>:last-child{margin-bottom:0}
 .sidebarblock{border:1px solid #dbdbd6;margin-bottom:1.25em;padding:1.25em;background:#f3f3f2;border-radius:4px}
@@ -277,7 +262,6 @@ p.tableblock>code:only-child{background:none;padding:0}
 p.tableblock{font-size:1em}
 ol{margin-left:1.75em}
 ul li ol{margin-left:1.5em}
-dl dd{margin-left:1.125em}
 dl dd:last-child,dl dd:last-child>:last-child{margin-bottom:0}
 ol>li p,ul>li p,ul dd,ol dd,.olist .olist,.ulist .ulist,.ulist .olist,.olist .ulist{margin-bottom:.625em}
 ul.checklist,ul.none,ol.none,ul.no-bullet,ol.no-bullet,ol.unnumbered,ul.unstyled,ol.unstyled{list-style-type:none}
@@ -384,9 +368,7 @@ dt,th.tableblock,td.content,div.footnote{text-rendering:optimizeLegibility}
 h1,h2,p,td.content,span.alt,summary{letter-spacing:-.01em}
 p strong,td.content strong,div.footnote strong{letter-spacing:-.005em}
 p,blockquote,dt,td.content,span.alt,summary{font-size:1.0625rem}
-p{margin-bottom:1.25rem}
 .sidebarblock p,.sidebarblock dt,.sidebarblock td.content,p.tableblock{font-size:1em}
-.exampleblock>.content{background:#fffef7;border-color:#e0e0dc;box-shadow:0 1px 4px #e0e0dc}
 .print-only{display:none!important}
 @page{margin:1.25cm .75cm}
 @media print{*{box-shadow:none!important;text-shadow:none!important}
diff --git a/src/stylesheets/.stylelintrc b/src/stylesheets/.stylelintrc
index 437cd1cc..344318f3 100644
--- a/src/stylesheets/.stylelintrc
+++ b/src/stylesheets/.stylelintrc
@@ -3,6 +3,5 @@
   "rules": {
     "comment-empty-line-before": null,
     "no-descending-specificity": null,
-    "no-duplicate-selectors": null,
   }
 }
diff --git a/src/stylesheets/asciidoctor.css b/src/stylesheets/asciidoctor.css
index 5ee8ecf8..ec43bae9 100644
--- a/src/stylesheets/asciidoctor.css
+++ b/src/stylesheets/asciidoctor.css
@@ -1,32 +1,75 @@
 /*! Asciidoctor default stylesheet | MIT License | https://asciidoctor.org */
 /* Uncomment the following line when using as a custom stylesheet */
 /* @import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"; */
+*,
+::before,
+::after {
+  box-sizing: border-box;
+}
+
 html {
-  font-family: sans-serif;
+  font-size: 100%;
   -webkit-text-size-adjust: 100%;
 }
 
-a {
-  background: none;
+body {
+  background: #fff;
+  color: rgba(0, 0, 0, 0.8);
+  padding: 0;
+  margin: 0;
+  font-family: "Noto Serif", "DejaVu Serif", serif;
+  font-size: inherit;
+  line-height: 1;
+  position: relative;
+  cursor: auto;
+  tab-size: 4;
+  word-wrap: anywhere;
+  -moz-osx-font-smoothing: grayscale;
+  -webkit-font-smoothing: antialiased;
 }
 
-a:focus {
-  outline: thin dotted;
+dl,
+dt,
+dd,
+ul,
+ol,
+li,
+h1,
+h2,
+h3,
+h4,
+h5,
+h6,
+pre,
+form,
+p,
+blockquote,
+th,
+td {
+  margin: 0;
+  padding: 0;
+}
+
+a {
+  background: none;
+  color: #2156a5;
+  text-decoration: underline;
+  line-height: inherit;
 }
 
 a:active,
 a:hover {
+  cursor: pointer;
   outline: 0;
 }
 
-h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
+a:focus {
+  outline: thin dotted;
 }
 
-b,
-strong {
-  font-weight: bold;
+a:hover,
+a:focus {
+  color: #1d4b8f;
 }
 
 abbr {
@@ -39,37 +82,76 @@ abbr[title] {
   text-decoration: none;
 }
 
-dfn {
-  font-style: italic;
-}
-
-hr {
-  height: 0;
+b,
+strong {
+  font-weight: bold;
+  line-height: inherit;
 }
 
-mark {
-  background: #ff0;
-  color: #000;
+strong strong {
+  font-weight: 400;
 }
 
 code,
 kbd,
 pre,
 samp {
-  font-family: monospace;
+  font-family: "Droid Sans Mono", "DejaVu Sans Mono", monospace;
   font-size: 1em;
 }
 
+code {
+  font-weight: 400;
+  color: rgba(0, 0, 0, 0.9);
+}
+
 pre {
+  color: rgba(0, 0, 0, 0.9);
+  line-height: 1.45;
+  text-rendering: optimizeSpeed;
   white-space: pre-wrap;
 }
 
+dfn {
+  font-style: italic;
+}
+
+em,
+i {
+  font-style: italic;
+  line-height: inherit;
+}
+
+em em {
+  font-style: normal;
+}
+
+hr {
+  border: solid #dddddf;
+  border-width: 1px 0 0;
+  clear: both;
+  height: 0;
+  margin: 1.25em 0 1.1875em;
+}
+
+mark {
+  background: #ff0;
+  color: #000;
+}
+
+p {
+  line-height: 1.6;
+  margin-bottom: 1.25rem;
+  text-rendering: optimizeLegibility;
+}
+
 q {
   quotes: "\201C" "\201D" "\2018" "\2019";
 }
 
 small {
-  font-size: 80%;
+  font-size: 60%;
+  line-height: inherit;
 }
 
 sub,
@@ -90,6 +172,14 @@ sub {
 
 img {
   border: 0;
+  -ms-interpolation-mode: bicubic;
+}
+
+img,
+object,
+svg {
+  display: inline-block;
+  vertical-align: middle;
 }
 
 svg:not(:root) {
@@ -166,42 +256,6 @@ input::-moz-focus-inner {
 
 textarea {
   overflow: auto;
-  vertical-align: top;
-}
-
-table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-
-*,
-::before,
-::after {
-  box-sizing: border-box;
-}
-
-html,
-body {
-  font-size: 100%;
-}
-
-body {
-  background: #fff;
-  color: rgba(0, 0, 0, 0.8);
-  padding: 0;
-  margin: 0;
-  font-family: "Noto Serif", "DejaVu Serif", serif;
-  line-height: 1;
-  position: relative;
-  cursor: auto;
-  tab-size: 4;
-  word-wrap: anywhere;
-  -moz-osx-font-smoothing: grayscale;
-  -webkit-font-smoothing: antialiased;
-}
-
-a:hover {
-  cursor: pointer;
 }
 
 img,
@@ -216,10 +270,6 @@ embed {
   height: 100%;
 }
 
-img {
-  -ms-interpolation-mode: bicubic;
-}
-
 .left {
   float: left !important;
 }
@@ -248,18 +298,6 @@ img {
   display: none;
 }
 
-img,
-object,
-svg {
-  display: inline-block;
-  vertical-align: middle;
-}
-
-textarea {
-  height: auto;
-  min-height: 50px;
-}
-
 select {
   width: 100%;
 }
@@ -290,52 +328,6 @@ table.tableblock > .title,
   margin-bottom: 0.25em;
 }
 
-div,
-dl,
-dt,
-dd,
-ul,
-ol,
-li,
-h1,
-h2,
-h3,
-#toctitle,
-.sidebarblock > .content > .title,
-h4,
-h5,
-h6,
-pre,
-form,
-p,
-blockquote,
-th,
-td {
-  margin: 0;
-  padding: 0;
-}
-
-a {
-  color: #2156a5;
-  text-decoration: underline;
-  line-height: inherit;
-}
-
-a:hover,
-a:focus {
-  color: #1d4b8f;
-}
-
-a img {
-  border: 0;
-}
-
-p {
-  line-height: 1.6;
-  margin-bottom: 1.25em;
-  text-rendering: optimizeLegibility;
-}
-
 p aside {
   font-size: 0.875em;
   line-height: 1.35;
@@ -357,7 +349,8 @@ h6 {
   text-rendering: optimizeLegibility;
   margin-top: 1em;
   margin-bottom: 0.5em;
-  line-height: 1.0125em;
+  line-height: 1.2;
+  word-spacing: -0.05em;
 }
 
 h1 small,
@@ -368,7 +361,6 @@ h3 small,
 h4 small,
 h5 small,
 h6 small {
-  font-size: 60%;
   color: #e99b8f;
   line-height: 0;
 }
@@ -396,36 +388,6 @@ h6 {
   font-size: 1em;
 }
 
-hr {
-  border: solid #dddddf;
-  border-width: 1px 0 0;
-  clear: both;
-  margin: 1.25em 0 1.1875em;
-}
-
-em,
-i {
-  font-style: italic;
-  line-height: inherit;
-}
-
-strong,
-b {
-  font-weight: bold;
-  line-height: inherit;
-}
-
-small {
-  font-size: 60%;
-  line-height: inherit;
-}
-
-code {
-  font-family: "Droid Sans Mono", "DejaVu Sans Mono", monospace;
-  font-weight: 400;
-  color: rgba(0, 0, 0, 0.9);
-}
-
 ul,
 ol,
 dl {
@@ -477,6 +439,7 @@ dl dt {
 
 dl dd {
   margin-bottom: 1.25em;
+  margin-left: 1.125em;
 }
 
 blockquote {
@@ -492,17 +455,6 @@ blockquote p {
 }
 
 @media screen and (min-width: 768px) {
-  h1,
-  h2,
-  h3,
-  #toctitle,
-  .sidebarblock > .content > .title,
-  h4,
-  h5,
-  h6 {
-    line-height: 1.2;
-  }
-
   h1 {
     font-size: 2.75em;
   }
@@ -524,8 +476,10 @@ blockquote p {
 
 table {
   background: #fff;
-  margin-bottom: 1.25em;
   border: 1px solid #dedede;
+  border-collapse: collapse;
+  border-spacing: 0;
+  margin-bottom: 1.25em;
   word-wrap: normal;
 }
 
@@ -564,18 +518,6 @@ table tfoot tr td {
   line-height: 1.6;
 }
 
-h1,
-h2,
-h3,
-#toctitle,
-.sidebarblock > .content > .title,
-h4,
-h5,
-h6 {
-  line-height: 1.2;
-  word-spacing: -0.05em;
-}
-
 h1 strong,
 h2 strong,
 h3 strong,
@@ -600,7 +542,7 @@ h6 strong {
 .clearfix::after,
 .float-group::before,
 .float-group::after {
-  content: " ";
+  content: "";
   display: table;
 }
 
@@ -633,13 +575,6 @@ h6 strong {
   text-rendering: optimizeSpeed;
 }
 
-pre {
-  color: rgba(0, 0, 0, 0.9);
-  font-family: "Droid Sans Mono", "DejaVu Sans Mono", monospace;
-  line-height: 1.45;
-  text-rendering: optimizeSpeed;
-}
-
 pre code,
 pre pre {
   color: inherit;
@@ -657,20 +592,11 @@ pre.nowrap pre {
   word-wrap: normal;
 }
 
-em em {
-  font-style: normal;
-}
-
-strong strong {
-  font-weight: 400;
-}
-
 .keyseq {
   color: rgba(51, 51, 51, 0.8);
 }
 
 kbd {
-  font-family: "Droid Sans Mono", "DejaVu Sans Mono", monospace;
   display: inline-block;
   color: rgba(0, 0, 0, 0.8);
   font-size: 0.65em;
@@ -762,7 +688,7 @@ p a > code:hover {
 #footnotes::after,
 #footer::before,
 #footer::after {
-  content: " ";
+  content: "";
   display: table;
 }
 
@@ -775,6 +701,7 @@ p a > code:hover {
 
 #content {
   margin-top: 1.25em;
+  margin-bottom: 0.625em;
 }
 
 #content::before {
@@ -1007,10 +934,6 @@ body.toc2 #header > h1:nth-last-child(2) {
   line-height: 1.44;
 }
 
-#content {
-  margin-bottom: 0.625em;
-}
-
 .sect1 {
   padding-bottom: 0.625em;
 }
@@ -1230,11 +1153,12 @@ table.tableblock.fit-content > caption.title {
 }
 
 .exampleblock > .content {
-  border: 1px solid #e6e6e6;
+  border: 1px solid #e0e0dc;
   margin-bottom: 1.25em;
   padding: 1.25em;
-  background: #fff;
+  background: #fffef7;
   border-radius: 4px;
+  box-shadow: 0 1px 4px #e0e0dc;
 }
 
 .exampleblock > .content > :first-child {
@@ -1690,10 +1614,6 @@ ul li ol {
   margin-left: 1.5em;
 }
 
-dl dd {
-  margin-left: 1.125em;
-}
-
 dl dd:last-child,
 dl dd:last-child > :last-child {
   margin-bottom: 0;
@@ -2220,10 +2140,6 @@ summary {
   font-size: 1.0625rem;
 }
 
-p {
-  margin-bottom: 1.25rem;
-}
-
 .sidebarblock p,
 .sidebarblock dt,
 .sidebarblock td.content,
@@ -2231,12 +2147,6 @@ p.tableblock {
   font-size: 1em;
 }
 
-.exampleblock > .content {
-  background: #fffef7;
-  border-color: #e0e0dc;
-  box-shadow: 0 1px 4px #e0e0dc;
-}
-
 .print-only {
   display: none !important;
 }