Add anchors to headings

5 files changed, 46 insertions, 16 deletions

diff --git a/assets/_markdown.scss b/assets/_markdown.scss
index 7840ee3..17ee304 100644
--- a/assets/_markdown.scss
+++ b/assets/_markdown.scss
@@ -1,33 +1,53 @@
-@import 'variables';
+@import "variables";
 
 .markdown {
-  line-height: 1.6em;
+  line-height: 1.6;
 
   // remove padding at the beginning of page
   > :first-child {
     margin-top: 0;
   }
 
-  h1, h2, h3, h4, h5, h6 {
+  h1,
+  h2,
+  h3,
+  h4,
+  h5,
+  h6 {
     font-weight: normal;
-    line-height: 1em;
+    line-height: 1;
     margin-top: 1.5em;
     margin-bottom: $padding-16;
+
+    a.anchor {
+      display: none;
+      font-size: .75em;
+      vertical-align: middle;
+      text-decoration: none;
+    }
+
+    &:hover a.anchor {
+      display: initial;
+    }
   }
 
-  h4, h5, h6 {
+  h4,
+  h5,
+  h6 {
     font-weight: bolder;
   }
 
   h5 {
-    font-size: .875em;
+    font-size: 0.875em;
   }
 
   h6 {
-    font-size: .75em;
+    font-size: 0.75em;
   }
 
-  b, optgroup, strong {
+  b,
+  optgroup,
+  strong {
     font-weight: bolder;
   }
 
@@ -50,7 +70,7 @@
     padding: 0 $padding-4;
     background: $gray-200;
     border-radius: $border-radius;
-    font-size: .875em;
+    font-size: 0.875em;
   }
 
   pre {
@@ -72,8 +92,12 @@
     border-inline-start: $padding-4 solid $gray-200;
     border-radius: $border-radius;
 
-    :first-child { margin-top: 0; }
-    :last-child { margin-bottom: 0; }
+    :first-child {
+      margin-top: 0;
+    }
+    :last-child {
+      margin-bottom: 0;
+    }
   }
 
   table {
@@ -84,7 +108,8 @@
     margin-top: $padding-16;
     margin-bottom: $padding-16;
 
-    tr th, tr td {
+    tr th,
+    tr td {
       padding: $padding-8 $padding-16;
       border: $padding-1 solid $gray-200;
     }
@@ -100,7 +125,8 @@
     background: $gray-200;
   }
 
-  ul, ol {
+  ul,
+  ol {
     padding-inline-start: $padding-16 * 2;
   }
 
diff --git a/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.content b/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.content
index 2e5a9e1..263125b 100644
--- a/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.content
+++ b/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.content
@@ -1 +1 @@
-@charset "UTF-8";/*!normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css*/html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}main{display:block}h1{font-size:2em;margin:.67em 0}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace,monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}button,[type=button],[type=reset],[type=submit]{-webkit-appearance:button}button::-moz-focus-inner,[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner{border-style:none;padding:0}button:-moz-focusring,[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:.35em .75em .625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{display:block}summary{display:list-item}template{display:none}[hidden]{display:none}.flex{display:flex}.flex-auto{flex:1 1 auto}.flex-even{flex:1 1}.flex-wrap{flex-wrap:wrap}.justify-start{justify-content:flex-start}.justify-end{justify-content:flex-end}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.align-center{align-items:center}.mx-auto{margin:0 auto}.text-center{text-align:center}.hidden{display:none}.clearfix::after{content:"";display:table;clear:both}html{font-size:16px;letter-spacing:.33px;scroll-behavior:smooth;touch-action:manipulation}html,body{min-width:20rem;overflow-x:hidden}body{color:#000;background:#fff;font-weight:400;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;box-sizing:border-box}body *{box-sizing:inherit}h1,h2,h3,h4,h5{font-weight:400}a{text-decoration:none;color:#05b}img{vertical-align:baseline}aside nav ul{padding:0;margin:0;list-style:none}aside nav ul li{margin:1em 0;position:relative}aside nav ul a{display:block}aside nav ul a:hover{opacity:.5}aside nav ul ul{padding-inline-start:1rem}ul.pagination{display:flex;justify-content:center;list-style-type:none}ul.pagination .page-item a{padding:1rem}.container{max-width:80rem;margin:0 auto}.book-icon{filter:none}.book-brand{margin-top:0}.book-brand img{height:1.5em;width:auto;vertical-align:middle;margin-inline-end:.5rem}.book-menu{flex:0 0 16rem;font-size:.875rem}.book-menu nav{width:16rem;padding:1rem;position:fixed;top:0;bottom:0;overflow-x:hidden;overflow-y:auto}.book-menu a{color:inherit;word-wrap:break-word}.book-menu a.active{color:#05b}.book-menu a.collapsed{display:flex;justify-content:space-between}.book-menu a.collapsed::after{content:"▸"}.book-section-flat{margin-bottom:2rem}.book-section-flat:not(:first-child){margin-top:2rem}.book-section-flat>a,.book-section-flat>span{font-weight:bolder}.book-section-flat>ul{padding-inline-start:0}.book-page{min-width:20rem;flex-grow:1;padding:1rem}.book-post{margin-bottom:3rem}.book-header{display:none;margin-bottom:1rem}.book-header label{line-height:0}.book-search{position:relative;margin:1rem 0;border-bottom:1px solid transparent}.book-search input{width:100%;padding:.5rem;border:0;border-radius:.25rem;background:#f8f9fa;color:#000}.book-search input:required+.book-search-spinner{display:block}.book-search .book-search-spinner{position:absolute;top:0;margin:.5rem;margin-inline-start:calc(100% - 1.5rem);width:1rem;height:1rem;border:1px solid transparent;border-top-color:#000;border-radius:50%;animation:spin 1s ease infinite}@keyframes spin{100%{transform:rotate(360deg)}}.book-toc{flex:0 0 16rem;font-size:.75rem}.book-toc nav{width:16rem;padding:1rem;position:fixed;top:0;bottom:0;overflow-x:hidden;overflow-y:auto}.book-toc img{height:1em}.book-toc nav>ul>li:first-child{margin-top:0}.book-footer{padding-top:1rem;font-size:.875rem}.book-footer img{height:1em;margin-inline-end:.5rem}.book-comments{margin-top:1rem}.book-languages{position:relative;overflow:visible;padding:1rem;margin:-1rem}.book-languages ul{margin:0;padding:0;list-style:none}.book-languages ul li{white-space:nowrap;cursor:pointer}.book-languages:hover .book-languages-list,.book-languages:focus .book-languages-list,.book-languages:focus-within .book-languages-list{display:block}.book-languages .book-languages-list{display:none;position:absolute;bottom:100%;left:0;padding:.5rem 0;background:#fff;box-shadow:0 0 .25rem rgba(0,0,0,.1)}.book-languages .book-languages-list li img{opacity:.25}.book-languages .book-languages-list li.active img,.book-languages .book-languages-list li:hover img{opacity:1}.book-languages .book-languages-list a{color:inherit;padding:.5rem 1rem}.book-home{padding:1rem}aside nav,.book-page,.book-header aside,.markdown{transition:.2s ease-in-out;transition-property:transform,margin,opacity;will-change:transform,margin}@media screen and (max-width:56rem){.book-menu{margin-inline-start:-16rem;font-size:16px}.book-toc{display:none}.book-header{display:block}#menu-control:checked+main .book-menu nav,#menu-control:checked+main .book-page{transform:translateX(16rem)}#menu-control:checked+main .book-header aside,#menu-control:checked+main .markdown{opacity:.25}#menu-control:checked+main .book-menu-overlay{display:block;position:absolute;top:0;bottom:0;left:0;right:0}body[dir=rtl] #menu-control:checked+main .book-menu nav,body[dir=rtl] #menu-control:checked+main .book-page{transform:translateX(-16rem)}#toc-control:checked+aside{display:block}}@media screen and (min-width:80rem){.book-page,.book-menu nav,.book-toc nav{padding:2rem 1rem}}@font-face{font-family:roboto;font-style:italic;font-weight:300;font-display:swap;src:local("Roboto Light Italic"),local("Roboto-LightItalic"),url(fonts/roboto-v19-latin-300italic.woff2)format("woff2"),url(fonts/roboto-v19-latin-300italic.woff)format("woff")}@font-face{font-family:roboto;font-style:normal;font-weight:400;font-display:swap;src:local("Roboto"),local("Roboto-Regular"),url(fonts/roboto-v19-latin-regular.woff2)format("woff2"),url(fonts/roboto-v19-latin-regular.woff)format("woff")}@font-face{font-family:roboto;font-style:normal;font-weight:700;font-display:swap;src:local("Roboto Bold"),local("Roboto-Bold"),url(fonts/roboto-v19-latin-700.woff2)format("woff2"),url(fonts/roboto-v19-latin-700.woff)format("woff")}@font-face{font-family:roboto mono;font-style:normal;font-weight:400;font-display:swap;src:local("Roboto Mono"),local("RobotoMono-Regular"),url(fonts/roboto-mono-v6-latin-regular.woff2)format("woff2"),url(fonts/roboto-mono-v6-latin-regular.woff)format("woff")}body{font-family:roboto,sans-serif}code{font-family:roboto mono,monospace}@media print{.book-menu,.book-footer,.book-toc{display:none}.book-header,.book-header aside{display:block}main{display:block!important}}.markdown{line-height:1.6em}.markdown>:first-child{margin-top:0}.markdown h1,.markdown h2,.markdown h3,.markdown h4,.markdown h5,.markdown h6{font-weight:400;line-height:1em;margin-top:1.5em;margin-bottom:1rem}.markdown h4,.markdown h5,.markdown h6{font-weight:bolder}.markdown h5{font-size:.875em}.markdown h6{font-size:.75em}.markdown b,.markdown optgroup,.markdown strong{font-weight:bolder}.markdown a{text-decoration:none}.markdown a:hover{text-decoration:underline}.markdown a:visited{color:#8440f1}.markdown img{max-width:100%}.markdown code{padding:0 .25rem;background:#e9ecef;border-radius:.25rem;font-size:.875em}.markdown pre{padding:1rem;background:#f8f9fa;border-radius:.25rem;overflow-x:auto}.markdown pre code{padding:0;background:0 0}.markdown blockquote{margin:1rem 0;padding:.5rem 1rem .5rem .75rem;border-inline-start:.25rem solid #e9ecef;border-radius:.25rem}.markdown blockquote :first-child{margin-top:0}.markdown blockquote :last-child{margin-bottom:0}.markdown table{overflow:auto;display:block;border-spacing:0;border-collapse:collapse;margin-top:1rem;margin-bottom:1rem}.markdown table tr th,.markdown table tr td{padding:.5rem 1rem;border:1px solid #e9ecef}.markdown table tr:nth-child(2n){background:#f8f9fa}.markdown hr{height:1px;border:none;background:#e9ecef}.markdown ul,.markdown ol{padding-inline-start:2rem}.markdown dl dt{font-weight:bolder;margin-top:1rem}.markdown dl dd{margin-inline-start:2rem}.markdown .highlight table tr td:nth-child(1) pre{margin:0;padding-inline-end:0}.markdown .highlight table tr td:nth-child(2) pre{margin:0;padding-inline-start:0}.markdown details{padding:1rem;border:1px solid #e9ecef;border-radius:.25rem}.markdown details summary{line-height:1;padding:1rem;margin:-1rem;cursor:pointer}.markdown details[open] summary{margin-bottom:0}.markdown-inner>:first-child{margin-top:0}.markdown-inner>:last-child{margin-bottom:0}.markdown .book-expand{margin-top:1rem;margin-bottom:1rem;border:1px solid #e9ecef;border-radius:.25rem;overflow:hidden}.markdown .book-expand .book-expand-head{background:#f8f9fa;padding:.5rem 1rem;cursor:pointer}.markdown .book-expand .book-expand-content{display:none;padding:1rem}.markdown .book-expand input[type=checkbox]:checked+.book-expand-content{display:block}.markdown .book-tabs{margin-top:1rem;margin-bottom:1rem;border:1px solid #e9ecef;border-radius:.25rem;overflow:hidden;display:flex;flex-wrap:wrap}.markdown .book-tabs label{display:inline-block;padding:.5rem 1rem;border-bottom:1px transparent;cursor:pointer}.markdown .book-tabs .book-tabs-content{order:999;width:100%;border-top:1px solid #f8f9fa;padding:1rem;display:none}.markdown .book-tabs input[type=radio]:checked+label{border-bottom:1px solid #05b}.markdown .book-tabs input[type=radio]:checked+label+.book-tabs-content{display:block}.markdown .book-columns{margin-left:-1rem;margin-right:-1rem}.markdown .book-columns>div{margin:1rem 0;min-width:10rem;padding:0 1rem}.markdown a.book-btn{display:inline-block;font-size:.875rem;color:#05b;line-height:2rem;padding:0 1rem;border:1px solid #05b;border-radius:.25rem;cursor:pointer}.markdown a.book-btn:hover{text-decoration:none}.markdown .book-hint.info{border-color:#6bf;background-color:rgba(102,187,255,.1)}.markdown .book-hint.warning{border-color:#fd6;background-color:rgba(255,221,102,.1)}.markdown .book-hint.danger{border-color:#f66;background-color:rgba(255,102,102,.1)}
\ No newline at end of file
+@charset "UTF-8";/*!normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css*/html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}main{display:block}h1{font-size:2em;margin:.67em 0}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace,monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}button,[type=button],[type=reset],[type=submit]{-webkit-appearance:button}button::-moz-focus-inner,[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner{border-style:none;padding:0}button:-moz-focusring,[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:.35em .75em .625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{display:block}summary{display:list-item}template{display:none}[hidden]{display:none}.flex{display:flex}.flex-auto{flex:1 1 auto}.flex-even{flex:1 1}.flex-wrap{flex-wrap:wrap}.justify-start{justify-content:flex-start}.justify-end{justify-content:flex-end}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.align-center{align-items:center}.mx-auto{margin:0 auto}.text-center{text-align:center}.hidden{display:none}.clearfix::after{content:"";display:table;clear:both}html{font-size:16px;letter-spacing:.33px;scroll-behavior:smooth;touch-action:manipulation}html,body{min-width:20rem;overflow-x:hidden}body{color:#000;background:#fff;font-weight:400;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;box-sizing:border-box}body *{box-sizing:inherit}h1,h2,h3,h4,h5{font-weight:400}a{text-decoration:none;color:#05b}img{vertical-align:baseline}aside nav ul{padding:0;margin:0;list-style:none}aside nav ul li{margin:1em 0;position:relative}aside nav ul a{display:block}aside nav ul a:hover{opacity:.5}aside nav ul ul{padding-inline-start:1rem}ul.pagination{display:flex;justify-content:center;list-style-type:none}ul.pagination .page-item a{padding:1rem}.container{max-width:80rem;margin:0 auto}.book-icon{filter:none}.book-brand{margin-top:0}.book-brand img{height:1.5em;width:auto;vertical-align:middle;margin-inline-end:.5rem}.book-menu{flex:0 0 16rem;font-size:.875rem}.book-menu nav{width:16rem;padding:1rem;position:fixed;top:0;bottom:0;overflow-x:hidden;overflow-y:auto}.book-menu a{color:inherit;word-wrap:break-word}.book-menu a.active{color:#05b}.book-menu a.collapsed{display:flex;justify-content:space-between}.book-menu a.collapsed::after{content:"▸"}.book-section-flat{margin-bottom:2rem}.book-section-flat:not(:first-child){margin-top:2rem}.book-section-flat>a,.book-section-flat>span{font-weight:bolder}.book-section-flat>ul{padding-inline-start:0}.book-page{min-width:20rem;flex-grow:1;padding:1rem}.book-post{margin-bottom:3rem}.book-header{display:none;margin-bottom:1rem}.book-header label{line-height:0}.book-search{position:relative;margin:1rem 0;border-bottom:1px solid transparent}.book-search input{width:100%;padding:.5rem;border:0;border-radius:.25rem;background:#f8f9fa;color:#000}.book-search input:required+.book-search-spinner{display:block}.book-search .book-search-spinner{position:absolute;top:0;margin:.5rem;margin-inline-start:calc(100% - 1.5rem);width:1rem;height:1rem;border:1px solid transparent;border-top-color:#000;border-radius:50%;animation:spin 1s ease infinite}@keyframes spin{100%{transform:rotate(360deg)}}.book-toc{flex:0 0 16rem;font-size:.75rem}.book-toc nav{width:16rem;padding:1rem;position:fixed;top:0;bottom:0;overflow-x:hidden;overflow-y:auto}.book-toc img{height:1em}.book-toc nav>ul>li:first-child{margin-top:0}.book-footer{padding-top:1rem;font-size:.875rem}.book-footer img{height:1em;margin-inline-end:.5rem}.book-comments{margin-top:1rem}.book-languages{position:relative;overflow:visible;padding:1rem;margin:-1rem}.book-languages ul{margin:0;padding:0;list-style:none}.book-languages ul li{white-space:nowrap;cursor:pointer}.book-languages:hover .book-languages-list,.book-languages:focus .book-languages-list,.book-languages:focus-within .book-languages-list{display:block}.book-languages .book-languages-list{display:none;position:absolute;bottom:100%;left:0;padding:.5rem 0;background:#fff;box-shadow:0 0 .25rem rgba(0,0,0,.1)}.book-languages .book-languages-list li img{opacity:.25}.book-languages .book-languages-list li.active img,.book-languages .book-languages-list li:hover img{opacity:1}.book-languages .book-languages-list a{color:inherit;padding:.5rem 1rem}.book-home{padding:1rem}aside nav,.book-page,.book-header aside,.markdown{transition:.2s ease-in-out;transition-property:transform,margin,opacity;will-change:transform,margin}@media screen and (max-width:56rem){.book-menu{margin-inline-start:-16rem;font-size:16px}.book-toc{display:none}.book-header{display:block}#menu-control:checked+main .book-menu nav,#menu-control:checked+main .book-page{transform:translateX(16rem)}#menu-control:checked+main .book-header aside,#menu-control:checked+main .markdown{opacity:.25}#menu-control:checked+main .book-menu-overlay{display:block;position:absolute;top:0;bottom:0;left:0;right:0}body[dir=rtl] #menu-control:checked+main .book-menu nav,body[dir=rtl] #menu-control:checked+main .book-page{transform:translateX(-16rem)}#toc-control:checked+aside{display:block}}@media screen and (min-width:80rem){.book-page,.book-menu nav,.book-toc nav{padding:2rem 1rem}}@font-face{font-family:roboto;font-style:italic;font-weight:300;font-display:swap;src:local("Roboto Light Italic"),local("Roboto-LightItalic"),url(fonts/roboto-v19-latin-300italic.woff2)format("woff2"),url(fonts/roboto-v19-latin-300italic.woff)format("woff")}@font-face{font-family:roboto;font-style:normal;font-weight:400;font-display:swap;src:local("Roboto"),local("Roboto-Regular"),url(fonts/roboto-v19-latin-regular.woff2)format("woff2"),url(fonts/roboto-v19-latin-regular.woff)format("woff")}@font-face{font-family:roboto;font-style:normal;font-weight:700;font-display:swap;src:local("Roboto Bold"),local("Roboto-Bold"),url(fonts/roboto-v19-latin-700.woff2)format("woff2"),url(fonts/roboto-v19-latin-700.woff)format("woff")}@font-face{font-family:roboto mono;font-style:normal;font-weight:400;font-display:swap;src:local("Roboto Mono"),local("RobotoMono-Regular"),url(fonts/roboto-mono-v6-latin-regular.woff2)format("woff2"),url(fonts/roboto-mono-v6-latin-regular.woff)format("woff")}body{font-family:roboto,sans-serif}code{font-family:roboto mono,monospace}@media print{.book-menu,.book-footer,.book-toc{display:none}.book-header,.book-header aside{display:block}main{display:block!important}}.markdown{line-height:1.6}.markdown>:first-child{margin-top:0}.markdown h1,.markdown h2,.markdown h3,.markdown h4,.markdown h5,.markdown h6{font-weight:400;line-height:1;margin-top:1.5em;margin-bottom:1rem}.markdown h1 a.anchor,.markdown h2 a.anchor,.markdown h3 a.anchor,.markdown h4 a.anchor,.markdown h5 a.anchor,.markdown h6 a.anchor{display:none;font-size:.75em;vertical-align:middle;text-decoration:none}.markdown h1:hover a.anchor,.markdown h2:hover a.anchor,.markdown h3:hover a.anchor,.markdown h4:hover a.anchor,.markdown h5:hover a.anchor,.markdown h6:hover a.anchor{display:initial}.markdown h4,.markdown h5,.markdown h6{font-weight:bolder}.markdown h5{font-size:.875em}.markdown h6{font-size:.75em}.markdown b,.markdown optgroup,.markdown strong{font-weight:bolder}.markdown a{text-decoration:none}.markdown a:hover{text-decoration:underline}.markdown a:visited{color:#8440f1}.markdown img{max-width:100%}.markdown code{padding:0 .25rem;background:#e9ecef;border-radius:.25rem;font-size:.875em}.markdown pre{padding:1rem;background:#f8f9fa;border-radius:.25rem;overflow-x:auto}.markdown pre code{padding:0;background:0 0}.markdown blockquote{margin:1rem 0;padding:.5rem 1rem .5rem .75rem;border-inline-start:.25rem solid #e9ecef;border-radius:.25rem}.markdown blockquote :first-child{margin-top:0}.markdown blockquote :last-child{margin-bottom:0}.markdown table{overflow:auto;display:block;border-spacing:0;border-collapse:collapse;margin-top:1rem;margin-bottom:1rem}.markdown table tr th,.markdown table tr td{padding:.5rem 1rem;border:1px solid #e9ecef}.markdown table tr:nth-child(2n){background:#f8f9fa}.markdown hr{height:1px;border:none;background:#e9ecef}.markdown ul,.markdown ol{padding-inline-start:2rem}.markdown dl dt{font-weight:bolder;margin-top:1rem}.markdown dl dd{margin-inline-start:2rem}.markdown .highlight table tr td:nth-child(1) pre{margin:0;padding-inline-end:0}.markdown .highlight table tr td:nth-child(2) pre{margin:0;padding-inline-start:0}.markdown details{padding:1rem;border:1px solid #e9ecef;border-radius:.25rem}.markdown details summary{line-height:1;padding:1rem;margin:-1rem;cursor:pointer}.markdown details[open] summary{margin-bottom:0}.markdown-inner>:first-child{margin-top:0}.markdown-inner>:last-child{margin-bottom:0}.markdown .book-expand{margin-top:1rem;margin-bottom:1rem;border:1px solid #e9ecef;border-radius:.25rem;overflow:hidden}.markdown .book-expand .book-expand-head{background:#f8f9fa;padding:.5rem 1rem;cursor:pointer}.markdown .book-expand .book-expand-content{display:none;padding:1rem}.markdown .book-expand input[type=checkbox]:checked+.book-expand-content{display:block}.markdown .book-tabs{margin-top:1rem;margin-bottom:1rem;border:1px solid #e9ecef;border-radius:.25rem;overflow:hidden;display:flex;flex-wrap:wrap}.markdown .book-tabs label{display:inline-block;padding:.5rem 1rem;border-bottom:1px transparent;cursor:pointer}.markdown .book-tabs .book-tabs-content{order:999;width:100%;border-top:1px solid #f8f9fa;padding:1rem;display:none}.markdown .book-tabs input[type=radio]:checked+label{border-bottom:1px solid #05b}.markdown .book-tabs input[type=radio]:checked+label+.book-tabs-content{display:block}.markdown .book-columns{margin-left:-1rem;margin-right:-1rem}.markdown .book-columns>div{margin:1rem 0;min-width:10rem;padding:0 1rem}.markdown a.book-btn{display:inline-block;font-size:.875rem;color:#05b;line-height:2rem;padding:0 1rem;border:1px solid #05b;border-radius:.25rem;cursor:pointer}.markdown a.book-btn:hover{text-decoration:none}.markdown .book-hint.info{border-color:#6bf;background-color:rgba(102,187,255,.1)}.markdown .book-hint.warning{border-color:#fd6;background-color:rgba(255,221,102,.1)}.markdown .book-hint.danger{border-color:#f66;background-color:rgba(255,102,102,.1)}
\ No newline at end of file
diff --git a/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.json b/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.json
index 3d7607a..f51d610 100644
--- a/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.json
+++ b/exampleSite/resources/_gen/assets/scss/book.scss_50fc8c04e12a2f59027287995557ceff.json
@@ -1 +1 @@
-{"Target":"book.min.e161f1fe2b283b6a43c29a52fde96e2387fade573e78efa6701d44c8499da76b.css","MediaType":"text/css","Data":{"Integrity":"sha256-4WHx/isoO2pDwppS/eluI4f63lc+eO+mcB1EyEmdp2s="}}
\ No newline at end of file
+{"Target":"book.min.947656565f9248015f7b2c792cb8b8c13ad749e25295c0634f4c7f1d1bde6a0a.css","MediaType":"text/css","Data":{"Integrity":"sha256-lHZWVl+SSAFfeyx5LLi4wTrXSeJSlcBjT0x/HRveago="}}
\ No newline at end of file
diff --git a/layouts/_default/_markup/render-heading.html b/layouts/_default/_markup/render-heading.html
new file mode 100644
index 0000000..5439d20
--- /dev/null
+++ b/layouts/_default/_markup/render-heading.html
@@ -0,0 +1,4 @@
+<h{{ .Level }} id="{{ .Anchor | safeURL }}">
+  {{ .Text | safeHTML }}
+  <a class="anchor" href="#{{ .Anchor | safeURL }}">#</a>
+</h{{ .Level }}>
diff --git a/layouts/_default/_markup/render-link.html b/layouts/_default/_markup/render-link.html
index 4995a32..464fa1a 100644
--- a/layouts/_default/_markup/render-link.html
+++ b/layouts/_default/_markup/render-link.html
@@ -6,7 +6,7 @@
 
 {{- define "portable-link" -}}
   {{- $destination := .Destination }}
-  {{- $isRemote := or (in .Destination "://") (strings.HasPrefix .Destination "//") }}
+  {{- $isRemote := or (in .Destination ":") (strings.HasPrefix .Destination "//") }}
   {{- if not $isRemote }}
     {{- $url := urls.Parse .Destination }}
     {{- $path := strings.TrimSuffix "/_index.md" $url.Path }}