diff --git a/internal/godoc/dochtml/template_body.go b/internal/godoc/dochtml/template_body.go
new file mode 100644
index 0000000..2cbb342
--- /dev/null
+++ b/internal/godoc/dochtml/template_body.go
@@ -0,0 +1,190 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package dochtml
+
+const tmplBody = `
+
+` + IdentifierBodyStart + ` {{/* Documentation content container */}}
+
+{{- if or .Doc (index .Examples.Map "") -}}
+	<section class="Documentation-overview">
+		<h2 tabindex="-1" id="pkg-overview" class="Documentation-overviewHeader">Overview <a href="#pkg-overview">¶</a></h2>{{"\n\n" -}}
+		{{render_doc .Doc}}{{"\n" -}}
+		{{- template "example" (index .Examples.Map "") -}}
+	</section>
+{{- end -}}
+
+{{- if or .Consts .Vars .Funcs .Types .Examples.List -}}
+	<section class="Documentation-index">
+		<h3 id="pkg-index" class="Documentation-indexHeader">Index <a href="#pkg-index">¶</a></h3>{{"\n\n" -}}
+		<ul class="Documentation-indexList">{{"\n" -}}
+			{{- if .Consts -}}<li class="Documentation-indexConstants"><a href="#pkg-constants">Constants</a></li>{{"\n"}}{{- end -}}
+			{{- if .Vars -}}<li class="Documentation-indexVariables"><a href="#pkg-variables">Variables</a></li>{{"\n"}}{{- end -}}
+
+			{{- range .Funcs -}}
+			<li class="Documentation-indexFunction">
+				<a href="#{{.Name}}">{{render_synopsis .Decl}}</a>
+			</li>{{"\n"}}
+			{{- end -}}
+
+			{{- range .Types -}}
+				{{- $tname := .Name -}}
+				<li class="Documentation-indexType"><a href="#{{$tname}}">type {{$tname}}</a></li>{{"\n"}}
+				{{- with .Funcs -}}
+					<li><ul class="Documentation-indexTypeFunctions">{{"\n" -}}
+					{{range .}}<li><a href="#{{.Name}}">{{render_synopsis .Decl}}</a></li>{{"\n"}}{{end}}
+					</ul></li>{{"\n" -}}
+				{{- end -}}
+				{{- with .Methods -}}
+					<li><ul class="Documentation-indexTypeMethods">{{"\n" -}}
+					{{range .}}<li><a href="#{{$tname}}.{{.Name}}">{{render_synopsis .Decl}}</a></li>{{"\n"}}{{end}}
+					</ul></li>{{"\n" -}}
+				{{- end -}}
+			{{- end -}}
+
+			{{- range $marker, $item := .Notes -}}
+			<li class="Documentation-indexNote"><a href="#pkg-note-{{$marker}}">{{$marker}}s</a></li>
+			{{- end -}}
+		</ul>{{"\n" -}}
+	</section>
+
+	{{- if .Examples.List -}}
+	<section class="Documentation-examples">
+		<h3 tabindex="-1" id="pkg-examples" class="Documentation-examplesHeader">Examples <a href="#pkg-examples">¶</a></h3>{{"\n" -}}
+		<ul class="Documentation-examplesList">{{"\n" -}}
+			{{- range .Examples.List -}}
+				<li><a href="#{{.ID}}" class="js-exampleHref">{{or .ParentID "Package"}}{{with .Suffix}} ({{.}}){{end}}</a></li>{{"\n" -}}
+			{{- end -}}
+		</ul>{{"\n" -}}
+	</section>
+	{{- end -}}
+
+	{{- if .Consts -}}
+	<section class="Documentation-constants">
+		<h3 tabindex="-1" id="pkg-constants" class="Documentation-constantsHeader">Constants <a href="#pkg-constants">¶</a></h3>{{"\n"}}
+		{{- range .Consts -}}
+			{{- $out := render_decl .Doc .Decl -}}
+			{{- $out.Decl -}}
+			{{- $out.Doc -}}
+			{{"\n"}}
+		{{- end -}}
+	</section>
+	{{- end -}}
+
+	{{- if .Vars -}}
+	<section class="Documentation-variables">
+		<h3 tabindex="-1" id="pkg-variables" class="Documentation-variablesHeader">Variables <a href="#pkg-variables">¶</a></h3>{{"\n"}}
+		{{- range .Vars -}}
+			{{- $out := render_decl .Doc .Decl -}}
+			{{- $out.Decl -}}
+			{{- $out.Doc -}}
+			{{"\n"}}
+		{{- end -}}
+	</section>
+	{{- end -}}
+
+	{{- if .Funcs -}}
+	<section class="Documentation-functions">
+		{{- range .Funcs -}}
+		<div class="Documentation-function">
+			{{- $id := safe_id .Name -}}
+			<h3 tabindex="-1" id="{{$id}}" data-kind="function" class="Documentation-functionHeader">func {{source_link .Name .Decl}} <a href="#{{$id}}">¶</a></h3>{{"\n"}}
+			{{- $out := render_decl .Doc .Decl -}}
+			{{- $out.Decl -}}
+			{{- $out.Doc -}}
+			{{"\n"}}
+			{{- template "example" (index $.Examples.Map .Name) -}}
+		</div>
+		{{- end -}}
+	</section>
+	{{- end -}}
+
+	{{- if .Types -}}
+	<section class="Documentation-types">
+		{{- range .Types -}}
+		<div class="Documentation-type">
+			{{- $tname := .Name -}}
+			{{- $id := safe_id .Name -}}
+			<h3 tabindex="-1" id="{{$id}}" data-kind="type" class="Documentation-typeHeader">type {{source_link .Name .Decl}} <a href="#{{$id}}">¶</a></h3>{{"\n"}}
+			{{- $out := render_decl .Doc .Decl -}}
+			{{- $out.Decl -}}
+			{{- $out.Doc -}}
+			{{"\n"}}
+			{{- template "example" (index $.Examples.Map .Name) -}}
+
+			{{- range .Consts -}}
+			<div class="Documentation-typeConstant">
+				{{- $out := render_decl .Doc .Decl -}}
+				{{- $out.Decl -}}
+				{{- $out.Doc -}}
+				{{"\n"}}
+			</div>
+			{{- end -}}
+
+			{{- range .Vars -}}
+			<div class="Documentation-typeVariable">
+				{{- $out := render_decl .Doc .Decl -}}
+				{{- $out.Decl -}}
+				{{- $out.Doc -}}
+				{{"\n"}}
+			</div>
+			{{- end -}}
+
+			{{- range .Funcs -}}
+			<div class="Documentation-typeFunc">
+				{{- $id := safe_id .Name -}}
+				<h3 tabindex="-1" id="{{$id}}" data-kind="function" class="Documentation-typeFuncHeader">func {{source_link .Name .Decl}} <a href="#{{$id}}">¶</a></h3>{{"\n"}}
+				{{- $out := render_decl .Doc .Decl -}}
+				{{- $out.Decl -}}
+				{{- $out.Doc -}}
+				{{"\n"}}
+				{{- template "example" (index $.Examples.Map .Name) -}}
+			</div>
+			{{- end -}}
+
+			{{- range .Methods -}}
+			<div class="Documentation-typeMethod">
+				{{- $name := (printf "%s.%s" $tname .Name) -}}
+				{{- $id := (safe_id $name) -}}
+				<h3 tabindex="-1" id="{{$id}}" data-kind="method" class="Documentation-typeMethodHeader">func ({{.Recv}}) {{source_link .Name .Decl}} <a href="#{{$id}}">¶</a></h3>{{"\n"}}
+				{{- $out := render_decl .Doc .Decl -}}
+				{{- $out.Decl -}}
+				{{- $out.Doc -}}
+				{{"\n"}}
+				{{- template "example" (index $.Examples.Map $name) -}}
+			</div>
+			{{- end -}}
+		</div>
+		{{- end -}}
+	</section>
+
+	<section class="Documentation-files">
+		<h3 tabindex="-1" id="pkg-files" class="Documentation-filesHeader">Package Files <a href="#pkg-files">¶</a></h3>
+		<ul class="Documentation-filesList">
+			{{- range .Filenames -}}
+				<li>{{file_link .}}</li>
+			{{- end -}}
+		</ul>
+	</section>
+	{{- end -}}
+{{- end -}}
+
+{{- if .Notes -}}
+<section class="Documentation-notes">
+	{{- range $marker, $content := .Notes -}}
+	<div class="Documentation-note">
+		<h2 tabindex="-1" id="{{index $.NoteIDs $marker}}" class="Documentation-noteHeader">{{$marker}}s <a href="#pkg-note-{{$marker}}">¶</a></h2>
+		<ul class="Documentation-noteList" style="padding-left: 20px; list-style: initial;">{{"\n" -}}
+		{{- range $v := $content -}}
+			<li style="margin: 6px 0 6px 0;">{{render_doc $v.Body}}</li>
+		{{- end -}}
+		</ul>{{"\n" -}}
+	</div>
+	{{- end -}}
+</section>
+{{- end -}}
+
+` + IdentifierBodyEnd + ` {{/* End documentation content container */}}
+`
diff --git a/internal/godoc/dochtml/template_sidenav.go b/internal/godoc/dochtml/template_sidenav.go
new file mode 100644
index 0000000..976bbdf
--- /dev/null
+++ b/internal/godoc/dochtml/template_sidenav.go
@@ -0,0 +1,156 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package dochtml
+
+const tmplSidenav = `
+{{if or .Doc .Consts .Vars .Funcs .Types .Examples.List}}
+	` + IdentifierSidenavStart + `
+		<ul role="tree" aria-label="Outline">
+			{{if or .Doc (index .Examples.Map "")}}
+				<li class="DocNav-overview" role="none">
+					<a href="#pkg-overview" role="treeitem" aria-level="1" tabindex="0">Overview</a>
+				</li>
+			{{end}}
+			{{- if or .Consts .Vars .Funcs .Types .Examples.List -}}
+				<li class="DocNav-index" role="none">
+					<a href="#pkg-index" role="treeitem" aria-level="1" tabindex="0">Index</a>
+				</li>
+			{{end}}
+			{{if .Examples.List}}
+				<li class="DocNav-examples" role="none">
+					<a href="#pkg-examples" role="treeitem" aria-level="1" tabindex="-1">Examples</a>
+				</li>
+			{{end}}
+			{{if .Consts}}
+				<li class="DocNav-constants" role="none">
+					<a href="#pkg-constants" role="treeitem" aria-level="1" tabindex="-1">Constants</a>
+				</li>
+			{{end}}
+			{{if .Vars}}
+				<li class="DocNav-variables" role="none">
+					<a href="#pkg-variables" role="treeitem" aria-level="1" tabindex="-1">Variables</a>
+				</li>
+			{{end}}
+
+			{{if .Funcs}}
+				<li class="DocNav-functions" role="none">
+					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="true" aria-level="1" aria-owns="nav-group-functions" tabindex="-1">Functions</span>
+					<ul role="group" id="nav-group-functions">
+						{{range .Funcs}}
+							<li role="none">
+								<a href="#{{.Name}}" title="{{render_short_synopsis .Decl}}" role="treeitem" aria-level="2" tabindex="-1">{{render_short_synopsis .Decl}}</a>
+							</li>
+						{{end}}
+					</ul>
+				</li>
+			{{end}}
+
+			{{if .Types}}
+				<li class="DocNav-types" role="none">
+					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="true" aria-level="1" aria-owns="nav-group-types" tabindex="-1">Types</span>
+					<ul role="group" id="nav-group-types">
+						{{range .Types}}
+							{{$tname := .Name}}
+							<li role="none">
+								{{if or .Funcs .Methods}}
+									{{$navgroupname := (printf "nav.group.%s" $tname)}}
+									{{$navgroupid := (safe_id $navgroupname)}}
+									<a class="DocNav-groupLabel" href="#{{$tname}}" role="treeitem" aria-expanded="true" aria-level="2" data-aria-owns="{{$navgroupid}}" tabindex="-1">type {{$tname}}</a>
+									<ul role="group" id="{{$navgroupid}}">
+										{{range .Funcs}}
+											<li role="none">
+												<a href="#{{.Name}}" title="{{render_short_synopsis .Decl}}" role="treeitem" aria-level="3" tabindex="-1">{{render_short_synopsis .Decl}}</a>
+											</li>
+										{{end}}
+										{{range .Methods}}
+											<li role="none">
+												<a href="#{{$tname}}.{{.Name}}" title="{{render_short_synopsis .Decl}}" role="treeitem" aria-level="3" tabindex="-1">{{render_short_synopsis .Decl}}</a>
+											</li>
+										{{end}}
+									</ul>
+								{{else}}
+									<a href="#{{$tname}}" role="treeitem" aria-level="2" tabindex="-1">type {{$tname}}</a>
+								{{end}} {{/* if or .Funcs .Methods */}}
+							</li>
+						{{end}} {{/* range .Types */}}
+					</ul>
+				</li>
+			{{end}}
+
+			{{if .Notes}}
+				<li class="DocNav-notes" role="none">
+					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="true" aria-level="1" aria-owns="nav-group-notes" tabindex="-1">Notes</span>
+					<ul role="group" id="nav-group-notes">
+						{{range $marker, $item := .Notes}}
+							<li role="none">
+								<a href="#pkg-note-{{$marker}}" role="treeitem" aria-level="2" tabindex="-1">{{$marker}}s</a>
+							</li>
+						{{end}}
+					</ul>
+				</li>
+			{{end}}
+
+			{{if .Filenames}}
+				<li class="DocNav-files" role="none">
+					<a href="#pkg-files" role="treeitem" aria-level="1" tabindex="-1">Package Files</a>
+				</li>
+			{{end}}
+		</ul>
+	</nav>
+	` + IdentifierSidenavMobileStart + `
+		<label for="DocNavMobile-select" class="DocNavMobile-label">
+			<svg class="DocNavMobile-selectIcon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="black" width="18px" height="18px">
+				<path d="M0 0h24v24H0z" fill="none"/><path d="M3 9h14V7H3v2zm0 4h14v-2H3v2zm0 4h14v-2H3v2zm16 0h2v-2h-2v2zm0-10v2h2V7h-2zm0 6h2v-2h-2v2z"/>
+			</svg>
+			<span class="DocNavMobile-selectText js-mobileNavSelectText">Outline</span>
+		</label>
+		<select id="DocNavMobile-select" class="DocNavMobile-select">
+			<option value="">Outline</option>
+			{{if or .Doc (index .Examples.Map "")}}
+				<option value="pkg-overview">Overview</option>
+			{{end}}
+			{{if .Examples.List}}
+				<option value="pkg-examples">Examples</option>
+			{{end}}
+			{{if .Consts}}
+				<option value="pkg-constants">Constants</option>
+			{{end}}
+			{{if .Vars}}
+				<option value="pkg-variables">Variables</option>
+			{{end}}
+
+			{{if .Funcs}}
+				<optgroup label="Functions">
+					{{range .Funcs}}
+						<option value="{{.Name}}">{{render_short_synopsis .Decl}}</option>
+					{{end}}
+				</optgroup>
+			{{end}}
+
+			{{if .Types}}
+				<optgroup label="Types">
+					{{range .Types}}
+						{{$tname := .Name}}
+						<option value="{{$tname}}">type {{$tname}}</option>
+						{{range .Funcs}}
+							<option value="{{.Name}}">{{render_short_synopsis .Decl}}</option>
+						{{end}}
+						{{range .Methods}}
+							<option value="{{$tname}}.{{.Name}}">{{render_short_synopsis .Decl}}</option>
+						{{end}}
+					{{end}} {{/* range .Types */}}
+				</optgroup>
+			{{end}}
+
+			{{if .Notes}}
+				<optgroup label="Notes">
+					{{range $marker, $item := .Notes}}
+						<option value="pkg-note-{{$marker}}">{{$marker}}s</option>
+					{{end}}
+				</optgroup>
+			{{end}}
+		</select>
+	` + IdentifierSidenavEnd + `
+{{end}}`