diff --git a/README.ko.md b/README.ko.md
index 4b839a3..c016a98 100644
--- a/README.ko.md
+++ b/README.ko.md
@@ -120,7 +120,7 @@ subtitle: "<한 줄 소개>"            # 선택 — 헤더의 제목 아래에
 date: YYYY-MM-DD HH:MM:SS
 paper_author: "<기관>"             # 논문을 낸 기관(사람 이름 아님). 논문 글에만
 paper_doi: "10.48550/arXiv.<id>"   # 선택, 논문 글에만 — 메타 패널의 인용 수
-seo_title: "<짧은 제목>"            # 선택 — 논문 제목이 너무 길 때 <title>에 대신 씁니다
+seo_title: "<짧은 제목>"            # 선택 — 제목이 너무 길 때 <title>에 대신 씁니다
 description: >-                    # 선택, 평문 — 아래 설명 참고
   <검색 결과에 노출될 문장, 150자 안팎>
 categories: ["<유형>", "<주제>"]
diff --git a/README.md b/README.md
index 11619d0..8a2bdd2 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ subtitle: "<one-line pitch>"       # optional — shown under the title in the h
 date: YYYY-MM-DD HH:MM:SS
 paper_author: "<Org>"              # the paper's org, not people; paper posts only
 paper_doi: "10.48550/arXiv.<id>"   # optional, paper posts only — the citation count in the meta panel
-seo_title: "<shorter title>"       # optional — for <title> when the paper title is too long
+seo_title: "<shorter title>"       # optional — for <title> when the title is too long
 description: >-                    # optional, plain text — see below
   <search-snippet, ~150 chars>
 categories: ["<Type>", "<Topic>"]
diff --git a/_includes/head.html b/_includes/head.html
index e530a97..61d5592 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -44,6 +44,7 @@
 {%- if page.layout == 'page' -%}
 	{%- assign html_title = page_title | append: ' | ' | append: site.title -%}
 {%- endif -%}
+{%- if page.seo_title -%}{%- assign html_title = page.seo_title -%}{%- endif -%}
 {%- comment -%}
   A paper post's <title> says what the page is, in the words a reader searches
   with: "Mistral 7B 논문 리뷰", where the bare paper title gave "Mistral 7B".
diff --git a/_layouts/default.html b/_layouts/default.html
index bdf5ff7..86ba632 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -4,15 +4,19 @@
   {% include head.html %}
 
   <body>
-    <!-- Ten focusable elements sit before <main> on every page (logo, menu
-         button, seven nav links, theme toggle), and a long post then leads with a
+    <!-- A dozen focusable elements sit before <main> on every page (logo, menu
+         button, the nav links, theme toggle), and a long post then leads with a
          copy button per code block. Screen readers can jump by landmark; sighted
          keyboard users had no shortcut. -->
-    <a class="skip-link" href="#content">Skip to content</a>
+    <a class="skip-link" href="#main-content">Skip to content</a>
 
     {% include header.html %}
+    <!-- The bar's height before first paint, so a bar that wraps to two rows does
+         not drop the page once js/main.js runs; main.js keeps it in step.
+         768px is $tablet in _sass/base/_variables.scss, as in main.js. -->
+    <script>(function () { var n = document.querySelector('.navigation'); if (n && matchMedia('(min-width: 768px)').matches) document.documentElement.style.setProperty('--nav-height', n.offsetHeight + 'px'); })();</script>
 
-    <main class="page-content" id="content">
+    <main class="page-content" id="main-content">
       {{ content }}
     </main>
 
diff --git a/_layouts/post.html b/_layouts/post.html
index f85fa3b..64c111a 100644
--- a/_layouts/post.html
+++ b/_layouts/post.html
@@ -84,13 +84,13 @@ <h1 class="title">{{ page.title }}</h1>
       {% if page.adjacent_older %}
       <a class="post-nav-link prev" href="{{ page.adjacent_older.url | prepend: site.baseurl }}" rel="prev">
         <span class="post-nav-dir">← Previous</span>
-        <span class="post-nav-title">{{ page.adjacent_older.title }}</span>
+        <span class="post-nav-title" lang="{{ page.adjacent_older.lang | default: site.lang }}">{{ page.adjacent_older.title }}</span>
       </a>
       {% else %}<span></span>{% endif %}
       {% if page.adjacent_newer %}
       <a class="post-nav-link next" href="{{ page.adjacent_newer.url | prepend: site.baseurl }}" rel="next">
         <span class="post-nav-dir">Next →</span>
-        <span class="post-nav-title">{{ page.adjacent_newer.title }}</span>
+        <span class="post-nav-title" lang="{{ page.adjacent_newer.lang | default: site.lang }}">{{ page.adjacent_newer.title }}</span>
       </a>
       {% else %}<span></span>{% endif %}
     </nav>
diff --git a/_sass/_layout.scss b/_sass/_layout.scss
index b480185..76a58f5 100644
--- a/_sass/_layout.scss
+++ b/_sass/_layout.scss
@@ -60,16 +60,20 @@ main.page-content {
 	}
 }
 
-// Whatever the browser scrolls into view clears the fixed 66px header, which
+// Whatever the browser scrolls into view clears the fixed header, which
 // would otherwise cover it: fragment targets (the TOC, /tags/#… from another
-// page, the skip link's #content) and the control keyboard focus moves to.
+// page, the skip link's #main-content) and the control keyboard focus moves to.
 // Done here rather than in a click handler so it also holds for links followed
 // from elsewhere and for ids a CSS selector cannot parse ("#1-서론").
 //
 // No `scroll-behavior: smooth`. A smooth jump passes lazy images that load on
 // the way and grow the page, so on long posts it stopped short of the heading.
+// --nav-height is the bar's real height, set before first paint by an inline
+// script in _layouts/default.html and kept in step by js/main.js (both at
+// $tablet, 768px, written out there): more tabs than one
+// row holds wrap it to two, and the page moves down with it.
 html {
-	scroll-padding-top: 80px;
+	scroll-padding-top: calc(var(--nav-height, 66px) + 14px);
 }
 
 // Visible to assistive technology, not on screen. Used by the copy-button live
@@ -514,6 +518,20 @@ blockquote {
 		&.show {
 			display: block;
 		}
+
+		// The open phone menu is part of the fixed bar; held sideways, a phone is
+		// shorter than the list, and the last items sat below the screen.
+		@media screen and (max-width: $tablet - 1px) {
+			&.show {
+				max-height: calc(100vh - 4em);
+				max-height: calc(100dvh - 4em);
+				overflow-y: auto;
+				// The scroll box clips: room for the focus ring, at the end and
+				// wherever focus scrolls an item into view.
+				padding: 4px 4px 6px 0;
+				scroll-padding: 4px 0 6px;
+			}
+		}
 	}
 
 	ul li.nav-link {
@@ -560,7 +578,8 @@ blockquote {
 			// from 768px to about 785px, iPad portrait included. The bar wrapped to
 			// two rows, 130px tall, and hid the top of every page beneath it. 1.1em
 			// above it: seven tabs at 1.5em wrapped in the fallback font, before the
-			// web font arrives.
+			// web font arrives. A tab past what one row holds still wraps the bar;
+			// the page follows its height (--nav-height, below).
 			@include media ($tablet) {
 				padding-right: 1em;
 			}
@@ -612,7 +631,7 @@ blockquote {
 *	Body
 */
 .page-content {
-	margin-top: 66px;
+	margin-top: var(--nav-height, 66px);
 
 	.wrapper {
 		@include outer-container;
diff --git a/categories.html b/categories.html
index d0d6a22..54681ec 100644
--- a/categories.html
+++ b/categories.html
@@ -4,8 +4,8 @@
 title: "Categories"
 permalink: /categories/
 description: >-
-  Every post on this blog grouped by category — Paper Reviews, Paper Summaries,
-  Paper Surveys, Tech Guides, and Insights.
+  Every post on this blog grouped by category: paper reviews, summaries and
+  surveys, tech guides, and insights.
 ---
 
 {%- comment -%}
diff --git a/docs/tech-doc.md b/docs/tech-doc.md
index 24f1035..ce1dd3f 100644
--- a/docs/tech-doc.md
+++ b/docs/tech-doc.md
@@ -144,6 +144,10 @@ _site/paper-reviews/language-models/2025/01/23/<slug>.html
 달린 모든 페이지**를 찾아 `nav_order` 숫자 순으로 자동 나열한다. 새 탭을 넣고 싶으면 페이지
 프런트매터에 두 값을 더하면 된다. 탭 이름은 페이지 `title`이고, `nav_title`이 있으면 그것을 쓴다 —
 메뉴 폭이 48em이라 "Paper"로 시작하는 탭 셋이 두 줄로 넘쳤기 때문이다(Summaries·Reviews·Surveys).
+탭이 한 줄에 다 들어가지 않으면 메뉴가 두 줄로 내려가고, `js/main.js`가 실제 헤더 높이를
+`--nav-height`로 넘겨 본문과 앵커 위치가 함께 내려간다(첫 화면 전에는 `default.html`의 인라인
+스크립트가 같은 값을 넣는다). 지금 탭 이름은 합쳐 53자이고, 웹 글꼴로는 한 줄에 58자 안팎까지
+들어가지만 폴백 글꼴로는 여유가 없다.
 현재 순서:
 
 | nav_order | 페이지 | 소스 |
diff --git a/index.html b/index.html
index ed0bed7..b9249ea 100644
--- a/index.html
+++ b/index.html
@@ -28,9 +28,9 @@ <h1 class="title">{{ site.title }}</h1>
 	<div class="wrapper">
 		<ul class="post-list">
 			{% for post in paginator.posts %}
-			<li>
+			<li lang="{{ post.lang | default: site.lang }}">
 				<h2>
-					<a class="post-link" href="{{ post.url | prepend: site.baseurl }}" lang="{{ post.lang | default: site.lang }}"
+					<a class="post-link" href="{{ post.url | prepend: site.baseurl }}"
 						>{{ post.title }}</a
 					>
 				</h2>
diff --git a/js/main.js b/js/main.js
index cf28eb6..b7ec562 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,7 +1,8 @@
 // Site behaviors: theme toggle, code-copy, mobile menu, nav highlight,
 // sticky-nav class, image zoom (GLightbox), and the post table of contents.
 // Vanilla JS, no jQuery. The fixed-header offset for in-page jumps is CSS
-// (`scroll-padding-top` in _sass/_layout.scss), not script.
+// (`scroll-padding-top` in _sass/_layout.scss); this keeps its --nav-height
+// in step with the bar.
 document.addEventListener('DOMContentLoaded', function () {
   // Dark-mode toggle. Light is the default; dark is opt-in and persisted.
   // The OS setting is intentionally NOT followed.
@@ -121,6 +122,19 @@ document.addEventListener('DOMContentLoaded', function () {
   // Add a class to the nav once the page is scrolled
   var nav = document.querySelector('.navigation');
   if (nav) {
+    // The page starts below the fixed bar, which grows to two rows when its
+    // tabs do not fit on one. The phone menu's dropdown is not the bar: there
+    // the bar stays one row and the open menu covers the page on purpose.
+    var wide = window.matchMedia('(min-width: 768px)'); // $tablet, as in default.html
+    var syncNavHeight = function () {
+      if (wide.matches) document.documentElement.style.setProperty('--nav-height', nav.offsetHeight + 'px');
+      else document.documentElement.style.removeProperty('--nav-height');
+    };
+    if (window.ResizeObserver) new ResizeObserver(syncNavHeight).observe(nav);
+    else window.addEventListener('resize', syncNavHeight);
+    if (wide.addEventListener) wide.addEventListener('change', syncNavHeight);
+    else wide.addListener(syncNavHeight); // Safari before 14
+    syncNavHeight();
     window.addEventListener('scroll', function () {
       nav.classList.toggle('scrolled', window.pageYOffset > 50);
     }, { passive: true });
@@ -247,6 +261,9 @@ document.addEventListener('DOMContentLoaded', function () {
     var heads = document.querySelectorAll('.post-content h2[id]');
     if (heads.length >= 3) {
       var ul = toc.querySelector('ul');
+      // Headings that number themselves ("1. 배경") would read "2 1. 배경". Most of
+      // them, not one: a lone "1. …" among plain headings keeps the numbers.
+      var numbered = Array.prototype.filter.call(heads, function (h) { return /^\s*\d+[.)]\s/.test(h.textContent); }).length > heads.length / 2;
       heads.forEach(function (h, i) {
         var li = document.createElement('li');
         var a = document.createElement('a');
@@ -256,7 +273,8 @@ document.addEventListener('DOMContentLoaded', function () {
         num.textContent = i + 1;
         // Text node, not innerHTML: a heading that names a tag ("<think> 토큰")
         // would otherwise be parsed as markup.
-        a.append(num, h.textContent);
+        if (numbered) a.append(h.textContent);
+        else a.append(num, h.textContent);
         li.appendChild(a);
         ul.appendChild(li);
       });
diff --git a/script/lint-posts.rb b/script/lint-posts.rb
index 27d52b2..07e1300 100644
--- a/script/lint-posts.rb
+++ b/script/lint-posts.rb
@@ -50,7 +50,8 @@ def self.check(post, spec)
   def self.lightbox(post)
     # Fenced code keeps its line count, so an example there is neither read nor
     # shifts the line numbers after it.
-    body = post.body.gsub(/^\s*(`{3,}|~{3,}).*?^\s*\1[^\n]*/m) { |code| "\n" * code.count("\n") }
+    lines = post.body.split("\n", -1)
+    body = fences(lines).zip(lines).map { |state, line| state ? "" : line }.join("\n")
     body.to_enum(:scan, LIGHTBOX).filter_map do
       m = Regexp.last_match
       href = m[0][/\shref=["']([^"']+)/i, 1]
@@ -187,6 +188,34 @@ def self.translation(post, spec)
   end
 
   FENCE = /\A\s*(`{3,}|~{3,})/
+
+  # Per line: [:open, match] on a fence's first line, :code inside, :close on
+  # its last, nil outside. A fence inside a blockquote ("> ```") is code too,
+  # and only such a fence closes on a quoted marker: a "> ```" line inside a
+  # bare ```markdown block is part of its example. A blank line ends the
+  # blockquote, and with it a quoted fence left open (:unclosed).
+  def self.fences(lines)
+    fence = nil
+    quoted = false
+    lines.map do |line|
+      text = unquote(line)
+      if fence.nil?
+        next unless (m = text.match(FENCE))
+
+        fence = m[1]
+        quoted = line.match?(/\A\s*>/)
+        [:open, m]
+      elsif quoted && line.strip.empty?
+        fence = nil
+        :unclosed
+      elsif (quoted ? text : line).strip.match?(/\A#{Regexp.escape(fence[0])}{#{fence.size},}\z/)
+        fence = nil
+        :close
+      else
+        :code
+      end
+    end
+  end
   # A code span, opened and closed by the same run of backticks (``$$`` too).
   CODE_SPAN = /(`+).*?\1/
 
@@ -201,9 +230,9 @@ def self.strip_code(text)
   # writes, not all of HTML.
   HTML_ELEMENTS = %w[
     a abbr audio b blockquote br caption center cite code col colgroup dd del details
-    div dl dt em figcaption figure h1 h2 h3 h4 h5 h6 hr i iframe img ins kbd li mark
-    ol p picture pre script section small source span strong sub summary sup svg
-    table tbody td tfoot th thead tr ul video wbr
+    dfn div dl dt em figcaption figure h1 h2 h3 h4 h5 h6 hr i iframe img ins kbd li
+    mark ol p picture pre q samp script section small source span strong sub summary
+    sup svg table tbody td tfoot th thead time tr track u ul var video wbr
     circle defs g line path polygon polyline rect text tspan use
   ].to_set # the last row: an inline <svg>'s children
   # Elements that mean nothing bare: <img> or <audio> alone is a token, not media.
@@ -233,26 +262,27 @@ def self.body(post)
     found = []
     in_references = false
     lines = post.body.split("\n", -1)
-    fence = nil # the marker that opened the code fence we are in
-    fence_line = nil
+    states = fences(lines)
+    fence_line = nil # where a still-open code fence started
     block = nil # the line a still-open multi-line $$ block started on
     para = nil # the line a paragraph with an odd number of $$ started on
     math_seen = false
     lines.each_with_index do |line, i|
       n = post.body_line + i
-      if (m = line.match(FENCE))
-        if fence.nil?
-          fence = m[1]
-          fence_line = n
-          # kramdown's GFM fence takes one word after the marker; with more it
-          # renders the whole block as inline code.
-          found << "#{n}: code fence info has a space; write just the language" if line.strip.match?(/\A(`{3,}|~{3,})\s*\S+\s+\S/)
-        elsif line.strip.match?(/\A#{Regexp.escape(fence[0])}{#{fence.size},}\z/)
-          fence = nil
-        end
+      state = states[i]
+      if state.is_a?(Array)
+        fence_line = n
+        # kramdown's GFM fence takes one word after the marker; with more it
+        # renders the whole block as inline code.
+        found << "#{n}: code fence info has a space; write just the language" if unquote(line).strip.match?(/\A(`{3,}|~{3,})\s*\S+\s+\S/)
+      elsif state == :close
+        fence_line = nil
+      elsif state == :unclosed
+        found << "#{fence_line}: code fence never closed (a nested fence closes the outer one)"
+        fence_line = nil
         next
       end
-      next if fence
+      next if state
 
       # A display block over several lines opens on a line starting with $$ and
       # closes on the next line with an odd number of them: `$$` alone, or
@@ -294,7 +324,7 @@ def self.body(post)
       found.concat(table(lines, i, n)) if table_start?(lines, i)
     end
     found << "#{block}: $$ block never closed" if block
-    found << "#{fence_line}: code fence never closed (a nested fence closes the outer one)" if fence
+    found << "#{fence_line}: code fence never closed (a nested fence closes the outer one)" if fence_line
     found << "#{para}: unbalanced $$ in the paragraph" if para
     # MathJax loads only on posts that ask for it; without it $$...$$ ships as TeX.
     found << "1: the post has $$ math but no use_math: true" if math_seen && post.data["use_math"] != true
diff --git a/test/test_lint_posts.rb b/test/test_lint_posts.rb
index 29a5bdf..0db4f58 100644
--- a/test/test_lint_posts.rb
+++ b/test/test_lint_posts.rb
@@ -287,6 +287,20 @@ def test_translationese_and_a_colon_ending_in_prose
     assert_equal [], lint("### References\n\n* 보여지는 것들: 논문\n")
   end
 
+  # scholar-lens quotes a prompt as a fenced block inside "> ".
+  def test_a_fence_inside_a_blockquote_is_code
+    assert_equal [], lint("> ```text\n> 답을 <think> 안에 쓰세요: 그다음 답합니다\n> ```\n")
+    assert_equal [], lint("> ```html\n> <a class=\"glightbox\" href=\"/p\"><img src=\"/a.png\"></a>\n> ```\n")
+    assert_finding(/<think> is read as HTML/, lint("> 답을 <think> 안에 씁니다.\n"))
+    # A quoted fence in a Markdown example is part of the example.
+    assert_equal [], lint("```markdown\n> ```python\n> <think>\n> ```\n<think>\n```\n")
+    assert_finding(/code fence never closed/, lint("앞 문단입니다.\n\n> ```text\n> <think>\n"))
+    # The blockquote ends at the blank line, and the fence with it.
+    found = lint("> ```text\n> 인용입니다.\n\n<think> 뒤 문단입니다.\n\n```python\nx\n```\n")
+    assert_finding(/code fence never closed/, found)
+    assert_finding(/<think> is read as HTML/, found)
+  end
+
   def test_paper_doi_is_a_bare_doi_on_paper_posts_only
     with_doi = ->(doi) { FRONT.sub("paper_author: \"Mistral AI\"\n", "\\0paper_doi: #{doi}\n") }
     assert_equal [], lint(front: with_doi.call('"10.48550/arXiv.2310.06825"'))