:root {
  --paper: #f4f0e6;
  --paper-deep: #e9e2d3;
  --surface: #fffdf8;
  --surface-muted: #f8f5ed;
  --ink: #262722;
  --ink-soft: #595a52;
  --ink-faint: #7b7b70;
  --line: #d8d1c3;
  --line-strong: #bfb5a4;
  --accent: #97543d;
  --accent-dark: #713b2b;
  --accent-pale: #f3e4dc;
  --green: #49655b;
  --shadow: 0 16px 42px rgb(50 41 30 / 10%);
  --serif: "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Noto Serif JP", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
  --content: 720px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 7rem;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 11% 4%, rgb(255 255 255 / 62%), transparent 26rem),
    var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-color: rgb(151 84 61 / 45%);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-dark);
  text-decoration-color: currentColor;
}

button,
input,
select {
  color: inherit;
  font: inherit;
}

button,
select {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 3px solid rgb(151 84 61 / 45%);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1000;
  padding: 0.55rem 0.8rem;
  border-radius: 0.35rem;
  color: #fff;
  background: var(--accent-dark);
  transform: translateY(-160%);
  transition: transform 140ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid rgb(191 181 164 / 72%);
  background: rgb(244 240 230 / 92%);
  backdrop-filter: blur(14px);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1320px, calc(100% - 3rem));
  min-height: 4.25rem;
  margin: 0 auto;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--serif);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.035em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: var(--surface);
  background: var(--accent);
  font-family: Georgia, serif;
  font-size: 1.05rem;
  font-style: italic;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 650;
}

.site-nav a {
  text-decoration: none;
}

.reading-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transition: width 80ms linear;
}

.draft-notice {
  border-bottom: 1px solid #d9bcae;
  color: #5d3025;
  background: var(--accent-pale);
}

.draft-notice-inner {
  display: flex;
  align-items: center;
  width: min(1320px, calc(100% - 3rem));
  min-height: 2.85rem;
  margin: 0 auto;
  gap: 1.1rem;
  font-size: 0.76rem;
  line-height: 1.45;
}

.draft-notice strong {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  letter-spacing: 0.055em;
}

.draft-notice a {
  flex: 0 0 auto;
  margin-left: auto;
  font-weight: 700;
}

.status-dot {
  width: 0.46rem;
  height: 0.46rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgb(151 84 61 / 13%);
}

.index-main {
  width: min(1180px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 5.5rem 0 6.5rem;
}

.index-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line-strong);
  gap: 3rem;
}

.eyebrow,
.rail-label,
.preview-label {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.67rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.3;
}

.index-hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3.2rem, 7vw, 6.8rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.96;
}

.index-hero h1 em {
  color: var(--accent);
  font-size: 0.42em;
  font-style: normal;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.index-hero > div:first-child > p:last-child {
  max-width: 48rem;
  margin: 1.65rem 0 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: clamp(1rem, 1.7vw, 1.22rem);
  line-height: 1.9;
}

.index-stat {
  display: grid;
  width: 8.5rem;
  height: 8.5rem;
  place-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  text-align: center;
}

.index-stat strong {
  font-family: var(--serif);
  font-size: 2.5rem;
  font-weight: 500;
  line-height: 1;
}

.index-stat span {
  margin-top: 0.45rem;
  color: var(--ink-faint);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.index-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  margin: 2.4rem 0 2rem;
  gap: 0.75rem 1rem;
}

.search-box {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  min-height: 3.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.25rem;
  background: rgb(255 253 248 / 75%);
  box-shadow: 0 6px 18px rgb(50 41 30 / 4%);
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(151 84 61 / 10%);
}

.search-box > span {
  padding-left: 1.15rem;
  color: var(--ink-faint);
  font-family: Georgia, serif;
  font-size: 1.6rem;
  line-height: 1;
  transform: rotate(-18deg);
}

.search-box input {
  width: 100%;
  height: 3.5rem;
  padding: 0 1rem;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 0.92rem;
}

.search-box input::placeholder {
  color: #858276;
}

.search-box kbd {
  margin-right: 1rem;
  padding: 0.18rem 0.48rem;
  border: 1px solid var(--line);
  border-bottom-color: var(--line-strong);
  border-radius: 0.25rem;
  color: var(--ink-faint);
  background: var(--surface-muted);
  font: 0.72rem var(--sans);
}

.clear-search {
  min-height: 3.6rem;
  padding: 0 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.25rem;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 700;
}

.clear-search:hover,
.load-more:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  background: var(--surface);
}

.result-status {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--ink-faint);
  font-size: 0.74rem;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.concept-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 18rem;
  flex-direction: column;
  padding: 1.35rem 1.4rem 1.2rem;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: rgb(255 253 248 / 28%);
  transition: background 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.concept-card:hover,
.concept-card:focus-within {
  z-index: 5;
  background: var(--surface);
  box-shadow: 0 12px 30px rgb(50 41 30 / 10%);
  transform: translateY(-2px);
}

.concept-card-topline,
.concept-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--ink-faint);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.035em;
}

.concept-score {
  color: var(--green);
}

.concept-card h2 {
  margin: 1.15rem 0 0;
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.38;
}

.concept-card h2 a {
  text-decoration: none;
}

.concept-original {
  margin: 0.5rem 0 0;
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 0.74rem;
  font-style: italic;
  line-height: 1.4;
}

.concept-summary {
  display: -webkit-box;
  margin: 1rem 0 1.2rem;
  overflow: hidden;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 0.86rem;
  line-height: 1.75;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.concept-card-footer {
  margin-top: auto;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
}

.concept-card-footer a {
  font-weight: 800;
}

.concept-preview {
  position: absolute;
  top: calc(100% - 0.75rem);
  right: 0.9rem;
  left: 0.9rem;
  z-index: 10;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--accent);
  border-radius: 0.15rem;
  opacity: 0;
  background: var(--surface);
  box-shadow: var(--shadow);
  pointer-events: none;
  transform: translateY(-0.35rem);
  transition: opacity 120ms ease, transform 120ms ease;
}

.concept-card:hover .concept-preview,
.concept-card:focus-within .concept-preview {
  opacity: 1;
  transform: translateY(0);
}

.concept-preview strong {
  display: block;
  font-family: var(--serif);
  font-size: 1rem;
}

.concept-preview p:not(.preview-label) {
  margin: 0.55rem 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.65;
}

.concept-preview > span {
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 750;
}

.load-more-wrap,
.post-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2rem;
}

.load-more {
  min-width: 15rem;
  min-height: 3.2rem;
  padding: 0.65rem 1.2rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  font-size: 0.77rem;
  font-weight: 750;
  letter-spacing: 0.025em;
}

.no-results,
.empty-state {
  padding: 5rem 1rem;
  border: 1px solid var(--line-strong);
  text-align: center;
}

.no-results strong {
  font-family: var(--serif);
  font-size: 1.35rem;
}

.no-results p {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.scope-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  margin-top: 4.5rem;
  padding: 1.5rem 1.6rem;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  gap: 1.2rem;
}

.scope-note > div:first-child {
  display: grid;
  width: 2.45rem;
  height: 2.45rem;
  place-items: center;
  border: 1px solid var(--green);
  border-radius: 50%;
  color: var(--green);
  font-weight: 800;
}

.scope-note strong {
  font-family: var(--serif);
}

.scope-note p {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.scope-note > a {
  color: var(--accent-dark);
  font-size: 0.74rem;
  font-weight: 750;
}

.wiki-layout {
  display: grid;
  grid-template-columns: 215px minmax(0, var(--content)) 215px;
  justify-content: center;
  width: min(1320px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 3.4rem 0 7rem;
  gap: clamp(1.75rem, 3.5vw, 3.7rem);
}

.toc-rail,
.page-rail {
  min-width: 0;
}

.toc-panel,
.page-rail > *:first-child {
  position: sticky;
  top: 7.9rem;
}

.toc-toggle {
  display: none;
}

.toc-panel {
  max-height: calc(100vh - 10rem);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.toc-list {
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line-strong);
  list-style: none;
}

.toc-list li {
  margin: 0;
}

.toc-list a {
  display: block;
  margin-left: -1px;
  padding: 0.38rem 0.35rem 0.38rem 0.85rem;
  border-left: 2px solid transparent;
  color: var(--ink-faint);
  font-size: 0.72rem;
  line-height: 1.45;
  text-decoration: none;
}

.toc-list a:hover,
.toc-list a.is-active {
  border-left-color: var(--accent);
  color: var(--accent-dark);
  background: linear-gradient(90deg, rgb(151 84 61 / 7%), transparent 85%);
}

.toc-level-3 a {
  padding-left: 1.45rem;
  font-size: 0.68rem;
}

.toc-level-4 a {
  padding-left: 2rem;
  color: #88857a;
  font-size: 0.66rem;
}

.toc-empty {
  color: var(--ink-faint);
  font-size: 0.72rem;
}

.article-column {
  min-width: 0;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 3rem;
  color: var(--ink-faint);
  font-size: 0.7rem;
}

.breadcrumbs a {
  font-weight: 750;
}

.breadcrumbs span[aria-current] {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-header {
  margin-bottom: 4rem;
  padding-bottom: 2.4rem;
  border-bottom: 1px solid var(--line-strong);
}

.article-kicker {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.11em;
}

.article-kicker span + span::before {
  margin-right: 0.65rem;
  color: var(--line-strong);
  content: "/";
}

.article-header h1 {
  margin: 0.85rem 0 0;
  font-family: var(--serif);
  font-size: clamp(2.45rem, 5.3vw, 4.65rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

.original-title {
  margin: 0.85rem 0 0;
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 1rem;
  font-style: italic;
  line-height: 1.45;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  margin-top: 1.8rem;
  gap: 0.55rem 1.25rem;
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.article-byline a {
  font-weight: 700;
}

.article-byline .separator {
  color: var(--line-strong);
}

.article-scope {
  margin: 1.25rem 0 0;
  padding: 0.75rem 0.9rem;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
  background: rgb(255 253 248 / 55%);
  font-size: 0.76rem;
}

.wiki-body {
  color: #2f302b;
  font-family: var(--serif);
  font-size: clamp(1.01rem, 1.4vw, 1.1rem);
  line-height: 2;
  overflow-wrap: break-word;
}

.wiki-body > :first-child {
  margin-top: 0;
}

.wiki-body > :last-child {
  margin-bottom: 0;
}

.wiki-body p,
.wiki-body ul,
.wiki-body ol,
.wiki-body blockquote,
.wiki-body pre,
.wiki-body table {
  margin-top: 1.4em;
  margin-bottom: 1.4em;
}

.wiki-body h2,
.wiki-body h3,
.wiki-body h4 {
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 650;
  line-height: 1.45;
}

.wiki-body h2 {
  margin: 3.4em 0 1.05em;
  padding-top: 0.55em;
  border-top: 1px solid var(--line-strong);
  font-size: 1.65em;
  letter-spacing: -0.025em;
}

.wiki-body h3 {
  margin: 2.6em 0 0.85em;
  font-size: 1.28em;
}

.wiki-body h4 {
  margin: 2.1em 0 0.7em;
  font-size: 1.08em;
}

.wiki-body a {
  color: var(--accent-dark);
  font-weight: 600;
}

.wiki-body a[data-local-wiki-link="true"]::after {
  margin-left: 0.15em;
  color: var(--accent);
  content: "◆";
  font-family: var(--sans);
  font-size: 0.42em;
  vertical-align: super;
}

.wiki-body blockquote {
  margin-right: 0;
  margin-left: 0;
  padding: 0.4em 0 0.4em 1.3em;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
  font-style: italic;
}

.wiki-body li + li {
  margin-top: 0.35em;
}

.wiki-body code {
  padding: 0.12em 0.35em;
  border: 1px solid var(--line);
  border-radius: 0.2em;
  background: var(--surface-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82em;
}

.wiki-body pre {
  max-width: 100%;
  padding: 1rem 1.1rem;
  overflow: auto;
  border: 1px solid var(--line-strong);
  background: #ece7dc;
  line-height: 1.7;
}

.wiki-body pre code {
  padding: 0;
  border: 0;
  background: transparent;
}

.wiki-body table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.82rem;
  line-height: 1.55;
}

.wiki-body th,
.wiki-body td {
  min-width: 8rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.wiki-body th {
  background: var(--paper-deep);
}

.wiki-body hr {
  width: 6rem;
  margin: 3.5rem auto;
  border: 0;
  border-top: 1px solid var(--line-strong);
}

.page-rail {
  color: var(--ink-soft);
  font-size: 0.73rem;
}

.rail-card {
  padding: 1rem 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.rail-card + .rail-card {
  margin-top: 1.4rem;
}

.rail-card > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.rail-card > a:last-child {
  border-bottom: 0;
}

.page-facts dl,
.page-facts div {
  margin: 0;
}

.page-facts div {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  gap: 1rem;
}

.page-facts div:last-child {
  border: 0;
}

.page-facts dt {
  color: var(--ink-faint);
}

.page-facts dd {
  margin: 0;
  font-weight: 700;
}

.rail-footnote {
  margin: 1rem 0 0;
  color: var(--ink-faint);
  line-height: 1.65;
}

.wiki-only-note {
  display: flex;
  align-items: center;
  margin-top: 5rem;
  padding: 1.25rem 1.4rem;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  gap: 1rem;
}

.type-icon {
  display: grid;
  width: 2.7rem;
  height: 2.7rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--green);
  border-radius: 50%;
  color: var(--green);
  font: italic 1.1rem Georgia, serif;
}

.wiki-only-note strong {
  font-family: var(--serif);
}

.wiki-only-note p {
  margin: 0.2rem 0 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
}

.related-posts {
  margin-top: 6rem;
  padding-top: 2rem;
  border-top: 2px solid var(--ink);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
}

.section-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  font-weight: 550;
  letter-spacing: -0.035em;
  line-height: 1.25;
}

.section-heading > div > p:last-child {
  margin: 0.65rem 0 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
}

.sort-control {
  display: grid;
  gap: 0.3rem;
  color: var(--ink-faint);
  font-size: 0.65rem;
  font-weight: 700;
}

.sort-control select {
  min-width: 12.5rem;
  height: 2.7rem;
  padding: 0 2rem 0 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.2rem;
  background: var(--surface);
  font-size: 0.74rem;
}

.read-only-callout {
  margin: 1.5rem 0;
  padding: 0.7rem 0.85rem;
  border-left: 3px solid var(--green);
  color: var(--ink-soft);
  background: rgb(73 101 91 / 7%);
  font-size: 0.7rem;
}

.related-post {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto;
  align-items: start;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line-strong);
  gap: 1rem;
}

.post-score {
  padding-top: 0.14rem;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
}

.post-score span {
  margin-right: 0.2rem;
  font-size: 0.58rem;
}

.post-copy h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.45;
}

.post-copy h3 a {
  text-decoration: none;
}

.post-byline,
.post-metrics {
  margin: 0.38rem 0 0;
  color: var(--ink-faint);
  font-size: 0.67rem;
  line-height: 1.4;
}

.post-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
}

.post-open {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
}

.post-empty {
  padding: 2rem 0;
  color: var(--ink-faint);
  text-align: center;
}

.post-footer {
  justify-content: space-between;
}

.post-footer p {
  margin: 0;
  color: var(--ink-faint);
  font-size: 0.68rem;
}

.article-end-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-strong);
  gap: 1rem;
  font-size: 0.74rem;
  font-weight: 750;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 8rem;
  padding: 2rem max(1.5rem, calc((100% - 1180px) / 2));
  border-top: 1px solid var(--line-strong);
  color: var(--ink-faint);
  background: var(--paper-deep);
  gap: 2rem;
  font-size: 0.7rem;
}

.site-footer > div {
  display: grid;
  gap: 0.2rem;
}

.site-footer strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 0.9rem;
}

.site-footer a {
  font-weight: 750;
}

@media (max-width: 1120px) {
  .wiki-layout {
    grid-template-columns: 185px minmax(0, var(--content));
  }

  .page-rail {
    display: grid;
    grid-column: 2;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .page-rail > *:first-child {
    position: static;
  }

  .rail-card + .rail-card {
    margin-top: 0;
  }

  .rail-footnote {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  html {
    scroll-padding-top: 6rem;
  }

  .site-header-inner,
  .draft-notice-inner,
  .index-main,
  .wiki-layout {
    width: min(100% - 2rem, 720px);
  }

  .site-nav a:first-child {
    display: none;
  }

  .draft-notice-inner {
    align-items: flex-start;
    padding: 0.7rem 0;
    flex-wrap: wrap;
    gap: 0.35rem 0.8rem;
  }

  .draft-notice-inner > span:not(.status-dot) {
    flex: 1 1 65%;
  }

  .draft-notice a {
    margin-left: 0;
  }

  .index-main {
    padding-top: 3.5rem;
  }

  .index-hero {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 2rem;
  }

  .index-stat {
    width: auto;
    height: auto;
    grid-auto-flow: column;
    justify-content: start;
    border: 0;
    border-radius: 0;
    gap: 0.65rem;
  }

  .index-stat strong {
    font-size: 1.6rem;
  }

  .index-stat span {
    align-self: center;
    margin: 0;
  }

  .concept-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scope-note {
    grid-template-columns: auto 1fr;
  }

  .scope-note > a {
    grid-column: 2;
  }

  .wiki-layout {
    display: block;
    padding-top: 1.5rem;
  }

  .toc-rail {
    position: relative;
    z-index: 20;
    margin-bottom: 2.5rem;
  }

  .toc-toggle {
    display: flex;
    width: 100%;
    min-height: 2.85rem;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--line-strong);
    background: var(--surface-muted);
    font-size: 0.72rem;
    font-weight: 750;
  }

  .toc-toggle[aria-expanded="true"] span {
    transform: rotate(180deg);
  }

  .toc-panel {
    position: absolute;
    top: calc(100% - 1px);
    right: 0;
    left: 0;
    max-height: min(55vh, 28rem);
    padding: 1rem;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .toc-panel:not(.is-open) {
    display: none;
  }

  .toc-panel .rail-label {
    display: none;
  }

  .page-rail {
    display: grid;
    margin-top: 4rem;
  }
}

@media (max-width: 620px) {
  .site-header-inner {
    min-height: 3.75rem;
  }

  .brand {
    font-size: 0.78rem;
  }

  .brand-mark {
    width: 1.75rem;
    height: 1.75rem;
  }

  .site-nav {
    font-size: 0.7rem;
  }

  .draft-notice-inner > span:not(.status-dot) {
    flex-basis: 100%;
    order: 3;
  }

  .index-hero h1 {
    font-size: clamp(3rem, 17vw, 4.6rem);
  }

  .index-hero h1 em {
    display: block;
    margin-top: 0.6rem;
    font-size: 0.34em;
  }

  .index-controls {
    grid-template-columns: 1fr;
  }

  .clear-search {
    min-height: 2.6rem;
  }

  .concept-grid {
    grid-template-columns: 1fr;
  }

  .concept-card {
    min-height: 15.5rem;
  }

  .concept-preview {
    display: none;
  }

  .scope-note {
    grid-template-columns: 1fr;
  }

  .scope-note > div:first-child {
    display: none;
  }

  .scope-note > a {
    grid-column: 1;
  }

  .article-header {
    margin-bottom: 3rem;
  }

  .article-header h1 {
    font-size: clamp(2.25rem, 12vw, 3.45rem);
  }

  .article-byline {
    display: grid;
  }

  .wiki-body {
    font-size: 1rem;
    line-height: 1.9;
  }

  .wiki-body h2 {
    margin-top: 2.8em;
  }

  .section-heading {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 1rem;
  }

  .sort-control select {
    width: 100%;
  }

  .related-post {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }

  .post-open {
    display: none;
  }

  .post-footer {
    align-items: stretch;
    flex-direction: column;
    gap: 0.9rem;
  }

  .article-end-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-rail {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    min-height: 0;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
    gap: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  body {
    background: #fff;
  }

  .site-header,
  .draft-notice,
  .toc-rail,
  .page-rail,
  .related-posts,
  .article-end-nav,
  .site-footer {
    display: none !important;
  }

  .wiki-layout {
    display: block;
    width: auto;
    padding: 0;
  }

  .wiki-body a {
    color: inherit;
  }
}