/* article.css — loaded only on single article pages (.IsPage) */
/* ── ARTICLE: reading view ─────────────────────────────────── */
.reading-shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 56px;
  margin: 24px 0 0;
}

.reading-rail {
  position: sticky;
  top: 88px;
  align-self: start;
  display: grid;
  gap: 18px;
  padding: 24px 0;
  border-top: 2px solid var(--coal);
  border-bottom: 1px solid var(--rule);
}
.rail-back {
  display: grid;
  gap: 2px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  color: var(--coal);
}
.rail-back small {
  font-family: var(--display);
  font-weight: 800;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.rail-back strong {
  font-family: var(--display);
  font-weight: 900;
  font-size: 16px;
  line-height: 1.4;
  color: var(--coal);
  letter-spacing: 0;
}
.rail-back span {
  font-family: var(--sans);
  font-size: 11.5px;
  color: var(--coal-2);
  margin-top: 4px;
  font-weight: 600;
}
.rail-back:hover { color: var(--accent); }
.rail-back:hover strong { color: var(--accent); }

.rail-chapters {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.rail-chapters li {
  position: relative;
}
.rail-chapters a,
.rail-chapters span[aria-current="page"] {
  display: block;
  padding: 10px 0;
  border-bottom: 1px dashed var(--rule-soft);
  color: var(--coal-2);
  transition: color 0.2s, padding 0.2s;
}
.rail-chapters a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.rail-chapters .rail-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  line-height: 1.55;
}
.rail-chapters li.is-current {
  background: color-mix(in srgb, var(--accent) 8%, var(--paper));
  margin: 0 -10px;
  padding: 0 10px;
  border-left: 4px solid var(--accent);
}
.rail-chapters li.is-current span[aria-current="page"] {
  display: block;
  padding: 10px 0;
  color: var(--coal);
  border-bottom: none;
}
.rail-chapters li.is-current .rail-title {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  align-items: start;
  gap: 8px;
  font-weight: 800;
  color: var(--coal);
}
.rail-chapters li.is-current .rail-title::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 0.68em;
  border-radius: 50%;
  background: var(--accent);
}

/* デスクトップ: details toggle 非表示、章一覧を常時展開 */
.rail-toc { display: contents; }
.rail-toc-toggle { display: none; }
.rail-toc .rail-chapters { display: grid; }

.reading-main { min-width: 0; }
.reading-head {
  padding: 24px 0 24px;
  border-top: 2px solid var(--coal);
  display: grid;
  gap: 10px;
}
.reading-serial {
  margin: 0;
  font-family: var(--display);
  font-weight: 900;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.reading-serial span {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 11.5px;
  color: var(--coal-2);
  letter-spacing: 0.06em;
  margin-left: 8px;
}
.reading-theme {
  margin: 0;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--coal-2);
  letter-spacing: 0.04em;
}
.reading-theme a {
  color: var(--coal);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--rule-soft);
}
.reading-theme a:hover { text-decoration-color: var(--accent); }
.reading-head h1 {
  margin: 4px 0 0;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--coal);
  max-width: 27ch;
}
.reading-meta {
  list-style: none;
  margin: 12px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--rule-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--coal);
}
.reading-meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-variant-numeric: tabular-nums;
}
.reading-meta span {
  font-family: var(--display);
  font-weight: 800;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.reading-summary {
  margin: 12px 0 0;
  padding: 13px 16px;
  background: var(--paper-2);
  border-left: 3px solid var(--accent);
}
.rs-tag {
  margin: 0 0 4px;
  font-family: var(--display);
  font-weight: 800;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.reading-summary p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--coal-2);
}

.prev-next-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 48px 0 22px;
  border: 1px solid var(--rule);
  background: var(--rule);
}
.pn {
  display: grid;
  gap: 4px;
  padding: 18px 22px;
  background: var(--paper);
  color: var(--coal);
  transition: background 0.2s;
  min-height: 70px;
  align-content: center;
}
.pn:hover { background: var(--paper-2); }
.pn-next { text-align: right; }
.pn small {
  font-family: var(--display);
  font-weight: 800;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.pn strong {
  font-family: var(--display);
  font-weight: 800;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--coal);
  letter-spacing: 0;
}
.pn.disabled { opacity: 0.35; background: var(--paper-2); }

.article-foot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 22px 0 48px;
  border-top: 1px solid var(--rule);
}
.foot-back, .foot-home {
  font-family: var(--display);
  font-weight: 800;
  font-size: 13px;
  color: var(--coal);
  letter-spacing: 0.02em;
  text-decoration: underline;
  text-underline-offset: 5px;
  text-decoration-color: var(--accent);
  transition: color 0.2s, text-decoration-thickness 0.2s;
}
.foot-back:hover, .foot-home:hover {
  color: var(--accent);
  text-decoration-thickness: 2px;
}

/* ── PROSE: markdown body styling within .article-prose ───── */
.article-prose {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.95;
  color: var(--coal-2);
  font-weight: 400;
  font-feature-settings: 'palt' 1, 'kern' 1;
}
.article-prose > p {
  margin: 0 0 1.45em;
  max-width: none;
}
.article-prose h2 + p {
  margin-top: 0.15em;
}
/* drop-cap removed per design feedback */
.article-prose h2 {
  margin: 1.35em 0 0.5em;
  padding: 10px 0 6px;
  border-top: 1px solid var(--coal);
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1.4;
  letter-spacing: 0;
  color: var(--coal);
  position: relative;
}
.article-prose h3 {
  margin: 1.75em 0 0.55em;
  padding: 0 0 6px;
  border-bottom: 2px solid var(--accent);
  background: transparent !important; /* override legacy */
  border-left: none !important;       /* override legacy */
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.45;
  letter-spacing: 0;
  color: var(--coal);
  border-radius: 0 !important;
  display: inline-block;
}
.article-prose h4 {
  margin: 1.45em 0 0.35em;
  font-family: var(--display);
  font-weight: 800;
  font-size: 15px;
  color: var(--coal);
}
.article-prose ul, .article-prose ol {
  margin: 0 0 1.25em;
  padding-left: 1.4em;
  max-width: 64ch;
}
.article-prose ul li, .article-prose ol li {
  margin: 0.3em 0;
  line-height: 1.85;
  font-size: 14.5px;
}
.article-prose ul li::marker { color: var(--accent); }
.article-prose ol li::marker {
  color: var(--accent);
  font-family: var(--display);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.article-prose a {
  color: var(--coal);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent);
  transition: color 0.2s, text-decoration-thickness 0.2s;
}
.article-prose a:hover {
  color: var(--accent);
  text-decoration-thickness: 2px;
}
.article-prose strong, .article-prose b { color: var(--coal); font-weight: 800; }
.article-prose em { font-style: italic; color: var(--coal); }
.article-prose blockquote {
  margin: 1.35em 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--accent);
  font-style: italic;
  color: var(--coal);
  max-width: 60ch;
}
.article-prose .diagram-figure {
  margin: 1.35em 0 1.65em;
  padding: 14px;
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  background: var(--paper);
}
.article-prose .diagram-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.article-prose .diagram-figure figcaption {
  margin: 10px 2px 0;
  color: #5c5c64;
  font-size: 12.5px;
  line-height: 1.65;
}
.article-prose .highlight,
.article-prose pre {
  max-width: 100%;
  overflow-x: auto;
}
.article-prose .highlight {
  position: relative;
  margin: 1.2em 0 1.45em;
  padding: 18px 18px 16px;
  background: var(--paper-2);
  border: 1px solid var(--rule-soft);
  border-left: 4px solid var(--accent);
}
.article-prose .highlight.is-ok {
  border-left-color: var(--ok);
}
.article-prose .highlight.is-ng {
  border-left-color: var(--ng);
}
.article-prose .highlight.is-ok,
.article-prose .highlight.is-ng {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  padding: 14px 16px;
}
.article-prose .highlight .example-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 22px;
  margin: 3px 0 0;
  padding: 0 8px;
  border-radius: 2px;
  background: var(--accent);
  color: var(--paper);
  font-family: var(--display);
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.08em;
}
.article-prose .highlight.is-ok .example-label {
  background: var(--ok);
}
.article-prose .highlight.is-ng .example-label {
  background: var(--ng);
}
.article-prose pre {
  min-width: 0;
  margin: 0 !important;
  padding: 0 !important;
  background: transparent !important;
  color: var(--coal) !important;
  white-space: pre-wrap;
  word-break: break-word;
}
.article-prose .highlight span {
  min-width: 0;
}
.article-prose .okng-table-wrap {
  margin: 1.25em 0 1.5em;
  overflow-x: auto;
  border: 1px solid var(--rule-soft);
  background: var(--paper);
}
.article-prose .okng-caption {
  margin: 0;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule-soft);
  background: var(--paper-2);
  color: var(--coal);
  font-family: var(--display);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: 0.02em;
}
.article-prose .okng-table {
  width: 100%;
  min-width: 560px;
  margin: 0;
  border-collapse: collapse;
  table-layout: fixed;
  font-family: var(--sans);
  font-size: 13.5px;
}
.article-prose .okng-table th,
.article-prose .okng-table td {
  padding: 12px 14px;
  border: 0;
  border-right: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
  text-align: left;
  vertical-align: top;
  line-height: 1.75;
  overflow-wrap: break-word;
}
.article-prose .okng-table thead th {
  background: var(--paper-3);
  color: var(--coal);
  font-family: var(--display);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.06em;
}
.article-prose .okng-table thead th.is-ng {
  background: color-mix(in srgb, var(--ng) 13%, var(--paper));
  color: var(--ng);
}
.article-prose .okng-table thead th.is-ok {
  background: color-mix(in srgb, var(--ok) 13%, var(--paper));
  color: var(--ok);
}
.article-prose .okng-table tbody th {
  width: 14%;
  background: var(--paper-2);
  color: var(--coal);
  font-weight: 800;
}
.article-prose .okng-table thead th:first-child {
  width: 14%;
}
.article-prose .okng-table thead th.is-ng,
.article-prose .okng-table thead th.is-ok,
.article-prose .okng-table td.is-ng,
.article-prose .okng-table td.is-ok {
  width: 43%;
}
.article-prose .okng-table td.is-ng {
  color: var(--coal);
  background: color-mix(in srgb, var(--ng) 4%, var(--paper));
}
.article-prose .okng-table td.is-ok {
  color: var(--coal);
  background: color-mix(in srgb, var(--ok) 4%, var(--paper));
}
.article-prose .okng-table td:last-child,
.article-prose .okng-table th:last-child {
  border-right: 0;
}
.article-prose .okng-table tbody tr:last-child th,
.article-prose .okng-table tbody tr:last-child td {
  border-bottom: 0;
}
.article-prose .okng-table p {
  margin: 0;
}
.article-prose table {
  width: 100%;
  margin: 1.25em 0 1.55em;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 13.5px;
}
.article-prose table thead {
  border-top: 2px solid var(--coal);
  border-bottom: 1px solid var(--coal);
  background: transparent;
}
.article-prose table th {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--display);
  font-weight: 900;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--coal);
  background: var(--paper-2);
  border-right: 1px solid var(--rule-soft);
}
.article-prose table th:last-child { border-right: none; }
.article-prose table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule-soft);
  border-right: 1px solid var(--rule-soft);
  color: var(--coal-2);
  vertical-align: top;
  line-height: 1.7;
}
.article-prose table td:last-child { border-right: none; }
.article-prose table tbody tr:last-child td {
  border-bottom: 2px solid var(--coal);
}

.article-prose .topic-tables-wrap {
  margin: 1.3em 0 1.6em;
}
.article-prose .topic-tables-caption {
  margin: 0 0 10px;
  color: var(--coal);
  font-family: var(--display);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: 0.02em;
}
.article-prose .topic-table-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: start;
}
.article-prose .topic-table-panel {
  border: 1px solid var(--rule-soft);
  background: var(--paper);
}
.article-prose .topic-table-title {
  margin: 0;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule-soft);
  font-family: var(--display);
  font-size: 12px;
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: 0.06em;
}
.article-prose .topic-table-panel.is-avoid .topic-table-title {
  color: var(--ng);
  background: color-mix(in srgb, var(--ng) 7%, var(--paper));
}
.article-prose .topic-table-panel.is-safe .topic-table-title {
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 7%, var(--paper));
}
.article-prose .topic-table {
  display: block;
  width: 100%;
  min-width: 0;
  margin: 0;
  font-family: var(--sans);
  font-size: 13px;
}
.article-prose .topic-table thead {
  display: none;
}
.article-prose .topic-table tbody,
.article-prose .topic-table tr,
.article-prose .topic-table th,
.article-prose .topic-table td {
  display: block;
}
.article-prose .topic-table tr {
  border-bottom: 1px solid var(--rule-soft);
  padding: 12px;
}
.article-prose .topic-table tr:last-child {
  border-bottom: 0;
}
.article-prose .topic-table tbody th,
.article-prose .topic-table tbody td {
  width: auto;
  padding: 0;
  border: 0;
  text-align: left;
  line-height: 1.65;
}
.article-prose .topic-table tbody th {
  color: var(--coal);
  font-weight: 800;
  font-size: 13.5px;
}
.article-prose .topic-table td {
  margin-top: 7px;
  color: var(--coal-2);
}
.article-prose .topic-table p {
  margin: 0;
}
.article-prose .topic-table td::before {
  content: attr(data-label);
  display: block;
  margin-bottom: 2px;
  color: var(--muted);
  font-family: var(--display);
  font-size: 10.5px;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

/* prose cards (used by articlecard shortcodes within article-prose) */
.prose-cards {
  display: grid;
  gap: 0;
  margin: 1.25em 0 1.55em;
  border-top: 1px solid var(--rule);
}
.prose-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--rule);
  border-left: 3px solid transparent;
  color: var(--coal);
  transition: background 0.2s, border-color 0.2s, padding 0.2s;
}
.prose-card:hover {
  background: var(--paper-2);
  border-left-color: var(--accent);
  padding-left: 20px;
}
.prose-card:hover .pc-arrow { transform: translateX(4px); }
.pc-body { display: grid; gap: 4px; min-width: 0; }
.pc-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--coal);
  letter-spacing: 0;
}
.pc-desc {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--coal-2);
}
.pc-arrow {
  font-family: var(--display);
  font-weight: 900;
  font-size: 18px;
  color: var(--accent);
  transition: transform 0.2s;
}

/* normalize legacy in-prose components on paper bg */
.article-prose .compare-table-wrap {
  margin: 1.35em 0;
  border: 1px solid var(--coal);
  border-radius: 0;
}
.article-prose .compare-table thead { background: var(--coal); }
.article-prose .compare-table th { border-right-color: rgba(247, 244, 236, 0.2); }
.article-prose .compare-table th.t-ok { background: var(--ok); color: var(--paper); }
.article-prose .compare-table th.t-ng { background: var(--ng); color: var(--paper); }
.article-prose .compare-table td { background: var(--paper); border-bottom-color: var(--rule); border-right-color: var(--rule); }
.article-prose .compare-table td:first-child { background: var(--paper-2); }


body.page-article .reading-shell {
  margin-top: 16px;
}

body.page-article .reading-head {
  padding: 18px 0 20px;
}

.prev-next-nav.is-single {
  grid-template-columns: minmax(0, 1fr);
}

.prev-next-nav.is-single .pn {
  min-height: 78px;
}

.article-prose .prose-cards {
  gap: 12px;
  border-top: 0;
  margin: 1.35em 0 1.7em;
}

.article-prose .prose-card {
  background: #fff;
  border: 1px solid var(--rule-soft);
  border-left: 5px solid color-mix(in srgb, var(--accent) 72%, var(--rule-soft));
  border-radius: 8px;
  margin: 0 0 14px;
  padding: 16px 18px;
  box-shadow: 0 10px 26px rgba(24, 24, 27, 0.06);
}

.article-prose .prose-card:hover {
  background: var(--paper-2);
  border-left-color: var(--accent);
  padding-left: 22px;
}

.pc-label {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  padding: 2px 8px;
  background: var(--accent-tint);
  color: var(--accent);
  border-radius: 999px;
  font-family: var(--display);
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.article-prose .pc-title {
  font-size: 16px;
}

.article-prose .pc-arrow {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--paper);
}

.auto-related {
  margin: 34px 0 26px;
}
.auto-related + .auto-related {
  margin-top: 24px;
}
.auto-related h2 {
  margin: 0 0 13px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--rule);
  color: var(--coal);
  font-family: var(--display);
  font-size: 18px;
  font-weight: 900;
  line-height: 1.45;
  letter-spacing: 0;
}
.auto-related .prose-cards {
  display: grid;
  gap: 12px;
  margin: 0;
  border-top: 0;
}
.auto-related .prose-card {
  background: #fff;
  border: 1px solid var(--rule-soft);
  border-left: 5px solid color-mix(in srgb, var(--accent) 72%, var(--rule-soft));
  border-radius: 8px;
  margin: 0;
  padding: 16px 18px;
  box-shadow: 0 10px 26px rgba(24, 24, 27, 0.06);
}
.auto-related .prose-card:hover {
  background: var(--paper-2);
  border-left-color: var(--accent);
  padding-left: 22px;
}
.auto-related .pc-title {
  font-size: 16px;
}
.auto-related .pc-arrow {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--paper);
}