/* ============================================================
   江戸大全 — design tokens
   方向性: 和のエディトリアル。生成り(washi) × 墨 × 藍 × 朱。
   ============================================================ */
:root {
  --washi: #f6f1e6;
  --washi-deep: #ede4d0;
  --washi-card: #faf6ee;
  --sumi: #221c16;
  --sumi-soft: #5a5044;
  --ai: #24486e;
  --ai-deep: #1a3450;
  --shu: #b5443c;
  --shu-deep: #93332d;
  --karashi: #a8842c;
  --line: rgba(34, 28, 22, 0.16);
  --line-strong: rgba(34, 28, 22, 0.34);

  --font-mincho: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-gothic: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;

  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lead: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  --text-h2: clamp(1.75rem, 1.4rem + 1.6vw, 2.75rem);
  --text-hero: clamp(2.6rem, 1.6rem + 5vw, 5.4rem);

  --space-section: clamp(4.5rem, 3rem + 5vw, 9rem);
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --maxw: 1120px;

  --duration-fast: 160ms;
  --duration-normal: 420ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-gothic);
  font-size: var(--text-base);
  line-height: 1.9;
  color: var(--sumi);
  background-color: var(--washi);
  /* 和紙の繊維感: 細かなノイズを重ねる */
  background-image:
    radial-gradient(rgba(34, 28, 22, 0.028) 1px, transparent 1px),
    radial-gradient(rgba(34, 28, 22, 0.02) 1px, transparent 1px);
  background-size: 7px 7px, 11px 11px;
  background-position: 0 0, 3px 5px;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--ai); text-decoration: none; }
a:hover { color: var(--shu); }
a:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--shu);
  outline-offset: 3px;
}

.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--washi) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--sumi);
}
.brand:hover { color: var(--sumi); }
.brand-seal {
  width: 2.4rem;
  height: 2.4rem;
  background: var(--shu);
  color: var(--washi-card);
  font-family: var(--font-mincho);
  font-weight: 700;
  font-size: 0.78rem;
  line-height: 1.15;
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--shu-deep);
  letter-spacing: 0.08em;
}
.brand-name {
  font-family: var(--font-mincho);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.14em;
}
.brand-sub {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--sumi-soft);
  display: block;
  line-height: 1.2;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: clamp(0.9rem, 2.5vw, 1.8rem);
  font-size: 0.86rem;
  letter-spacing: 0.12em;
}
.site-nav a {
  color: var(--sumi-soft);
  padding-block: 0.3rem;
  border-bottom: 2px solid transparent;
  transition: color var(--duration-fast), border-color var(--duration-fast);
}
.site-nav a:hover { color: var(--shu); border-bottom-color: var(--shu); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero .container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  padding-block: clamp(4rem, 8vw, 8rem);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--ai);
  border: 1px solid currentColor;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1.6rem;
}
.hero-lead {
  font-size: var(--text-lead);
  max-width: 34em;
  color: var(--sumi-soft);
  margin-bottom: 1.2rem;
}
.hero-lead strong { color: var(--sumi); font-weight: 700; }
.hero-note {
  font-size: 0.8rem;
  color: var(--sumi-soft);
  letter-spacing: 0.06em;
  margin-bottom: 2.2rem;
}
.hero-title {
  font-family: var(--font-mincho);
  font-weight: 800;
  font-size: var(--text-hero);
  line-height: 1.28;
  letter-spacing: 0.1em;
  writing-mode: vertical-rl;
  max-height: 11.5em;
  color: var(--sumi);
}
.hero-title .accent { color: var(--shu); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mincho);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  padding: 0.85rem 1.7rem;
  border-radius: 3px;
  border: 1px solid var(--sumi);
  transition: transform var(--duration-fast) var(--ease-out-expo),
              background-color var(--duration-fast),
              color var(--duration-fast);
}
.btn-primary { background: var(--sumi); color: var(--washi); }
.btn-primary:hover { background: var(--shu); border-color: var(--shu); color: var(--washi); transform: translateY(-2px); }
.btn-ghost { color: var(--sumi); background: transparent; }
.btn-ghost:hover { color: var(--shu); border-color: var(--shu); transform: translateY(-2px); }

/* ---------- sections ---------- */
.section { padding-block: var(--space-section); }
.section-alt { background: var(--washi-deep); border-block: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
  flex-wrap: wrap;
  margin-bottom: clamp(2rem, 4vw, 3.4rem);
}
.section-num {
  font-family: var(--font-mincho);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--shu);
  border-bottom: 2px solid var(--shu);
  padding-bottom: 0.2rem;
}
.section-title {
  font-family: var(--font-mincho);
  font-weight: 700;
  font-size: var(--text-h2);
  letter-spacing: 0.08em;
  line-height: 1.4;
}
.section-desc {
  max-width: 40em;
  color: var(--sumi-soft);
  margin-top: -1.4rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

/* ---------- lenses (四つの窓) ---------- */
.lens-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (max-width: 1020px) {
  .lens-grid { grid-template-columns: repeat(2, 1fr); }
  .lens-card:last-child { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .lens-grid { grid-template-columns: 1fr; }
}
.lens-card {
  background: var(--washi-card);
  padding: 1.8rem 1.5rem;
  position: relative;
}
.lens-card::before {
  content: attr(data-index);
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  font-family: var(--font-mincho);
  font-size: 0.8rem;
  color: var(--karashi);
  letter-spacing: 0.2em;
}
.lens-kanji {
  font-family: var(--font-mincho);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--ai);
  line-height: 1;
  margin-bottom: 0.9rem;
}
.lens-card h3 {
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.lens-card p { font-size: 0.88rem; color: var(--sumi-soft); line-height: 1.8; }

/* ---------- category bento (八つの間口) ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(150px, auto);
  gap: 0.9rem;
}
.cat-tile {
  position: relative;
  background: var(--washi-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.4rem 1.3rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 150px;
  color: var(--sumi);
  transition: transform var(--duration-fast) var(--ease-out-expo),
              border-color var(--duration-fast),
              box-shadow var(--duration-fast);
}
.cat-tile:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 14px 30px -18px rgba(34, 28, 22, 0.45);
  color: var(--sumi);
}
.cat-tile .cat-kanji {
  position: absolute;
  top: -0.35em;
  right: 0.05em;
  font-family: var(--font-mincho);
  font-weight: 800;
  font-size: clamp(4rem, 7vw, 6.5rem);
  line-height: 1;
  color: rgba(36, 72, 110, 0.1);
  pointer-events: none;
  transition: color var(--duration-normal);
}
.cat-tile:hover .cat-kanji { color: rgba(181, 68, 60, 0.16); }
.cat-tile h3 {
  font-family: var(--font-mincho);
  font-size: 1.15rem;
  letter-spacing: 0.14em;
  margin-bottom: 0.35rem;
}
.cat-tile .cat-en {
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--karashi);
  margin-bottom: 0.6rem;
}
.cat-tile p { font-size: 0.8rem; color: var(--sumi-soft); line-height: 1.75; }
.cat-tile.is-wide { grid-column: span 2; }
.cat-tile.is-tall { grid-row: span 2; justify-content: space-between; padding-top: 1.6rem; }
.cat-tile.is-tall .cat-lede {
  font-family: var(--font-mincho);
  font-size: 0.95rem;
  color: var(--sumi);
  writing-mode: vertical-rl;
  letter-spacing: 0.18em;
  line-height: 2;
  max-height: 13em;
  align-self: flex-end;
}

/* ---------- featured entry ---------- */
.feature-wrap {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: stretch;
}
.feature-label {
  font-family: var(--font-mincho);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
  letter-spacing: 0.22em;
  writing-mode: vertical-rl;
  color: var(--ai);
  border-left: 1px solid var(--line);
  padding-left: clamp(0.8rem, 2vw, 1.6rem);
  align-self: start;
}
.feature-card {
  background: var(--washi-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 24px 50px -30px rgba(34, 28, 22, 0.4);
}
.feature-head {
  background: var(--ai-deep);
  color: var(--washi);
  padding: 1.8rem 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.8rem 1.4rem;
}
.feature-head h3 {
  font-family: var(--font-mincho);
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  letter-spacing: 0.1em;
}
.price-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  background: var(--shu);
  color: var(--washi);
  font-family: var(--font-mincho);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
}
.price-chip strong { font-size: 1.05rem; }
.feature-body { padding: 1.8rem 2rem; }
.feature-body > p { color: var(--sumi-soft); margin-bottom: 1.6rem; max-width: 44em; }
.feature-lens-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem 1.6rem; margin-bottom: 1.8rem; }
.feature-lens-list li { font-size: 0.88rem; line-height: 1.75; padding-left: 1.5rem; position: relative; }
.feature-lens-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--shu);
  border-radius: 1px;
  transform: rotate(45deg);
}
.feature-lens-list b { font-family: var(--font-mincho); letter-spacing: 0.08em; }

/* ---------- converter ---------- */
.converter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  background: var(--sumi);
  color: var(--washi);
  border-radius: 10px;
  padding: clamp(1.8rem, 4vw, 3.2rem);
}
.converter h3 {
  font-family: var(--font-mincho);
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  letter-spacing: 0.1em;
  margin-bottom: 0.7rem;
}
.converter p { font-size: 0.85rem; color: rgba(246, 241, 230, 0.72); }
.converter-panel { background: rgba(246, 241, 230, 0.07); border: 1px solid rgba(246, 241, 230, 0.2); border-radius: 8px; padding: 1.5rem; }
.converter-panel label { display: block; font-size: 0.78rem; letter-spacing: 0.2em; margin-bottom: 0.5rem; color: rgba(246, 241, 230, 0.75); }
.converter-panel select {
  width: 100%;
  font-family: var(--font-gothic);
  font-size: 1rem;
  padding: 0.7rem 0.9rem;
  border-radius: 5px;
  border: 1px solid rgba(246, 241, 230, 0.35);
  background: var(--washi);
  color: var(--sumi);
  margin-bottom: 1.2rem;
}
.converter-result { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.converter-result .mon { font-family: var(--font-mincho); font-size: 1.1rem; color: var(--karashi); }
.converter-result .yen {
  font-family: var(--font-mincho);
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--washi);
  line-height: 1.1;
}
.converter-note { font-size: 0.72rem; color: rgba(246, 241, 230, 0.55); margin-top: 0.8rem; }
.converter a { color: #d9b96c; text-decoration: underline; }
.converter a:hover { color: #f0d79a; }

/* ---------- graph ---------- */
.graph-wrap {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}
.graph-svg-box {
  background: var(--washi-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}
.graph-copy p { color: var(--sumi-soft); margin-bottom: 1rem; }
.graph-copy p b { color: var(--sumi); }

/* ---------- timeline ---------- */
.timeline-scroll { overflow-x: auto; padding-bottom: 0.8rem; }
.timeline {
  display: flex;
  gap: 0;
  min-width: 900px;
  border-top: 2px solid var(--line-strong);
  padding-top: 1.4rem;
  margin-top: 0.5rem;
}
.timeline li { list-style: none; flex: 1; position: relative; padding-right: 1.2rem; }
.timeline li::before {
  content: "";
  position: absolute;
  top: calc(-1.4rem - 6px);
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--shu);
  border: 2px solid var(--washi);
}
.timeline .tl-year { font-family: var(--font-mincho); font-weight: 700; font-size: 1.05rem; color: var(--ai); letter-spacing: 0.05em; }
.timeline .tl-label { display: block; font-size: 0.8rem; color: var(--sumi-soft); line-height: 1.7; margin-top: 0.2rem; }
.timeline .tl-world {
  display: block;
  font-size: 0.72rem;
  color: var(--ai);
  line-height: 1.6;
  margin-top: 0.45rem;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--line);
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--washi-deep);
  padding-block: 2.4rem;
  font-size: 0.8rem;
  color: var(--sumi-soft);
}
.site-footer .container { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; }

/* ---------- entry page (記事) ---------- */
.entry-hero { border-bottom: 1px solid var(--line); background: var(--washi-deep); }
.entry-hero .container { padding-block: clamp(3rem, 6vw, 5.5rem); }
.breadcrumb { font-size: 0.78rem; letter-spacing: 0.1em; color: var(--sumi-soft); margin-bottom: 1.6rem; }
.breadcrumb a { color: var(--ai); }
.entry-cat {
  display: inline-block;
  font-family: var(--font-mincho);
  font-size: 0.8rem;
  letter-spacing: 0.26em;
  color: var(--washi);
  background: var(--ai);
  padding: 0.3rem 1rem;
  border-radius: 2px;
  margin-bottom: 1.2rem;
}
.entry-title {
  font-family: var(--font-mincho);
  font-weight: 800;
  font-size: clamp(1.9rem, 1.3rem + 3vw, 3.4rem);
  letter-spacing: 0.06em;
  line-height: 1.45;
  margin-bottom: 1rem;
}
.entry-title .sub { display: block; font-size: 0.5em; font-weight: 600; color: var(--sumi-soft); letter-spacing: 0.14em; margin-top: 0.5rem; }
.entry-meta { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.4rem; }
.meta-chip {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  background: var(--washi-card);
}
.meta-chip b { font-family: var(--font-mincho); color: var(--shu); }

.entry-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: var(--space-section);
}
.entry-body { max-width: 46em; }
.entry-body > p { margin-bottom: 1.4rem; }
.entry-body .lead { font-size: var(--text-lead); font-family: var(--font-mincho); line-height: 2; color: var(--sumi); }

.lens-section { margin-top: clamp(2.8rem, 5vw, 4rem); }
.lens-heading {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--font-mincho);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  letter-spacing: 0.1em;
  margin-bottom: 1.2rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}
.lens-heading .mark {
  flex: none;
  width: 2.2rem;
  height: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ai);
  color: var(--washi);
  font-size: 1rem;
  border-radius: 3px;
}
.lens-section:nth-of-type(even) .lens-heading .mark { background: var(--shu); }
.lens-section p { margin-bottom: 1.2rem; }
.lens-section ul { margin: 0 0 1.2rem 1.4em; }
.lens-section li { margin-bottom: 0.5rem; }

.pull-fact {
  border-left: 3px solid var(--shu);
  background: var(--washi-card);
  padding: 1.2rem 1.5rem;
  margin: 1.6rem 0;
  font-size: 0.9rem;
}
.pull-fact b { font-family: var(--font-mincho); color: var(--shu); }

.entry-aside { font-size: 0.85rem; }
.aside-block { border: 1px solid var(--line); border-radius: 6px; background: var(--washi-card); padding: 1.3rem 1.2rem; margin-bottom: 1.4rem; }
.aside-block h4 {
  font-family: var(--font-mincho);
  font-size: 0.92rem;
  letter-spacing: 0.16em;
  margin-bottom: 0.9rem;
  color: var(--ai);
}
.aside-block dl { display: grid; grid-template-columns: auto 1fr; gap: 0.4rem 0.9rem; }
.aside-block dt { color: var(--sumi-soft); }
.aside-block dd { font-family: var(--font-mincho); }
.related-list { list-style: none; }
.related-list li { border-bottom: 1px dashed var(--line); }
.related-list li:last-child { border-bottom: none; }
.related-list a { display: flex; justify-content: space-between; gap: 0.6rem; padding: 0.55rem 0.1rem; color: var(--sumi); }
.related-list a:hover { color: var(--shu); }
.related-list .tag { font-size: 0.7rem; color: var(--karashi); letter-spacing: 0.1em; flex: none; }

/* ---------- figures (図版) ---------- */
.entry-figure { margin: 1.8rem 0 2.2rem; }
.entry-figure img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--washi-card);
}
.entry-figure figcaption {
  font-size: 0.78rem;
  color: var(--sumi-soft);
  margin-top: 0.6rem;
  line-height: 1.75;
}
.entry-figure figcaption a { color: var(--ai); }
.figure-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--washi-card);
}
.figure-scroll img {
  height: 300px;
  width: auto;
  max-width: none;
  border: none;
  border-radius: 0;
}
.figure-scroll-hint {
  font-size: 0.72rem;
  color: var(--karashi);
  letter-spacing: 0.12em;
  margin-top: 0.4rem;
}
.figure-scroll--tall img { height: 520px; }
@media (max-width: 768px) {
  .figure-scroll--tall img { height: 380px; }
}

/* ---------- glossary (用語集) ---------- */
.term-group-title {
  font-family: var(--font-mincho);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: 0.12em;
  margin: clamp(2.2rem, 4vw, 3.2rem) 0 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
}
.term-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 0.9rem;
}
.term-card {
  background: var(--washi-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.1rem 1.2rem;
  font-size: 0.86rem;
}
.term-card dt {
  font-family: var(--font-mincho);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}
.term-card dt .yomi {
  font-family: var(--font-gothic);
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--karashi);
  margin-left: 0.5em;
  letter-spacing: 0.15em;
}
.term-card dt .conf { font-size: 0.78rem; color: var(--shu); margin-left: 0.4em; }
.term-card dd { color: var(--sumi-soft); line-height: 1.8; }
.term-card dd a { font-size: 0.8rem; }
.term-card dd .ima {
  display: block;
  margin-top: 0.55rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--line);
  font-size: 0.8rem;
  color: var(--ai);
}

/* ---------- 詳細年表 ---------- */
.nenpyo-scroll { overflow-x: auto; }
.nenpyo-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 0.86rem;
  background: var(--washi-card);
  border: 1px solid var(--line);
}
.nenpyo-table th {
  font-family: var(--font-mincho);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-align: left;
  padding: 0.7rem 1rem;
  background: var(--washi-deep);
  border-bottom: 2px solid var(--line-strong);
}
.nenpyo-table td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.75;
}
.nenpyo-table td.year {
  font-family: var(--font-mincho);
  font-weight: 700;
  color: var(--shu);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.nenpyo-table td.world { color: var(--ai); font-size: 0.82rem; }
.nenpyo-table tr:last-child td { border-bottom: none; }

/* ---------- category hub pages ---------- */
.cat-hero-glyph {
  position: absolute;
  top: 50%;
  right: var(--gutter);
  transform: translateY(-50%);
  font-family: var(--font-mincho);
  font-weight: 800;
  font-size: clamp(8rem, 18vw, 15rem);
  line-height: 1;
  color: rgba(36, 72, 110, 0.09);
  pointer-events: none;
}
.entry-hero .container { position: relative; }
.entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.entry-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--washi-card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.3rem 1.3rem 1.1rem;
  color: var(--sumi);
  transition: transform var(--duration-fast) var(--ease-out-expo),
              border-color var(--duration-fast),
              box-shadow var(--duration-fast);
}
a.entry-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 12px 26px -18px rgba(34, 28, 22, 0.45);
  color: var(--sumi);
}
.entry-card h3 {
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
}
.entry-card h3 .arrow { color: var(--shu); font-size: 0.85rem; }
.entry-card p { font-size: 0.82rem; color: var(--sumi-soft); line-height: 1.75; }
.entry-card .status {
  align-self: flex-start;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--karashi);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  margin-top: 0.3rem;
}
.entry-card.is-planned { opacity: 0.75; }
.cat-figure { margin-top: clamp(2rem, 4vw, 3rem); }

/* ---------- sources (出典・確度) ---------- */
.sources {
  margin-top: clamp(2.8rem, 5vw, 4rem);
  border-top: 2px solid var(--line-strong);
  padding-top: 1.6rem;
  font-size: 0.85rem;
}
.sources h2 {
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  letter-spacing: 0.16em;
  margin-bottom: 1rem;
}
.sources ol { margin-left: 1.5em; }
.sources li { margin-bottom: 0.7rem; line-height: 1.8; }
.sources .conf {
  font-family: var(--font-mincho);
  color: var(--shu);
  white-space: nowrap;
}
.sources .grade { color: var(--karashi); }
.sources-date {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: var(--sumi-soft);
  letter-spacing: 0.06em;
}

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--duration-normal) var(--ease-out-expo), transform var(--duration-normal) var(--ease-out-expo); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .cat-tile { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .converter { grid-template-columns: 1fr; }
  .graph-wrap { grid-template-columns: 1fr; }
  .entry-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-title {
    writing-mode: horizontal-tb;
    max-height: none;
    order: -1;
    margin-bottom: 1.6rem;
  }
  .site-nav { display: none; }
  .feature-wrap { grid-template-columns: 1fr; }
  .feature-label { writing-mode: horizontal-tb; border-left: none; border-bottom: 1px solid var(--line); padding-left: 0; padding-bottom: 0.6rem; }
}
@media (max-width: 560px) {
  .cat-grid { grid-template-columns: 1fr; }
  .cat-tile.is-wide { grid-column: span 1; }
  .cat-tile.is-tall { grid-row: span 1; }
  .cat-tile.is-tall .cat-lede { display: none; }
  .feature-head, .feature-body { padding: 1.3rem 1.2rem; }
}

/* ---------- 長屋の一日: 時刻表 ---------- */
.clock { display: grid; gap: .55rem; margin: 1.4rem 0; }
  .hour {
    display: grid; grid-template-columns: 5.6em 1fr; gap: .9rem;
    background: var(--washi-card); border: 1px solid var(--line);
    border-left: 3px solid var(--ai); border-radius: 0 8px 8px 0; padding: .8rem .9rem;
  }
  .hour.night { border-left-color: var(--sumi); }
  .hour.noon { border-left-color: var(--karashi); }
  .hour .h-t { font-family: var(--font-mincho); font-size: .95rem; letter-spacing: .04em; }
  .hour .h-t i { display: block; font-style: normal; font-size: .68rem; color: var(--sumi-soft); letter-spacing: .06em; }
  .hour .h-b { font-size: .88rem; line-height: 1.9; }
  @media (max-width: 560px) { .hour { grid-template-columns: 1fr; gap: .3rem; } }

/* ---------- 資料庫 ---------- */
.fact-filters { display: flex; gap: .45rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
  .fact-filters button {
    font-size: .78rem; letter-spacing: .08em; padding: .4rem .9rem; min-height: 40px;
    border: 1px solid var(--line-strong); border-radius: 999px; background: var(--washi-card); cursor: pointer;
  }
  .fact-filters button[aria-pressed="true"] { background: var(--sumi); color: var(--washi); border-color: var(--sumi); }
  .fact {
    background: var(--washi-card); border: 1px solid var(--line); border-radius: 8px;
    padding: 1rem 1.1rem; margin-bottom: .8rem;
  }
  .fact-head { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; margin-bottom: .5rem; }
  .fact-head h3 { font-family: var(--font-mincho); font-size: 1.05rem; letter-spacing: .06em; }
  .fact-date { font-size: .76rem; color: var(--karashi); font-family: var(--font-mincho); }
  .chip {
    font-size: .66rem; letter-spacing: .1em; padding: .12rem .5rem; border-radius: 4px; white-space: nowrap;
  }
  .chip.H3 { background: #dde7ef; color: var(--ai-deep); }
  .chip.H2 { background: #e6e2d3; color: #6b5a2b; }
  .chip.H1 { background: #efe3dd; color: var(--shu-deep); }
  .chip.F  { background: #e4e9e2; color: #3e5e4a; }
  .chip.confirmed { background: #dfe9df; color: #3e5e4a; }
  .chip.probable  { background: #e6e2d3; color: #6b5a2b; }
  .chip.disputed  { background: #efe3dd; color: var(--shu-deep); }
  .chip.legend    { background: #f0e4e2; color: #8f302a; }
  .fact p.stmt { font-size: .9rem; line-height: 1.95; margin-bottom: .7rem; }
  .fact-meta { font-size: .76rem; color: var(--sumi-soft); line-height: 1.9; }
  .fact-meta b { font-family: var(--font-mincho); color: var(--sumi); }
  .fact-src { margin: .4rem 0 0 1.2em; }
  .fact-src li { margin-bottom: .2rem; }
  .fact-rev {
    margin-top: .7rem; padding: .55rem .8rem; border-left: 3px solid var(--shu);
    background: #fdf3ea; border-radius: 0 6px 6px 0; font-size: .78rem; line-height: 1.85;
  }
  .fact-rev b { color: var(--shu-deep); font-family: var(--font-mincho); }
  .fact-used { margin-top: .5rem; display: flex; gap: .35rem; flex-wrap: wrap; }
  .fact-used a, .fact-used span {
    font-size: .7rem; padding: .15rem .55rem; border: 1px solid var(--line-strong);
    border-radius: 4px; color: var(--ai); background: var(--washi);
  }
  .fact-used span { color: var(--sumi-soft); }
  .stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: .6rem; margin-bottom: 1.6rem; }
  .stat { background: var(--washi-card); border: 1px solid var(--line); border-radius: 8px; padding: .7rem .8rem; text-align: center; }
  .stat b { display: block; font-family: var(--font-mincho); font-size: 1.5rem; color: var(--ai); }
  .stat span { font-size: .68rem; color: var(--sumi-soft); letter-spacing: .06em; }
  .fact code { word-break: break-all; font-size: .74rem; background: var(--washi-deep); padding: .05rem .3rem; border-radius: 3px; }
  .fact-src { word-break: break-word; }
  @media (max-width: 560px) { .fact-head h3 { font-size: .98rem; } }

/* ============================================================
   トップの骨格 — 案内板・入口・お知らせ・サイトマップ
   一本道の宣伝頁ではなく、どこへでも行ける入口として組む。
   ============================================================ */
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.nav-cta {
  background: var(--shu); color: #fff !important; border-radius: 4px;
  padding: .18rem .7rem !important; border-bottom: 0 !important;
}
.nav-cta:hover { background: var(--shu-deep); }

/* 案内板 */
.lead-band {
  background: var(--washi-deep);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(2rem, 4vw, 3.6rem);
}
.lead-grid { display: grid; gap: clamp(1.4rem, 3vw, 2.6rem); align-items: start; }
@media (min-width: 860px) { .lead-grid { grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); } }
.lead-title {
  font-family: var(--font-mincho); font-weight: 800;
  font-size: clamp(1.6rem, 1rem + 2.6vw, 2.7rem);
  line-height: 1.5; letter-spacing: .05em; margin-bottom: .8rem;
}
.lead-body { font-size: var(--text-lead); line-height: 2; max-width: 34em; }
.lead-body b { color: var(--shu-deep); }
.lead-note { margin-top: .8rem; font-size: .86rem; color: var(--sumi-soft); line-height: 1.95; }
.lead-figs {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.lead-figs > div { background: var(--washi-card); padding: .7rem .8rem; }
.lead-figs dt { font-size: .72rem; letter-spacing: .16em; color: var(--sumi-soft); }
.lead-figs dd {
  font-family: var(--font-mincho); font-weight: 700; font-size: 1.7rem;
  color: var(--ai); line-height: 1.25; font-variant-numeric: tabular-nums;
}
.lead-figs dd span { font-size: .8rem; margin-left: .12em; color: var(--sumi-soft); }
.lead-figs dd.sm { font-size: 1rem; letter-spacing: .04em; }

/* 主な入口 */
.gates { padding-block: clamp(2rem, 4vw, 3.4rem); }
.gate-grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 620px) { .gate-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .gate-grid { grid-template-columns: repeat(3, 1fr); } }
.gate {
  background: var(--washi-card); padding: 1.15rem 1.1rem;
  display: flex; flex-direction: column; gap: .3rem; color: var(--sumi);
  transition: background var(--duration-fast);
}
.gate:hover { background: #fff; color: var(--sumi); }
.gate-k {
  font-family: var(--font-mincho); font-size: .74rem; letter-spacing: .3em;
  color: var(--karashi); border-bottom: 2px solid var(--karashi);
  align-self: flex-start; padding-bottom: .1rem; margin-bottom: .25rem;
}
.gate-t { font-family: var(--font-mincho); font-size: 1.1rem; letter-spacing: .06em; }
.gate-d { font-size: .82rem; line-height: 1.85; color: var(--sumi-soft); }
.gate-game { background: #f3ece2; }
.gate-game .gate-k { color: var(--shu); border-bottom-color: var(--shu); }

/* お知らせ */
.news { padding-block: clamp(1.8rem, 3.4vw, 3rem); }
.news-list { list-style: none; }
.news-list li {
  display: grid; gap: .2rem .8rem; align-items: baseline;
  padding: .7rem 0; border-bottom: 1px solid var(--line);
  grid-template-columns: auto auto 1fr; font-size: .88rem; line-height: 1.85;
}
@media (max-width: 560px) { .news-list li { grid-template-columns: auto 1fr; } }
.news-list time {
  font-variant-numeric: tabular-nums; color: var(--sumi-soft);
  font-size: .8rem; letter-spacing: .04em;
}
.news-tag {
  font-size: .7rem; letter-spacing: .1em; padding: .08rem .5rem;
  border-radius: 3px; background: var(--ai); color: var(--washi); white-space: nowrap;
}
@media (max-width: 560px) { .news-tag { grid-column: 2; justify-self: start; } .news-list li > span:last-child { grid-column: 1 / -1; } }

/* サイトマップ */
.foot-map { display: grid; gap: 1.4rem 2rem; margin-bottom: 1.6rem; }
@media (min-width: 560px) { .foot-map { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .foot-map { grid-template-columns: repeat(4, 1fr); } }
.foot-map h3 {
  font-family: var(--font-mincho); font-size: .82rem; letter-spacing: .18em;
  padding-bottom: .35rem; margin-bottom: .5rem;
  border-bottom: 1px solid rgba(246,241,230,.28);
}
.foot-map h3.sr-only-sm { visibility: hidden; }
.foot-map ul { list-style: none; display: grid; gap: .35rem; }
.foot-map a { font-size: .84rem; opacity: .86; }
.foot-map a:hover { opacity: 1; }
.foot-note { border-top: 1px solid rgba(246,241,230,.22); padding-top: 1rem; }
.foot-note p { font-size: .8rem; line-height: 1.9; max-width: 52em; }
.foot-thin { margin-top: .6rem; opacity: .66; font-size: .74rem; }

/* ============================================================
   案内役「権現さま」
   生成AIではなく、台帳と索引を引いて答える案内役。
   だから答えには必ず出典と確度が付く。
   ============================================================ */
.gg-btn {
  position: fixed; right: 14px; bottom: 14px; z-index: 60;
  width: 62px; height: 62px; border-radius: 50%;
  border: 2px solid var(--sumi); background: var(--washi-card);
  box-shadow: 0 4px 14px rgba(34,28,22,.28);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer; padding: 0; gap: 0;
  transition: transform var(--duration-fast) var(--ease-out-expo);
}
.gg-btn:hover { transform: translateY(-2px); }
.gg-btn.on { background: var(--sumi); }
.gg-btn img { width: 42px; height: 42px; margin-top: -3px; }
.gg-bt {
  font-family: var(--font-mincho); font-size: .58rem; letter-spacing: .18em;
  color: var(--sumi-soft); margin-top: -4px;
}
.gg-btn.on .gg-bt { color: var(--washi); }

.gg-panel {
  position: fixed; right: 14px; bottom: 86px; z-index: 61;
  width: min(24rem, calc(100vw - 28px));
  max-height: min(34rem, calc(100vh - 120px));
  background: var(--washi-card);
  border: 2px solid var(--sumi); border-radius: 10px;
  box-shadow: 0 10px 34px rgba(34,28,22,.34);
  display: flex; flex-direction: column; overflow: hidden;
}
.gg-panel[hidden] { display: none; }
.gg-head {
  display: flex; align-items: center; gap: .55rem;
  padding: .55rem .7rem; background: var(--sumi); color: var(--washi);
}
.gg-name { font-family: var(--font-mincho); font-size: .98rem; letter-spacing: .1em; line-height: 1.25; }
.gg-name small { display: block; font-size: .62rem; letter-spacing: .1em; opacity: .7; }
.gg-x {
  margin-left: auto; font-size: .68rem; color: var(--washi);
  border: 1px solid rgba(246,241,230,.4); border-radius: 5px;
  background: none; padding: .2rem .55rem; cursor: pointer; min-height: 32px;
}
.gg-note {
  font-size: .68rem; line-height: 1.75; padding: .45rem .7rem;
  background: rgba(181,68,60,.07); border-bottom: 1px solid var(--line); color: var(--sumi-soft);
}
.gg-note b { color: var(--shu-deep); }
.gg-body { flex: 1 1 auto; overflow-y: auto; padding: .7rem .75rem; min-height: 6rem; }
.gg-say { font-size: .88rem; line-height: 1.95; font-family: var(--font-mincho); }
.gg-thin { margin-top: .7rem; font-size: .82rem; color: var(--sumi-soft); }
.gg-fact {
  border: 1px solid var(--line); border-radius: 6px;
  background: #fffdf8; padding: .55rem .6rem; margin: .55rem 0;
}
.gg-fh { display: flex; align-items: center; gap: .35rem; flex-wrap: wrap; margin-bottom: .3rem; }
.gg-fh b { font-family: var(--font-mincho); font-size: .92rem; }
.gg-c { font-size: .62rem; padding: .06rem .4rem; border-radius: 3px; background: var(--ai); color: #fff; }
.gg-c-disputed, .gg-c-legend { background: var(--karashi); }
.gg-d { font-size: .66rem; color: var(--sumi-soft); margin-left: auto; }
.gg-st { font-size: .78rem; line-height: 1.85; }
.gg-src { font-size: .64rem; color: var(--sumi-soft); margin-top: .3rem; line-height: 1.7; }
.gg-links { list-style: none; display: grid; gap: .3rem; margin-top: .35rem; }
.gg-links a {
  display: flex; align-items: baseline; gap: .4rem;
  border: 1px solid var(--line); border-radius: 5px;
  padding: .35rem .5rem; background: #fffdf8; font-size: .84rem;
}
.gg-links a:hover { background: #fff; border-color: var(--line-strong); }
.gg-links b { font-family: var(--font-mincho); font-weight: 600; }
.gg-cat { font-size: .64rem; color: var(--sumi-soft); margin-left: auto; white-space: nowrap; }
.gg-sug {
  display: flex; gap: .3rem; overflow-x: auto; padding: .4rem .7rem;
  border-top: 1px solid var(--line); background: var(--washi-deep);
}
.gg-s {
  flex: 0 0 auto; font-size: .74rem; white-space: nowrap; cursor: pointer;
  border: 1px solid var(--line-strong); border-radius: 999px;
  background: var(--washi-card); padding: .25rem .7rem; min-height: 32px;
}
.gg-form { display: flex; gap: .35rem; padding: .5rem .7rem calc(env(safe-area-inset-bottom) + .5rem); border-top: 1px solid var(--line); }
.gg-in {
  flex: 1 1 auto; min-width: 0; min-height: 42px;
  border: 1px solid var(--line-strong); border-radius: 6px;
  padding: 0 .6rem; font: inherit; font-size: .9rem; background: #fff;
}
.gg-go {
  flex: 0 0 auto; min-height: 42px; padding: 0 1rem; cursor: pointer;
  background: var(--sumi); color: var(--washi); border: 0; border-radius: 6px;
  font-family: var(--font-mincho); letter-spacing: .1em; font-size: .88rem;
}
@media (max-width: 480px) {
  .gg-panel { right: 8px; left: 8px; width: auto; bottom: 80px; }
  .gg-btn { right: 10px; bottom: 10px; width: 56px; height: 56px; }
}

/* 版の刻印。携帯で古い頁を掴んでいないか、見ただけで判るように */
.build-stamp {
  position: fixed; left: 6px; bottom: 4px; z-index: 3;
  font-size: 9px; letter-spacing: .06em; color: rgba(90,80,68,.4);
  font-variant-numeric: tabular-nums; pointer-events: none;
}

/* ============================================================
   動きの層（js/motion.js が付ける印）
   transform と opacity だけを動かす。位置と大きさは触らない。
   ============================================================ */
.rise {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 620ms var(--ease-out-expo) var(--rise-d, 0ms),
    transform 620ms var(--ease-out-expo) var(--rise-d, 0ms);
  will-change: opacity, transform;
}
.rise.shown { opacity: 1; transform: none; }
/* 出し終えたら will-change を降ろす。付けっぱなしは層を無駄に抱える。 */
.rise.shown { will-change: auto; }

/* 図版は、わずかに寄ってから収まる */
.entry-figure.rise { transform: translateY(24px) scale(.985); }
.entry-figure.rise.shown { transform: none; }
.entry-figure img { transition: transform 900ms var(--ease-out-expo); }
.entry-figure:hover img { transform: scale(1.012); }

/* 引用の一行は、朱の線が伸びてから字が出る */
.pull-fact.rise { transform: translateX(-14px); }
.pull-fact.rise.shown { transform: none; }

/* 読み進みの帯 */
.read-bar {
  position: fixed; inset-inline: 0; top: 0; height: 2px; z-index: 60;
  background: rgba(34, 28, 22, .08); pointer-events: none;
}
.read-bar i {
  display: block; height: 100%; background: var(--shu);
  transform: scaleX(0); transform-origin: 0 50%;
}

/* 見出しの脇の大字は、動かすので描画を独立させる */
.cat-hero-glyph, .entry-hero-glyph { will-change: transform; }

/* 札とリンクの手ざわり */
.entry-card, .cat-tile, .gate-card {
  transition:
    transform var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-fast);
}
.entry-card:hover, .gate-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px -22px rgba(34, 28, 22, .5);
}
.entry-card .arrow { transition: transform var(--duration-normal) var(--ease-out-expo); display: inline-block; }
.entry-card:hover .arrow { transform: translateX(5px); }

/* 本文中のリンクは、下線が引かれてから色がつく */
.entry-body p a, .entry-body li a {
  background-image: linear-gradient(var(--shu), var(--shu));
  background-size: 0% 1px; background-position: 0 100%; background-repeat: no-repeat;
  transition: background-size var(--duration-normal) var(--ease-out-expo), color var(--duration-fast);
  text-decoration: none;
}
.entry-body p a:hover, .entry-body li a:hover { background-size: 100% 1px; color: var(--shu); }

@media (prefers-reduced-motion: reduce) {
  .rise, .rise.shown { opacity: 1; transform: none; transition: none; }
  .entry-figure img, .entry-card, .cat-tile, .gate-card { transition: none; }
  .entry-figure:hover img, .entry-card:hover, .gate-card:hover { transform: none; }
  .read-bar { display: none; }
  .entry-body p a, .entry-body li a { background-size: 100% 1px; }
}