:root {
  --bg: #f6f0e6;
  --bg-soft: #fbf7f1;
  --surface: rgba(255, 252, 247, 0.88);
  --surface-strong: #fffdf8;
  --line: rgba(86, 64, 43, 0.16);
  --line-strong: rgba(86, 64, 43, 0.28);
  --text: #2f261d;
  --muted: #685949;
  --accent: #8e3b2f;
  --accent-dark: #6f2e25;
  --accent-soft: #efe0d6;
  --ink: #193847;
  --shadow: 0 18px 45px rgba(60, 39, 18, 0.12);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --wrap: min(1120px, calc(100vw - 32px));
  --page-glow-left: rgba(216, 192, 163, 0.38);
  --page-glow-right: rgba(142, 59, 47, 0.1);
  --page-bg-start: #f8f1e6;
  --page-bg-middle: #f2ece2;
  --page-bg-end: #f8f4ee;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "BIZ UDPGothic", "Yu Gothic", "Hiragino Sans", sans-serif;
  line-height: 1.75;
  background:
    radial-gradient(circle at top left, var(--page-glow-left), transparent 32%),
    radial-gradient(circle at top right, var(--page-glow-right), transparent 24%),
    linear-gradient(180deg, var(--page-bg-start) 0%, var(--page-bg-middle) 46%, var(--page-bg-end) 100%);
}

body.theme-about {
  --surface: rgba(250, 252, 255, 0.88);
  --surface-strong: #fcfdff;
  --page-glow-left: rgba(166, 182, 205, 0.34);
  --page-glow-right: rgba(126, 110, 91, 0.08);
  --page-bg-start: #eef2f7;
  --page-bg-middle: #eceff3;
  --page-bg-end: #f6f2ee;
}

body.theme-participate {
  --surface: rgba(250, 253, 247, 0.88);
  --surface-strong: #fdfef9;
  --page-glow-left: rgba(181, 201, 158, 0.34);
  --page-glow-right: rgba(143, 120, 87, 0.08);
  --page-bg-start: #f2f5ea;
  --page-bg-middle: #edf1e4;
  --page-bg-end: #f8f4ee;
}

body.theme-publications {
  --surface: rgba(255, 250, 244, 0.9);
  --surface-strong: #fffdf9;
  --page-glow-left: rgba(214, 180, 121, 0.32);
  --page-glow-right: rgba(137, 98, 65, 0.09);
  --page-bg-start: #f7efe1;
  --page-bg-middle: #f3ecdf;
  --page-bg-end: #faf5ee;
}

body.theme-community {
  --surface: rgba(255, 248, 246, 0.9);
  --surface-strong: #fffdfb;
  --page-glow-left: rgba(214, 164, 156, 0.3);
  --page-glow-right: rgba(128, 106, 147, 0.09);
  --page-bg-start: #f8eeec;
  --page-bg-middle: #f4ece9;
  --page-bg-end: #faf4ef;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.wrap {
  width: var(--wrap);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  padding: 10px 14px;
  background: var(--accent-dark);
  color: #fff;
  border-radius: 999px;
  z-index: 100;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  padding: 24px 0 14px;
  background:
    linear-gradient(180deg, rgba(248, 241, 230, 0.45), rgba(248, 241, 230, 0.2)),
    url("./images/background.jpg") center top / auto 100% repeat-x;
}

.site-kicker,
.section-kicker,
.eyebrow,
.panel-label,
.tier-label,
.quick-label,
.news-tag,
.footer-subtitle {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-dark);
}

.header-main {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.8fr);
  gap: 28px;
  align-items: stretch;
}

.header-copy,
.hero-panel,
.note-card,
.news-card,
.quick-card,
.tier-group,
.code-card,
.support-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.header-copy {
  padding: 34px;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.header-copy::after {
  content: "";
  position: absolute;
  inset: auto -40px -60px auto;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(142, 59, 47, 0.22), transparent 68%);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 10px;
}

h1,
h2,
h3,
.footer-title {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "MS PMincho", serif;
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: 16px;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  margin-bottom: 14px;
}

h3 {
  font-size: 1.22rem;
  margin-bottom: 10px;
}

p,
li,
dd,
dt {
  font-size: 1rem;
}

.lead {
  max-width: 50ch;
  margin-bottom: 24px;
  color: var(--muted);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible,
.quick-card:hover,
.quick-card:focus-visible,
.text-link:hover,
.text-link:focus-visible,
.global-nav a:hover,
.global-nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--accent);
  color: #fff;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-dark);
}

.button-secondary {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.download-button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.download-button {
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: center;
  min-height: 88px;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(93, 54, 20, 0.18);
  transition: transform 180ms ease, background-color 180ms ease;
}

.download-button:hover,
.download-button:focus-visible {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

.download-button-label {
  font-size: 1.05rem;
  font-weight: 800;
}

.download-button-note {
  font-size: 0.88rem;
  opacity: 0.86;
}

.hero-panel {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.feature-list,
.small-list,
.support-list,
.footer-links {
  margin: 0;
  padding-left: 1.2rem;
}

.small-list a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration-thickness: 2px;
}

.list-note {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.88rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.feature-list li + li,
.small-list li + li,
.support-list li + li,
.footer-links li + li {
  margin-top: 8px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 24px 0 0;
}

.hero-facts div {
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.hero-facts dt {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}

.hero-facts dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.global-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.global-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  text-decoration: none;
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.68);
  border: 1px solid var(--line);
  color: var(--ink);
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease;
}

.section {
  padding: 72px 0;
}

.section-soft {
  background:
    linear-gradient(180deg, rgba(255, 250, 245, 0.76), rgba(250, 245, 238, 0.68)),
    repeating-linear-gradient(
      135deg,
      rgba(130, 103, 74, 0.03) 0,
      rgba(130, 103, 74, 0.03) 10px,
      rgba(255, 255, 255, 0) 10px,
      rgba(255, 255, 255, 0) 20px
    );
}

.intro-grid,
.directory-grid,
.support-grid,
.section-heading,
.news-grid,
.quick-grid,
.tier-grid,
.footer-grid,
.subpage-hero,
.page-grid,
.subpage-note-grid {
  display: grid;
  gap: 24px;
}

.intro-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: start;
}

.note-card {
  padding: 28px;
  border-radius: var(--radius-md);
}

.note-title {
  margin-top: 0;
  font-weight: 700;
}

.number-list {
  margin: 0;
  padding-left: 1.2rem;
}

.number-list li + li {
  margin-top: 10px;
}

.section-heading {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  align-items: end;
  margin-bottom: 28px;
}

.section-copy {
  margin: 0;
  color: var(--muted);
}

.news-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.news-card {
  padding: 26px;
  border-radius: var(--radius-md);
}

.news-card-featured {
  background:
    linear-gradient(180deg, rgba(142, 59, 47, 0.12), rgba(255, 252, 247, 0.94)),
    var(--surface);
}

.news-date {
  color: var(--muted);
  font-size: 0.92rem;
}

.lounge-top-list {
  margin-bottom: 16px;
}

.lounge-top-list li + li,
.lounge-latest-list li + li {
  margin-top: 12px;
}

.text-link {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration-thickness: 2px;
}

.card-title-link {
  color: inherit;
  text-decoration: none;
}

.card-title-link:hover,
.card-title-link:focus-visible {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.quick-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.quick-card {
  display: grid;
  gap: 8px;
  min-height: 188px;
  padding: 24px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease;
}

.quick-card-about,
.tier-group-about {
  --category-surface: rgba(235, 242, 252, 0.98);
  --category-surface-strong: #f4f8fd;
  --category-line: rgba(134, 157, 188, 0.62);
  --category-soft: rgba(166, 182, 205, 0.34);
  --category-strong: rgba(146, 167, 197, 0.44);
}

.quick-card-participate,
.tier-group-participate {
  --category-surface: rgba(239, 246, 230, 0.98);
  --category-surface-strong: #f7fbf0;
  --category-line: rgba(157, 182, 124, 0.64);
  --category-soft: rgba(181, 201, 158, 0.34);
  --category-strong: rgba(164, 190, 136, 0.44);
}

.quick-card-publications,
.tier-group-publications {
  --category-surface: rgba(252, 242, 227, 0.98);
  --category-surface-strong: #fff8ee;
  --category-line: rgba(198, 156, 88, 0.62);
  --category-soft: rgba(214, 180, 121, 0.34);
  --category-strong: rgba(211, 170, 103, 0.46);
}

.quick-card-community,
.tier-group-community {
  --category-surface: rgba(252, 238, 235, 0.98);
  --category-surface-strong: #fff7f4;
  --category-line: rgba(196, 142, 134, 0.62);
  --category-soft: rgba(214, 164, 156, 0.34);
  --category-strong: rgba(206, 151, 143, 0.46);
}

.quick-card-about,
.quick-card-participate,
.quick-card-publications,
.quick-card-community {
  background: linear-gradient(180deg, var(--category-surface), var(--category-surface-strong));
  border-color: var(--category-line);
  box-shadow: 0 16px 34px rgba(79, 61, 43, 0.08);
}

.quick-card-about .quick-label,
.quick-card-participate .quick-label,
.quick-card-publications .quick-label,
.quick-card-community .quick-label {
  color: var(--accent-dark);
}

.quick-card strong {
  font-size: 1.2rem;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "MS PMincho", serif;
}

.tier-layout {
  display: grid;
  gap: 18px;
}

.tier-group {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.tier-group summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.55);
}

.tier-group-about,
.tier-group-participate,
.tier-group-publications,
.tier-group-community {
  border: 1px solid var(--category-line);
}

.tier-group-about summary,
.tier-group-participate summary,
.tier-group-publications summary,
.tier-group-community summary {
  background: linear-gradient(180deg, var(--category-soft), rgba(255, 255, 255, 0.84));
}

.tier-group summary::-webkit-details-marker {
  display: none;
}

.decade-group {
  margin-top: 24px;
  border: 1px solid rgba(86, 64, 43, 0.14);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.26);
  overflow: hidden;
}

.decade-summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  cursor: pointer;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(248, 242, 232, 0.76));
}

.decade-summary::-webkit-details-marker {
  display: none;
}

.decade-summary-heading {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.decade-summary-heading .section-kicker {
  margin: 0;
}

.decade-summary-heading strong {
  font-size: 1.36rem;
  line-height: 1.35;
  color: var(--text);
}

.decade-summary-meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.decade-summary::after {
  content: "-";
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  min-height: 36px;
  padding: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(86, 64, 43, 0.14);
  color: var(--accent-dark);
  font-size: 1.1rem;
  font-weight: 700;
}

.decade-group:not([open]) .decade-summary::after {
  content: "+";
}

.decade-body {
  padding: 0 24px 24px;
  border-top: 1px solid rgba(86, 64, 43, 0.08);
}

.year-group {
  border: 1px solid rgba(86, 64, 43, 0.1);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.24);
  overflow: hidden;
}

.year-group + .year-group {
  margin-top: 14px;
}

.year-summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.74);
}

.year-summary::-webkit-details-marker {
  display: none;
}

.year-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text);
}

.year-count {
  color: var(--muted);
  font-size: 0.9rem;
}

.year-summary::after {
  content: "-";
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  min-height: 32px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(86, 64, 43, 0.14);
  color: var(--accent-dark);
  font-size: 1rem;
  font-weight: 700;
}

.year-group:not([open]) .year-summary::after {
  content: "+";
}

.year-body {
  padding: 0 18px 18px;
  border-top: 1px solid rgba(86, 64, 43, 0.08);
}

.decade-body .tier-layout {
  margin-top: 18px;
}

.decade-body .tier-layout {
  gap: 14px;
}

.year-body .tier-layout-half {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.decade-body .tier-group summary {
  gap: 12px;
  padding: 16px 18px;
}

.decade-body .tier-name {
  min-height: 28px;
  padding: 0 8px;
  font-size: 0.76rem;
}

.decade-body .issue-detail {
  padding: 0 18px 18px;
}

.decade-body .toc-simple-list {
  gap: 6px;
}

.decade-body .toc-simple-list li {
  padding: 10px 12px;
}

.decade-body .toc-simple-list strong {
  margin-bottom: 3px;
  font-size: 0.84rem;
}

.tier-name {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 700;
}

.tier-group-about .tier-name,
.tier-group-participate .tier-name,
.tier-group-publications .tier-name,
.tier-group-community .tier-name {
  background: var(--category-strong);
}

.tier-name-link {
  color: inherit;
  text-decoration: none;
}

.tier-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 0 24px 24px;
}

.tier-card {
  position: relative;
  padding: 22px;
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  border: 1px solid rgba(86, 64, 43, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.tier-group-about .tier-card,
.tier-group-participate .tier-card,
.tier-group-publications .tier-card,
.tier-group-community .tier-card {
  background: linear-gradient(180deg, var(--category-surface), var(--category-surface-strong));
  border-color: var(--category-line);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.tier-card:hover,
.tier-card:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(79, 61, 43, 0.1);
}

.tier-card-link {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 1;
}

.tier-card-link:focus-visible {
  outline: 3px solid rgba(154, 104, 64, 0.28);
  outline-offset: 3px;
}

.tier-card h3,
.tier-card .tier-card-copy,
.tier-card .small-list {
  position: relative;
  z-index: 2;
}

.tier-card h3 {
  pointer-events: none;
}

.tier-card h3 a {
  pointer-events: auto;
  position: relative;
  z-index: 3;
}

.tier-card .tier-card-copy {
  pointer-events: none;
}

.tier-card-copy {
  margin: 10px 0 0;
  color: var(--muted);
}

.tier-card .link-row {
  margin-top: 16px;
}

.directory-grid {
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1.08fr);
  align-items: start;
}

.code-card {
  padding: 22px;
  border-radius: var(--radius-md);
  overflow-x: auto;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
}

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

.subpage-header {
  padding: 24px 0 8px;
}

.breadcrumb {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

.breadcrumb a {
  color: var(--accent-dark);
  font-weight: 700;
}

.subpage-hero {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: stretch;
}

.subpage-copy {
  padding: 30px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.subpage-hero > .subpage-copy:only-child {
  grid-column: 1 / -1;
}

.page-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.page-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-card p:last-child,
.page-card ul:last-child {
  margin-bottom: 0;
}

.page-card-large {
  grid-column: 1 / -1;
}

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

.info-box {
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(255, 253, 248, 0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.portal-hero {
  align-items: stretch;
}

.portal-hero .subpage-copy {
  background: var(--surface);
}

.portal-symbol-banner {
  margin: 22px 0 0;
  width: fit-content;
  max-width: min(360px, 100%);
}

.portal-symbol-banner img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.portal-panel-note {
  margin-top: 18px;
}

.portal-panel-media {
  margin: 18px 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(86, 64, 43, 0.12);
  background: rgba(255, 255, 255, 0.62);
}

.portal-panel-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.portal-panel-media figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

.portal-map-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.75fr);
  gap: 24px;
  align-items: start;
}

.portal-map-card,
.scholar-card,
.portal-appendix-card {
  background: var(--surface);
}

.portal-map-frame {
  margin-top: 20px;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.portal-map-frame iframe {
  display: block;
  width: 100%;
  height: clamp(420px, 58vw, 680px);
  border: 0;
}

.portal-map-guide {
  position: sticky;
  top: 20px;
}

.portal-area-list {
  display: grid;
  gap: 12px;
}

.scholar-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.scholar-card-wide {
  grid-column: 1 / -1;
}

.scholar-meta {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.scholar-link {
  margin: 16px 0 0;
  line-height: 1.8;
}

.portal-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.portal-link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(86, 64, 43, 0.12);
  color: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.portal-photo-list {
  margin: 14px 0 0;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(86, 64, 43, 0.12);
  background: rgba(255, 255, 255, 0.62);
  list-style: none;
}

.portal-photo-list li + li {
  margin-top: 8px;
}

.portal-photo-list a {
  font-weight: 700;
}

.portal-family-list {
  margin: 16px 0 0;
  padding-left: 1.2rem;
}

.portal-family-list li + li {
  margin-top: 10px;
}

.portal-reference-grid {
  align-items: stretch;
}

.event-year-note {
  margin: 0;
  padding: 0 24px 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.event-year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
  padding: 0 24px 24px;
}

.archive-event-card {
  padding: 18px 18px 16px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(86, 64, 43, 0.12);
  box-shadow: none;
}

.archive-event-card .tier-label {
  margin: 0 0 4px;
}

.archive-event-card h3 {
  margin-bottom: 0;
  font-size: 1.08rem;
}

.event-card-overview {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.event-card-fact {
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.event-card-fact-label {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.event-card-fact-text {
  font-size: 0.95rem;
  line-height: 1.55;
}

.event-card-fact-date {
  background: rgba(239, 224, 214, 0.52);
}

.event-detail-panel {
  margin-top: 12px;
  border-top: 1px solid rgba(86, 64, 43, 0.12);
  padding-top: 12px;
}

.event-detail-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  color: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 700;
}

.event-detail-panel summary::-webkit-details-marker {
  display: none;
}

.event-detail-panel summary::after {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 1rem;
  line-height: 1;
}

.event-detail-panel[open] summary::after {
  content: "-";
}

.event-detail-body {
  display: grid;
  gap: 12px;
  padding-top: 12px;
  max-height: min(32rem, 70vh);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 4px;
  scrollbar-gutter: stable;
}

.archive-event-card .toc-simple-list {
  gap: 6px;
  margin-top: 0;
}

.archive-event-card .toc-simple-list li {
  padding: 10px 12px;
}

.archive-event-card .toc-simple-list strong {
  margin-bottom: 3px;
  font-size: 0.84rem;
}

.archive-event-card .link-row {
  gap: 8px;
  margin-top: 0;
}

.archive-event-card .button {
  min-height: 40px;
  padding: 0 14px;
  font-size: 0.92rem;
}

.upcoming-events-grid {
  padding: 0;
}

.upcoming-event-card {
  background:
    linear-gradient(180deg, rgba(255, 250, 240, 0.98), rgba(255, 244, 225, 0.95));
  border-color: rgba(188, 143, 74, 0.28);
  box-shadow: 0 18px 34px rgba(101, 77, 43, 0.08);
}

.upcoming-event-card .tier-label {
  color: #8a5d21;
}

.mini-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.mini-links a {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 700;
}

.inline-stat-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.toc-simple-list {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.toc-simple-list li {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.toc-simple-list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.92rem;
}

.lesson-video-grid {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-video-card {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.lesson-video-card h4 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 1rem;
}

.lesson-video-links {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-video-links a,
.lesson-video-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
}

.lesson-video-links a {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

.lesson-video-links a:hover,
.lesson-video-links a:focus-visible {
  background: var(--accent-dark);
}

.lesson-video-placeholder {
  background: rgba(86, 64, 43, 0.08);
  color: var(--muted);
}

.lesson-material-links {
  margin-top: 10px;
}

.lesson-material-links a,
.lesson-material-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 12px;
  border-radius: 14px;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
}

.lesson-material-links a {
  background: rgba(146, 167, 197, 0.18);
  color: #47627e;
  text-decoration: none;
  border: 1px solid rgba(71, 98, 126, 0.22);
}

.lesson-material-links a:hover,
.lesson-material-links a:focus-visible {
  background: rgba(146, 167, 197, 0.28);
  color: #314d68;
}

.lesson-material-placeholder {
  background: rgba(86, 64, 43, 0.06);
  color: var(--muted);
  border: 1px dashed rgba(86, 64, 43, 0.18);
}

.inline-stat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.inline-stat-list li {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
  font-weight: 700;
}

.stack-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
}

.stack-item {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.stack-item strong {
  display: block;
  margin-bottom: 4px;
}

.source-note {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.prose-block {
  display: grid;
  gap: 14px;
}

.prose-block p,
.prose-block blockquote {
  margin: 0;
}

.quote-box {
  padding: 20px 22px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(86, 64, 43, 0.14);
  border-left: 4px solid var(--accent);
}

.quote-box cite {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-style: normal;
  font-size: 0.92rem;
}

.info-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.action-banner {
  margin-bottom: 24px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(86, 64, 43, 0.14);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(247, 241, 232, 0.72));
  box-shadow: var(--shadow);
}

.action-banner-copy h2 {
  margin-bottom: 8px;
}

.action-banner-copy p:last-child {
  margin-bottom: 0;
}

.action-banner-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.action-banner-card {
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(86, 64, 43, 0.12);
  background: rgba(255, 255, 255, 0.72);
}

.action-banner-card h3 {
  margin-bottom: 8px;
  font-size: 1.08rem;
}

.action-banner-card p:last-child,
.action-banner-card .link-row:last-child {
  margin-bottom: 0;
}

.action-banner-participate {
  background: linear-gradient(180deg, rgba(232, 241, 228, 0.92), rgba(248, 251, 246, 0.9));
  border-color: rgba(90, 123, 86, 0.2);
}

.info-panel {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.info-panel p:last-child,
.info-panel ul:last-child {
  margin-bottom: 0;
}

.course-calendar-block {
  margin-top: 24px;
  padding: 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(248, 251, 242, 0.98), rgba(255, 255, 255, 0.94));
  border: 1px solid rgba(136, 161, 107, 0.18);
}

.course-calendar-header h4 {
  margin: 6px 0 8px;
  color: var(--accent-dark);
  font-size: 1.2rem;
}

.course-calendar-header p:last-child {
  margin: 0;
  color: var(--muted);
}

.course-calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.course-calendar-card {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(86, 64, 43, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.calendar-month-label {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 1.02rem;
  font-weight: 700;
}

.calendar-entry-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.calendar-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(86, 64, 43, 0.1);
  color: inherit;
  text-decoration: none;
}

.calendar-entry:hover,
.calendar-entry:focus-visible {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(86, 64, 43, 0.18);
}

.calendar-entry:hover .calendar-date,
.calendar-entry:focus-visible .calendar-date {
  text-decoration: underline;
}

.calendar-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.calendar-badge-first {
  background: rgba(166, 186, 138, 0.26);
  color: #506238;
}

.calendar-badge-second {
  background: rgba(205, 191, 168, 0.28);
  color: #6d5638;
}

.calendar-badge-camp {
  background: rgba(214, 180, 121, 0.28);
  color: #855d21;
}

.calendar-badge-tenkai {
  background: rgba(146, 167, 197, 0.24);
  color: #47627e;
}

.calendar-badge-sodoku {
  background: rgba(154, 177, 133, 0.24);
  color: #4f6538;
}

.calendar-badge-moji {
  background: rgba(196, 159, 115, 0.24);
  color: #7d5930;
}

.calendar-date {
  margin-left: auto;
  color: var(--accent-dark);
  font-weight: 700;
  text-align: right;
  white-space: nowrap;
}

.course-calendar-card-rest {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(180deg, rgba(247, 245, 239, 0.95), rgba(255, 255, 255, 0.9));
}

.course-calendar-card-camp {
  background: linear-gradient(180deg, rgba(255, 248, 233, 0.95), rgba(255, 255, 255, 0.92));
}

.calendar-rest-label {
  margin: 0;
  color: var(--accent-dark);
  font-size: 1.18rem;
  font-weight: 700;
}

.calendar-rest-note {
  margin: 10px 0 0;
  color: var(--muted);
}

.honorary-panel {
  display: grid;
  gap: 16px;
}

.honorary-portrait {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid rgba(86, 64, 43, 0.12);
  background: rgba(255, 255, 255, 0.72);
}

.honorary-portrait img {
  display: block;
  width: 100%;
  height: auto;
}

.honorary-portrait figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

.honorary-link-list {
  margin-top: 0;
}

.legacy-content {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.legacy-content #content {
  display: grid;
  gap: 18px;
}

.legacy-content .contents_title {
  display: none;
}

.legacy-content .contents_detail {
  overflow-x: auto;
}

.legacy-content .level1,
.legacy-content .level2,
.legacy-content .level3 {
  margin: 0;
}

.legacy-content .level1 + .level1,
.legacy-content .level2 + .level2,
.legacy-content .level3 + .level3,
.legacy-content .contents_detail + .level1,
.legacy-content .contents_detail + .level2,
.legacy-content .contents_detail + .level3 {
  margin-top: 18px;
}

.legacy-content .level1_title,
.legacy-content .level2_title,
.legacy-content .level3_title {
  margin: 0;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(205, 191, 168, 0.22);
  border: 1px solid rgba(86, 64, 43, 0.14);
  color: var(--accent-dark);
  font-size: 1.02rem;
  font-weight: 700;
}

.legacy-content .level1_detail,
.legacy-content .level2_detail,
.legacy-content .level3_detail {
  display: block;
  margin: 10px 0 0;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(86, 64, 43, 0.12);
}

.legacy-content .level1_detail_text,
.legacy-content .level2_detail_text,
.legacy-content .level3_detail {
  line-height: 1.9;
}

.tribute-page .legacy-content .level1_title.is-collapsible {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.tribute-page .legacy-content .level1_title.is-collapsible:hover {
  background: rgba(205, 191, 168, 0.3);
  border-color: rgba(86, 64, 43, 0.22);
}

.tribute-page .legacy-content .level1_title.is-collapsible:focus-visible {
  outline: 3px solid rgba(154, 104, 64, 0.28);
  outline-offset: 2px;
}

.tribute-page .legacy-content .level1_title.is-collapsible::after {
  content: "開く";
  flex: 0 0 auto;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(86, 64, 43, 0.14);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.tribute-page .legacy-content .level1_title.is-collapsible.is-open::after {
  content: "閉じる";
}

.tribute-page .legacy-content .level1_detail[hidden] {
  display: none;
}

.legacy-content p,
.legacy-content ul,
.legacy-content ol {
  margin: 0 0 1rem;
}

.legacy-content hr {
  border: 0;
  border-top: 1px solid rgba(86, 64, 43, 0.14);
  margin: 18px 0;
}

.legacy-content table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.78);
}

.legacy-content th,
.legacy-content td {
  padding: 12px 14px;
  border: 1px solid rgba(86, 64, 43, 0.16);
  vertical-align: top;
  line-height: 1.7;
}

.legacy-content th {
  background: rgba(205, 191, 168, 0.24);
  color: var(--accent-dark);
  font-weight: 700;
}

.legacy-content .td_center {
  white-space: nowrap;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.legacy-content a {
  word-break: break-word;
}

.title-sample-list {
  display: grid;
  gap: 24px;
}

.title-sample {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 18px;
  border: 1px solid rgba(86, 64, 43, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
}

.title-sample a {
  display: block;
}

.title-sample img {
  width: min(520px, 100%);
  max-height: 360px;
  object-fit: contain;
  object-position: left center;
  border-radius: var(--radius-sm);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.title-sample figcaption {
  color: var(--text);
  line-height: 1.9;
}

.recommended-page .legacy-content .level2_title {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(236, 225, 206, 0.92), rgba(244, 238, 227, 0.98));
  border: 1px solid rgba(154, 104, 64, 0.18);
  border-left: 5px solid rgba(154, 104, 64, 0.52);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.recommended-page .legacy-content .level2_title::before {
  content: "推薦者";
  flex: 0 0 auto;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.88);
  border: 1px solid rgba(154, 104, 64, 0.18);
  color: var(--accent-dark);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.recommended-page .legacy-content .level3_title {
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: 0;
  font-size: 0.98rem;
}

.recommended-page .legacy-content .level2_detail {
  margin-top: 12px;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.recommended-page .legacy-content .level2 + .level2 {
  margin-top: 24px;
}

.recommended-page .legacy-content .level3 {
  display: grid;
  gap: 6px;
}

.recommended-page .legacy-content .level3.is-collapsible-card {
  gap: 0;
  border: 1px solid rgba(154, 104, 64, 0.14);
  border-radius: var(--radius-sm);
  background: rgba(255, 252, 246, 0.95);
  box-shadow: 0 10px 20px rgba(79, 61, 43, 0.05);
  overflow: hidden;
}

.recommended-page .legacy-content .level3 + .level3 {
  margin-top: 16px;
}

.recommended-page .legacy-content .level3_title.is-collapsible {
  position: relative;
  padding: 14px 48px 14px 16px;
  background: linear-gradient(180deg, rgba(255, 250, 242, 0.98), rgba(248, 241, 230, 0.98));
  cursor: pointer;
  font-weight: 700;
  transition: background 160ms ease;
}

.recommended-page .legacy-content .level3_title.is-collapsible:hover {
  background: linear-gradient(180deg, rgba(250, 239, 220, 0.98), rgba(245, 234, 215, 0.98));
}

.recommended-page .legacy-content .level3_title.is-collapsible:focus-visible {
  outline: 3px solid rgba(154, 104, 64, 0.28);
  outline-offset: -3px;
}

.recommended-page .legacy-content .level3_title.is-collapsible::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(255, 253, 248, 0.9);
  border: 1px solid rgba(154, 104, 64, 0.16);
  color: var(--accent-dark);
  font-size: 1.05rem;
  line-height: 1;
}

.recommended-page .legacy-content .level3_title.is-collapsible.is-open::after {
  content: "-";
}

.recommended-page .legacy-content .level3_detail {
  margin-top: 0;
  padding: 14px 16px 16px;
  border-radius: 0;
  border-top: 1px solid rgba(154, 104, 64, 0.12);
  border-left: 0;
  background: rgba(255, 255, 255, 0.72);
  line-height: 1.85;
}

.recommended-page .legacy-content .level3_detail[hidden] {
  display: none;
}

.recommended-intro-box {
  max-width: 860px;
}

.recommended-intro-box .link-row {
  margin-top: 18px;
}

.faq-section + .faq-section {
  margin-top: 36px;
}

.faq-section-header {
  margin-bottom: 16px;
}

.faq-section-header h3 {
  margin: 0 0 6px;
  color: var(--accent-dark);
  font-size: 1.28rem;
}

.faq-section-header p {
  margin: 0;
  color: var(--muted);
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  border: 1px solid rgba(86, 64, 43, 0.14);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(249, 246, 239, 0.94));
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  color: var(--accent-dark);
  font-weight: 700;
  line-height: 1.7;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "開く";
  flex: 0 0 auto;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(205, 191, 168, 0.26);
  color: var(--accent-dark);
  font-size: 0.83rem;
  font-weight: 700;
}

.faq-item[open] summary::after {
  content: "閉じる";
}

.faq-answer {
  display: grid;
  gap: 12px;
  padding: 0 20px 18px;
}

.faq-answer p,
.faq-answer ul {
  margin: 0;
  line-height: 1.85;
}

.faq-answer ul {
  padding-left: 1.25em;
}

.faq-answer li + li {
  margin-top: 6px;
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pdf-card {
  display: grid;
  gap: 14px;
}

.pdf-card h3 {
  margin-bottom: 0;
}

.pdf-card .book-summary,
.pdf-card .book-meta,
.pdf-card .link-row,
.pdf-card .book-toc {
  margin-top: 0;
}

.pdf-card .book-toc-body {
  max-height: min(22rem, 70vh);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.archive-group-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.archive-group-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.archive-resource-grid {
  display: grid;
  gap: 18px;
  margin-top: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.archive-resource-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.archive-resource-item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.42);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.archive-resource-item h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  line-height: 1.55;
}

.resource-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.resource-summary {
  margin: 8px 0 0;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 10px;
}

.resource-links a {
  color: var(--accent-dark);
  font-weight: 600;
  text-decoration-thickness: 1.5px;
}

.issue-detail {
  padding: 0 24px 24px;
}

.issue-detail .toc-simple-list {
  margin-top: 0;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step-card,
.book-card {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 700;
}

.step-card h3,
.book-card h3 {
  margin-top: 14px;
  margin-bottom: 10px;
}

.book-id {
  display: inline-flex;
  align-items: center;
  margin-right: 0.55em;
  padding: 0.18em 0.7em;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(86, 64, 43, 0.12);
  color: var(--accent-dark);
  font-size: 0.78em;
  font-weight: 700;
  vertical-align: middle;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 0 24px 24px;
}

.book-card .inline-stat-list {
  margin-top: 0;
}

.book-meta {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.book-summary {
  margin: 0 0 14px;
  line-height: 1.75;
}

.book-title-link {
  color: inherit;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.16em;
}

.book-title-link:hover,
.book-title-link:focus-visible {
  color: var(--accent-dark);
}

.book-description {
  margin: 0 0 14px;
  position: relative;
  border: 1px solid rgba(86, 64, 43, 0.12);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.46);
}

.book-description summary {
  position: relative;
  display: block;
  padding: 14px 16px 42px;
  cursor: pointer;
  line-height: 1.75;
  list-style: none;
}

.book-description summary::-webkit-details-marker {
  display: none;
}

.book-description .book-summary {
  margin: 0;
}

.book-description summary::after {
  content: "詳しく見る";
  position: absolute;
  right: 16px;
  bottom: 12px;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 700;
}

.book-description[open] summary::after {
  content: "閉じる";
}

.book-description:not([open]) summary {
  max-height: 10.8rem;
  overflow: hidden;
}

.book-description:not([open])::after {
  content: "";
  position: absolute;
  left: 1px;
  right: 1px;
  bottom: 36px;
  height: 44px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 252, 247, 0.96));
  pointer-events: none;
}

.book-description-body {
  display: grid;
  gap: 10px;
  margin: 0 16px 16px;
  padding: 14px 16px 0;
  border-top: 1px solid rgba(86, 64, 43, 0.12);
  background: rgba(255, 250, 242, 0.72);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.book-description-body p {
  margin: 0;
  line-height: 1.8;
}

.book-toc {
  margin-top: 14px;
}

.book-toc summary {
  cursor: pointer;
  color: var(--accent-dark);
  font-weight: 700;
}

.book-toc summary::marker {
  color: var(--accent-dark);
}

.book-toc-body {
  margin-top: 10px;
  padding: 14px 16px;
  max-height: 18rem;
  overflow: auto;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(86, 64, 43, 0.12);
  background: rgba(255, 255, 255, 0.56);
}

.book-toc-text {
  margin: 0;
  white-space: pre-wrap;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: 0.92rem;
  line-height: 1.72;
}

.book-price {
  margin: 0;
  color: var(--accent-dark);
  font-weight: 700;
}

.book-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.book-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.book-links a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration-thickness: 2px;
}

.support-card {
  padding: 28px;
  border-radius: var(--radius-md);
}

.site-footer {
  padding: 32px 0 56px;
}

.footer-grid {
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  padding: 28px;
  border-radius: var(--radius-lg);
  background: rgba(34, 32, 30, 0.92);
  color: rgba(255, 250, 242, 0.94);
}

.footer-title {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.footer-subtitle {
  color: rgba(255, 215, 188, 0.92);
}

.footer-links a {
  color: inherit;
}

.header-copy,
.hero-panel,
.note-card,
.news-card,
.quick-card,
.tier-group,
.code-card,
.support-card,
.subpage-copy,
.page-card,
.info-box,
.footer-grid {
  animation: rise-in 560ms ease both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .header-main,
  .intro-grid,
  .section-heading,
  .directory-grid,
  .support-grid,
  .footer-grid,
  .subpage-hero,
  .subpage-note-grid,
  .portal-map-layout {
    grid-template-columns: 1fr;
  }

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

  .news-grid,
  .quick-grid,
  .tier-grid,
  .page-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .step-grid,
  .action-banner-grid,
  .book-grid,
  .library-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .portal-map-guide {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding-top: 16px;
  }

  .header-copy,
  .hero-panel,
  .note-card,
  .news-card,
  .quick-card,
  .tier-card,
  .code-card,
  .support-card,
  .subpage-copy,
  .page-card,
  .info-box,
  .footer-grid {
    padding: 22px;
  }

  .section {
    padding: 56px 0;
  }

  .global-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 6px;
  }

  .global-nav a {
    white-space: nowrap;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .portal-symbol-banner img {
    width: min(220px, 100%);
  }

  .news-grid,
  .quick-grid,
  .tier-grid,
  .event-year-grid,
  .download-button-grid,
  .lesson-video-grid,
  .page-grid,
  .subpage-note-grid,
  .info-pair,
  .step-grid,
  .action-banner-grid,
  .book-grid,
  .library-grid,
  .scholar-grid {
    grid-template-columns: 1fr;
  }

  .tier-group summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .decade-summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .decade-summary::after {
    align-self: flex-start;
  }

  .year-summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .year-summary::after {
    align-self: flex-start;
  }

  .year-body .tier-layout-half {
    grid-template-columns: 1fr;
  }

  .lesson-video-links {
    grid-template-columns: 1fr;
  }

  .portal-map-frame iframe {
    height: 420px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}