:root {
  --kinari: #fffdf7;
  --cha: #2f7fa3;
  --matsu: #356f88;
  --sumi: #22303a;
  --usuzumi: #5b6b74;
  --waku: #d8e8ef;
  --paper: #fffdf7;
  --gold: #b8924b;
  --gold-bg: #fffcf4;
  --gold-border: #ead9ad;
  
  /* Ryuyo district color (used in index.html and updates.html) */
  --district-color: #1e5e9f;
  --district-soft: #f4f8fc;
  --district-line: #d8e6f0;
}

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

body {
  font-family: "Zen Kaku Gothic New", system-ui, sans-serif;
  color: var(--sumi);
  background: var(--kinari);
  line-height: 1.95;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cha);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.article-layout {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 22px 64px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--usuzumi);
  padding: 22px 0 8px;
  font-family: system-ui, -apple-system, sans-serif;
}

.breadcrumb a {
  color: var(--usuzumi);
}

.academic-article {
  margin-top: 10px;
}

.article-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--waku);
  padding-bottom: 24px;
}

.kicker {
  display: inline-block;
  font-size: 13px;
  color: var(--district-color);
  border-left: 3px solid var(--district-color);
  padding-left: 9px;
  margin: 10px 0;
  letter-spacing: .04em;
  font-weight: 700;
}

h1 {
  font-family: "Shippori Mincho", serif;
  font-weight: 700;
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1.45;
  color: var(--sumi);
  margin: 8px 0 16px;
  letter-spacing: .02em;
}

.lead {
  font-size: 17px;
  line-height: 1.95;
  color: #34424a;
  margin-top: 16px;
}

.academic-article h2 {
  font-family: "Shippori Mincho", serif;
  font-size: clamp(20px, 3.5vw, 24px);
  line-height: 1.5;
  margin: 44px 0 18px;
  border-bottom: 2px solid var(--waku);
  padding-bottom: 8px;
  color: var(--sumi);
}

.academic-article h3 {
  font-family: "Shippori Mincho", serif;
  font-size: 19px;
  margin: 32px 0 12px;
  color: var(--matsu);
}

.academic-article p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.95;
  text-align: justify;
}

/* Tables styling */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--waku);
  border-radius: 8px;
}

table.academic-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 500px;
  font-size: 14.5px;
  background: #fffdf8;
}

table.academic-table th,
table.academic-table td {
  border: 1px solid var(--waku);
  padding: 12px 14px;
  vertical-align: top;
  text-align: left;
}

table.academic-table th {
  background: var(--district-soft);
  color: var(--district-color);
  font-weight: 700;
  white-space: nowrap;
}

table.academic-table td {
  color: var(--sumi);
}

/* Note box */
.note-box {
  background: #fffdf4;
  border: 1px solid var(--gold-border);
  border-left: 4px solid var(--gold);
  border-radius: 6px;
  padding: 20px 24px;
  margin: 36px 0;
}

.note-box h2 {
  font-family: "Shippori Mincho", serif;
  font-size: 17px;
  margin: 0 0 10px;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--gold);
}

.note-box p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #5c4a2a;
}

/* Related links (cards) */
.related-links {
  background: var(--district-soft);
  border: 1px solid var(--district-line);
  border-radius: 8px;
  padding: 24px;
  margin: 40px 0;
}

.related-links h2 {
  font-family: "Shippori Mincho", serif;
  font-size: 18px;
  margin: 0 0 16px;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--district-color);
}

.related-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.related-card {
  background: #fff;
  border: 1px solid var(--district-line);
  border-radius: 6px;
  padding: 16px 18px;
  transition: transform 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: var(--cha);
}

.related-card .card-cat {
  font-size: 11px;
  color: var(--district-color);
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: 6px;
}

.related-card h3 {
  font-family: "Shippori Mincho", serif;
  font-size: 15px;
  line-height: 1.45;
  margin: 0 0 8px;
  color: var(--sumi);
}

.related-card p {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--usuzumi);
  margin: 0;
}

/* Reference box */
.reference-box {
  background: var(--paper);
  border: 1px solid var(--waku);
  border-radius: 8px;
  padding: 24px;
  margin: 44px 0 0;
}

.reference-box h2 {
  font-family: "Shippori Mincho", serif;
  font-size: 18px;
  margin: 0 0 12px;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--sumi);
}

.reference-box ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.reference-box li {
  font-size: 14.5px;
  color: var(--usuzumi);
  margin-bottom: 6px;
  line-height: 1.6;
}

.reference-box .note {
  font-size: 12.5px;
  color: var(--usuzumi);
  margin: 0;
  line-height: 1.6;
  border-left: 2px solid var(--waku);
  padding-left: 10px;
}

/* Back to top links */
.back-to-top {
  display: flex;
  justify-content: flex-start;
  margin-top: 32px;
}

.back-to-top a {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--matsu);
  padding: 8px 16px;
  border: 1px solid var(--waku);
  border-radius: 6px;
  background: #fff;
}

.back-to-top a:hover {
  background: var(--district-soft);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 700px) {
  body {
    font-size: 15.5px;
  }
  .article-layout {
    padding: 0 16px 48px;
  }
  .related-links {
    padding: 18px;
  }
  .related-links-grid {
    grid-template-columns: 1fr;
  }
  .reference-box {
    padding: 18px;
  }
}