/**
 * World Fact Compass — 記事共通スタイル
 * /world/articles/*.html, /japan/articles/*.html で共有
 *
 * 使い方: <body class="article-page world"> or <body class="article-page japan">
 */

:root {
  --bg: #f8fafb;
  --text: #1e293b;
  --text2: #64748b;
  --text3: #94a3b8;
  --border: #e2e8f0;
  --border-soft: #f1f5f9;
  --card: #ffffff;
  --world: #2563eb;
  --world-soft: #eff6ff;
  --japan: #c41e3a;
  --japan-soft: #fef2f2;
}

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

.article-page {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}

.article-page a {
  color: var(--world);
  text-decoration: none;
}
.article-page.japan a { color: var(--japan); }
.article-page a:hover { text-decoration: underline; }

/* ===== HEADER ===== */
.article-page .site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px; background: #fff; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.article-page .site-logo {
  font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: -.5px;
}
.article-page .site-logo span { color: var(--world); }
.article-page.japan .site-logo span { color: var(--japan); }

.article-page .header-nav {
  display: flex; align-items: center; gap: 12px;
}
.article-page .header-link {
  font-size: 13px; color: var(--text2); font-weight: 500;
  padding: 4px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: #fff; transition: all .2s; text-decoration: none;
}
.article-page .header-link:hover { border-color: var(--world); color: var(--world); text-decoration: none; }
.article-page.japan .header-link:hover { border-color: var(--japan); color: var(--japan); }

.article-page .lang-toggle,
.article-page .furigana-toggle {
  font-size: 13px; color: var(--text2); cursor: pointer;
  padding: 4px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: #fff; transition: all .2s; font-family: inherit;
}
.article-page .furigana-toggle { font-weight: 600; min-width: 36px; }
.article-page .furigana-toggle:hover { border-color: var(--world); color: var(--world); }
.article-page.japan .furigana-toggle:hover { border-color: var(--japan); color: var(--japan); }
.article-page .furigana-toggle.active {
  background: var(--world); color: #fff; border-color: var(--world);
}
.article-page.japan .furigana-toggle.active {
  background: var(--japan); border-color: var(--japan);
}

/* ===== RUBY / FURIGANA ===== */
/* デフォルトはOFF: rt(ふりがな)を非表示にする */
.article-page rt { display: none; }
/* トグルONのときだけ表示 */
.article-page.furigana-on rt {
  display: ruby-text;
  font-size: 0.5em; color: var(--text2); font-weight: 400;
  line-height: 1; letter-spacing: 0;
}
/* ON時は行間を少し広げて、ふりがなが上にはみ出してもレイアウト崩れないように */
.article-page.furigana-on .article-body p,
.article-page.furigana-on .article-body li,
.article-page.furigana-on .article-lead,
.article-page.furigana-on .article-title {
  line-height: 2.2;
}
.article-page.furigana-on .article-body h2,
.article-page.furigana-on .article-body h3 {
  line-height: 1.8;
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  max-width: 920px; margin: 0 auto; padding: 20px 24px 0;
  font-size: 13px; color: var(--text2);
}
.breadcrumb a { color: var(--text2); }
.breadcrumb a:hover { color: var(--world); }
.article-page.japan .breadcrumb a:hover { color: var(--japan); }
.breadcrumb .sep { margin: 0 8px; color: var(--text3); }
.breadcrumb .current { color: var(--text); }

/* ===== ARTICLE ===== */
.article {
  max-width: 720px; margin: 0 auto; padding: 24px;
}

.article-header {
  padding: 28px 0 24px; border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.article-tag {
  display: inline-block; font-size: 11px; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  padding: 4px 10px; border-radius: 99px; margin-bottom: 16px;
  background: var(--world-soft); color: var(--world);
}
.article-page.japan .article-tag { background: var(--japan-soft); color: var(--japan); }

.article-title {
  font-size: clamp(24px, 4vw, 34px); font-weight: 800;
  line-height: 1.4; letter-spacing: -.3px; margin-bottom: 16px;
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 16px;
  font-size: 13px; color: var(--text2); margin-bottom: 16px;
}
.article-meta .dot { color: var(--text3); }
.article-lead {
  font-size: 17px; color: var(--text); line-height: 1.8;
  padding: 20px; background: #fff; border-left: 3px solid var(--world);
  border-radius: 4px; margin-top: 12px;
}
.article-page.japan .article-lead { border-left-color: var(--japan); }

/* ===== BODY ===== */
.article-body h2 {
  font-size: clamp(20px, 2.8vw, 24px); font-weight: 700;
  margin: 48px 0 16px; padding-top: 16px;
  border-top: 2px solid var(--border);
  line-height: 1.4;
}
.article-body h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }

.article-body h3 {
  font-size: 18px; font-weight: 700;
  margin: 32px 0 12px; line-height: 1.4;
}

.article-body p {
  font-size: 16px; margin-bottom: 18px;
  line-height: 1.9;
}

.article-body ul, .article-body ol {
  margin: 0 0 18px 24px; font-size: 16px; line-height: 1.9;
}
.article-body li { margin-bottom: 6px; }

.article-body strong { font-weight: 700; color: var(--text); }
.article-body em { font-style: normal; background: linear-gradient(transparent 65%, #fef08a 65%); padding: 0 2px; }

.article-body code {
  font-family: 'SF Mono', Consolas, monospace; font-size: 14px;
  background: var(--border-soft); padding: 2px 6px; border-radius: 4px;
}

.article-body blockquote {
  border-left: 4px solid var(--border);
  padding: 8px 20px; margin: 24px 0;
  color: var(--text2); font-style: italic;
}

/* ===== FIGURES / TABLES ===== */
.article-body figure {
  margin: 24px -12px; background: var(--card);
  border: 1px solid var(--border); border-radius: 8px;
  overflow: hidden;
}
.article-body figure img {
  width: 100%; height: auto; display: block;
}
.article-body figure figcaption {
  padding: 10px 16px; font-size: 13px; color: var(--text2);
  background: var(--border-soft); border-top: 1px solid var(--border);
}

.article-body .data-table {
  width: 100%; border-collapse: collapse;
  font-size: 14px; margin: 20px 0;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
}
.article-body .data-table th {
  background: var(--border-soft); padding: 10px 14px;
  text-align: left; font-weight: 700; font-size: 12px;
  text-transform: uppercase; letter-spacing: .5px;
  color: var(--text2); border-bottom: 2px solid var(--border);
}
.article-body .data-table td {
  padding: 10px 14px; border-bottom: 1px solid var(--border-soft);
}
.article-body .data-table tr:last-child td { border-bottom: none; }
.article-body .data-table .highlight { background: var(--world-soft); font-weight: 600; }
.article-page.japan .article-body .data-table .highlight { background: var(--japan-soft); }

/* ===== TRY IT (CTA to tool) ===== */
.try-it {
  background: linear-gradient(135deg, var(--world-soft), #f0fdf4);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 24px; margin: 32px 0; text-align: center;
}
.article-page.japan .try-it {
  background: linear-gradient(135deg, var(--japan-soft), #fff7ed);
}
.try-it h3 {
  font-size: 17px; margin: 0 0 8px; border: none; padding: 0;
}
.try-it p {
  font-size: 14px; color: var(--text2); margin-bottom: 16px;
}
.try-it .btn-primary {
  display: inline-block; padding: 12px 28px;
  font-size: 15px; font-weight: 700; color: #fff;
  background: var(--world); border-radius: 8px;
  text-decoration: none; transition: all .2s;
  box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
}
.article-page.japan .try-it .btn-primary {
  background: var(--japan);
  box-shadow: 0 4px 12px rgba(196, 30, 58, .25);
}
.try-it .btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, .3);
  text-decoration: none;
}

/* ===== ARTICLE FOOTER ===== */
.article-footer {
  margin-top: 48px; padding-top: 32px;
  border-top: 1px solid var(--border);
}
.article-footer h3 {
  font-size: 14px; font-weight: 700; color: var(--text2);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px;
}
.related-list {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 12px;
}
.related-list a {
  display: block; padding: 14px 18px; border-radius: 8px;
  background: var(--card); border: 1px solid var(--border);
  transition: all .2s;
}
.related-list a:hover {
  border-color: var(--world); transform: translateX(4px); text-decoration: none;
}
.article-page.japan .related-list a:hover { border-color: var(--japan); }
.related-list .related-id {
  font-size: 11px; color: var(--text3); font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase;
}
.related-list .related-title {
  font-size: 15px; color: var(--text); font-weight: 600; margin-top: 4px;
}

/* ===== SITE FOOTER ===== */
.article-page .site-footer {
  padding: 40px 24px 32px; text-align: center;
  border-top: 1px solid var(--border); color: var(--text2); font-size: 12px;
  max-width: 800px; margin: 40px auto 0;
}
.article-page .site-footer .footer-nav {
  display: flex; justify-content: center; gap: 24px; margin-bottom: 16px; flex-wrap: wrap;
}
.article-page .site-footer .footer-nav a {
  color: var(--text2); font-size: 13px; font-weight: 500;
}
.article-page .site-footer .footer-copy { color: var(--text3); }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .article-page .site-header { padding: 12px 16px; }
  .article { padding: 20px 16px; }
  .article-body figure { margin: 20px -8px; }
  .try-it { padding: 20px 16px; }
  .article-body p, .article-body ul, .article-body ol { font-size: 15px; }
}

/* ===== GLOSSARY: term links + tooltip ===== */
.article-body a.term {
  color: inherit; text-decoration: none;
  border-bottom: 1.5px dotted var(--world); cursor: help;
}
.article-page.japan .article-body a.term { border-bottom-color: var(--japan); }
.article-body a.term:hover, .article-body a.term:focus-visible {
  background: var(--world-soft); border-bottom-style: solid; outline: none;
}
.term-tip {
  position: absolute; z-index: 1000; max-width: 320px;
  background: var(--card); color: var(--text);
  border: 1px solid var(--border); border-left: 3px solid var(--world);
  border-radius: 8px; box-shadow: 0 8px 24px rgba(15, 23, 42, .14);
  padding: 10px 14px; font-size: 13px; line-height: 1.7;
}
.term-tip[hidden] { display: none; }
.term-tip-name { font-weight: 700; font-size: 14px; }
.term-tip-en { color: var(--text3); font-size: 11px; margin-bottom: 4px; }
.term-tip p { margin: 0 0 6px; }
.term-tip-more { color: var(--world); font-weight: 600; font-size: 12px; text-decoration: none; }
.term-tip-more:hover { text-decoration: underline; }

/* ===== GLOSSARY PAGES ===== */
.glossary-cats { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; }
.glossary-cats a {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--card);
  color: var(--text); text-decoration: none; font-size: 14px;
}
.glossary-cats a span { font-size: 12px; color: var(--text3); }
.glossary-cats a:hover { border-color: var(--world); color: var(--world); }
.glossary-cat { scroll-margin-top: 80px; }
.glossary-table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.6; background: var(--card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.glossary-table { table-layout: fixed; }
.glossary-table th:nth-child(1) { width: 24%; }
.glossary-table th:nth-child(2) { width: 22%; }
.glossary-table .gt-term, .glossary-table .gt-en { white-space: normal !important; }
.glossary-table th { text-align: left; font-size: 12px; font-weight: 600; color: var(--text2); background: var(--border-soft); padding: 6px 12px; }
.glossary-table td { padding: 7px 12px; border-top: 1px solid var(--border-soft); vertical-align: top; }
.glossary-table tr:hover td { background: var(--world-soft); }
.glossary-table .gt-term { white-space: nowrap; font-weight: 600; }
.glossary-table .gt-term a { color: var(--world); text-decoration: none; }
.glossary-table .gt-term a:hover { text-decoration: underline; }
.glossary-table .gt-en { color: var(--text2); font-size: 12px; white-space: nowrap; }
.glossary-table .gt-short { color: var(--text); }
@media (max-width: 640px) {
  .glossary-table thead { display: none; }
  .glossary-table tr { display: block; padding: 8px 12px; border-top: 1px solid var(--border-soft); }
  .glossary-table td { display: block; padding: 0; border: none; }
  .glossary-table .gt-en { margin-bottom: 2px; }
}
.glossary-abbr { font-size: .7em; color: var(--text2); font-weight: 600; margin-left: 4px; }
.glossary-short { font-weight: 600; }
.glossary-related span { color: var(--text2); font-size: 14px; }
.glossary-sources { font-size: 14px; }
.glossary-back { margin-top: 32px; font-size: 14px; }
