:root{
  --ink:#1a1a1a;
  --gray-900:#2b2b2b;
  --gray-700:#4a4a4a;
  --gray-500:#767676;
  --gray-300:#b8b8b8;
  --gray-200:#d9d9d9;
  --gray-100:#ececec;
  --gray-050:#f6f6f6;
  --paper:#ffffff;
  --accent:#1F3864;
  --accent-dim:#4a6491;
  --line:#c9c9c9;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:-apple-system,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic","Noto Sans JP",sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.85;
  font-size:16px;
  -webkit-text-size-adjust:100%;
}
h1,h2,h3,h4,h5{
  font-family:Georgia,"Hiragino Mincho ProN","Yu Mincho",serif;
  font-weight:700;
  line-height:1.5;
  color:var(--ink);
}
a{color:var(--accent); text-decoration:none;}
a:hover{text-decoration:underline;}
.wrap{max-width:720px; margin:0 auto; padding:0 20px;}

/* ---- header ---- */
.site-header{
  border-bottom:2px solid var(--ink);
  padding:18px 0;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}
.logo{
  font-family:Georgia,"Hiragino Mincho ProN","Yu Mincho",serif;
  font-weight:700;
  font-size:19px;
  color:var(--ink);
}
.logo:hover{text-decoration:none;}
.logo-dim{color:var(--gray-500);}
.site-nav{display:flex; flex-wrap:wrap; gap:2px 16px; font-size:14px;}
.site-nav a{color:var(--gray-700); padding:4px 0; border-bottom:2px solid transparent;}
.site-nav a.active, .site-nav a:hover{color:var(--accent); border-bottom-color:var(--accent); text-decoration:none;}

/* ---- main / general blocks ---- */
main.wrap{padding-top:36px; padding-bottom:64px; min-height:60vh;}

.page-title{font-size:28px; margin:0 0 10px;}
.page-title-en{font-size:14px; color:var(--gray-500); font-weight:400; margin-left:8px;}
.page-lead{color:var(--gray-700); font-size:15px; max-width:640px;}

.breadcrumb{font-size:12px; color:var(--gray-500); margin-bottom:10px;}
.breadcrumb a{color:var(--gray-500);}

.section-row{margin:44px 0; padding-top:24px; border-top:1px solid var(--gray-200);}
.section-row:first-child{border-top:none; padding-top:0;}
.section-h{
  font-size:18px;
  border-bottom:2px solid var(--ink);
  padding-bottom:8px;
  margin:0 0 18px;
}
.section-h-count{font-size:12px; color:var(--gray-500); font-weight:400;}
.section-h-small{font-size:13px; color:var(--gray-700); letter-spacing:0.04em; margin:0 0 10px; text-transform:uppercase;}
.section-lead{color:var(--gray-700); font-size:14px; margin-bottom:16px;}
.section-more{font-size:13px; text-align:right;}
.empty-note{color:var(--gray-500); font-size:14px; border:1px dashed var(--gray-300); padding:14px; background:var(--gray-050);}

/* ---- hero (top page) ---- */
.hero{
  background:var(--gray-050);
  border:1px solid var(--gray-200);
  border-left:4px solid var(--accent);
  padding:28px 24px;
  margin-bottom:8px;
}
.kicker{font-size:11px; letter-spacing:0.12em; color:var(--gray-500); margin:0 0 10px;}
.headline{font-size:22px; line-height:1.6; margin:0 0 14px;}
.hero-lead{color:var(--gray-700); font-size:14.5px; margin:0 0 18px;}
.cta-btn{
  display:inline-block;
  background:var(--ink);
  color:#fff;
  font-size:13px;
  padding:10px 20px;
  border-radius:2px;
}
.cta-btn:hover{background:var(--accent); text-decoration:none;}

/* ---- stats band ---- */
.stats-band{margin:0 0 34px;}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(128px, 1fr));
  gap:1px;
  background:var(--gray-300, #d0d0d0);
  border:1px solid var(--gray-300, #d0d0d0);
}
.stat-tile{
  display:flex; flex-direction:column; gap:4px;
  background:#fff;
  padding:18px 16px 14px;
  color:inherit;
}
.stat-tile:hover{background:#f5f6fa; text-decoration:none;}
.stat-tile:first-child{background:var(--accent); color:#fff;}
.stat-tile:first-child:hover{background:var(--ink);}
.stat-tile:first-child .stat-en{color:rgba(255,255,255,0.7);}
.stat-num{
  font-family:Georgia, "Times New Roman", serif;
  font-size:34px; line-height:1; font-weight:700;
  letter-spacing:-0.02em;
}
.stat-label{font-size:11.5px; letter-spacing:0.04em;}
.stat-en{color:var(--gray-500); font-size:10.5px;}
.stats-note{font-size:11px; color:var(--gray-500); margin:8px 0 0;}
@media (max-width:720px){
  .stat-grid{grid-template-columns:repeat(2, 1fr);}
  .stat-num{font-size:28px;}
}

/* ---- cards / grids ---- */
.card-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px;}
.article-card{
  display:block;
  border:1px solid var(--gray-300);
  padding:14px;
  color:var(--ink);
}
.article-card:hover{border-color:var(--accent); text-decoration:none;}
.article-card h3{font-size:15px; margin:8px 0 6px;}
.article-card p{font-size:12.5px; color:var(--gray-700); margin:0;}
.cat-tag{
  font-size:10px;
  background:var(--accent);
  color:#fff;
  padding:2px 8px;
  display:inline-block;
  letter-spacing:0.03em;
}

.cat-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:10px;}
.cat-tile{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:2px;
  border:1px solid var(--gray-300);
  text-align:center;
  padding:16px 6px;
  font-size:13px;
  color:var(--ink);
}
.cat-tile:hover{border-color:var(--accent); color:var(--accent); text-decoration:none;}
.cat-tile-en{font-size:10px; color:var(--gray-500);}

.db-highlight{display:flex; gap:8px; flex-wrap:wrap;}
.entity-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border:1px solid var(--gray-300);
  padding:6px 10px;
  font-size:12.5px;
  color:var(--ink);
  background:#fff;
}
.entity-chip:hover{border-color:var(--accent); text-decoration:none;}
.entity-chip-wide{min-width:0;}
.chip-code{
  font-family:"SFMono-Regular",Consolas,monospace;
  background:var(--gray-900);
  color:#fff;
  padding:1px 6px;
  font-size:10px;
  border-radius:2px;
}
.chip-en{color:var(--gray-500); font-size:11px;}

.type-nav{font-size:13px; color:var(--gray-500); margin:8px 0 30px;}

/* ---- article body ---- */
.article-meta{font-size:12.5px; color:var(--gray-500); margin-bottom:20px;}
.article h1{font-size:26px; margin-top:0;}
.article h2{font-size:20px; margin-top:40px;}
.article h3{font-size:16px; margin-top:28px;}
.article p{margin:16px 0; font-size:15.5px;}
.article ul, .article ol{margin:16px 0; padding-left:1.4em;}
.article li{margin-bottom:6px;}
.article hr{border:none; border-top:1px solid var(--gray-300); margin:32px 0;}
.article strong{color:var(--ink);}

.article-list-item{
  border:1px solid var(--gray-300);
  padding:16px;
  margin-bottom:14px;
}
.article-list-item h3{margin:8px 0 6px; font-size:16px;}
.article-list-item p{margin:0; font-size:13.5px; color:var(--gray-700);}
.concl-tag{
  font-size:10px;
  background:var(--gray-900);
  color:#fff;
  padding:1px 7px;
  display:inline-block;
}

/* ---- category page ---- */
.cat-body{display:block;}
.related-db-panel{
  border:1px solid var(--gray-300);
  padding:16px;
  margin-top:30px;
}

/* ---- db record page ---- */
.rec-kicker{font-size:11px; color:var(--gray-500); margin-bottom:6px;}
.rec-header{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px;
  border-bottom:2px solid var(--ink);
  padding-bottom:16px;
  margin-bottom:20px;
  flex-wrap:wrap;
}
.rec-title{font-size:24px; margin:0 0 4px;}
.rec-en{font-size:12.5px; color:var(--gray-500); margin:0;}
.confidence-badge{
  border:2px solid var(--ink);
  padding:6px 12px;
  font-size:13px;
  font-weight:700;
  text-align:center;
  white-space:nowrap;
}
.confidence-badge.conf-A{border-color:var(--accent); color:var(--accent);}
.conf-label{display:block; font-size:9.5px; font-weight:400; color:var(--gray-500);}
.conf-inline{font-size:10.5px; color:var(--gray-500); margin-left:6px;}

.field-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:var(--gray-200);
  border:1px solid var(--gray-200);
  margin-bottom:10px;
}
.field-cell{background:#fff; padding:14px;}
.field-cell .fname{font-size:10.5px; color:var(--gray-500); letter-spacing:0.04em; margin-bottom:6px;}
.field-cell.span2{grid-column:span 2;}
.field-note{color:var(--gray-500); font-size:12.5px;}
.confidence-explain .fname{color:var(--accent);}

.rec-body{display:block;}
.rec-side{border-top:1px solid var(--gray-200); padding-top:20px; margin-top:20px;}

.mini-tree{
  border:1px solid var(--gray-300);
  padding:14px;
  font-size:13px;
  background:var(--gray-050);
  margin-bottom:20px;
}
.mini-tree-row{display:flex; gap:8px; align-items:baseline; margin-bottom:8px; flex-wrap:wrap;}
.mini-tree-row:last-child{margin-bottom:0;}
.mini-tree-label{font-size:10.5px; color:var(--gray-500); min-width:110px; flex-shrink:0;}
.mini-empty{color:var(--gray-500); font-size:12.5px;}
.node-mini{
  display:inline-block;
  border:1px solid var(--gray-700);
  background:#fff;
  padding:2px 8px;
  border-radius:2px;
  font-size:12px;
  color:var(--ink);
}
.node-mini.self{background:var(--ink); color:#fff; font-weight:700; border-color:var(--ink);}

.related-articles-box{border:1px solid var(--gray-300); padding:12px; font-size:13px;}

.rel-detail-item{border:1px solid var(--gray-200); padding:12px 14px; margin-bottom:10px; font-size:13px;}
.rel-detail-head{margin:0 0 6px; font-size:13px;}
.rel-type-tag{
  font-size:10px;
  background:var(--gray-700);
  color:#fff;
  padding:1px 7px;
  margin-right:6px;
}
.rel-detail-desc{margin:0 0 6px; color:var(--gray-900);}
.rel-detail-meta{margin:0; color:var(--gray-500); font-size:11.5px;}

/* ---- proposals ---- */
.proposal-tabnav{display:flex; border-bottom:2px solid var(--ink); flex-wrap:wrap; margin-bottom:0;}
.proposal-tabnav .tab{
  flex:1 1 auto;
  text-align:center;
  padding:12px 8px;
  font-size:12.5px;
  border-right:1px solid var(--gray-300);
  color:var(--gray-500);
}
.proposal-intro{padding:18px 0; font-size:13.5px; color:var(--gray-700); border-bottom:1px solid var(--gray-200);}
.proposal-grid{display:grid; grid-template-columns:1fr; gap:16px;}
.proposal-card{border:1px dashed var(--gray-400); padding:16px; background:var(--gray-050);}
.proposal-card h3{font-size:14px; margin:10px 0 12px; color:var(--gray-500);}
.proposal-card .parts{display:grid; grid-template-columns:1fr 1fr; gap:8px;}
.part-block{border:1px dashed var(--gray-300); padding:8px; font-size:11.5px;}
.part-name{
  font-weight:700; color:#fff; background:var(--gray-700);
  display:inline-block; padding:1px 7px; margin-bottom:6px; font-size:10px;
}
.placeholder-text{color:var(--gray-500); margin:0;}

/* ---- footer ---- */
.site-footer{border-top:2px solid var(--ink); padding:28px 0; margin-top:40px;}
.footer-links{display:flex; gap:14px; flex-wrap:wrap; font-size:12.5px; margin-bottom:10px;}
.footer-links a{color:var(--gray-700);}
.copyright{font-size:11.5px; color:var(--gray-500); margin:0;}

/* ---- mobile ---- */
@media (max-width:720px){
  .card-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .field-grid{grid-template-columns:1fr;}
  .field-cell.span2{grid-column:span 1;}
  .proposal-card .parts{grid-template-columns:1fr;}
  .site-nav{font-size:13px; gap:2px 12px;}
}