:root {
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #1d4ed8;
  --ok: #047857;
  --bad: #b91c1c;
  font-family: -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; color: var(--text); }

.back-link { color: var(--primary); text-decoration: none; font-size: 0.85rem; }

/* --- page --- */
.doc-page {
  max-width: 680px;
  margin: 24px auto;
  padding: 0 16px 60px;
}
.doc-page h1 { font-size: 1.2rem; margin: 8px 0 4px; }
.doc-page h2 { font-size: 1.02rem; margin: 30px 0 6px; border-top: 1px solid var(--border); padding-top: 18px; }
.doc-page h2:first-of-type { border-top: none; padding-top: 0; }
.doc-page h3 { font-size: 0.92rem; margin: 14px 0 4px; }
.doc-page p, .doc-page li { font-size: 0.9rem; line-height: 1.75; }
.doc-page ul { padding-left: 20px; }
.lead { color: var(--muted); font-size: 0.88rem; }

.about-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e3a8a;
  border-radius: 10px;
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 0.85rem;
  line-height: 1.75;
}
.about-box a { color: #1d4ed8; }

.scam-box {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  border-radius: 10px;
  padding: 14px 16px;
  margin: 16px 0;
  font-size: 0.87rem;
  line-height: 1.75;
}
.scam-box strong { color: #7f1d1d; }
.scam-box h3 { color: #7f1d1d; margin-top: 0; }

.org-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 10px;
  background: #fff;
}
.org-card h4 { margin: 0 0 4px; font-size: 0.92rem; }
.org-card .tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 1px 8px;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--primary);
  margin-left: 6px;
}
.org-card .meta { color: var(--muted); font-size: 0.82rem; margin: 4px 0; }
.org-card a.ext { font-size: 0.85rem; }

.updated-note {
  color: var(--muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--border);
  margin-top: 24px;
  padding-top: 10px;
}