:root{
  --bg:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:#e5e7eb;
  --brand:#111827;
  --link:#0f766e;
  --link-hover:#115e59;
  --card:#ffffff;
  --shadow: 0 1px 2px rgba(0,0,0,.06);
  --radius: 14px;
  --max: 980px;
  font-synthesis-weight: none;
}
*{box-sizing:border-box}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height:1.6;
}
a{color:var(--link);text-decoration:none}
a:hover{color:var(--link-hover);text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.site-header{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.brand{color:var(--brand);font-weight:800;letter-spacing:-.02em}
.nav{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.nav a{color:var(--text);opacity:.86}
.nav a:hover{opacity:1;text-decoration:none}
.affiliate-notice{background:#f8f9fa;padding:6px 0;text-align:center;border-bottom:1px solid var(--border)}
.affiliate-notice small{color:var(--muted);font-size:12px}
.affiliate-notice a{color:var(--link);font-size:12px}
.hero{padding:34px 0}
.hero h1{font-size:32px;line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}
.lead{color:var(--muted);margin:0;max-width:70ch}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.btn{display:inline-block;padding:10px 14px;border-radius:999px;border:1px solid var(--text);background:var(--text);color:#fff;font-weight:700}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
.btn-ghost{background:transparent;color:var(--text)}
.grid{padding:10px 0 30px}
.cards{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:12px;margin-top:10px}
@media(min-width:720px){.cards{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.card h3,.card h2{margin:0 0 6px;font-size:16px;line-height:1.35}
.card p{margin:0;color:var(--muted);font-size:14px}
.meta{margin-top:10px;color:var(--muted);font-size:12px}
.page-head{padding:22px 0 4px}
.post{padding:22px 0 30px}
.post-head h1{margin:0 0 6px;letter-spacing:-.02em}
.content{max-width:75ch}
.content h2{margin-top:26px}
.content table{border-collapse:collapse;width:100%}
.content th,.content td{border:1px solid var(--border);padding:10px;font-size:14px;vertical-align:top}
.content blockquote{border-left:4px solid var(--border);padding-left:12px;color:var(--muted);margin-left:0}
.site-footer{border-top:1px solid var(--border);padding:18px 0;color:var(--muted);font-size:13px}
.footer-inner{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.footer-links{display:flex;gap:12px;flex-wrap:wrap}