/* Blog DuoMind — GEO-ready, light theme, accent vert #107229 */
:root{
  --green:#107229; --green-dark:#0b5720; --green-soft:#059669;
  --ink:#15201a; --muted:#586660; --line:#e6ebe7; --bg:#ffffff; --bg-soft:#f6f9f7;
  --max:760px; --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:17px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}

/* Header */
.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:980px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:18px}
.brand .dot{width:11px;height:11px;border-radius:50%;background:var(--green);display:inline-block}
.brand small{font-weight:500;color:var(--muted);font-size:12px}
.nav a{color:var(--muted);font-weight:600;font-size:14px;margin-left:18px}
.nav a:hover{color:var(--green)}

/* Article */
article{padding:40px 0 8px}
.eyebrow{color:var(--green-soft);font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase}
h1{font-size:clamp(28px,4.6vw,42px);line-height:1.18;font-weight:800;margin:.4em 0 .3em;letter-spacing:-.01em}
.meta{color:var(--muted);font-size:14px;margin-bottom:8px}
article h2{font-size:clamp(22px,3vw,28px);font-weight:750;margin:1.7em 0 .5em;letter-spacing:-.01em}
article h3{font-size:20px;font-weight:700;margin:1.4em 0 .4em}
article p{margin:.7em 0}
article ul,article ol{padding-left:1.3em;margin:.6em 0}
article li{margin:.35em 0}
article strong{color:var(--green-dark)}
article blockquote{border-left:3px solid var(--green);margin:1em 0;padding:.2em 1em;color:var(--muted);background:var(--bg-soft);border-radius:0 8px 8px 0}
article table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:15px}
article th,article td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
article th{background:var(--bg-soft);font-weight:700}
article code{background:var(--bg-soft);padding:2px 6px;border-radius:6px;font-size:.9em}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* FAQ */
.faq{margin:2.4em 0}
.faq h2{margin-bottom:.6em}
.faq details{border:1px solid var(--line);border-radius:10px;padding:0 16px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--green);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .a{padding:12px 0 16px;color:var(--ink)}

/* CTA */
.cta{margin:2.6em 0;padding:26px;border-radius:var(--radius);background:linear-gradient(135deg,#0b5720,#107229);color:#fff;text-align:center}
.cta h3{color:#fff;margin:0 0 .3em;font-size:22px}
.cta p{margin:.2em 0 1em;opacity:.9}
.cta a.btn{display:inline-block;background:#fff;color:var(--green-dark);font-weight:800;padding:12px 24px;border-radius:999px}
.cta a.btn:hover{text-decoration:none;transform:translateY(-1px)}

/* Hub / listing */
.hero{padding:54px 0 30px;text-align:center}
.hero p.lead{color:var(--muted);font-size:19px;max-width:620px;margin:.6em auto 0}
.cards{display:grid;gap:18px;padding:10px 0 40px}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.15s;background:#fff}
.card:hover{border-color:var(--green);box-shadow:0 6px 22px rgba(16,114,41,.08);transform:translateY(-2px)}
.card .eyebrow{font-size:12px}
.card h2{font-size:21px;margin:.3em 0 .35em;line-height:1.3}
.card h2 a{color:var(--ink)}
.card h2 a:hover{color:var(--green);text-decoration:none}
.card p{color:var(--muted);margin:.2em 0 0;font-size:15px}
.card .date{color:var(--muted);font-size:13px;margin-top:12px}

/* Footer */
.site-footer{border-top:1px solid var(--line);margin-top:30px;padding:30px 0;color:var(--muted);font-size:14px}
.site-footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;max-width:980px}
.site-footer a{color:var(--muted)}
.back{display:inline-block;margin:24px 0;color:var(--muted);font-weight:600}
@media(max-width:640px){body{font-size:16px}.nav a{margin-left:12px}}