/* AI Studio Blog — SEO/AEO/GEO optimized design system */
:root{
  --bg:#0A0A0B;
  --surface:#111113;
  --surface-2:#17171A;
  --border:#242428;
  --text:#EDEDEF;
  --text-muted:#A1A1A6;
  --accent:#25D366;
  --accent-dim:#1FBA5A;
  --success:#4ADE80;
  --radius:12px;
  --radius-lg:20px;
  --max-w:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .15s}
a:hover{border-color:var(--accent)}

/* ——— HEADER / NAV ——— */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(10,10,11,0.85);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.nav{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;
}
.logo{
  font-weight:800;font-size:20px;color:var(--text);
  display:flex;align-items:center;gap:8px;border:0;
}
.logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 16px var(--accent);
}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{color:var(--text-muted);font-size:14px;border:0}
.nav-links a:hover{color:var(--text)}
.nav-cta{
  background:var(--accent);color:#fff !important;
  padding:9px 16px;border-radius:999px;font-weight:600;font-size:14px;border:0;
}
.nav-cta:hover{background:var(--accent-dim);color:#fff !important;border:0}
.nav-links a.active{color:var(--text)}
.nav-wa{
  display:inline-flex;align-items:center;gap:6px;
  color:#25d366 !important;font-size:14px;font-weight:500;border:0;
}
.nav-wa:hover{color:#25d366 !important;opacity:.85;border:0}
.nav-wa svg{flex-shrink:0}

/* ——— ARTICLE CONTAINER ——— */
main{max-width:var(--max-w);margin:0 auto;padding:48px 24px 80px}
article header.post-header{margin-bottom:40px}
.breadcrumbs{
  font-size:13px;color:var(--text-muted);margin-bottom:24px;
}
.breadcrumbs a{color:var(--text-muted);border:0}
.breadcrumbs a:hover{color:var(--accent)}
.post-category{
  display:inline-block;background:var(--surface-2);
  color:var(--accent);font-size:12px;font-weight:600;
  padding:6px 12px;border-radius:999px;text-transform:uppercase;
  letter-spacing:0.04em;margin-bottom:20px;
}
h1{
  font-size:44px;line-height:1.15;letter-spacing:-0.02em;
  font-weight:800;margin:0 0 20px;
}
.post-meta{
  display:flex;gap:16px;align-items:center;
  color:var(--text-muted);font-size:14px;margin-bottom:24px;
  flex-wrap:wrap;
}
.post-meta .dot{width:3px;height:3px;background:var(--text-muted);border-radius:50%}
.post-lede{
  font-size:20px;line-height:1.55;color:#D6D6DA;
  margin:24px 0 40px;font-weight:400;
}

/* ——— TOC ——— */
.toc{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px 24px;margin:32px 0 40px;
}
.toc-title{
  font-size:12px;font-weight:700;text-transform:uppercase;
  color:var(--text-muted);letter-spacing:0.08em;margin-bottom:12px;
}
.toc ol{margin:0;padding-left:20px}
.toc li{margin:6px 0;color:var(--text-muted)}
.toc a{color:var(--text);border:0;font-size:15px}
.toc a:hover{color:var(--accent)}

/* ——— PROSE ——— */
article h2{
  font-size:30px;line-height:1.25;letter-spacing:-0.01em;
  font-weight:700;margin:56px 0 16px;scroll-margin-top:80px;
}
article h3{
  font-size:22px;line-height:1.3;font-weight:700;
  margin:36px 0 12px;scroll-margin-top:80px;
}
article h4{
  font-size:18px;font-weight:700;margin:24px 0 8px;
}
article p{margin:0 0 18px;color:#D6D6DA}
article ul,article ol{margin:0 0 20px;padding-left:24px;color:#D6D6DA}
article li{margin:6px 0}
article strong{color:#FFF;font-weight:600}
article blockquote{
  border-left:3px solid var(--accent);
  padding:4px 0 4px 20px;margin:28px 0;
  color:#D6D6DA;font-style:italic;
}
article code{
  background:var(--surface-2);padding:2px 6px;
  border-radius:4px;font-size:0.9em;color:var(--accent);
  font-family:'SF Mono','Menlo',monospace;
}
article pre{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px 20px;
  overflow-x:auto;margin:24px 0;
}
article pre code{background:none;padding:0;color:#D6D6DA}
article table{
  width:100%;border-collapse:collapse;margin:24px 0;
  background:var(--surface);border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);font-size:15px;
}
article th,article td{
  padding:12px 16px;text-align:left;
  border-bottom:1px solid var(--border);
}
article th{
  background:var(--surface-2);color:var(--text);
  font-weight:600;text-transform:uppercase;font-size:12px;letter-spacing:0.05em;
}
article tr:last-child td{border-bottom:0}
article hr{
  border:0;height:1px;background:var(--border);margin:40px 0;
}

/* ——— STAT BLOCK (GEO citation bait) ——— */
.stat-block{
  background:linear-gradient(135deg,var(--surface) 0%,var(--surface-2) 100%);
  border:1px solid var(--border);border-left:4px solid var(--accent);
  border-radius:var(--radius);padding:24px 28px;margin:32px 0;
}
.stat-block .stat{
  font-size:40px;font-weight:800;color:var(--accent);
  line-height:1;margin-bottom:8px;letter-spacing:-0.02em;
}
.stat-block .stat-label{color:#D6D6DA;font-size:16px;margin-bottom:6px}
.stat-block .stat-source{color:var(--text-muted);font-size:12px}

/* ——— KEY TAKEAWAYS (AEO) ——— */
.key-takeaways{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:28px 32px;margin:32px 0 40px;
}
.key-takeaways h2{
  font-size:18px !important;margin:0 0 16px !important;
  text-transform:uppercase;letter-spacing:0.06em;color:var(--accent);
}
.key-takeaways ul{margin:0;padding-left:20px}
.key-takeaways li{margin:8px 0;color:#D6D6DA;font-size:16px}

/* ——— FAQ ——— */
.faq{margin:56px 0 40px}
.faq h2{margin-bottom:24px}
.faq-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px 24px;margin-bottom:12px;
}
.faq-item h3{
  font-size:18px !important;margin:0 0 10px !important;color:#FFF;
}
.faq-item p{margin:0;color:#D6D6DA;font-size:16px}

/* ——— CTA BLOCK ——— */
.cta-block{
  background:linear-gradient(135deg,#FFE500 0%,#FFD400 100%);
  color:#0A0A0B;border-radius:var(--radius-lg);
  padding:40px 36px;margin:48px 0;text-align:center;
}
.cta-block h2{
  color:#0A0A0B !important;margin:0 0 12px !important;font-size:28px !important;
}
.cta-block p{color:#1A1A1A;margin:0 0 24px;font-size:17px;font-weight:500}
.cta-button{
  display:inline-block;background:#0A0A0B;color:#FFE500 !important;
  padding:14px 32px;border-radius:999px;font-weight:700;
  border:0;font-size:16px;transition:transform .15s;
}
.cta-button:hover{transform:translateY(-2px);border:0}

/* ——— AUTHOR BOX ——— */
.author-box{
  display:flex;gap:16px;align-items:center;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;margin:40px 0 24px;
}
.author-avatar{
  width:56px;height:56px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),#0EA25B);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:20px;flex-shrink:0;
}
.author-info{flex:1}
.author-name{font-weight:700;color:#FFF;font-size:15px}
.author-bio{color:var(--text-muted);font-size:14px;margin-top:2px}

/* ——— RELATED POSTS ——— */
.related{
  margin:56px 0 0;padding-top:40px;border-top:1px solid var(--border);
}
.related h2{font-size:22px !important;margin:0 0 20px !important}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.related-card{
  display:block;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;transition:border-color .2s;
}
.related-card:hover{border-color:var(--accent)}
.related-card .r-cat{
  color:var(--accent);font-size:11px;font-weight:600;
  text-transform:uppercase;letter-spacing:0.06em;margin-bottom:8px;
}
.related-card .r-title{color:#FFF;font-size:16px;font-weight:600;line-height:1.35}

/* ——— FOOTER ——— */
.site-footer{
  border-top:1px solid var(--border);
  background:var(--surface);
  padding:56px 24px 32px;
  color:var(--text-muted);font-size:14px;
  margin-top:40px;
}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;margin-bottom:40px;
}
.footer-brand{max-width:320px}
.footer-brand .logo{margin-bottom:12px;display:inline-flex}
.footer-brand p{margin:12px 0 16px;color:var(--text-muted);line-height:1.55}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:36px;height:36px;border-radius:50%;
  background:var(--surface-2);border:1px solid var(--border);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-muted);border:1px solid var(--border);
  transition:all .15s;
}
.footer-social a:hover{color:var(--accent);border-color:var(--accent)}
.footer-col h4{
  font-size:12px;font-weight:700;text-transform:uppercase;
  letter-spacing:0.08em;color:#FFF;margin:0 0 16px;
}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin:8px 0}
.footer-col a{color:var(--text-muted);font-size:14px;border:0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:24px;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:16px;color:var(--text-muted);font-size:13px;
}
.footer-bottom a{color:var(--text-muted);border:0}
.footer-bottom a:hover{color:var(--accent)}
@media (max-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
}

/* ——— WHATSAPP FLOATING CTA ——— */
.wa-float{
  position:fixed;right:20px;bottom:20px;z-index:9999;
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 18px 12px 14px;
  background:#25d366;color:#fff !important;
  border-radius:999px;text-decoration:none;border:0;
  font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  font-weight:600;font-size:14px;line-height:1;
  box-shadow:0 6px 16px rgba(37,211,102,.35);
  transition:transform .2s ease,box-shadow .2s ease;
}
.wa-float:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 22px rgba(37,211,102,.45);
  border:0;
}
.wa-float svg{flex-shrink:0}
.wa-label{white-space:nowrap}
@media (max-width:640px){
  .wa-float{padding:14px;border-radius:50%}
  .wa-label{display:none}
}

/* ——— INDEX / HUB PAGE ——— */
.hero{text-align:center;padding:80px 24px 40px;max-width:820px;margin:0 auto}
.hero h1{font-size:56px;letter-spacing:-0.03em}
.hero p{font-size:20px;color:var(--text-muted);max-width:620px;margin:16px auto 0}
.filter-bar{
  max-width:1200px;margin:40px auto 24px;padding:0 24px;
  display:flex;gap:10px;flex-wrap:wrap;justify-content:center;
}
.filter-chip{
  background:var(--surface);border:1px solid var(--border);
  color:var(--text-muted);padding:8px 16px;border-radius:999px;
  font-size:14px;cursor:pointer;transition:all .15s;border:1px solid var(--border);
}
.filter-chip:hover,.filter-chip.active{
  background:var(--accent);color:#fff;border-color:var(--accent);
}
.posts-grid{
  max-width:1200px;margin:0 auto;padding:24px;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;
}
.post-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:28px;
  transition:transform .2s,border-color .2s;
  display:flex;flex-direction:column;
}
.post-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.post-card .p-cat{
  color:var(--accent);font-size:11px;font-weight:700;
  text-transform:uppercase;letter-spacing:0.08em;margin-bottom:12px;
}
.post-card h2{
  font-size:20px !important;line-height:1.3;margin:0 0 12px !important;color:#FFF;
}
.post-card p{color:var(--text-muted);font-size:14px;flex:1;margin:0 0 16px}
.post-card .read-more{color:var(--accent);font-size:14px;font-weight:600;border:0}

/* ——— MOBILE ——— */
@media (max-width:640px){
  h1{font-size:32px}
  .hero h1{font-size:40px}
  article h2{font-size:24px}
  article h3{font-size:19px}
  main{padding:32px 20px 60px}
  body{font-size:16px}
  .nav-links a:not(.nav-cta){display:none}
  .posts-grid{grid-template-columns:1fr;padding:20px}
}