/* General Intelligence Systems — shared styles */
:root{
  --bg:#09090f; --bg2:#0f0f18; --bg3:#13131f; --surface:#1a1a28;
  --border:rgba(255,255,255,0.08); --border2:rgba(255,255,255,0.12);
  --text:#f1f1f4; --text2:#8b8b9e; --text3:#55556a;
  --blue:#4f8ef7; --blue-light:#7aaeff;
  --blue-dim:rgba(79,142,247,0.1); --blue-border:rgba(79,142,247,0.25);
  --gold:#d4a017; --good:#6abd7a;
  --f-sans:'Inter', system-ui, -apple-system, sans-serif;
  --f-mono:'Geist Mono', 'SF Mono', monospace;
  --r:8px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--f-sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:60px;display:flex;align-items:center;padding:0 32px;background:rgba(9,9,15,0.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;margin-right:auto}
.nav-logomark{width:28px;height:28px;background:var(--blue);border-radius:6px;display:grid;place-items:center;font-family:var(--f-mono);font-size:11px;font-weight:500;color:#fff;letter-spacing:-0.04em;flex-shrink:0}
.nav-name{font-size:14px;font-weight:500;color:var(--text);letter-spacing:-0.01em}
.nav-name .crumb{color:var(--text3);font-weight:400}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{font-size:14px;color:var(--text2);text-decoration:none;padding:6px 14px;border-radius:6px;transition:color .15s, background .15s}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,0.05)}
.nav-links a.active{color:var(--text);background:rgba(255,255,255,0.05)}
.nav-cta{margin-left:12px;font-size:13px;font-weight:500;color:#fff;background:var(--blue);text-decoration:none;padding:7px 18px;border-radius:6px;transition:opacity .15s;white-space:nowrap}
.nav-cta:hover{opacity:.85}

/* Section shell */
.section{padding:88px 32px}
.section--alt{background:var(--bg2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.wrap{max-width:1120px;margin:0 auto}
.section-kicker{font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;color:var(--blue);text-transform:uppercase;margin-bottom:12px}
.section-heading{font-size:clamp(24px,3vw,36px);font-weight:600;letter-spacing:-0.025em;color:var(--text);line-height:1.15;margin-bottom:16px}
.section-sub{font-size:16px;font-weight:300;color:var(--text2);max-width:640px;line-height:1.7}

/* Footer */
.footer{background:var(--bg2);border-top:1px solid var(--border);padding:52px 32px 28px}
.footer-inner{max-width:1120px;margin:0 auto}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid var(--border);margin-bottom:28px}
.footer-brand p{font-size:13px;color:var(--text3);line-height:1.7;margin-top:10px;max-width:260px}
.footer-col h4{font-size:11px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--text3);margin-bottom:14px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-col ul li a{font-size:13px;color:var(--text2);text-decoration:none;transition:color .12s}
.footer-col ul li a:hover{color:var(--text)}
.footer-address{font-size:12px;color:var(--text3);line-height:1.8;margin-top:16px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-copy{font-size:12px;color:var(--text3)}
.footer-online{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text3)}
.online-dot{width:6px;height:6px;border-radius:50%;background:#4ade80;animation:blink 2.5s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.4}}

/* Blog list */
.blog-hero{padding:140px 32px 64px;max-width:1120px;margin:0 auto}
.blog-hero h1{font-size:clamp(36px,4.5vw,56px);font-weight:600;line-height:1.1;letter-spacing:-0.03em;margin-bottom:20px;max-width:760px}
.blog-hero p{font-size:17px;font-weight:300;color:var(--text2);max-width:580px;line-height:1.75}
.blog-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;max-width:1120px;margin:0 auto;padding:0 32px 96px}
.bcard{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:28px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:14px;transition:border-color .2s, box-shadow .2s, transform .18s}
.bcard:hover{border-color:var(--blue-border);box-shadow:0 0 0 1px rgba(79,142,247,0.07), 0 12px 32px rgba(0,0,0,0.3);transform:translateY(-2px)}
.bcard-tag{font-family:var(--f-mono);font-size:10px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:100px;background:var(--blue-dim);border:1px solid var(--blue-border);color:var(--blue-light);align-self:flex-start}
.bcard-title{font-size:20px;font-weight:600;letter-spacing:-0.02em;line-height:1.25}
.bcard-desc{font-size:14px;font-weight:300;color:var(--text2);line-height:1.65;flex:1}
.bcard-meta{display:flex;justify-content:space-between;align-items:center;font-family:var(--f-mono);font-size:11px;color:var(--text3);padding-top:14px;border-top:1px solid var(--border)}

/* Article */
.article-wrap{max-width:760px;margin:0 auto;padding:140px 32px 96px}
.article-tag{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;color:var(--blue-light);text-transform:uppercase;margin-bottom:18px}
.article-title{font-size:clamp(32px,4vw,48px);font-weight:600;letter-spacing:-0.03em;line-height:1.1;margin-bottom:20px}
.article-lede{font-size:18px;font-weight:300;color:var(--text2);line-height:1.7;margin-bottom:28px}
.article-meta{display:flex;gap:14px;font-family:var(--f-mono);font-size:11px;color:var(--text3);padding-bottom:32px;border-bottom:1px solid var(--border);margin-bottom:40px}
.article-body{font-size:16px;line-height:1.8;color:var(--text2);font-weight:400}
.article-body h2{font-size:24px;font-weight:600;color:var(--text);margin:48px 0 16px;letter-spacing:-0.02em;line-height:1.25}
.article-body h3{font-size:18px;font-weight:600;color:var(--text);margin:36px 0 12px;letter-spacing:-0.01em}
.article-body p{margin-bottom:18px}
.article-body ul,.article-body ol{margin:0 0 22px 22px}
.article-body li{margin-bottom:8px}
.article-body strong{color:var(--text);font-weight:500}
.article-body a{color:var(--blue-light);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(122,174,255,0.35);transition:text-decoration-color .15s}
.article-body a:hover{text-decoration-color:var(--blue-light)}
.article-body blockquote{border-left:2px solid var(--blue-border);padding:6px 0 6px 20px;margin:24px 0;color:var(--text2);font-style:italic}
.article-body code{font-family:var(--f-mono);font-size:13px;background:var(--bg3);padding:2px 6px;border-radius:4px;color:var(--blue-light);border:1px solid var(--border)}
.article-body pre{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:16px 18px;overflow-x:auto;margin:20px 0}
.article-body pre code{background:none;border:none;padding:0;color:var(--text)}

.related{max-width:760px;margin:0 auto;padding:0 32px 72px}
.related h3{font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;color:var(--blue);text-transform:uppercase;margin-bottom:18px}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.related a{display:block;padding:16px 18px;background:var(--bg2);border:1px solid var(--border);border-radius:8px;text-decoration:none;color:var(--text);transition:border-color .15s, background .15s}
.related a:hover{border-color:var(--blue-border);background:var(--bg3)}
.related-title{font-size:14px;font-weight:500;line-height:1.4;margin-bottom:4px}
.related-meta{font-family:var(--f-mono);font-size:10px;color:var(--text3)}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;padding:0 32px 96px;display:flex;flex-direction:column;gap:10px}
.faq{background:var(--bg2);border:1px solid var(--border);border-radius:10px;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:18px;font-size:15px;font-weight:500;color:var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-family:var(--f-mono);color:var(--text3);font-size:18px;flex-shrink:0;transition:transform .15s}
.faq[open] summary::after{content:'−'}
.faq[open] summary{border-bottom:1px solid var(--border)}
.faq-body{padding:18px 22px;color:var(--text2);font-size:14px;line-height:1.7}
.faq-body p+p{margin-top:12px}
.faq-body a{color:var(--blue-light);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(122,174,255,0.35)}

/* Responsive */
@media (max-width:880px){
  .nav{padding:0 20px}
  .nav-links{display:none}
  .section{padding:64px 20px}
  .blog-hero{padding:108px 20px 48px}
  .blog-grid{grid-template-columns:1fr;padding:0 20px 72px}
  .article-wrap{padding:108px 20px 72px}
  .related{padding:0 20px 56px}
  .related-grid{grid-template-columns:1fr}
  .faq-list{padding:0 20px 72px}
  .footer{padding:40px 20px 24px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:480px){
  .nav-name{display:none}
  .footer-top{grid-template-columns:1fr}
}