:root{
  --bg-0:#07070A; --bg-1:#0F1115; --bg-2:#14161C;
  --line:rgba(255,255,255,0.08); --line-strong:rgba(255,255,255,0.14);
  --text:#F5F6F8; --text-soft:#9aa0ad; --text-mute:#5d6470;
  --accent:#3b82f6; --accent-soft:#60a5fa; --accent-glow:rgba(59,130,246,0.45);
  --radius:14px; --maxw:1100px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg-0);color:var(--text)}
body{font-family:'Space Grotesk',system-ui,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
svg{display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.container-narrow{max-width:760px}
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:500;letter-spacing:0.18em;text-transform:uppercase;color:var(--text-soft)}
.eyebrow .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent-glow);margin-right:10px;vertical-align:middle;transform:translateY(-1px)}
h1,h2,h3{font-weight:500;letter-spacing:-0.02em;line-height:1.15;text-wrap:balance}
.arrow{transition:transform .25s ease;display:inline-block}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:18px 32px;display:flex;align-items:center;justify-content:space-between;transition:background .4s,backdrop-filter .4s,border-color .4s;border-bottom:1px solid transparent}
.nav.scrolled{padding:12px 32px;background:rgba(7,7,10,.65);backdrop-filter:blur(20px) saturate(140%);-webkit-backdrop-filter:blur(20px) saturate(140%);border-bottom-color:var(--line)}
.logo{display:flex;align-items:center;gap:10px;font-weight:500;font-size:17px}
.logo-mark{width:28px;height:28px;position:relative;display:inline-flex}
.logo-mark::after{content:'';position:absolute;top:2px;right:2px;width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent-glow),0 0 4px var(--accent)}
.logo-mark svg{width:100%;height:100%}
.nav-links{display:flex;gap:32px;font-size:14px;color:var(--text-soft)}
.nav-links a:hover{color:var(--text)}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border:1px solid var(--line-strong);border-radius:999px;font-size:13px;font-weight:500;background:rgba(255,255,255,.02)}
.nav-cta:hover{background:rgba(255,255,255,.06)}
.nav-cta:hover .arrow{transform:translateX(3px)}

/* blog index hero */
.blog-hero{padding:160px 0 56px}
.blog-hero h1{font-size:clamp(40px,5.4vw,68px);font-weight:400;letter-spacing:-0.035em;margin:22px 0 20px}
.blog-hero p{color:var(--text-soft);font-size:18px;max-width:600px}

/* cluster + cards */
.cluster{padding:36px 0}
.cluster .eyebrow{display:block;margin-bottom:24px}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:900px){.post-grid{grid-template-columns:1fr}}
.post-card{display:flex;flex-direction:column;gap:12px;padding:28px;border-radius:var(--radius);border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.025),rgba(255,255,255,.004));transition:border-color .3s,transform .3s}
.post-card:hover{border-color:rgba(255,255,255,.16);transform:translateY(-2px)}
.post-card-cluster{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--accent-soft)}
.post-card h3{font-size:19px;line-height:1.25}
.post-card p{font-size:14px;color:var(--text-soft);flex:1}
.post-card-meta{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.06em;color:var(--text-mute);display:flex;justify-content:space-between;align-items:center}
.post-card:hover .arrow{transform:translateX(3px)}

/* post */
.post{padding:140px 0 40px}
.crumbs{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.06em;color:var(--text-mute);margin-bottom:24px;display:flex;gap:8px;flex-wrap:wrap}
.crumbs a:hover{color:var(--text)}
.post h1{font-size:clamp(34px,4.6vw,54px);font-weight:400;letter-spacing:-0.03em;margin:18px 0 0}
.post-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.06em;color:var(--text-mute);align-items:center}
.post-meta .sep{opacity:.5}
.post-body{margin-top:48px}
.post-body p{color:#c8ccd4;font-size:17px;line-height:1.8;margin:0 0 22px}
.post-body h2{font-size:28px;font-weight:500;letter-spacing:-0.02em;margin:48px 0 18px}
.post-body h3{font-size:21px;font-weight:500;margin:34px 0 14px}
.post-body ul,.post-body ol{margin:0 0 22px;padding-left:22px;color:#c8ccd4}
.post-body li{margin-bottom:10px;line-height:1.7}
.post-body a{color:var(--accent-soft);text-decoration:underline;text-underline-offset:2px;text-decoration-color:rgba(96,165,250,.4)}
.post-body a:hover{text-decoration-color:var(--accent-soft)}
.post-body strong{color:var(--text);font-weight:600}
.post-body blockquote{border-left:3px solid var(--accent);padding:6px 0 6px 22px;margin:0 0 22px;color:var(--text);font-size:19px}
.post-body table{width:100%;border-collapse:collapse;margin:0 0 26px;font-size:15px}
.post-body th,.post-body td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);color:#c8ccd4}
.post-body th{color:var(--text-mute);font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase}
.post-body .key-box{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;margin:0 0 26px}
.post-body .key-box strong{color:var(--accent-soft)}

/* faq */
.post-faq{margin:56px 0 0}
.post-faq h2{font-size:26px;font-weight:500;margin-bottom:18px}
.faq-item{border:1px solid var(--line);border-radius:10px;margin-bottom:10px;background:rgba(255,255,255,.02)}
.faq-item summary{padding:16px 18px;cursor:pointer;font-weight:500;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';color:var(--accent-soft);font-size:1.2rem}
.faq-item[open] summary::after{content:'\2212'}
.faq-item .faq-answer{padding:0 18px 16px;color:var(--text-soft);font-size:15px;line-height:1.7}

/* cta + author */
.post-cta{margin:56px 0 0;padding:34px;border-radius:var(--radius);border:1px solid rgba(96,165,250,.35);background:linear-gradient(180deg,rgba(59,130,246,.1),rgba(59,130,246,.015))}
.post-cta h3{font-size:22px;margin-bottom:10px}
.post-cta p{color:var(--text-soft);font-size:15px;margin-bottom:20px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;font-size:14px;font-weight:500;border-radius:999px}
.btn-primary{background:var(--text);color:var(--bg-0)}
.btn-primary:hover .arrow{transform:translateX(3px)}
.author-box{display:flex;gap:16px;align-items:flex-start;margin:40px 0 0;padding-top:28px;border-top:1px solid var(--line)}
.author-avatar{width:44px;height:44px;border-radius:50%;background:var(--bg-2);border:1px solid var(--line-strong);display:grid;place-items:center;font-weight:600;color:var(--accent-soft);flex-shrink:0}
.author-box strong{font-size:14px}
.author-box p{font-size:13px;color:var(--text-mute);margin-top:4px;line-height:1.6}
.author-box .author-role{color:var(--text-mute);font-weight:400;font-size:13px}
.author-box a,.post-meta a{color:var(--accent-soft)}
.author-box a:hover,.post-meta a:hover{text-decoration:underline}
.related{margin:64px 0 0}
.related h2{font-size:24px;font-weight:500;margin-bottom:20px}

/* footer */
.footer{border-top:1px solid var(--line);padding:72px 0 36px;background:var(--bg-0);margin-top:80px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:56px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer-brand p{font-size:14px;color:var(--text-soft);max-width:320px;margin-top:16px}
.footer-col h4{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-mute);margin-bottom:18px;font-weight:500}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-soft)}
.footer-col a:hover{color:var(--text)}
.legal{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-mute);line-height:1.7;max-width:820px;margin-bottom:28px}
.footer-bottom{display:flex;justify-content:space-between;padding-top:28px;border-top:1px solid var(--line);font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.12em;color:var(--text-mute);text-transform:uppercase}
@media(max-width:760px){.nav-links{display:none}.post{padding:120px 0 40px}}