:root{
  --bg:#0A0E14; --surface:#12171F; --surface-2:#1A212B; --border:#232B36;
  --text:#E6EBF2; --text-muted:#7C8798; --text-dim:#4B5563;
  --mint:#6EE7C0; --mint-dim:#3FA98A; --amber:#F2A65A; --danger:#E8746E;
  --mono: ui-monospace,"SF Mono","Cascadia Mono","Consolas","Liberation Mono",monospace;
  --sans: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --radius:10px;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg); color:var(--text); font-family:var(--sans); font-size:16px; line-height:1.7; -webkit-font-smoothing:antialiased; overflow-x:hidden;}
a{color:var(--mint); text-decoration:none;}
a:hover{text-decoration:underline;}
.wrap{max-width:820px; margin:0 auto; padding:0 24px;}
a:focus-visible,button:focus-visible{outline:2px solid var(--mint); outline-offset:3px;}

/* nav */
header.topbar{position:sticky; top:0; z-index:50; backdrop-filter:blur(10px); background:rgba(10,14,20,0.72); border-bottom:1px solid var(--border);}
header.topbar .wrap{max-width:1120px;}
nav.top{display:flex; align-items:center; justify-content:space-between; padding:16px 0;}
.logo{font-family:var(--mono); font-weight:600; font-size:17px;}
.logo span{color:var(--mint);}
.navlinks{display:flex; gap:26px; font-size:14px; color:var(--text-muted); align-items:center;}
.navlinks a{color:var(--text-muted);}
.navlinks a:hover{color:var(--text); text-decoration:none;}
.btn-nav{font-family:var(--mono); font-size:13.5px; padding:8px 16px; border:1px solid var(--mint-dim); border-radius:7px; color:var(--mint);}
.btn-nav:hover{background:var(--mint); color:#08110D; text-decoration:none;}
@media(max-width:640px){ .navlinks a.hide-sm{display:none;} }

/* article */
main{padding:44px 0 60px;}
.eyebrow{font-family:var(--mono); font-size:12px; color:var(--amber); letter-spacing:0.10em; text-transform:uppercase; margin-bottom:14px;}
.breadcrumb{font-family:var(--mono); font-size:12.5px; color:var(--text-dim); margin-bottom:18px;}
.breadcrumb a{color:var(--text-muted);}
h1{font-size:34px; line-height:1.2; letter-spacing:-0.01em; margin-bottom:16px;}
.meta-row{font-family:var(--mono); font-size:12.5px; color:var(--text-dim); margin-bottom:28px;}
.tldr{background:rgba(110,231,192,0.06); border:1px solid var(--mint-dim); border-radius:var(--radius); padding:18px 20px; margin:0 0 34px; font-size:16.5px; line-height:1.6;}
.tldr strong{color:var(--mint); font-family:var(--mono); font-size:12px; letter-spacing:0.08em; text-transform:uppercase; display:block; margin-bottom:8px;}
.prose h2{font-size:24px; margin:38px 0 14px; letter-spacing:-0.01em;}
.prose h3{font-size:18.5px; margin:28px 0 10px; color:var(--text);}
.prose p{margin:0 0 16px; color:#D4DBE6;}
.prose ul,.prose ol{margin:0 0 18px 22px;}
.prose li{margin:0 0 8px; color:#D4DBE6;}
.prose strong{color:var(--text);}
.prose a{color:var(--mint);}
.prose code{font-family:var(--mono); font-size:13.5px; background:var(--surface-2); border:1px solid var(--border); border-radius:5px; padding:2px 6px; color:var(--mint);}
.prose pre{background:#0d1219; border:1px solid var(--border); border-radius:var(--radius); padding:16px 18px; overflow-x:auto; margin:0 0 20px;}
.prose pre code{background:none; border:none; padding:0; color:#D4DBE6;}
.prose table{width:100%; border-collapse:collapse; font-size:14.5px; margin:0 0 22px; display:block; overflow-x:auto;}
.prose th{text-align:left; font-family:var(--mono); font-size:12px; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.04em; padding:10px 14px; border-bottom:1px solid var(--border);}
.prose td{padding:12px 14px; border-bottom:1px solid var(--border); color:#D4DBE6;}
.prose blockquote{border-left:2px solid var(--mint-dim); padding:4px 0 4px 18px; margin:0 0 20px; color:var(--text-muted);}

/* faq */
.faq{margin:44px 0 0;}
.faq h2{font-size:24px; margin-bottom:18px;}
.faq details{border-bottom:1px solid var(--border); padding:16px 0;}
.faq summary{cursor:pointer; font-weight:600; color:var(--text); list-style:none; font-size:16.5px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::before{content:"+ "; color:var(--mint); font-family:var(--mono);}
.faq details[open] summary::before{content:"– ";}
.faq .a{margin-top:12px; color:#D4DBE6;}

/* related + cta */
.related{margin:48px 0 0; border-top:1px solid var(--border); padding-top:26px;}
.related h2{font-size:18px; font-family:var(--mono); color:var(--text-muted); text-transform:uppercase; letter-spacing:0.06em; margin-bottom:14px;}
.related ul{list-style:none;}
.related li{margin-bottom:10px;}
.cta{margin:44px 0 0; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:26px 24px;}
.cta h3{font-size:19px; margin-bottom:8px;}
.cta p{color:var(--text-muted); margin-bottom:16px; font-size:15px;}
.cta a.btn{display:inline-block; font-family:var(--mono); font-size:14px; background:var(--mint); color:#08110D; padding:11px 22px; border-radius:8px; font-weight:600;}
.cta a.btn:hover{text-decoration:none; opacity:0.92;}

/* blog index */
.blog-hero{padding:48px 0 10px;}
.blog-hero h1{font-size:38px;}
.blog-hero p{color:var(--text-muted); max-width:640px; margin-top:10px;}
.cluster{margin:40px 0 0;}
.cluster > h2{font-family:var(--mono); font-size:14px; color:var(--mint); text-transform:uppercase; letter-spacing:0.06em; margin-bottom:16px; padding-bottom:10px; border-bottom:1px solid var(--border);}
.post-list{list-style:none;}
.post-list li{padding:14px 0; border-bottom:1px solid var(--border);}
.post-list a{color:var(--text); font-size:17px; font-weight:600;}
.post-list a:hover{color:var(--mint); text-decoration:none;}
.post-list .d{display:block; color:var(--text-muted); font-size:14px; margin-top:5px; font-weight:400;}

footer.app-footer{border-top:1px solid var(--border); padding:30px 0; color:var(--text-dim); font-size:13px; font-family:var(--mono); text-align:center; margin-top:60px;}
footer.app-footer a{color:var(--text-muted);}
@media(max-width:640px){ h1{font-size:27px;} .blog-hero h1{font-size:30px;} }