:root{
  --bg:#0A0B0F;
  --surface:#13151B;
  --surface-2:#1A1D28;
  --border:#23273A;
  --border-soft:#1A1E2B;
  --text:#F2F3F7;
  --text-dim:#9598A6;
  --text-dimmer:#6A6D7B;
  --accent:#FF5A1F;
  --accent-soft:rgba(255,90,31,0.10);
  --success:#4ADE80;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{background:var(--bg);scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Geist',-apple-system,BlinkMacSystemFont,sans-serif;
  font-weight:400;
  font-size:16px;
  line-height:1.65;
  letter-spacing:-0.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--text);text-decoration:none;border-bottom:1px solid var(--border);transition:border-color .15s,color .15s;}
a:hover{color:var(--accent);border-bottom-color:var(--accent);}
.container{max-width:780px;margin:0 auto;padding:0 28px;}
.container-wide{max-width:1280px;margin:0 auto;padding:0 28px;}

/* nav */
.nav-wrap{
  position:sticky;top:0;
  background:rgba(10,11,15,0.85);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--border-soft);
  z-index:50;
}
nav{padding:16px 0;}
nav .inner{display:flex;align-items:center;justify-content:space-between;gap:32px;}
.logo{display:flex;align-items:center;gap:10px;border-bottom:none;}
.logo:hover{border-bottom:none;color:var(--text);}
.logo-mark{
  font-family:'Geist',sans-serif;
  font-weight:700;
  font-size:21px;
  color:var(--text);
  letter-spacing:-0.025em;
}
.logo-mark .dot{color:var(--accent);}
.nav-links{display:flex;gap:30px;align-items:center;}
.nav-links a{color:var(--text-dim);font-size:14px;font-weight:500;border-bottom:none;}
.nav-links a:hover{color:var(--text);border-bottom:none;}
.btn{
  padding:9px 16px;font-size:13.5px;font-weight:600;
  display:inline-flex;align-items:center;gap:6px;
  transition:all .18s;border-radius:6px;border:1px solid transparent;
  border-bottom:1px solid transparent !important;
}
.btn-primary{background:var(--accent);color:#0A0B0F;border-color:var(--accent);}
.btn-primary:hover{background:#ff6c35;border-color:#ff6c35;color:#0A0B0F;}

/* page */
.page-head{
  padding:80px 0 48px;
  border-bottom:1px solid var(--border-soft);
  margin-bottom:48px;
}
.page-head .eyebrow{
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:12px;font-weight:500;color:var(--accent);
  text-transform:uppercase;letter-spacing:0.06em;
  margin-bottom:12px;
}
.page-head h1{
  font-family:'Geist',sans-serif;
  font-weight:600;
  font-size:clamp(36px,4.5vw,52px);
  line-height:1.1;
  letter-spacing:-0.03em;
  color:var(--text);
  margin-bottom:16px;
}
.page-head .lede{
  font-size:17px;
  color:var(--text-dim);
  line-height:1.5;
}
.page-head .meta{
  margin-top:24px;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:12.5px;
  color:var(--text-dimmer);
  letter-spacing:0.02em;
}
.page-head .meta strong{color:var(--text-dim);font-weight:500;}

/* content */
.prose{padding-bottom:96px;}
.prose h2{
  font-family:'Geist',sans-serif;
  font-weight:600;
  font-size:24px;
  line-height:1.25;
  letter-spacing:-0.022em;
  color:var(--text);
  margin:48px 0 16px;
}
.prose h2:first-child{margin-top:0;}
.prose h3{
  font-family:'Geist',sans-serif;
  font-weight:600;
  font-size:18px;
  letter-spacing:-0.015em;
  color:var(--text);
  margin:28px 0 10px;
}
.prose p{
  font-size:15.5px;
  line-height:1.65;
  color:var(--text-dim);
  margin-bottom:14px;
}
.prose p strong{color:var(--text);font-weight:500;}
.prose ul, .prose ol{
  margin:0 0 18px 0;
  padding-left:24px;
  color:var(--text-dim);
}
.prose li{font-size:15.5px;line-height:1.65;margin-bottom:6px;}
.prose li::marker{color:var(--accent);}
.prose code{
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:13.5px;
  color:var(--accent);
  background:var(--accent-soft);
  padding:1px 6px;
  border-radius:3px;
}
.prose blockquote{
  margin:24px 0;
  padding:16px 20px;
  background:var(--surface);
  border-left:3px solid var(--accent);
  border-radius:4px;
  color:var(--text);
  font-size:15px;
  line-height:1.6;
}
.prose .callout{
  margin:24px 0;
  padding:20px 24px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:8px;
}
.prose .callout strong{color:var(--text);font-weight:600;}
.prose .callout p:last-child{margin-bottom:0;}

/* tables */
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:20px 0;
  font-size:14.5px;
}
.prose th, .prose td{
  text-align:left;
  padding:12px 14px;
  border-bottom:1px solid var(--border-soft);
  vertical-align:top;
}
.prose th{
  font-weight:600;
  color:var(--text);
  background:var(--surface);
  font-size:13px;
  text-transform:uppercase;
  letter-spacing:0.04em;
}
.prose td{color:var(--text-dim);}

/* TOC */
.toc{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:8px;
  padding:20px 24px;
  margin-bottom:48px;
}
.toc h4{
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:0.08em;
  color:var(--text-dimmer);
  margin-bottom:14px;
  font-weight:600;
}
.toc ol{list-style:none;padding:0;margin:0;counter-reset:tocitem;}
.toc li{
  counter-increment:tocitem;
  padding:5px 0;
  font-size:14px;
}
.toc li::before{
  content:counter(tocitem, decimal-leading-zero) ".";
  display:inline-block;
  width:32px;
  color:var(--text-dimmer);
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:12px;
}
.toc a{color:var(--text-dim);border-bottom:none;transition:color .15s;}
.toc a:hover{color:var(--accent);border-bottom:none;}

/* footer */
footer{
  border-top:1px solid var(--border);
  padding:48px 0 28px;
  background:var(--bg);
}
.foot-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  flex-wrap:wrap;
}
.foot-row .links{display:flex;gap:24px;flex-wrap:wrap;}
.foot-row a{color:var(--text-dim);font-size:13.5px;border-bottom:none;}
.foot-row a:hover{color:var(--text);border-bottom:none;}
.foot-row .copy{color:var(--text-dimmer);font-size:12.5px;}

@media (max-width:640px){
  .container,.container-wide{padding:0 18px;}
  .page-head{padding:48px 0 32px;}
  .nav-links{display:none;}
}