:root{
  --bg:#06070b; --bg2:#0a0c12; --surface:#0e1018; --surface2:#13161f;
  --line:#1c1f2b; --line2:#272b3a; --txt:#eef2f9; --mut:#9aa6bb; --faint:#6c7689;
  --c1:#2dd4a7; --c2:#1fbfd6; --c3:#3a9bf0; --gold:#f5c062;
  --grad:linear-gradient(115deg,#2dd4a7,#1fbfd6 60%,#3a9bf0);
  --maxw:760px; --r:16px;
}
*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0; background:var(--bg); color:var(--txt);
  font-family:"Satoshi",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:18px; line-height:1.72; -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(31,191,214,.10), transparent 60%),
    radial-gradient(760px 480px at -6% 4%, rgba(45,212,167,.08), transparent 58%);
  background-attachment:fixed;
}
a{ color:var(--c2); text-decoration:none; }
a:hover{ text-decoration:underline; }
h1,h2,h3,h4{ font-family:"Clash Display",sans-serif; font-weight:600; letter-spacing:-.02em; line-height:1.12; color:#fff; }
.g{ background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; }

/* header */
.nav{ position:sticky; top:0; z-index:30; backdrop-filter:blur(14px);
  background:rgba(6,7,11,.72); border-bottom:1px solid var(--line); }
.nav .in{ max-width:1080px; margin:0 auto; padding:14px 22px; display:flex; align-items:center; gap:18px; }
.brand{ display:flex; align-items:center; gap:10px; font-family:"Clash Display",sans-serif; font-weight:600; font-size:19px; color:#fff; }
.brand svg{ width:26px; height:26px; }
.nav .sp{ flex:1; }
.nav .lk{ color:var(--mut); font-size:15px; }
.nav .lk:hover{ color:#fff; text-decoration:none; }
.btn{ display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-weight:700; font-size:15px; border-radius:11px; padding:10px 18px; cursor:pointer; border:0;
  background:var(--grad); color:#04130f; }
.btn:hover{ filter:brightness(1.06); text-decoration:none; }
.btn.ghost{ background:transparent; color:var(--txt); border:1px solid var(--line2); }

/* shell */
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 22px; }
main{ padding:44px 0 80px; }

/* article header */
.eyebrow{ font-size:12.5px; font-weight:700; letter-spacing:.15em; text-transform:uppercase; color:#7fe3cf; }
.post-head{ margin:8px 0 30px; }
.post-head h1{ font-size:clamp(32px,5.4vw,50px); margin:14px 0 14px; }
.post-meta{ color:var(--faint); font-size:14.5px; display:flex; flex-wrap:wrap; gap:8px 16px; align-items:center; }
.post-meta .dot{ width:4px; height:4px; border-radius:50%; background:var(--line2); }
.lede{ font-size:21px; line-height:1.6; color:var(--mut); margin:22px 0 0; }
.hr{ height:1px; background:var(--line); border:0; margin:34px 0; }

/* prose */
.prose h2{ font-size:27px; margin:46px 0 14px; }
.prose h3{ font-size:21px; margin:32px 0 10px; color:#eef2f9; }
.prose p{ margin:0 0 18px; color:#d7deea; }
.prose strong{ color:#fff; }
.prose ul,.prose ol{ margin:0 0 18px; padding-left:22px; color:#d7deea; }
.prose li{ margin:0 0 9px; }
.prose li::marker{ color:var(--c1); }
.prose a{ border-bottom:1px solid rgba(31,191,214,.4); }
.prose blockquote{ margin:26px 0; padding:4px 0 4px 22px; border-left:3px solid var(--c1);
  color:#e7ecf5; font-size:20px; font-style:italic; }
.prose code{ font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:15px;
  background:var(--surface2); border:1px solid var(--line); border-radius:6px; padding:2px 6px; color:#bfeede; }
.prose pre{ background:var(--surface); border:1px solid var(--line); border-radius:12px; padding:16px 18px;
  overflow:auto; margin:0 0 18px; }
.prose pre code{ background:none; border:0; padding:0; color:#d7deea; font-size:14.5px; line-height:1.6; }
.figure{ margin:26px 0; }

/* callout / table */
.note{ background:var(--surface); border:1px solid var(--line); border-left:3px solid var(--gold);
  border-radius:12px; padding:16px 18px; margin:26px 0; color:#e7ecf5; font-size:16.5px; }
.note b{ color:#fff; }
table{ width:100%; border-collapse:collapse; margin:24px 0; font-size:16px; }
th,td{ text-align:left; padding:11px 13px; border-bottom:1px solid var(--line); vertical-align:top; }
th{ color:#fff; font-weight:700; background:var(--surface); }
td{ color:#d7deea; }

/* CTA */
.cta{ margin:40px 0; border-radius:18px; padding:26px 26px; position:relative; overflow:hidden;
  background:linear-gradient(140deg, rgba(45,212,167,.10), rgba(58,155,240,.08));
  border:1px solid var(--line2); }
.cta h3{ font-size:22px; margin:0 0 8px; }
.cta p{ color:var(--mut); margin:0 0 16px; font-size:16.5px; }
.cta .row{ display:flex; gap:12px; flex-wrap:wrap; align-items:center; }
.cta .fine{ color:var(--faint); font-size:13.5px; }

/* index cards */
.hero-blog{ padding:18px 0 10px; }
.hero-blog h1{ font-size:clamp(34px,6vw,54px); margin:10px 0 12px; }
.hero-blog p{ color:var(--mut); font-size:19px; max-width:600px; }
.cards{ display:grid; gap:18px; margin:34px 0 0; }
.card{ display:block; background:var(--surface); border:1px solid var(--line); border-radius:var(--r);
  padding:24px 24px; transition:border-color .18s, transform .18s; }
.card:hover{ border-color:var(--line2); transform:translateY(-2px); text-decoration:none; }
.card .cat{ font-size:12px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:#7fe3cf; }
.card h2{ font-size:23px; margin:10px 0 8px; }
.card p{ color:var(--mut); font-size:16px; margin:0 0 14px; }
.card .read{ color:var(--c2); font-size:14.5px; font-weight:600; }

/* related */
.related{ margin-top:50px; }
.related h3{ font-size:16px; text-transform:uppercase; letter-spacing:.1em; color:var(--faint); margin:0 0 16px; }
.related a{ display:block; padding:14px 0; border-top:1px solid var(--line); color:#eef2f9; font-weight:600; font-size:17px; }
.related a:hover{ color:var(--c2); text-decoration:none; }

/* newsletter */
.news{ margin:34px 0 0; padding:26px; border-radius:18px; border:1px solid var(--line2);
  background:linear-gradient(140deg, rgba(45,212,167,.08), rgba(58,155,240,.06)); }
.news h3{ font-size:21px; margin:0 0 6px; }
.news p{ color:var(--mut); font-size:15.5px; margin:0 0 16px; }
.news-form{ display:flex; gap:10px; flex-wrap:wrap; }
.news-form input{ flex:1; min-width:200px; background:var(--surface); border:1px solid var(--line2); color:var(--txt);
  border-radius:12px; padding:13px 16px; font:inherit; font-size:16px; }
.news-form input:focus{ outline:none; border-color:var(--c1); }
.news-form .btn{ border:0; cursor:pointer; white-space:nowrap; }
.news-msg{ margin-top:12px; font-size:14px; min-height:18px; }
.news-msg.ok{ color:var(--c1); } .news-msg.err{ color:#ff6b6b; }

/* footer */
footer{ border-top:1px solid var(--line); padding:30px 0; color:var(--faint); font-size:14px; }
footer .in{ max-width:1080px; margin:0 auto; padding:0 22px; display:flex; flex-wrap:wrap; gap:8px 18px; align-items:center; }
footer a{ color:var(--mut); }
footer .sp{ flex:1; }

@media(max-width:600px){
  body{ font-size:17px; }
  .nav .lk{ display:none; }
  .prose h2{ font-size:24px; }
}