:root{
  --bg:#07090d;
  --bg2:#0b0e14;
  --panel:#0c1017;
  --text:#f3f6fb;
  --muted:#9da8b8;
  --line:rgba(255,255,255,.09);
  --cyan:#65e7ff;
  --blue:#7aa2ff;
  --violet:#aa7cff;
  --green:#7df0c2;
  --shadow:0 24px 80px rgba(0,0,0,.45);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(90,130,255,.12), transparent 30%),
    radial-gradient(circle at 82% 22%, rgba(101,231,255,.09), transparent 28%),
    linear-gradient(180deg,var(--bg),var(--bg2) 55%,#080a0f);
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height:100vh;
  overflow-x:hidden;
  padding-top:64px; /* offset for the fixed nav bar */
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.28;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:48px 48px;
  mask-image:linear-gradient(to bottom, black, transparent 75%);
  z-index:0;
}

a{color:inherit;text-decoration:none}
main{position:relative;z-index:1}

.wrap{
  width:min(1080px, calc(100% - 40px));
  margin:0 auto;
}

/* ---------- Solid sticky nav ---------- */

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:50;
  background:rgba(8,11,16,.86);
  -webkit-backdrop-filter:blur(16px) saturate(1.4);
  backdrop-filter:blur(16px) saturate(1.4);
  border-bottom:1px solid var(--line);
}

.site-header .inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
}

.brand{
  display:flex;
  align-items:center;
  gap:11px;
  font-weight:800;
  letter-spacing:-.02em;
  font-size:17px;
}

.brand em{font-style:normal;color:#718096}

.brand-mark{
  width:32px;
  height:32px;
  border-radius:9px;
  overflow:hidden;
  flex:0 0 auto;
  background:linear-gradient(135deg,#eaf3fc,#cfe0ff);
  padding:3px;
  box-shadow:0 4px 18px rgba(101,231,255,.18);
}

.brand-mark img{
  width:100%;
  height:100%;
  display:block;
  object-fit:contain;
}

.site-nav{display:flex;gap:6px}

.site-nav a{
  padding:8px 15px;
  border-radius:10px;
  font-size:14px;
  font-weight:650;
  color:var(--muted);
  border:1px solid transparent;
  transition:.18s ease;
}

.site-nav a:hover{
  color:var(--text);
  background:rgba(255,255,255,.06);
}

.site-nav a.active{
  color:var(--text);
  background:rgba(255,255,255,.07);
  border-color:var(--line);
}

/* ---------- Homepage ---------- */

.hero{
  padding:88px 0 72px;
  text-align:center;
  display:flex;
  flex-direction:column;
  align-items:center;
}

.hero h1{margin:0 auto;max-width:none}

.hero .lead{margin-left:auto;margin-right:auto;max-width:960px}

.hero .cta-row{justify-content:center}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:#c7d1de;
  font-size:13px;
  font-weight:650;
  letter-spacing:.06em;
  text-transform:uppercase;
  margin-bottom:22px;
}

.eyebrow i{
  width:8px;height:8px;border-radius:50%;
  background:var(--green);
  box-shadow:0 0 18px rgba(125,240,194,.8);
}

h1{
  font-size:clamp(44px,7vw,80px);
  line-height:.98;
  letter-spacing:-.05em;
  margin:0;
  max-width:860px;
}

.gradient{
  background:linear-gradient(95deg,var(--cyan),var(--blue) 48%,var(--violet));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.lead{
  margin:26px 0 0;
  color:#aab4c3;
  font-size:clamp(17px,2vw,21px);
  line-height:1.55;
  max-width:680px;
}

.lead strong{color:#e7edf5;font-weight:650}

.cta-row{
  display:flex;
  gap:12px;
  margin-top:34px;
  flex-wrap:wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:0 22px;
  border-radius:12px;
  font-size:14px;
  font-weight:750;
  border:1px solid var(--line);
  transition:.2s ease;
}

.btn.primary{
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  color:#0a1118;
  border-color:transparent;
}

.btn.secondary{
  background:rgba(255,255,255,.035);
  color:#dce3ed;
}

.btn:hover{transform:translateY(-1px)}

section{
  padding:64px 0;
  border-top:1px solid rgba(255,255,255,.055);
}

.section-kicker{
  color:var(--cyan);
  text-transform:uppercase;
  letter-spacing:.12em;
  font-size:11px;
  font-weight:800;
}

h2{
  margin:12px 0 14px;
  font-size:clamp(28px,4vw,42px);
  line-height:1.06;
  letter-spacing:-.03em;
}

.series-grid{
  margin-top:32px;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
}

.series{
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.018));
  padding:22px;
  border-radius:18px;
  display:block;
  transition:.2s ease;
}

.series:hover{
  transform:translateY(-2px);
  border-color:rgba(101,231,255,.3);
}

.series small{
  color:#768397;
  font:11px ui-monospace,SFMono-Regular,Menlo,monospace;
  text-transform:uppercase;
  letter-spacing:.08em;
}

.series h3{
  margin:10px 0 8px;
  font-size:20px;
  letter-spacing:-.02em;
}

.series p{
  margin:0;
  color:#8d99aa;
  line-height:1.55;
  font-size:14px;
}

.latest-list{
  margin-top:32px;
  display:grid;
  gap:1px;
  border:1px solid var(--line);
  border-radius:18px;
  overflow:hidden;
  background:var(--line);
}

.latest{
  background:var(--panel);
  padding:19px 22px;
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:20px;
  transition:.15s ease;
}

.latest:hover{background:#111722}

.latest .t{
  font-size:15px;
  font-weight:650;
  letter-spacing:-.01em;
  color:#dde6f0;
}

.latest time{
  color:#768397;
  font:12px ui-monospace,SFMono-Regular,Menlo,monospace;
  white-space:nowrap;
}

.all-posts{
  margin-top:22px;
  display:inline-block;
  color:var(--cyan);
  font-size:14px;
  font-weight:700;
}

/* ---------- List pages ---------- */

.page{padding:56px 0 72px}

.page-head{margin-bottom:40px}

.page-head h1{font-size:clamp(36px,5vw,56px)}

.page-desc{
  margin:16px 0 0;
  color:var(--muted);
  font-size:17px;
  line-height:1.6;
  max-width:640px;
}

.post-list{
  display:grid;
  gap:14px;
}

.post-card{
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.015));
  border-radius:18px;
  padding:24px;
  transition:.2s ease;
}

.post-card:hover{
  transform:translateY(-2px);
  border-color:rgba(101,231,255,.3);
}

.card-link.has-cover{
  display:grid;
  grid-template-columns:1fr 230px;
  gap:24px;
  align-items:center;
}

.card-cover{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:12px;
  border:1px solid var(--line);
}

.post-card h2{
  margin:10px 0 8px;
  font-size:22px;
  letter-spacing:-.02em;
  line-height:1.2;
}

.post-card p{
  margin:0;
  color:#8d99aa;
  font-size:14px;
  line-height:1.6;
}

.post-meta{
  display:flex;
  align-items:baseline;
  gap:8px;
  flex-wrap:wrap;
  color:#768397;
  font:12px ui-monospace,SFMono-Regular,Menlo,monospace;
}

.series-tag{color:var(--cyan)}

.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}

.tag{
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:#9da8b8;
  padding:5px 11px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  transition:.15s ease;
}

.tag:hover{color:var(--text);border-color:rgba(101,231,255,.35)}

.tag em{font-style:normal;color:#5d6878;margin-left:4px}

.terms-cloud{margin-top:8px}

.pagination{
  margin-top:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.page-num{
  color:#768397;
  font:12px ui-monospace,SFMono-Regular,Menlo,monospace;
}

/* ---------- Single post ---------- */

.post{max-width:760px;margin:0 auto}

.post-head{margin-bottom:32px}

.post-head h1{
  font-size:clamp(32px,4.6vw,50px);
  line-height:1.06;
  margin:10px 0 18px;
}

.post-cover{
  margin:0 0 36px;
}

.post-cover img{
  width:100%;
  height:auto;
  border-radius:18px;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}

.prose{
  color:#b6c0cf;
  font-size:17px;
  line-height:1.75;
}

.prose h2,.prose h3,.prose h4{
  color:var(--text);
  letter-spacing:-.02em;
  margin:2.2em 0 .6em;
  line-height:1.2;
}

.prose h2{font-size:28px}
.prose h3{font-size:22px}
.prose h4{font-size:18px}

.prose p{margin:0 0 1.25em}

.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(101,231,255,.3);
  transition:.15s ease;
}

.prose a:hover{border-bottom-color:var(--cyan)}

.prose strong{color:#e7edf5}

.prose ul,.prose ol{
  padding-left:1.4em;
  margin:0 0 1.25em;
}

.prose li{margin-bottom:.45em}

.prose li::marker{color:#5d6878}

.prose blockquote{
  margin:1.6em 0;
  padding:4px 0 4px 20px;
  border-left:2px solid var(--cyan);
  color:#dde6f0;
  font-size:18px;
}

.prose blockquote p:last-child{margin-bottom:0}

.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.88em;
  background:rgba(255,255,255,.07);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  color:#dbe3ee;
}

.prose pre{
  margin:1.6em 0;
  padding:18px 20px;
  border-radius:14px;
  border:1px solid var(--line);
  overflow-x:auto;
  line-height:1.6;
  font-size:13.5px;
}

.prose pre code{
  background:none;
  border:none;
  padding:0;
  font-size:inherit;
  color:inherit;
}

.prose img{
  max-width:100%;
  height:auto;
  border-radius:14px;
  border:1px solid var(--line);
}

.prose hr{
  border:none;
  border-top:1px solid var(--line);
  margin:2.4em 0;
}

.prose table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  margin:1.6em 0;
  font-size:14px;
}

.prose th,.prose td{
  border:1px solid var(--line);
  padding:9px 13px;
  text-align:left;
}

.prose th{
  color:var(--text);
  background:rgba(255,255,255,.04);
  font-weight:700;
}

.post-tags{
  margin-top:40px;
  padding-top:28px;
  border-top:1px solid var(--line);
}

.post-nav{
  margin-top:36px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}

.post-nav-link{
  border:1px solid var(--line);
  background:rgba(255,255,255,.025);
  border-radius:14px;
  padding:15px 18px;
  display:flex;
  flex-direction:column;
  gap:5px;
  transition:.18s ease;
}

.post-nav-link:hover{border-color:rgba(101,231,255,.3)}

.post-nav-link small{
  color:#768397;
  font:11px ui-monospace,SFMono-Regular,Menlo,monospace;
  text-transform:uppercase;
  letter-spacing:.07em;
}

.post-nav-link span{
  font-size:14px;
  font-weight:650;
  color:#dde6f0;
  line-height:1.35;
}

.post-nav-link.next{text-align:right;align-items:flex-end}

/* ---------- Footer ---------- */

.site-footer{
  padding:24px 0 36px;
  border-top:1px solid rgba(255,255,255,.055);
  color:#687486;
  font-size:12px;
  position:relative;
  z-index:1;
}

.footer-row{
  display:flex;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}

.footer-row a{color:#9da8b8}

/* ---------- Responsive ---------- */

@media (max-width: 620px){
  .wrap{width:min(100% - 24px,1080px)}
  body{padding-top:58px}
  .site-header .inner{height:58px}
  .site-nav a{padding:7px 12px;font-size:13px}
  .hero{padding:56px 0}
  .series-grid{grid-template-columns:1fr}
  .latest{flex-direction:column;gap:6px}
  section{padding:52px 0}
  .page{padding:40px 0 56px}
  .card-link.has-cover{grid-template-columns:1fr}
  .card-cover{order:-1}
  .post-nav{grid-template-columns:1fr}
  .post-nav-link.next{text-align:left;align-items:flex-start}
}