:root{
  --bg:#06090A;
  --surface:#0D1613;
  --edge:#17281F;
  --line:#2F6B4C;
  --line-soft:#1B3A28;
  --signal:#3FE08A;
  --ink:#E6F3EC;
  --muted:#7E9C8C;
  --max:1120px;
}

*{box-sizing:border-box;}
html{ color-scheme:dark; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{
  font-family:"JetBrains Mono", ui-monospace, monospace;
  font-weight:600;
  text-wrap:balance;
  margin:0;
  letter-spacing:-0.01em;
}
a{ color:inherit; }
.mono{ font-family:"JetBrains Mono", ui-monospace, monospace; }
.label{
  font-family:"JetBrains Mono", ui-monospace, monospace;
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--signal);
}
.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
}
@media (max-width:640px){ .wrap{ padding:0 20px; } }

/* ---------- registration-mark ruled section ---------- */
.plate{
  position:relative;
  border-top:1px solid var(--edge);
  padding:76px 0 84px;
}
.plate::before{
  content:"";
  position:absolute;
  top:-1px;
  left:28px;
  width:9px;
  height:9px;
  border-top:1px solid var(--line);
  border-left:1px solid var(--line);
}
@media (max-width:640px){ .plate{ padding:56px 0 60px; } }

.fig-head{
  display:flex;
  align-items:baseline;
  gap:18px;
  margin-bottom:44px;
  flex-wrap:wrap;
}
.fig-head h2{ font-size:1.5rem; color:var(--ink); }
.fig-head .label{ white-space:nowrap; }
.rule{
  flex:1;
  min-width:40px;
  height:1px;
  background:var(--line-soft);
  transform:translateY(-4px);
}

/* ---------- nav ---------- */
header.top{
  position:sticky;
  top:0;
  z-index:5;
  background:rgba(6,9,10,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--edge);
}
nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 0;
}
.wordmark{
  font-family:"JetBrains Mono", monospace;
  font-weight:700;
  font-size:1.05rem;
  letter-spacing:0.01em;
}
.wordmark sup{
  font-weight:500;
  font-size:0.6rem;
  color:var(--signal);
  top:-0.9em;
  margin-left:2px;
}
.navlinks{
  display:flex;
  gap:28px;
  font-size:0.86rem;
  font-family:"JetBrains Mono", monospace;
}
.navlinks a{ text-decoration:none; color:var(--muted); }
.navlinks a:hover, .navlinks a:focus-visible{ color:var(--signal); }
@media (max-width:640px){ .navlinks{ display:none; } }

/* ---------- hero ---------- */
.hero{ padding:72px 0 56px; }
.hero-grid{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:56px;
  align-items:center;
}
@media (max-width:860px){ .hero-grid{ grid-template-columns:1fr; } }
.hero h1{
  font-size:clamp(1.9rem, 4vw, 2.85rem);
  line-height:1.2;
}
.hero h1 em{
  font-style:normal;
  color:var(--signal);
}
.hero p.lede{
  margin:22px 0 0;
  max-width:52ch;
  color:var(--muted);
  font-size:1.05rem;
}
.cursor{
  display:inline-block;
  width:0.55ch;
  background:var(--signal);
  margin-left:2px;
  animation:blink 1s steps(1) infinite;
}
@media (prefers-reduced-motion:reduce){ .cursor{ animation:none; } }
@keyframes blink{ 50%{ opacity:0; } }

.cta-row{ display:flex; gap:14px; margin-top:32px; flex-wrap:wrap; }
.btn{
  font-family:"JetBrains Mono", monospace;
  font-size:0.8rem;
  letter-spacing:0.03em;
  text-decoration:none;
  padding:12px 20px;
  border:1px solid var(--line);
  color:var(--ink);
  display:inline-block;
  transition:background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn.primary{ background:var(--signal); color:#04120A; border-color:var(--signal); font-weight:600; }
.btn.primary:hover{ background:#5CF0A2; border-color:#5CF0A2; }
.btn:not(.primary):hover{ border-color:var(--signal); color:var(--signal); }

/* ---------- diagram ---------- */
.diagram-box{
  border:1px solid var(--edge);
  background:
    repeating-linear-gradient(0deg, rgba(63,224,138,0.025) 0px, rgba(63,224,138,0.025) 1px, transparent 1px, transparent 3px),
    var(--surface);
  padding:22px 18px 18px;
}
.diagram-box .label{ display:block; margin-bottom:12px; }
svg text{
  font-family:"JetBrains Mono", monospace;
  font-size:9px;
  letter-spacing:0.06em;
  fill:var(--muted);
}

/* ---------- about ---------- */
.about-grid{ display:grid; grid-template-columns:1.4fr 1fr; gap:48px; }
@media (max-width:860px){ .about-grid{ grid-template-columns:1fr; } }
.about-grid p{ margin:0 0 16px; max-width:60ch; color:var(--ink); }
.patent-strip{ border:1px solid var(--edge); background:var(--surface); padding:18px 20px; align-self:start; }
.patent-strip .label{ display:block; margin-bottom:10px; }
.patent-strip ul{ margin:0; padding-left:0; list-style:none; }
.patent-strip li{
  font-size:0.88rem;
  padding:8px 0;
  border-top:1px solid var(--edge);
  color:var(--muted);
}
.patent-strip li:first-child{ border-top:none; padding-top:0; }
.patent-strip strong{ color:var(--ink); font-weight:500; }

/* ---------- capabilities ledger ---------- */
.ledger{ display:grid; grid-template-columns:1fr 1fr; gap:0 48px; }
@media (max-width:640px){ .ledger{ grid-template-columns:1fr; gap:36px; } }
.ledger-col .label{ display:block; margin-bottom:14px; }
.ledger-col ul{ margin:0; padding:0; list-style:none; }
.ledger-col li{
  display:flex;
  gap:12px;
  padding:13px 0;
  border-top:1px solid var(--edge);
  font-size:0.95rem;
}
.ledger-col li:first-child{ border-top:1px solid var(--line-soft); }
.ledger-col li::before{ content:"›"; color:var(--signal); flex-shrink:0; font-family:"JetBrains Mono", monospace; }

/* ---------- credentials ---------- */
.cred-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--edge);
  border:1px solid var(--edge);
}
@media (max-width:860px){ .cred-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:560px){ .cred-grid{ grid-template-columns:1fr; } }
.cred{
  background:var(--surface);
  padding:20px 18px;
  min-height:132px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
}
.cred .issuer{
  font-family:"JetBrains Mono", monospace;
  font-size:0.68rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--muted);
}
.cred .title{
  font-family:"IBM Plex Sans", sans-serif;
  font-weight:500;
  font-size:1rem;
  margin-top:10px;
  line-height:1.3;
  color:var(--ink);
}
.cred .year{
  font-family:"JetBrains Mono", monospace;
  font-size:0.72rem;
  color:var(--signal);
  margin-top:14px;
}

/* ---------- work / projects ---------- */
.work-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:var(--edge);
  border:1px solid var(--edge);
}
@media (max-width:760px){ .work-grid{ grid-template-columns:1fr; } }
.work-card{
  background:var(--surface);
  padding:28px 26px 26px;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.work-card .idx{
  font-family:"JetBrains Mono", monospace;
  font-size:0.72rem;
  color:var(--signal);
  letter-spacing:0.08em;
}
.work-card h3{ font-size:1.2rem; font-family:"IBM Plex Sans", sans-serif; font-weight:600; color:var(--ink); }
.work-card p{ margin:0; color:var(--muted); max-width:46ch; }
.tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:auto; padding-top:10px; }
.tag{
  font-family:"JetBrains Mono", monospace;
  font-size:0.68rem;
  letter-spacing:0.03em;
  color:var(--muted);
  border:1px solid var(--edge);
  padding:4px 8px;
}

/* ---------- process ---------- */
.process{ display:flex; gap:0; }
@media (max-width:760px){ .process{ flex-direction:column; } }
.step{ flex:1; position:relative; padding:0 20px 0 0; }
.step:not(:last-child)::after{
  content:"";
  position:absolute;
  top:9px;
  right:0;
  width:20px;
  height:1px;
  background:var(--line-soft);
}
@media (max-width:760px){
  .step{ padding:0 0 26px 22px; border-left:1px solid var(--edge); }
  .step:not(:last-child)::after{ display:none; }
}
.step .n{ font-family:"JetBrains Mono", monospace; font-size:0.72rem; color:var(--signal); }
.step h4{
  font-family:"IBM Plex Sans", sans-serif;
  font-weight:600;
  font-size:1rem;
  margin:8px 0 6px;
  color:var(--ink);
}
.step p{ margin:0; font-size:0.86rem; color:var(--muted); }

/* ---------- contact / footer ---------- */
footer.sig{ border-top:1px solid var(--edge); padding:60px 0 46px; }
.sig-grid{ display:grid; grid-template-columns:1.2fr 1fr; gap:40px; align-items:end; }
@media (max-width:760px){ .sig-grid{ grid-template-columns:1fr; } }
footer.sig h2{ font-size:1.6rem; max-width:20ch; color:var(--ink); }
.sig-links{ display:flex; flex-direction:column; gap:10px; margin-top:22px; }
.sig-links a{
  text-decoration:none;
  font-size:0.95rem;
  font-family:"JetBrains Mono", monospace;
  border-bottom:1px solid var(--line-soft);
  width:max-content;
  padding-bottom:2px;
}
.sig-links a:hover{ border-color:var(--signal); color:var(--signal); }
.colophon{
  font-family:"JetBrains Mono", monospace;
  font-size:0.74rem;
  color:var(--muted);
  line-height:1.8;
  text-align:right;
}
@media (max-width:760px){ .colophon{ text-align:left; } }