:root {
  --bg: #0a0c10;
  --bg-elev: #0d1117;
  --panel: #0f141c;
  --line: #1a2230;
  --line-bright: #25344a;
  --text: #e7edf4;
  --muted: #8b98aa;
  --faint: #5a6675;
  --accent: #4fd6c9;
  --accent-dim: #2a6b66;
  --danger: #f0883e;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --maxw: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* faint technical grid */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.16;
  mask-image: radial-gradient(circle at 50% 0%, black, transparent 78%);
}

main, .nav, .footer { position: relative; z-index: 1; }

/* nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 28px;
  position: sticky;
  top: 0;
  background: rgba(10, 12, 16, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
}
.mark {
  width: 11px; height: 11px;
  border: 1.5px solid var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(79, 214, 201, 0.5);
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.18s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  font-family: var(--mono);
  font-size: 13px !important;
  color: var(--accent) !important;
  border: 1px solid var(--line-bright);
  padding: 7px 14px;
  border-radius: 6px;
}
.nav-cta:hover { border-color: var(--accent-dim); background: rgba(79,214,201,0.06); }

/* shared section rhythm */
.band {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 92px 28px;
  border-bottom: 1px solid var(--line);
}
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 28px;
}
h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
.prose p { color: var(--muted); margin-bottom: 18px; max-width: 60ch; }
.prose p strong, .prose em { color: var(--text); font-style: normal; }
.prose em { color: var(--accent); }

/* hero */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 28px 104px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 40px;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 22px;
}
h1 {
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin-bottom: 26px;
}
h1 .accent { color: var(--accent); }
.lede { color: var(--muted); font-size: clamp(16px, 1.7vw, 19px); max-width: 54ch; margin-bottom: 34px; }
.lede strong { color: var(--text); }
.hero-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 13px 24px;
  border-radius: 8px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn-primary { background: var(--accent); color: #04201d; box-shadow: 0 0 0 rgba(79,214,201,0); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 28px rgba(79,214,201,0.22); }
.badge {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--line-bright);
  border-radius: 6px;
  padding: 7px 11px;
}

/* hero visual */
.hero-visual { display: flex; justify-content: center; }
.topology { width: 100%; max-width: 340px; }
.topology .n-core { animation: pulse 3.4s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { stroke-opacity: 1; r: 7; }
  50% { stroke-opacity: 0.55; r: 8.5; }
}

/* two-col layout */
.two-col { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 48px; align-items: start; }

.principles { list-style: none; margin-top: 26px; }
.principles li {
  color: var(--muted);
  padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}
.principles .k {
  display: inline-block;
  font-family: var(--mono);
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.04em;
  margin-right: 12px;
  min-width: 108px;
}

/* panels */
.panel { background: linear-gradient(180deg, var(--panel), var(--bg)); }

/* product blocks */
.product-head { margin-bottom: 26px; }
.product-head h2 { font-family: var(--mono); letter-spacing: 0.02em; }
.product-sub { color: var(--faint); font-family: var(--mono); font-size: 14px; margin-top: 8px; }
.callout {
  color: var(--text) !important;
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 18px;
  font-size: 17px;
}
.fineprint { font-size: 14px; color: var(--faint) !important; }
.fineprint code { font-family: var(--mono); color: var(--muted); }

.verdicts { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0; }
.verdict {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--line-bright);
}
.v-diverge { color: var(--danger); border-color: #5a3a24; background: rgba(240,136,62,0.06); }
.v-null { color: var(--accent); border-color: var(--accent-dim); background: rgba(79,214,201,0.05); }
.v-insuf { color: var(--muted); }

/* team */
.team { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.member {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
}
.member h3 { font-size: 20px; font-weight: 600; }
.member .role { font-family: var(--mono); font-size: 13px; color: var(--accent); margin: 6px 0 14px; }
.member p { color: var(--muted); font-size: 15px; }

/* contact */
.contact { text-align: center; padding: 110px 28px; }
.contact h2 { margin-bottom: 28px; }
.mail {
  font-family: var(--mono);
  font-size: clamp(20px, 3.6vw, 34px);
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 4px;
  transition: border-color 0.2s ease;
}
.mail:hover { border-color: var(--accent); }

/* footer */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 30px 28px 56px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--faint);
  font-size: 13px;
  font-family: var(--mono);
}
.footer .sep { color: var(--line-bright); }

/* responsive */
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 64px; }
  .hero-visual { order: -1; max-width: 240px; margin: 0 auto; }
  .two-col { grid-template-columns: 1fr; gap: 26px; }
  .team { grid-template-columns: 1fr; }
  .nav-links { gap: 18px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .band { padding: 64px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
}