:root {
  --bg-base: #0f1115;
  --bg-card: #1a1d24;
  --bg-elevated: #262830;
  --border: #363840;
  --border-subtle: #2a2c34;
  --text-primary: #f0f0f2;
  --text-secondary: #9ca3af;
  --text-tertiary: #9ca3af;
  --accent: #ffff00;
  --accent-muted: rgba(255, 255, 0, 0.12);
  --display: "Orbitron", ui-sans-serif, system-ui, sans-serif;
  --body: "Inter", ui-sans-serif, system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-family: var(--display); letter-spacing: -0.01em; }
p { margin: 0 0 0.9em 0; color: var(--text-secondary); }
.font-display { font-family: var(--display); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 40;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}
.topbar-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
}
.brand-mark {
  font-family: var(--display); font-weight: 900;
  letter-spacing: 0.04em; font-size: 16px;
}
.brand-mark .yellow { color: var(--accent); font-weight: 500; }
.topnav { display: flex; align-items: center; gap: 4px; font-size: 14px; }
.topnav a.link {
  color: var(--text-secondary);
  padding: 8px 12px; border-radius: 6px;
  text-decoration: none;
  transition: background-color 120ms ease, color 120ms ease;
}
.topnav a.link:hover { background: var(--bg-elevated); color: var(--text-primary); }
.topnav span.link.current { padding: 8px 12px; color: var(--accent); }
@media (max-width: 640px) { .topnav a.link { display: none; } .topnav span.link.current { display: none; } }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--display); font-weight: 700; font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 8px 14px; border-radius: 6px;
  transition: transform 120ms, background 120ms, opacity 120ms;
}
.btn.primary { background: var(--accent); color: var(--bg-base); }
.btn.primary:hover { opacity: 0.92; }
.btn.ghost { border: 1px solid var(--border); color: var(--text-primary); }
.btn.ghost:hover { background: var(--bg-elevated); }

/* Page wrapper */
.page { padding: 0; }
section { border-bottom: 1px solid var(--border-subtle); }
.wrap { max-width: 1280px; margin: 0 auto; padding: 56px 20px; }
@media (min-width: 640px) { .wrap { padding: 80px 32px; } }

/* Hero */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 55% at 80% 15%, rgba(255,255,0,0.06), transparent 70%);
}
.hero .wrap { position: relative; padding-top: 80px; padding-bottom: 96px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-muted); color: var(--accent);
  font-family: var(--display); font-weight: 700; font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
}
.chip .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
}
.hero h1 {
  font-size: 40px; font-weight: 900; line-height: 1.05;
  max-width: 760px; margin: 24px 0 18px;
  letter-spacing: -0.02em;
}
.hero h1 .accent { color: var(--accent); }
@media (min-width: 640px) { .hero h1 { font-size: 52px; } }
@media (min-width: 900px) { .hero h1 { font-size: 60px; } }
.hero .sub {
  font-size: 16px; max-width: 640px; margin-bottom: 32px;
  color: var(--text-secondary); line-height: 1.55;
}
@media (min-width: 640px) { .hero .sub { font-size: 18px; } }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.cta-row .btn { padding: 14px 22px; font-size: 13px; }
.trust-bar {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px; max-width: 640px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-subtle);
}
@media (min-width: 640px) { .trust-bar { grid-template-columns: repeat(3, 1fr); } }
.trust-bar dt {
  font-family: var(--display); font-weight: 900;
  font-size: 20px; color: var(--accent); letter-spacing: 0.02em;
}
.trust-bar dd {
  margin: 4px 0 0 0;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-tertiary);
}

/* Section shared */
.eyebrow {
  font-family: var(--display); font-weight: 700; font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
}
.bighead {
  font-family: var(--display); font-weight: 900;
  font-size: 28px; line-height: 1.15; letter-spacing: -0.01em;
  margin: 12px 0 0; max-width: 760px;
}
@media (min-width: 640px) { .bighead { font-size: 34px; } }
.lead {
  color: var(--text-secondary); font-size: 16px;
  margin: 24px 0 0; max-width: 640px;
}
@media (min-width: 640px) { .lead { font-size: 18px; } }

/* How it works */
.steps {
  display: grid; gap: 20px;
  grid-template-columns: 1fr; margin-top: 48px;
}
@media (min-width: 768px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 24px;
}
.step .label {
  font-family: var(--display); font-weight: 700; font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
}
.step h3 {
  font-family: var(--display); font-weight: 700;
  font-size: 20px; margin: 12px 0 12px;
}
.step p { color: var(--text-secondary); font-size: 14px; margin: 0; }

/* Why */
.why-section { background: rgba(26, 29, 36, 0.5); }
.why-grid {
  display: grid; gap: 48px; grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .why-grid { grid-template-columns: 1fr 1fr; gap: 64px; }
}
.pull {
  border: 1px solid var(--border); background: var(--bg-base);
  border-radius: 12px; padding: 20px; margin-bottom: 16px;
}
.pull p {
  color: var(--text-primary); font-size: 15px; margin: 0;
}
@media (min-width: 640px) { .pull p { font-size: 16px; } }
.pull .tag {
  font-family: var(--display); font-weight: 700; font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-tertiary); margin-top: 12px; display: block;
}

/* Library (D5-C: 3 big domains) */
.domain-grid {
  display: grid; gap: 20px; grid-template-columns: 1fr;
  margin-top: 48px;
}
@media (min-width: 640px) { .domain-grid { grid-template-columns: repeat(3, 1fr); } }
.domain {
  display: flex; flex-direction: column; text-align: center;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px 24px;
}
.domain .d-name {
  font-family: var(--display); font-weight: 700; font-size: 13px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-secondary); margin: 0;
}
.domain .d-n {
  font-family: var(--display); font-weight: 900;
  font-size: 56px; line-height: 1; letter-spacing: -0.01em;
  color: var(--accent); margin: 16px 0 0;
}
.domain .d-label {
  font-family: var(--display); font-weight: 700; font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-tertiary); margin: 8px 0 0;
}
.domain .d-tail {
  margin-top: 20px; padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-tertiary); font-size: 12px; line-height: 1.65;
}
.domain-tail {
  margin-top: 40px; color: var(--text-secondary);
  font-size: 14px; max-width: 760px;
}
.domain-tail strong { color: var(--text-primary); }
.proprietary-note {
  margin-top: 24px; color: var(--text-tertiary);
  font-size: 14px; max-width: 760px;
}

/* Final CTA */
.final { text-align: center; }
.final h2 {
  font-family: var(--display); font-weight: 900;
  font-size: 32px; line-height: 1.1; margin: 0 auto;
  max-width: 720px; letter-spacing: -0.01em;
}
@media (min-width: 640px) { .final h2 { font-size: 44px; } }
.final p {
  margin: 24px auto 0; max-width: 640px;
  color: var(--text-secondary);
}
.final .cta-wrap { margin-top: 32px; display: flex; justify-content: center; }
.final .btn { padding: 16px 28px; font-size: 13px; }

/* Footer */
footer.foot { max-width: 1152px; margin: 0 auto; padding: 40px 20px; }
.foot-inner {
  display: flex; flex-direction: column; gap: 16px;
  align-items: flex-start; justify-content: space-between;
  padding-top: 32px; border-top: 1px solid var(--border-subtle);
  font-size: 12px; color: var(--text-tertiary);
}
@media (min-width: 640px) {
  .foot-inner { flex-direction: row; align-items: center; }
}
.foot-left { display: flex; align-items: center; gap: 16px; }
.foot-links { display: flex; gap: 20px; }
.foot-links a:hover { color: var(--text-primary); }.logo-img { height: 48px; width: auto; display: block; }
.logo-img-sm { height: 48px; width: auto; display: block; }
.mt-24 { margin-top: 24px; }

.section-cta {
  margin-top: 40px;
}
.section-cta .link {
  font-family: var(--display); font-weight: 700;
  font-size: 12px; letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--accent); text-decoration: none;
}
.section-cta .link:hover { text-decoration: underline; }