.nav {
  position: sticky; top: 0; z-index: 200; display: flex; align-items: center; justify-content: space-between;
  padding: 18px 6vw; background: rgba(9, 13, 22, .75); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-soft);
}
.nav .brand { display: flex; align-items: center; gap: 10px; }
.nav .brand .mark { width: 32px; height: 32px; border-radius: 9px; background: linear-gradient(135deg, var(--accent), #ff8154); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; color: #1a0904; }
.nav .brand span { font-family: var(--font-display); font-weight: 700; font-size: 18px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { color: var(--text-dim); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.nav-cta { display: flex; gap: 10px; align-items: center; }
@media (max-width: 760px) { .nav-links { display: none; } }
@media (max-width: 480px) {
  .nav { padding: 14px 5vw; }
  .nav-cta { gap: 6px; }
  .nav-cta .btn { padding: 9px 12px; font-size: 12.5px; }
  .nav .brand span { display: none; }
}

.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; padding: 8vw 6vw 6vw; max-width: 1400px; margin: 0 auto; }
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; padding-top: 40px; } }
.eyebrow-pill { display: inline-flex; align-items: center; gap: 8px; background: var(--surface-2); border: 1px solid var(--border); padding: 7px 14px 7px 8px; border-radius: 100px; font-size: 12.5px; color: var(--text-dim); margin-bottom: 22px; }
.eyebrow-pill .pulse-dot { background: var(--money); }
.hero h1 { font-size: clamp(34px, 4.6vw, 54px); line-height: 1.08; margin: 0 0 20px; max-width: 640px; }
.hero .lead { font-size: 17px; color: var(--text-dim); max-width: 520px; line-height: 1.65; margin-bottom: 32px; }
.hero-ctas { display: flex; gap: 12px; margin-bottom: 30px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 26px; flex-wrap: wrap; }
.hero-meta .m-val { font-family: var(--font-display); font-weight: 700; font-size: 20px; }
.hero-meta .m-lbl { font-size: 12px; color: var(--text-faint); }

.qr-hero { position: relative; display: flex; align-items: center; justify-content: center; }
.qr-hero canvas { width: 100%; max-width: 380px; aspect-ratio: 1; }
.qr-hero .glow { position: absolute; inset: -60px; background: radial-gradient(circle, var(--accent-dim), transparent 65%); filter: blur(30px); z-index: -1; }
.qr-hero .float-card {
  position: absolute; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 10px 14px;
  font-size: 12.5px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 8px; opacity: 0; transform: translateY(8px);
  transition: opacity .6s ease, transform .6s ease;
}
.qr-hero .float-card.show { opacity: 1; transform: translateY(0); }
.qr-hero .fc-paid { bottom: 6%; left: -8%; }
.qr-hero .fc-instant { top: 4%; right: -10%; }

section.section { padding: 90px 6vw; max-width: 1400px; margin: 0 auto; }
.section-head { max-width: 620px; margin-bottom: 50px; }
.section-head h2 { font-size: clamp(26px, 3vw, 36px); margin: 0 0 14px; }
.section-head p { color: var(--text-dim); font-size: 15.5px; line-height: 1.6; margin: 0; }

/* flow diagram */
.flow-wrap { position: relative; }
.flow-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; position: relative; z-index: 2; }
@media (max-width: 980px) { .flow-steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .flow-steps { grid-template-columns: 1fr; } }
.flow-step { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 20px 18px; }
.flow-step .fnum { font-family: var(--font-display); font-weight: 800; font-size: 13px; color: var(--accent-2); margin-bottom: 10px; }
.flow-step h4 { margin: 0 0 8px; font-size: 14.5px; }
.flow-step p { margin: 0; font-size: 12.5px; color: var(--text-dim); line-height: 1.55; }
.flow-line { position: absolute; top: 46px; left: 5%; right: 5%; height: 2px; z-index: 1; }
.flow-line svg { width: 100%; height: 100%; overflow: visible; }
@media (max-width: 980px) { .flow-line { display: none; } }

/* architecture diagram */
.arch { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 40px; }
.arch-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 14px; }
@media (max-width: 760px) { .arch-grid { grid-template-columns: 1fr; } }
.arch-node { background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-align: center; }
.arch-node .an-label { font-weight: 700; font-size: 13.5px; margin-bottom: 4px; }
.arch-node .an-sub { font-size: 11.5px; color: var(--text-faint); }
.arch-node.core { border-color: var(--accent); background: var(--accent-dim); }
.arch-arrow { text-align: center; color: var(--text-faint); font-size: 20px; }

.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 900px) { .feat-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .feat-grid { grid-template-columns: 1fr; } }
.feat-card { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 24px; }
.feat-card .fi { width: 40px; height: 40px; border-radius: 11px; background: var(--surface-2); display: flex; align-items: center; justify-content: center; font-size: 18px; margin-bottom: 16px; }
.feat-card h4 { margin: 0 0 8px; font-size: 15px; }
.feat-card p { margin: 0; font-size: 13px; color: var(--text-dim); line-height: 1.6; }

.cta-band { background: linear-gradient(135deg, #1a1030, #2a1210); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 56px 6vw; text-align: center; margin: 0 6vw 90px; }
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); margin: 0 0 14px; }
.cta-band p { color: var(--text-dim); margin: 0 0 26px; }

footer.site-footer { border-top: 1px solid var(--border-soft); padding: 34px 6vw; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px; color: var(--text-faint); font-size: 12.5px; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }