/* ===== PayNXT landing page ===== */
*, *::before, *::after { box-sizing: border-box; }
:root {
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --primary: #4f46e5;
  --primary-d: #4338ca;
  --violet: #7c3aed;
  --green: #10b981;
  --radius: 16px;
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
}
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: all .15s ease; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-d); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-light { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.25); }
.btn-light:hover { background: rgba(255,255,255,.2); }
.btn-white { background: #fff; color: var(--primary-d); }
.btn-white:hover { transform: translateY(-1px); }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.brand .dot { width: 26px; height: 26px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--violet)); display: inline-block; }
.brand b { color: var(--primary); }
.nav-links { display: flex; gap: 26px; margin-left: 18px; }
.nav-links a { color: var(--muted); font-weight: 500; font-size: 15px; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: auto; display: flex; gap: 10px; align-items: center; }

/* Hero */
.hero {
  background: radial-gradient(1200px 500px at 70% -10%, rgba(124,58,237,.35), transparent 60%),
              linear-gradient(160deg, #1e1b4b 0%, #312e81 55%, #4338ca 100%);
  color: #fff; overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding: 84px 0 92px; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: #c7d2fe; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { font-size: 52px; line-height: 1.08; letter-spacing: -.03em; margin: 0 0 18px; font-weight: 800; }
.hero p.lead { font-size: 19px; color: #dbe1f5; max-width: 560px; margin: 0 0 28px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.hero-note { font-size: 14px; color: #b4bce6; }
.hero-note .live { color: #6ee7b7; font-weight: 600; }

/* Hero mock card */
.mock {
  background: #fff; color: var(--ink); border-radius: 18px; padding: 22px;
  box-shadow: 0 30px 70px rgba(2,6,23,.45); transform: rotate(1.5deg);
}
.mock .mhead { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.mock .mtitle { font-weight: 700; }
.mock .badge { font-size: 12px; font-weight: 600; color: var(--green); background: #ecfdf5; border: 1px solid #a7f3d0; padding: 3px 10px; border-radius: 999px; }
.mock .row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.mock .row span:last-child { font-weight: 600; }
.mock .pay { margin-top: 16px; width: 100%; text-align: center; background: var(--primary); color: #fff; padding: 12px; border-radius: 10px; font-weight: 600; }
.mock .gw { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.mock .gw span { font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; }

/* Stats strip */
.stats { border-bottom: 1px solid var(--line); background: var(--bg-alt); }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; padding: 36px 0; text-align: center; }
.stat .num { font-size: 30px; font-weight: 800; color: var(--primary); letter-spacing: -.02em; }
.stat .lbl { font-size: 14px; color: var(--muted); }

/* Sections */
section.block { padding: 80px 0; }
section.alt { background: var(--bg-alt); }
.sec-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.sec-head .kicker { color: var(--primary); font-weight: 700; font-size: 14px; letter-spacing: .06em; text-transform: uppercase; }
.sec-head h2 { font-size: 38px; line-height: 1.15; letter-spacing: -.02em; margin: 8px 0 12px; }
.sec-head p { font-size: 18px; color: var(--muted); margin: 0; }

/* 3-col value */
.cols3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.vcard { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.vcard .ic { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: #eef2ff; color: var(--primary); margin-bottom: 16px; }
.vcard h3 { margin: 0 0 8px; font-size: 19px; }
.vcard p { margin: 0; color: var(--muted); font-size: 15px; }

/* Feature grid */
.fgrid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.fitem { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: box-shadow .15s, transform .15s; }
.fitem:hover { box-shadow: 0 14px 30px rgba(15,23,42,.07); transform: translateY(-2px); }
.fitem .ic { color: var(--primary); margin-bottom: 12px; }
.fitem h3 { margin: 0 0 6px; font-size: 17px; }
.fitem p { margin: 0; color: var(--muted); font-size: 14px; }

/* Gateways */
.gwgrid { display: grid; grid-template-columns: repeat(5,1fr); gap: 16px; }
.gwcard { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 24px 18px; text-align: center; }
.gwcard .gname { font-weight: 700; font-size: 17px; }
.gwcard .gstat { margin-top: 10px; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; display: inline-block; }
.gstat.live { color: var(--green); background: #ecfdf5; border: 1px solid #a7f3d0; }
.gstat.soon { color: var(--muted); background: #f1f5f9; border: 1px solid var(--line); }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; position: relative; }
.step .n { width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg,var(--primary),var(--violet)); color: #fff; display: grid; place-items: center; font-weight: 700; margin-bottom: 14px; }
.step h3 { margin: 0 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* CTA band */
.ctaband { background: linear-gradient(135deg, var(--primary), var(--violet)); color: #fff; border-radius: 24px; padding: 56px; text-align: center; }
.ctaband h2 { font-size: 34px; margin: 0 0 10px; letter-spacing: -.02em; }
.ctaband p { font-size: 18px; color: #e9e9ff; margin: 0 0 24px; }
.ctaband .hero-cta { justify-content: center; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; margin-bottom: 12px; background: #fff; }
.faq summary { cursor: pointer; font-weight: 600; padding: 16px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--primary); font-weight: 400; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 0 0 18px; color: var(--muted); }

/* Footer */
.footer { background: #0f172a; color: #cbd5e1; padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 32px; border-bottom: 1px solid #1e293b; }
.footer .brand { color: #fff; margin-bottom: 12px; }
.footer .brand b { color: #a5b4fc; }
.footer .tag { color: #94a3b8; font-size: 14px; max-width: 280px; }
.footer h4 { color: #fff; font-size: 14px; text-transform: uppercase; letter-spacing: .05em; margin: 0 0 14px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 10px; }
.footer a { color: #cbd5e1; font-size: 15px; }
.footer a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 22px; font-size: 14px; color: #94a3b8; flex-wrap: wrap; gap: 8px; }

/* ===== Docs ===== */
.docs { display: grid; grid-template-columns: 240px 1fr; gap: 40px; max-width: var(--maxw); margin: 0 auto; padding: 40px 24px 80px; }
.docs-side { position: sticky; top: 84px; align-self: start; }
.docs-side h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 16px 0 8px; }
.docs-side a { display: block; color: #475569; font-size: 14px; padding: 5px 0; }
.docs-side a:hover { color: var(--primary); }
.docs-body { min-width: 0; }
.docs-body h1 { font-size: 34px; letter-spacing: -.02em; margin: 0 0 8px; }
.docs-body h2 { font-size: 24px; margin: 40px 0 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.docs-body h3 { font-size: 17px; margin: 24px 0 8px; }
.docs-body p, .docs-body li { color: #334155; font-size: 15px; }
.docs-body code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 13px; color: #be123c; }
.docs-body pre { background: #0f172a; color: #e2e8f0; padding: 16px 18px; border-radius: 10px; overflow-x: auto; font-size: 13px; line-height: 1.5; }
.docs-body pre code { background: transparent; color: inherit; padding: 0; }
.docs-body table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 12px 0; }
.docs-body th, .docs-body td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.docs-body th { color: #64748b; font-size: 12px; text-transform: uppercase; }
.pill-env { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px; }
.pill-env.test { background: #fffbeb; color: #b45309; }
.pill-env.live { background: #ecfdf5; color: #15803d; }
@media (max-width: 820px) {
  .docs { grid-template-columns: 1fr; }
  .docs-side { position: static; display: flex; flex-wrap: wrap; gap: 8px 16px; }
  .docs-side h4 { width: 100%; }
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; padding: 56px 0; }
  .hero h1 { font-size: 38px; }
  .mock { transform: none; }
  .stats-grid { grid-template-columns: repeat(2,1fr); gap: 28px; }
  .cols3, .fgrid, .steps { grid-template-columns: 1fr; }
  .gwgrid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .sec-head h2 { font-size: 30px; }
  .ctaband { padding: 40px 24px; }
}
@media (max-width: 520px) {
  .nav-cta .btn-ghost { display: none; }
  .gwgrid { grid-template-columns: 1fr; }
}