/* PayVan landing — single dark theme, no framework. */

:root{
  --bg:#070B12;
  --bg-alt:#0A101A;
  --surface:#0E1622;
  --surface-2:#121C2A;
  --line:#1E2A3A;
  --line-2:#2A3A4E;
  --ink:#E9EEF6;
  --ink-2:#B7C3D2;
  --muted:#7E8CA0;
  --violet:#7A5CFF;
  --blue:#3E7BFF;
  --mint:#17D3A7;
  --grad:linear-gradient(120deg,#7A5CFF 0%,#3E7BFF 55%,#17D3A7 100%);
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --disp:"Space Grotesk","Inter",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --wrap:1180px;
  --r:16px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:16.5px;line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,svg{max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--disp);letter-spacing:-.025em;line-height:1.1;margin:0}
p{margin:0 0 1em}
.mono{font-family:var(--mono);font-size:.86em;color:var(--ink-2)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:100;background:var(--surface);padding:10px 16px;border-radius:10px;border:1px solid var(--line-2)}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px}

/* ── ambient background ─────────────────────────────────────────────────── */
.aurora{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(720px 480px at 12% -6%, rgba(122,92,255,.28), transparent 65%),
    radial-gradient(680px 520px at 92% 6%, rgba(62,123,255,.20), transparent 62%),
    radial-gradient(900px 600px at 70% 92%, rgba(23,211,167,.14), transparent 65%);
}
.aurora::after{
  content:"";position:absolute;inset:0;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(720px 520px at 50% 0%,#000,transparent 78%);
          mask-image:radial-gradient(720px 520px at 50% 0%,#000,transparent 78%);
}

/* ── header ─────────────────────────────────────────────────────────────── */
.site-head{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(7,11,18,.72);border-bottom:1px solid rgba(255,255,255,.06)}
.head-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--disp)}
.brand-mark{width:32px;height:32px;flex:none;border-radius:9px}
.brand-word{font-size:21px;font-weight:700;letter-spacing:-.03em}
.brand-word span{color:var(--muted);font-weight:500}
.head-nav{display:flex;gap:26px;margin-left:auto;font-size:15px;color:var(--ink-2)}
.head-nav a{transition:color .18s}
.head-nav a:hover{color:var(--ink)}
.head-cta{display:flex}

.btn{display:inline-flex;align-items:center;gap:8px;border-radius:12px;
  padding:11px 20px;font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .16s, box-shadow .18s, background .18s, border-color .18s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#05080D;box-shadow:0 10px 30px -12px rgba(62,123,255,.85)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 38px -14px rgba(62,123,255,.95)}
.btn-ghost{border-color:var(--line-2);color:var(--ink);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:#3D5570;background:rgba(255,255,255,.05)}

.burger{display:none;width:42px;height:38px;border-radius:11px;border:1px solid var(--line-2);
  background:transparent;cursor:pointer;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.burger span{display:block;width:16px;height:1.5px;background:var(--ink);transition:transform .2s,opacity .2s}
.burger[aria-expanded="true"] span:first-child{transform:translateY(3.2px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-3.2px) rotate(-45deg)}

/* ── hero ───────────────────────────────────────────────────────────────── */
.hero{padding:92px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-2);
  border:1px solid var(--line-2);background:rgba(255,255,255,.03);
  padding:6px 14px 6px 11px;border-radius:999px;margin:0 0 26px}
.badge .dot{width:7px;height:7px;border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 4px rgba(23,211,167,.18);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{box-shadow:0 0 0 8px rgba(23,211,167,0)}}

h1{font-size:clamp(40px,5.4vw,66px);font-weight:700}
h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin:24px 0 0;font-size:18.5px;color:var(--ink-2);max-width:60ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:34px 0 0}
.hero-stats{display:flex;gap:34px;list-style:none;padding:0;margin:46px 0 0;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column;max-width:170px}
.hero-stats b{font-family:var(--disp);font-size:30px;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.45}

.panel{background:linear-gradient(180deg,var(--surface) 0%,var(--bg-alt) 100%);
  border:1px solid var(--line);border-radius:20px;box-shadow:0 40px 80px -50px rgba(0,0,0,.9)}
.hero-visual{position:relative}
.flow{padding:20px 22px 18px}
.panel-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding-bottom:16px;border-bottom:1px solid var(--line)}
.pill{font-family:var(--mono);font-size:12.5px;padding:5px 11px;border-radius:8px;
  border:1px solid var(--line-2);color:var(--ink-2);background:rgba(255,255,255,.02)}
.pill-ok{color:var(--mint);border-color:rgba(23,211,167,.35);background:rgba(23,211,167,.08)}
.steps{list-style:none;margin:0;padding:14px 0 6px;display:flex;flex-direction:column;gap:2px}
.steps li{display:grid;grid-template-columns:26px 1fr;grid-template-rows:auto auto;
  column-gap:12px;padding:11px 0;position:relative}
.steps li i{grid-row:1 / span 2;width:11px;height:11px;border-radius:50%;margin-top:6px;
  border:2px solid var(--line-2);background:var(--bg)}
.steps li::before{content:"";position:absolute;left:5px;top:24px;bottom:-4px;width:1px;background:var(--line)}
.steps li:last-child::before{display:none}
.steps li b{font-size:15px;font-weight:600}
.steps li span{font-size:13.5px;color:var(--muted)}
.steps .done i{border-color:var(--mint);background:var(--mint)}
.steps .live i{border-color:var(--blue);background:var(--blue);box-shadow:0 0 0 5px rgba(62,123,255,.18);
  animation:pulse2 1.8s ease-in-out infinite}
@keyframes pulse2{50%{box-shadow:0 0 0 10px rgba(62,123,255,0)}}
.steps .next b,.steps .next span{opacity:.55}
.flow-foot{display:flex;justify-content:space-between;gap:12px;padding-top:14px;
  border-top:1px solid var(--line);font-size:12px}
.flow-foot .mono{color:var(--muted)}

.card-preview{position:absolute;right:-8px;bottom:-46px;width:250px;padding:16px 18px;
  background:linear-gradient(140deg,rgba(122,92,255,.22),rgba(23,211,167,.14)),var(--surface-2);
  border-color:var(--line-2);backdrop-filter:blur(6px)}
.cp-row{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}
.cp-label{font-size:12.5px;color:var(--muted)}
.cp-value{font-family:var(--disp);font-size:17px;font-weight:600}
.cp-bar{height:5px;border-radius:99px;background:rgba(255,255,255,.09);overflow:hidden;margin-top:12px}
.cp-bar i{display:block;height:100%;width:72%;border-radius:99px;background:var(--grad)}

/* ── strip ──────────────────────────────────────────────────────────────── */
.strip{border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05);
  background:rgba(255,255,255,.015);margin-top:56px}
.strip-inner{display:flex;flex-wrap:wrap;gap:10px 28px;padding-top:20px;padding-bottom:20px;
  font-size:13.5px;color:var(--muted);justify-content:center}
.strip-inner span{position:relative}
.strip-inner span::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;
  background:var(--line-2);margin-right:10px;vertical-align:middle}

/* ── sections ───────────────────────────────────────────────────────────── */
.section{padding:104px 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,.022) 12%,rgba(255,255,255,.022) 88%,transparent);
  border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mint);margin:0 0 14px}
h2{font-size:clamp(29px,3.6vw,44px);font-weight:700}
.sec-head{max-width:720px;margin-bottom:54px}
.sec-lede{margin-top:18px;font-size:17.5px;color:var(--ink-2);max-width:62ch}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px 24px;transition:transform .2s,border-color .2s,background .2s}
.card:hover{transform:translateY(-3px);border-color:var(--line-2);background:var(--surface-2)}
.card h3{font-size:19px;font-weight:600;margin-bottom:10px}
.card p{margin:0;font-size:15px;color:var(--ink-2)}
.ico{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;
  margin-bottom:18px;background:linear-gradient(140deg,rgba(122,92,255,.22),rgba(23,211,167,.16));
  border:1px solid var(--line-2)}
.ico svg{width:21px;height:21px;fill:none;stroke:#CFE0FF;stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round}

/* routing */
.routing-grid,.sec-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.ticks{list-style:none;margin:26px 0 0;padding:0;display:flex;flex-direction:column;gap:12px}
.ticks li{position:relative;padding-left:30px;color:var(--ink-2);font-size:15.5px}
.ticks li::before{content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:2px solid var(--mint);border-bottom:2px solid var(--mint);transform:rotate(-45deg)}

.diagram{position:relative;display:grid;grid-template-columns:auto 120px auto;align-items:center;
  gap:0;padding:28px 24px;min-height:300px}
.dg-col{display:flex;flex-direction:column;gap:12px}
.dg-right{gap:22px}
.node{border:1px solid var(--line-2);border-radius:11px;padding:10px 14px;font-size:14px;
  background:var(--surface-2);color:var(--ink-2);white-space:nowrap}
.node-you{background:var(--surface);color:var(--ink);font-weight:600}
.dg-wires{width:120px;height:260px}
.dg-wires path{fill:none;stroke:#2C4160;stroke-width:1.4;
  stroke-dasharray:5 6;animation:dash 14s linear infinite}
@keyframes dash{to{stroke-dashoffset:-220}}
.dg-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  display:flex;flex-direction:column;align-items:center;text-align:center;
  font-family:var(--disp);font-weight:600;font-size:14px;padding:12px 16px;border-radius:12px;
  background:rgba(10,16,26,.92);border:1px solid var(--line-2);
  box-shadow:0 0 40px -8px rgba(122,92,255,.5);max-width:190px}
.dg-core span{font-family:var(--sans);font-weight:400;font-size:11.5px;color:var(--muted);
  margin-top:5px;line-height:1.5}

/* developers */
.code-block{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.tabs{display:flex;gap:4px;padding:10px 12px;border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.02);overflow-x:auto}
.tabs button{font:inherit;font-size:14px;font-weight:500;color:var(--muted);cursor:pointer;
  background:transparent;border:1px solid transparent;border-radius:9px;padding:7px 14px;white-space:nowrap;
  transition:color .16s,background .16s,border-color .16s}
.tabs button:hover{color:var(--ink-2)}
.tabs button[aria-selected="true"]{color:var(--ink);background:var(--surface-2);border-color:var(--line-2)}
.tab-panes pre{margin:0;padding:24px 26px;overflow-x:auto;
  font-family:var(--mono);font-size:13.2px;line-height:1.72;color:#CBD8E8}
.tab-panes .c{color:#5C7089}
.tab-panes .s{color:var(--mint)}
.dev-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}
.note{border:1px solid var(--line);border-radius:14px;padding:20px}
.note b{font-family:var(--disp);font-size:16px;display:block;margin-bottom:6px}
.note p{margin:0;font-size:14.5px;color:var(--ink-2)}

/* security */
.invariants{padding:28px 26px}
.invariants h3{font-size:18px;margin-bottom:20px;color:var(--ink)}
.inv{padding:16px 0;border-top:1px solid var(--line)}
.inv b{font-family:var(--disp);font-size:16px;color:var(--ink)}
.inv p{margin:6px 0 0;font-size:14.5px;color:var(--ink-2)}

/* roadmap */
.timeline{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.timeline li{border:1px solid var(--line);border-radius:var(--r);padding:24px;background:var(--surface);
  position:relative;overflow:hidden}
.timeline li::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:var(--line-2)}
.state-done::before{background:var(--mint)!important}
.state-wip::before{background:var(--blue)!important}
.state-next::before{background:var(--violet)!important}
.tl-badge{display:inline-block;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--muted);border:1px solid var(--line-2);border-radius:7px;
  padding:3px 9px;margin-bottom:14px}
.state-done .tl-badge{color:var(--mint);border-color:rgba(23,211,167,.35)}
.state-wip .tl-badge{color:#8FB4FF;border-color:rgba(62,123,255,.35)}
.state-next .tl-badge{color:#B9A6FF;border-color:rgba(122,92,255,.35)}
.timeline h3{font-size:19px;font-weight:600;margin-bottom:10px}
.timeline p{margin:0;font-size:15px;color:var(--ink-2)}

/* cta */
.cta-section{padding:96px 0 110px}
.cta{text-align:center;max-width:720px;margin:0 auto;padding:56px 40px;border-radius:24px;
  border:1px solid var(--line-2);
  background:radial-gradient(700px 300px at 50% -30%,rgba(122,92,255,.28),transparent 70%),var(--surface)}
.cta p{margin:20px auto 0;color:var(--ink-2);max-width:56ch}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px}

/* footer */
.site-foot{border-top:1px solid rgba(255,255,255,.06);padding:44px 0 56px;background:rgba(0,0,0,.25)}
.foot-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.foot-brand{display:flex;align-items:center;gap:11px;font-family:var(--disp)}
.foot-nav{display:flex;gap:24px;flex-wrap:wrap;font-size:14.5px;color:var(--muted)}
.foot-nav a:hover{color:var(--ink)}
.foot-legal{margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.05);
  display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.foot-legal p{margin:0;max-width:70ch}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;scroll-behavior:auto}
}

/* ── responsive ─────────────────────────────────────────────────────────── */
@media (max-width:1020px){
  .cards,.dev-notes,.timeline{grid-template-columns:repeat(2,1fr)}
  .hero-grid,.routing-grid,.sec-grid{grid-template-columns:1fr;gap:52px}
  .hero{padding-top:64px}
  .card-preview{position:static;width:auto;margin-top:16px}
}
@media (max-width:760px){
  .head-nav{position:absolute;top:72px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(7,11,18,.98);border-bottom:1px solid var(--line);padding:8px 24px 18px;display:none}
  .head-nav.open{display:flex}
  .head-nav a{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}
  .head-cta{display:none}
  .burger{display:flex;margin-left:auto}
  .cards,.dev-notes,.timeline{grid-template-columns:1fr}
  .section{padding:72px 0}
  .hero-stats{gap:24px}
  .diagram{grid-template-columns:1fr;justify-items:center;gap:16px;min-height:0}
  .dg-wires{display:none}
  .dg-core{position:static;transform:none}
  .dg-right{flex-direction:row;flex-wrap:wrap;justify-content:center;gap:10px}
  .cta{padding:40px 24px}
  .tab-panes pre{font-size:12.2px;padding:18px}
}