/* ============================================================
   NPX Exchange — modern fintech platform identity
   ============================================================ */
:root{
  --navy:#071426;
  --navy-2:#0d2038;
  --ink:#10233f;
  --slate:#5b6b82;
  --line:#dbe4ef;
  --bg:#f4f8fd;
  --white:#ffffff;
  --cyan:#00b8e6;
  --cyan-2:#4fe0ff;
  --blue:#1d6cf3;
  --mint:#12c8a0;
  --radius:18px;
  --sans:"Inter","Segoe UI",Arial,sans-serif;
  --display:"Space Grotesk","Segoe UI",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}
.eyebrow{font-family:var(--display);font-size:11.5px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan)}
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);letter-spacing:-.02em}

/* header */
.topbar{background:var(--navy);color:#93a6c2;font-size:12.5px}
.topbar .wrap{display:flex;justify-content:space-between;gap:18px;padding-top:9px;padding-bottom:9px}
.topbar b{color:#e8f6ff;font-weight:500}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:11px;color:var(--ink)}
.logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;color:#fff;font-family:var(--display);font-weight:700;font-size:13px;letter-spacing:.02em;box-shadow:0 8px 20px rgba(29,108,243,.28)}
.logo-text{font-family:var(--display);font-weight:700;font-size:19px;letter-spacing:-.01em}
.logo-text small{display:block;font-family:var(--sans);font-size:9.5px;letter-spacing:.18em;color:var(--slate);font-weight:600;margin-top:1px}
.navlinks{display:flex;gap:30px;align-items:center}
.navlinks a{color:#33455f;font-size:14px;font-weight:500}
.navlinks a:hover{color:var(--blue)}
.navlinks a[aria-current="page"]{color:var(--blue)}
.nav-cta{background:var(--navy);color:#fff !important;padding:10px 18px;border-radius:999px;font-size:13.5px !important;box-shadow:0 6px 16px rgba(7,20,38,.18)}
.nav-cta:hover{background:var(--blue)}

/* hero */
.hero{position:relative;background:radial-gradient(900px 500px at 78% 18%,rgba(0,184,230,.20),transparent 60%),radial-gradient(700px 460px at 12% 82%,rgba(29,108,243,.20),transparent 62%),var(--navy);color:#e8f2ff;overflow:hidden;padding:86px 0 96px}
.hero::after{content:"";position:absolute;inset:0;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:54px 54px;mask-image:linear-gradient(to bottom,black,transparent 85%);pointer-events:none}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.02fr .98fr;gap:60px;align-items:center}
.hero h1{color:#fff;font-size:clamp(42px,5vw,64px);line-height:1.04;font-weight:600;margin:18px 0 22px}
.hero h1 span{background:linear-gradient(90deg,var(--cyan-2),#7ea8ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18.5px;color:#b9c9de;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:14.5px;transition:.2s;border:1px solid transparent}
.btn.primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 12px 30px rgba(0,184,230,.28)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(0,184,230,.36)}
.btn.ghost{border-color:rgba(255,255,255,.26);color:#e8f2ff}
.btn.ghost:hover{background:rgba(255,255,255,.08)}
.hero-badges{display:flex;gap:22px;margin-top:34px;font-size:12.5px;color:#8ea5c2;flex-wrap:wrap}
.hero-badges span::before{content:"◆";color:var(--cyan);margin-right:8px;font-size:8px;vertical-align:2px}

/* trading panel mock */
.panel{background:rgba(10,26,46,.78);border:1px solid rgba(120,190,255,.22);border-radius:22px;padding:18px;box-shadow:0 30px 80px rgba(0,0,0,.4);backdrop-filter:blur(12px);position:relative}
.panel-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(120,190,255,.14);padding-bottom:13px;margin-bottom:14px}
.panel-title{font-family:var(--display);font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:#9fb6d4}
.panel-dots{display:flex;gap:5px}
.panel-dots i{width:8px;height:8px;border-radius:50%;background:#2b4a70;display:block}
.panel-dots i:first-child{background:#2ee6a8}
.pair{display:flex;align-items:baseline;gap:10px;margin-bottom:4px}
.pair b{font-family:var(--display);font-size:24px;color:#fff;letter-spacing:-.02em}
.pair span{font-size:12px;color:#2ee6a8;background:rgba(46,230,168,.1);padding:3px 8px;border-radius:6px}
.price{font-family:var(--display);font-size:38px;color:#fff;letter-spacing:-.03em}
.price small{font-size:13px;color:#8098b8;letter-spacing:0}
.spark{margin:14px 0 12px;width:100%;height:110px}
.orders{display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:11.5px}
.book{background:rgba(4,14,26,.6);border-radius:10px;padding:10px}
.book div{display:flex;justify-content:space-between;padding:3.5px 0;font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:10.5px;color:#8fa7c6}
.book .ask span:last-child{color:#ff7b8a}
.book .bid span:last-child{color:#2ee6a8}
.panel-foot{display:flex;justify-content:space-between;margin-top:14px;padding-top:12px;border-top:1px solid rgba(120,190,255,.14);font-size:10.5px;color:#7b93b3;letter-spacing:.06em}
.panel-foot b{color:#cfe4ff;font-weight:500}

/* logos / stat band */
.trust{border-bottom:1px solid var(--line);background:#fff}
.trust .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.trust div{padding:26px 24px;border-left:1px solid var(--line)}
.trust div:first-child{border-left:0;padding-left:0}
.trust b{font-family:var(--display);font-size:28px;color:var(--ink);display:block;line-height:1.1}
.trust span{font-size:12px;color:var(--slate);letter-spacing:.04em}

/* sections */
section{padding:88px 0}
.section-head{max-width:760px;margin-bottom:46px}
.section-head h2{font-size:clamp(30px,3.6vw,44px);line-height:1.12;font-weight:600;margin-top:12px}
.section-head p{color:var(--slate);margin-top:14px;font-size:17px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split.rev .fig{order:2}
.fig{border-radius:var(--radius);overflow:hidden;box-shadow:0 24px 60px rgba(16,35,63,.14);position:relative}
.fig img{width:100%;height:100%;object-fit:cover}
.fig .chip{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-radius:12px;padding:10px 14px;font-size:12px;color:var(--ink);box-shadow:0 8px 24px rgba(16,35,63,.16)}
.fig .chip b{font-family:var(--display);font-size:16px;display:block}
.feature-list{margin-top:26px}
.feature-list li{list-style:none;display:flex;gap:14px;padding:13px 0;border-bottom:1px solid var(--line);font-size:15.5px;color:#33455f}
.feature-list li:last-child{border-bottom:0}
.feature-list b{color:var(--ink);font-weight:600}
.tick{flex:0 0 22px;height:22px;border-radius:50%;background:rgba(0,184,230,.12);color:var(--cyan);display:grid;place-items:center;font-size:11px;margin-top:2px}

/* service cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.22s;position:relative;overflow:hidden}
.svc::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));opacity:0;transition:.22s}
.svc:hover{transform:translateY(-4px);box-shadow:0 20px 48px rgba(16,35,63,.10);border-color:#c7d9ee}
.svc:hover::before{opacity:1}
.icon{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#eaf3ff,#e3fbff);display:grid;place-items:center;margin-bottom:18px}
.icon svg{width:22px;height:22px;stroke:var(--blue);fill:none;stroke-width:1.6}
.svc h3{font-size:20px;font-weight:600;margin-bottom:9px}
.svc p{font-size:14.5px;color:var(--slate)}
.svc .link{display:inline-block;margin-top:16px;font-size:13px;font-weight:600;color:var(--blue)}

/* dark band */
.dark{background:var(--navy);color:#c9d8ea;position:relative;overflow:hidden}
.dark::before{content:"";position:absolute;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,rgba(0,184,230,.16),transparent 65%);right:-140px;top:-260px}
.dark h2,.dark h3{color:#fff}
.dark .section-head p{color:#9fb3cc}
.dark .svc{background:rgba(255,255,255,.045);border-color:rgba(140,190,255,.16)}
.dark .svc h3{color:#fff}
.dark .svc p{color:#9fb3cc}
.dark .icon{background:rgba(0,184,230,.12)}
.dark .icon svg{stroke:var(--cyan-2)}

/* metrics strip */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.metric{background:#fff;padding:30px 26px}
.metric b{font-family:var(--display);font-size:34px;line-height:1;display:block;color:var(--ink)}
.metric span{display:block;margin-top:8px;font-size:12.5px;color:var(--slate)}

/* process steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-top:24px;border-top:2px solid var(--line)}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--display);font-size:12px;font-weight:600;letter-spacing:.16em;color:var(--cyan);position:absolute;top:-11px;background:var(--bg);padding-right:10px}
.step h3{font-size:18px;margin:8px 0 8px}
.step p{font-size:14px;color:var(--slate)}

/* CTA */
.cta{background:linear-gradient(120deg,#0b1e36,#123a63 55%,#0e6a86);color:#fff;border-radius:26px;padding:54px;display:grid;grid-template-columns:1.4fr .6fr;gap:30px;align-items:center;box-shadow:0 30px 70px rgba(16,35,63,.24)}
.cta h2{color:#fff;font-size:clamp(28px,3.2vw,40px);line-height:1.14}
.cta p{color:#b8cbe0;margin-top:12px;max-width:640px}
.cta .actions{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap}

/* page hero */
.page-hero{background:var(--navy);color:#fff;padding:72px 0 70px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(650px 380px at 82% 20%,rgba(0,184,230,.18),transparent 60%)}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:clamp(36px,4.6vw,56px);line-height:1.06;font-weight:600;max-width:900px;margin:14px 0 16px}
.page-hero p{color:#a9bdd6;max-width:700px;font-size:17.5px}
.crumb{font-size:12px;color:#7f96b5;letter-spacing:.08em}
.crumb a{color:#9fc6ff}

/* prose */
.prose{max-width:760px}
.prose h2{font-size:30px;margin:40px 0 14px;line-height:1.18}
.prose h3{font-size:21px;margin:28px 0 9px}
.prose p{margin-bottom:18px;color:#33455f}
.prose ul,.prose ol{margin:0 0 20px 20px;color:#33455f}
.prose li{margin-bottom:9px}
.prose strong{color:var(--ink)}
.note{background:#fff;border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:0 12px 12px 0;padding:20px 24px;margin:26px 0;font-size:14.5px;color:var(--slate)}

/* tables */
.table-wrap{overflow-x:auto;max-width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;margin:26px 0}
pre{max-width:100%;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
th{background:#f7faff;font-family:var(--display);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--slate)}
tr:last-child td{border-bottom:0}
td{color:#33455f}

/* article layout */
.doc{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:64px;align-items:start;padding-top:64px;padding-bottom:90px}
.doc > *{min-width:0}
.doc aside{position:sticky;top:96px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:18px}
.side-card h4{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--slate);margin-bottom:13px}
.side-card a{display:block;padding:8px 0;border-bottom:1px solid #eef3f9;font-size:14px;color:#33455f}
.side-card a:last-child{border-bottom:0}
.side-card a:hover{color:var(--blue)}

/* faq */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{cursor:pointer;font-family:var(--display);font-size:18px;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--cyan);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:12px;color:var(--slate);font-size:15px;max-width:760px}

/* footer */
footer{background:var(--navy);color:#8fa4c0;padding:64px 0 28px;font-size:14px}
.foot{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
.foot h4{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:#6f88a8;margin-bottom:14px}
.foot a{display:block;color:#a9bdd6;margin-bottom:9px;font-size:13.5px}
.foot a:hover{color:#fff}
.foot .logo-text{color:#fff}
.foot .logo-text small{color:#7f96b5}
.foot p{font-size:12.5px;line-height:1.7;color:#7f96b5;margin-top:16px;max-width:360px}
.foot-bottom{margin-top:46px;padding-top:20px;border-top:1px solid #1a3050;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:11.5px;color:#647b9b}
.foot-bottom a{display:inline;color:#8fa4c0}

/* responsive */
@media(max-width:1000px){
  .hero .wrap,.split,.cta{grid-template-columns:1fr;gap:44px}
  .doc{grid-template-columns:minmax(0,1fr);gap:44px}
  .grid-3,.steps{grid-template-columns:1fr 1fr}
  .trust .wrap,.metrics{grid-template-columns:1fr 1fr}
  .trust div:nth-child(3){border-left:0}
  .doc aside{position:static}
  .foot{grid-template-columns:1fr 1fr}
  .navlinks{display:none}
  .split.rev .fig{order:0}
}
@media(max-width:640px){
  .wrap{padding:0 18px}
  .hero{padding:56px 0 64px}
  .grid-3,.steps,.foot{grid-template-columns:1fr}
  .trust .wrap{grid-template-columns:1fr 1fr}
  .trust div{padding:20px 12px;border-left:0;border-top:1px solid var(--line)}
  .trust div:first-child{padding-left:12px}
  .cta{padding:34px 24px}
  .cta .actions{justify-content:flex-start}
  section{padding:60px 0}
  .topbar .wrap span:last-child{display:none}
  .panel{padding:14px}
  .price{font-size:30px}
  .doc{padding-top:44px;padding-bottom:60px}
  th,td{padding:10px 12px;font-size:12.5px}
}