:root{
  --bg-900:#000a1f;
  --bg-800:#031331;
  --bg-700:#06204d;
  --cta:#0025bf;
  --cta-hover:#0031e6;
  --text:#e8edff;
  --muted:#a7b2d6;
  --accent:#3d6bff;
  --border:rgba(255,255,255,.08);
  --radius:12px;
  --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;height:auto;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.25;color:#fff;margin:1.6rem 0 .8rem}
h1{font-size:2.1rem}
h2{font-size:1.5rem;margin-top:2.4rem}
h3{font-size:1.2rem}
p{margin:0 0 1.1rem}
ul,ol{margin:0 0 1.1rem;padding-left:1.3rem}
li{margin:.35rem 0}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(3,19,49,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;gap:16px;padding:12px 20px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:#fff;font-size:1.15rem}
.brand img{height:35px;width:auto}
.site-footer .brand img{height:32px;width:auto}
.nav-links{display:flex;flex-wrap:wrap;gap:14px;margin-left:auto;align-items:center}
.nav-links a{color:var(--muted);font-size:.95rem}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:#fff;text-decoration:none}
.btn{
  display:inline-block;background:var(--cta);color:#fff;font-weight:600;
  padding:11px 20px;border-radius:var(--radius);border:0;cursor:pointer;
  font-size:1rem;line-height:1.2;transition:background .15s ease;
}
.btn:hover{background:var(--cta-hover);text-decoration:none;color:#fff}
.btn-sm{padding:8px 14px;font-size:.9rem}
.nav-toggle{display:none}

/* Hero */
.hero{
  background:linear-gradient(160deg,var(--bg-800),var(--bg-900));
  border-bottom:1px solid var(--border);
  padding:56px 0;
}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:680px}

/* Sections & cards */
.section{padding:40px 0;border-bottom:1px solid var(--border)}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--bg-800);border:1px solid var(--border);
  border-radius:var(--radius);padding:22px;
}
.card h3{margin-top:.2rem}
.chip{display:inline-block;background:var(--bg-700);color:var(--muted);
  border:1px solid var(--border);border-radius:999px;padding:4px 12px;font-size:.85rem;margin:3px 6px 3px 0}

/* Breadcrumb */
.breadcrumb{font-size:.9rem;color:var(--muted);padding:14px 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:#fff}

/* CTA band */
.cta-band{background-color:var(--cta);background-image:url(/assets/img/crypto-banner.png);background-image:image-set(url(/assets/img/crypto-banner.webp) type("image/webp"),url(/assets/img/crypto-banner.png) type("image/png"));background-size:cover;background-position:center;text-align:center;padding:48px 20px;border-radius:var(--radius);margin:36px 0}
.cta-band h2{color:#fff;margin-top:0}

/* FAQ */
.faq-item{background:var(--bg-800);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin-bottom:14px}
.faq-item h3{margin:.2rem 0 .6rem;font-size:1.1rem}

/* Footer */
.site-footer{background:var(--bg-800);border-top:1px solid var(--border);padding:40px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.site-footer a{color:var(--muted);font-size:.92rem;display:block;margin:.3rem 0}
.site-footer a:hover{color:#fff}
.footer-note{color:var(--muted);font-size:.82rem;border-top:1px solid var(--border);margin-top:26px;padding-top:18px}
.footer-title{color:#fff;font-weight:600;margin-bottom:8px}

/* Utility */
.muted{color:var(--muted)}
.center{text-align:center}
.mt0{margin-top:0}
.tag-list{margin:0 0 1.1rem;padding:0;list-style:none;display:flex;flex-wrap:wrap}

/* Back to top */
.back-to-top{
  position:fixed;right:22px;bottom:22px;z-index:60;
  width:46px;height:46px;border-radius:50%;
  background:var(--cta);color:#fff;border:1px solid var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;line-height:1;cursor:pointer;
  box-shadow:0 6px 16px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .2s ease,transform .2s ease,background .15s ease;
}
.back-to-top:hover{background:var(--cta-hover)}
.back-to-top:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
@media(max-width:640px){.back-to-top{right:14px;bottom:14px;width:42px;height:42px;font-size:20px}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:opacity .2s ease}}

@media(max-width:960px){
  .grid-3{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  h1{font-size:1.7rem}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{display:none;flex-direction:column;width:100%;margin:10px 0 0}
  .nav-links.open{display:flex}
  .nav-toggle{display:inline-block;margin-left:auto;background:transparent;border:1px solid var(--border);color:#fff;border-radius:8px;padding:8px 12px;cursor:pointer}
}