:root{
  --bg:#0b1220;            /* deep navy */
  --bg-elev:#0f1830;
  --text:#e6f1ff;
  --text-dim:#98a6c7;
  --neon:#00e0ff;          /* neon blue */
  --neon-2:#00b3ff;
  --card:#111a34;
  --border:rgba(255,255,255,0.08);
  --shadow:0 10px 30px rgba(0,0,0,0.35);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(0,224,255,0.15), transparent 60%),
    radial-gradient(800px 400px at 10% 0%, rgba(0,179,255,0.12), transparent 60%),
    var(--bg);
  font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  line-height:1.6;
}

.container{width:min(1180px, 92%); margin:0 auto}

/* Header */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(11,18,32,0.65);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex; align-items:center; justify-content:space-between; padding:14px 0}
.brand{display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--text)}
.brand-logo{width:48px; height:48px; object-fit:contain; transform:scale(1.3); transform-origin:left center}
.brand-logo.small{width:28px; height:28px}
.brand-name{font-family:Montserrat, Inter, sans-serif; font-weight:800; letter-spacing:0.4px}

.nav-toggle{display:none; background:none; color:var(--text); border:1px solid var(--border); padding:8px 10px; border-radius:8px; font-size:18px}
.nav-menu{display:flex; gap:18px; list-style:none; margin:0; padding:0}
.nav-link{color:var(--text-dim); text-decoration:none; padding:10px 12px; border-radius:8px; transition:color .2s, background .2s}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--bg); background:linear-gradient(90deg, var(--neon), var(--neon-2));}
.nav-link.external{border:1px solid var(--border)}

/* Sections */
.section{padding:88px 0}
.section-title{font-family:Montserrat, Inter, sans-serif; font-size:34px; line-height:1.2; margin:0 0 18px}
.section-intro{color:var(--text-dim); margin:0 0 28px}
.lead{font-size:20px; color:var(--text-dim)}
.display{font-family:Montserrat, Inter, sans-serif; font-size:48px; line-height:1.1; margin:0 0 14px; letter-spacing:0.2px}
.center{text-align:center}
.muted{color:var(--text-dim)}
.mt-lg{margin-top:28px}

/* Hero */
.hero{padding:120px 0 90px; position:relative; overflow:hidden}
.hero-inner{display:grid; grid-template-columns:1.15fr 0.85fr; gap:40px; align-items:center}
.cta{display:flex; gap:12px; margin-top:18px}
.btn{display:inline-flex; align-items:center; justify-content:center; padding:12px 18px; border-radius:12px; text-decoration:none; font-weight:600; border:1px solid var(--border); color:var(--text)}
.btn-primary{background:linear-gradient(90deg, var(--neon), var(--neon-2)); color:#00121a; box-shadow:0 8px 20px rgba(0,224,255,0.25)}
.btn-primary:hover{filter:saturate(1.05) brightness(1.05)}
.btn-ghost{background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,0.06)}
.hero-art{position:relative; height:360px}
.orb{position:absolute; inset:10% 0 0 10%; width:80%; height:80%; border-radius:50%;
  background:radial-gradient(closest-side, rgba(0,224,255,0.35), rgba(0,224,255,0.08) 55%, transparent 60%),
             radial-gradient(circle at 30% 30%, rgba(0,179,255,0.6), transparent 60%);
  filter:blur(2px); box-shadow:0 0 120px rgba(0,224,255,0.25);
}

/* Cards */
.cards{display:grid; grid-template-columns:repeat(3,1fr); gap:18px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); border:1px solid var(--border); padding:18px; border-radius:16px; box-shadow:var(--shadow)}
.card-emoji{font-size:22px; margin-bottom:6px}
.card h3{margin:6px 0 6px; font-family:Montserrat, Inter, sans-serif}
.card p{margin:0; color:var(--text-dim)}

/* Token */
.split{display:grid; grid-template-columns:1fr 1fr; gap:26px; align-items:start; margin:10px 0 0}
.checklist{list-style:none; padding:0; margin:8px 0 0}
.checklist li{padding-left:0; margin:8px 0}
.table-wrap{overflow:auto; border:1px solid var(--border); border-radius:12px; background:rgba(255,255,255,0.02)}
table{width:100%; border-collapse:collapse; min-width:520px}
th, td{padding:12px 14px; border-bottom:1px solid var(--border); text-align:left}
thead th{font-weight:600; color:var(--text)}
tbody td{color:var(--text-dim)}
.token-summary{display:flex; gap:20px; flex-wrap:wrap; margin-top:14px; color:var(--text-dim)}

/* Features */
.features-list{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:10px; padding:0; list-style:none}
.features-list li{background:linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); border:1px solid var(--border); padding:14px; border-radius:12px}

/* Roadmap */
.timeline{list-style:none; padding:0; margin:0; display:grid; gap:14px}
.timeline li{position:relative; padding:12px 14px 12px 18px; border-left:2px solid var(--neon); background:rgba(255,255,255,0.02); border-radius:8px}
.timeline h3{margin:0 0 6px; font-family:Montserrat, Inter, sans-serif}
.timeline p{margin:0; color:var(--text-dim)}

/* FAQ */
.accordion{display:grid; gap:10px}
.accordion-item{background:rgba(255,255,255,0.03); border:1px solid var(--border); border-radius:12px; padding:0}
.accordion-item > summary{cursor:pointer; list-style:none; padding:14px 16px; font-weight:600}
.accordion-item > summary::-webkit-details-marker{display:none}
.accordion-item[open] > summary{color:var(--bg); background:linear-gradient(90deg, var(--neon), var(--neon-2)); border-radius:12px 12px 0 0}
.accordion-item .content{padding:14px 16px; color:var(--text-dim)}

/* OS Overview & Vision */
.bullets{margin:8px 0 0}
.bullets li{margin:6px 0}
.quote{margin:16px 0; padding:14px 16px; border-radius:12px; border:1px solid var(--border); background:rgba(255,255,255,0.02)}
.quote-text{margin:0; font-family:Montserrat, Inter, sans-serif; font-weight:700}

/* Footer */
.site-footer{background:var(--bg-elev); border-top:1px solid var(--border); padding:32px 0 18px}
.footer-grid{display:grid; grid-template-columns: 1.1fr .9fr .9fr; gap:20px}
.footer-grid h4{margin:0 0 10px}
.footer-grid ul{list-style:none; padding:0; margin:0; display:grid; gap:8px}
.footer-grid a{color:var(--text-dim); text-decoration:none}
.footer-grid a:hover{color:var(--text)}
.copyright{margin-top:24px}
.tiny{font-size:12px}

/* Utilities */
a{color:var(--neon)}

/* Footer CTAs */
.footer-cta{display:flex; gap:12px; justify-content:flex-start; align-items:center; flex-wrap:wrap; width:100%; margin:12px 0 8px}
.pill{display:inline-flex; align-items:center; gap:10px; padding:10px 14px; border:1px solid var(--border); border-radius:999px; text-decoration:none; color:var(--text); background:rgba(255,255,255,0.03); box-shadow:0 6px 18px rgba(0,0,0,0.25)}
.pill:hover{border-color:rgba(0,224,255,0.3)}
.pill-icon{display:inline-flex; align-items:center; justify-content:center; width:18px; height:18px; border-radius:6px; background:linear-gradient(90deg, var(--neon), var(--neon-2)); color:#00121a; font-weight:700}
.pill-text{font-weight:600}

/* Footer link icons */
.footer-grid .icon{display:inline-flex; align-items:center; justify-content:center; width:18px; height:18px; margin-right:8px; border-radius:6px; background:linear-gradient(90deg, var(--neon), var(--neon-2)); color:#00121a; font-weight:700}

/* ZK Showcase */
.zk-showcase{padding-top:40px}
.badge{display:inline-block; padding:6px 10px; border-radius:999px; border:1px solid var(--border); background:rgba(255,255,255,0.04); color:var(--neon); font-weight:600; font-size:12px; letter-spacing:.3px}
.zk-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:24px; align-items:center; margin-top:16px}
.zk-art{position:relative; height:320px; border-radius:18px; background:radial-gradient(600px 300px at 20% 20%, rgba(0,224,255,0.12), transparent 60%), linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02)); border:1px solid var(--border); overflow:hidden}
.zk-card{position:absolute; inset:auto 20% 14% 8%; background:rgba(0,0,0,0.45); border:1px solid var(--border); border-radius:16px; box-shadow:0 20px 50px rgba(0,0,0,0.35)}
.zk-card.layer-1{inset:18% 24% auto 12%; height:42%}
.zk-card.layer-2{inset:36% 14% 14% 22%}
.zk-chip{position:absolute; width:18px; height:18px; left:26px; top:26px; border-radius:6px; background:linear-gradient(90deg, var(--neon), var(--neon-2)); box-shadow:0 0 30px rgba(0,224,255,0.55)}
.zk-panel{background:rgba(255,255,255,0.03); border:1px solid var(--border); border-radius:14px; padding:16px}
.panel-title{margin:0 0 10px; font-family:Montserrat, Inter, sans-serif}
.steps{margin:0; padding-left:18px; color:var(--text-dim); display:grid; gap:8px}

/* Responsive */
@media (max-width: 980px){
  .hero-inner{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr}
  .features-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .zk-grid{grid-template-columns:1fr}
}

@media (max-width: 720px){
  .display{font-size:38px}
  .section{padding:70px 0}
  .nav-toggle{display:inline-block}
  .nav-menu{position:absolute; top:62px; right:4%; left:4%; display:none; flex-direction:column; gap:6px; background:rgba(11,18,32,0.95); border:1px solid var(--border); border-radius:12px; padding:8px}
  .nav-menu.open{display:flex}
}