:root{
  --bg-0:#0a0f2a;
  --bg-1:#111a4a;
  --bg-2:#1b2b79;
  --glass: rgba(255,255,255,0.07);
  --glass-2: rgba(255,255,255,0.10);
  --stroke: rgba(255,255,255,0.10);
  --text: #eaf1ff;
  --muted: rgba(234,241,255,0.78);
  --cta1:#2bb3ff;
  --cta2:#2f6bff;
  --shadow: 0 18px 55px rgba(0,0,0,0.35);
}

html,body{height:auto;}
html{scroll-behavior:smooth}
body{
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    linear-gradient(180deg, rgba(10,16,48,0.25) 0%, rgba(7,10,24,0.88) 100%),
    url("../img/hero-bg.jpg") center top / cover no-repeat fixed;
  color: var(--text);
}

.site{
  min-height: 100vh;
  position: relative;
}

/* starfield overlay */
.site::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 18% 22%, rgba(255,255,255,0.75) 0 1px, transparent 2px),
    radial-gradient(circle at 35% 12%, rgba(255,255,255,0.55) 0 1px, transparent 2px),
    radial-gradient(circle at 64% 18%, rgba(255,255,255,0.55) 0 1px, transparent 2px),
    radial-gradient(circle at 74% 28%, rgba(255,255,255,0.50) 0 1px, transparent 2px),
    radial-gradient(circle at 84% 14%, rgba(255,255,255,0.60) 0 1px, transparent 2px),
    radial-gradient(circle at 22% 55%, rgba(255,255,255,0.35) 0 1px, transparent 2px),
    radial-gradient(circle at 48% 45%, rgba(255,255,255,0.30) 0 1px, transparent 2px),
    radial-gradient(circle at 78% 52%, rgba(255,255,255,0.28) 0 1px, transparent 2px);
  opacity: .55;
  mix-blend-mode: screen;
}

/* soft vignette */
.site::after{
  content:"";
  position:absolute;
  inset:-2px;
  pointer-events:none;
  background: radial-gradient(1200px 820px at 50% 10%, rgba(0,0,0,0) 0%, rgba(0,0,0,0.22) 55%, rgba(0,0,0,0.35) 100%);
}

/* ensure content above overlays */
.site > *{ position:relative; z-index:1; }

/* Topbar */
.topbar{
  background: rgba(6, 10, 26, 0.62);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
}
.navbar .nav-link{
  color: rgba(234,241,255,0.78);
  font-weight: 500;
  font-size: 0.92rem;
}
.navbar .nav-link:hover{ color: rgba(234,241,255,0.95); }

.brand-badge{
  width: 44px; height: 44px;
  border-radius: 999px;
  display:grid; place-items:center;
  background: radial-gradient(circle at 30% 20%, rgba(158,240,255,0.25), rgba(0,0,0,0) 60%),
              rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 10px 26px rgba(0,0,0,0.35);
}
.brand-title{ font-weight: 700; letter-spacing: -0.02em; }
.brand-subtitle{ font-size: 0.80rem; opacity: 0.8; margin-top: -2px; }

/* CTA */
.btn-cta{
  color: #e9f6ff;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.16);
  background: linear-gradient(180deg, rgba(43,179,255,0.95), rgba(47,107,255,0.92));
  box-shadow: 0 12px 30px rgba(43,179,255,0.18), inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn-cta:hover{
  color:#fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(43,179,255,0.22), inset 0 1px 0 rgba(255,255,255,0.28);
}
.btn-cta:active{ transform: translateY(0); }

/* Hero */
.hero{
  padding: 56px 0 26px;
  position: relative;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(900px 420px at 18% 26%, rgba(50,140,255,0.26), rgba(0,0,0,0) 62%),
    radial-gradient(820px 460px at 88% 20%, rgba(255,130,180,0.20), rgba(0,0,0,0) 62%),
    radial-gradient(880px 520px at 55% 74%, rgba(255,200,120,0.10), rgba(0,0,0,0) 60%);
  opacity: 0.9;
  pointer-events:none;
}
.hero-title{
  font-size: clamp(2.15rem, 2.2vw + 1.6rem, 3.05rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-shadow: 0 12px 40px rgba(0,0,0,0.35);
}
.hero-subtitle{
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.35;
}

/* Hero orb (pure CSS) */
.hero-orb{
  width: min(440px, 92vw);
  aspect-ratio: 1 / 1;
  border-radius: 999px;
  background:
    radial-gradient(circle at 35% 30%, rgba(255,255,255,0.20), rgba(255,255,255,0) 55%),
    radial-gradient(circle at 70% 25%, rgba(80,170,255,0.30), rgba(0,0,0,0) 60%),
    radial-gradient(circle at 30% 75%, rgba(255,190,120,0.18), rgba(0,0,0,0) 62%),
    linear-gradient(180deg, rgba(70,120,255,0.25), rgba(40,55,160,0.08));
  border: 3px solid rgba(120,190,255,0.45);
  box-shadow: 0 26px 70px rgba(0,0,0,0.35);
  position: relative;
  display:grid;
  place-items:center;
}
.hero-orb::before{
  content:"";
  position:absolute;
  inset:-10px;
  border-radius: 999px;
  background: radial-gradient(circle at 60% 30%, rgba(120,190,255,0.22), rgba(0,0,0,0) 60%);
  filter: blur(10px);
}
.hero-orb-inner{
  width: 92%;
  height: 92%;
  border-radius: 999px;
  position: relative;
  overflow:hidden;
  background: rgba(0,0,0,0.12);
  border: 2px solid rgba(255,255,255,0.10);
}
.hero-emblem-img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display:block;
  transform: scale(1.02);
  filter: drop-shadow(0 18px 40px rgba(0,0,0,0.35));
}

/* Card image backgrounds */
.glass-card{
  background-size: cover;
  background-position: center;
}
.glass-card.bg-what{ background-image: url("../img/card-what.jpg"); }
.glass-card.bg-why{ background-image: url("../img/card-why.jpg"); }
.glass-card.bg-join{ background-image: url("../img/card-join.jpg"); }
.glass-card.bg-node{ background-image: url("../img/card-node.jpg"); }
.glass-card.bg-range{ background-image: url("../img/card-range.jpg"); }
.glass-card.bg-offgrid{ background-image: url("../img/card-offgrid.jpg"); }
.glass-card.bg-community{ background-image: url("../img/card-community.jpg"); }

/* Sections */
.section{
  padding: 26px 0 18px;
}
.section-tight{
  padding: 18px 0 30px;
}
.section-title{
  font-weight: 800;
  letter-spacing: -0.02em;
  text-shadow: 0 14px 40px rgba(0,0,0,0.35);
}

/* Glass cards */
.glass-card{
  position: relative;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.04));
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.glass-card::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background: radial-gradient(420px 220px at 20% 0%, rgba(120,220,255,0.14), rgba(0,0,0,0) 60%),
              radial-gradient(420px 220px at 80% 20%, rgba(255,160,200,0.10), rgba(0,0,0,0) 60%);
  opacity: 0.85;
}

.glass-card-body{
  position: relative;
  z-index: 1;
  padding: 18px 18px 18px;
}
.card-lg .glass-card-body{ padding: 20px 20px 22px; }
.card-sm .glass-card-body{ padding: 18px 18px 18px; }

.card-icon{
  width: 56px; height: 56px;
  border-radius: 16px;
  display:grid;
  place-items:center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 14px 30px rgba(0,0,0,0.25);
  margin-bottom: 12px;
}
.card-icon.small{
  width: 50px; height: 50px;
  border-radius: 14px;
}

.card-title{
  margin: 0 0 6px;
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: 1.02rem;
}
.card-text{
  margin: 0;
  color: rgba(234,241,255,0.75);
  font-size: 0.92rem;
  line-height: 1.35;
}

/* decorative card illustrations */
.card-ill{
  position:absolute;
  inset:0;
  opacity: 0.95;
  pointer-events:none;
  background:
    radial-gradient(420px 220px at 20% 20%, rgba(50,140,255,0.22), rgba(0,0,0,0) 60%),
    radial-gradient(420px 220px at 85% 20%, rgba(255,160,200,0.18), rgba(0,0,0,0) 62%),
    radial-gradient(500px 260px at 60% 120%, rgba(255,200,120,0.12), rgba(0,0,0,0) 60%);
}
.card-ill-left{ background-position: 0 0; }
.card-ill-mid{ filter: hue-rotate(12deg) saturate(1.05); }
.card-ill-right{ filter: hue-rotate(-10deg) saturate(1.08); }
.card-ill-s1{ filter: hue-rotate(18deg) saturate(1.06); }
.card-ill-s2{ filter: hue-rotate(-6deg) saturate(1.06); }
.card-ill-s3{ filter: hue-rotate(35deg) saturate(1.05); }
.card-ill-s4{ filter: hue-rotate(-22deg) saturate(1.06); }

/* Footer */
.footer{
  padding: 16px 0 18px;
  background: rgba(6, 10, 26, 0.55);
  border-top: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
}
.footer-inner{
  color: rgba(234,241,255,0.75);
  font-size: 0.86rem;
}
.footer-link{
  color: rgba(234,241,255,0.80);
  text-decoration: none;
}
.footer-link:hover{ color: rgba(234,241,255,0.95); text-decoration: underline; }

/* spacing tweaks to mimic screenshot */
@media (min-width: 992px){
  .hero{ padding: 60px 0 28px; }
  .section{ padding: 28px 0 18px; }
}