/* OrbitHub — Space meets simplicity */
:root {
  --bg: #0a0e1a;
  --bg-card: #0f1629;
  --bg-card-hover: #141d35;
  --fg: #e8edf5;
  --fg-muted: #8896ae;
  --accent: #00e5ff;
  --accent-dim: rgba(0, 229, 255, 0.12);
  --amber: #f59e0b;
  --amber-dim: rgba(245, 158, 11, 0.12);
  --border: rgba(0, 229, 255, 0.12);
  --border-light: rgba(255,255,255,0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 600;
  line-height: 1.2;
}

/* Nav */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 40px;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.nav-tag {
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 40px 80px;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.06);
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
}
.orbit-ring-1 { width: 600px; height: 600px; }
.orbit-ring-2 { width: 900px; height: 900px; border-color: rgba(0, 229, 255, 0.03); }
.orbit-ring-3 { width: 1200px; height: 1200px; border-color: rgba(245, 158, 11, 0.02); }
.star {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
}
.s1 { width: 2px; height: 2px; top: 15%; left: 20%; opacity: 0.4; }
.s2 { width: 3px; height: 3px; top: 25%; right: 15%; opacity: 0.6; }
.s3 { width: 1.5px; height: 1.5px; top: 60%; left: 10%; opacity: 0.3; }
.s4 { width: 2px; height: 2px; bottom: 30%; right: 25%; opacity: 0.5; }
.s5 { width: 1px; height: 1px; top: 40%; left: 80%; opacity: 0.4; }

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 229, 255, 0.2);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 32px;
  letter-spacing: 0.03em;
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-headline {
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--fg);
}
.highlight {
  color: var(--accent);
  position: relative;
}
.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 580px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.hero-metrics {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}
.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 32px;
}
.metric-val {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}
.metric-label {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.metric-sep {
  width: 1px;
  height: 40px;
  background: var(--border-light);
}

/* Section common */
.section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber);
  margin-bottom: 12px;
  font-weight: 500;
}
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

/* How it works */
.howitworks {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
}
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.step {
  flex: 1;
  padding: 32px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  position: relative;
}
.step-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.step-icon {
  margin-bottom: 16px;
}
.step h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}
.step p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}
.step-arrow {
  display: flex;
  align-items: center;
  padding: 0 8px;
  padding-top: 60px;
  flex-shrink: 0;
}

/* Use cases */
.usecases {
  padding: 100px 40px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card) 50%, var(--bg) 100%);
}
.usecases .section-title {
  max-width: 600px;
}
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.usecase-card {
  padding: 36px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  transition: border-color 0.2s;
}
.usecase-card:hover {
  border-color: var(--border);
}
.usecase-icon {
  margin-bottom: 20px;
}
.usecase-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}
.usecase-card p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Network */
.network {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.network-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}
.network-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.network-center-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
  letter-spacing: 0.05em;
  margin-top: 8px;
}
.network-nodes {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-muted);
  white-space: nowrap;
}
.node-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.node-starlink { top: 10%; left: 50%; transform: translateX(-50%); }
.node-cellular { top: 55%; right: 5%; }
.node-fiber { bottom: 15%; left: 10%; }
.node-wifi { bottom: 30%; right: 15%; }
.network-info {
  padding-left: 40px;
}
.network-desc {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}
.network-stats {
  display: flex;
  gap: 32px;
}
.nstat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nstat-val {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
}
.nstat-label {
  font-size: 12px;
  color: var(--fg-muted);
}

/* Closing */
.closing {
  padding: 120px 40px 100px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(0,229,255,0.03) 100%);
}
.closing-headline {
  font-size: clamp(28px, 4.5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 700px;
  margin: 0 auto 28px;
  line-height: 1.2;
}
.closing-sub {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 60px 40px;
  border-top: 1px solid var(--border-light);
  text-align: center;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 16px;
  color: var(--fg);
  margin-bottom: 16px;
}
.footer-tagline {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 6px;
}
.footer-copy {
  font-size: 12px;
  color: var(--fg-muted);
  opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
  .nav { padding: 0 20px; }
  .hero { padding: 100px 20px 60px; }
  .hero-headline { font-size: 40px; }
  .hero-sub { font-size: 16px; }
  .hero-metrics { flex-direction: column; gap: 20px; }
  .metric-sep { display: none; }
  .steps { flex-direction: column; gap: 16px; }
  .step-arrow { display: none; }
  .usecases-grid { grid-template-columns: 1fr; }
  .network { grid-template-columns: 1fr; gap: 40px; }
  .network-info { padding-left: 0; }
  .howitworks, .usecases, .network { padding: 80px 20px; }
  .closing { padding: 80px 20px; }
  .section-title { font-size: 30px; }
}