:root {
  --bg: #0a0f0c;
  --bg-card: #0f1712;
  --bg-card-hover: #131f18;
  --border: #1d2b22;
  --border-light: #28392f;
  --green: #34d399;
  --green-bright: #4ade80;
  --green-dim: #1a3328;
  --text: #e8ede9;
  --text-dim: #8fa396;
  --text-faint: #5a6b60;
  --blue: #60a5fa;
  --orange: #fb923c;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Background ambient ---------- */
.ambient-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(52,211,153,0.10) 0%, rgba(52,211,153,0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,15,12,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.navbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--green-dim);
  display: flex; align-items: center; justify-content: center;
  color: var(--green-bright);
}
.brand-text .name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
}
.brand-text .tagline {
  font-size: 10px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav-links { display: flex; gap: 36px; }
.nav-links a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.btn-login {
  border: 1px solid var(--green);
  color: var(--green-bright);
  padding: 9px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
}
.btn-login:hover { background: var(--green-dim); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  z-index: 1;
  padding: 96px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-bright);
  background: var(--green-dim);
  border: 1px solid var(--border-light);
  padding: 7px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green-bright);
  box-shadow: 0 0 8px var(--green-bright);
}
.hero h1 {
  font-family: var(--font-display);
  font-size: 46px;
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 22px;
}
.hero h1 .accent { color: var(--green-bright); }
.hero p {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--green-bright);
  color: #06140d;
  font-weight: 600;
  font-size: 14px;
  padding: 13px 22px;
  border-radius: 9px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(74,222,128,0.25); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-light);
  color: var(--text);
  font-weight: 500;
  font-size: 14px;
  padding: 13px 22px;
  border-radius: 9px;
  transition: border-color 0.2s, background 0.2s;
}
.btn-secondary:hover { border-color: var(--green); background: var(--bg-card-hover); }

/* ---------- Broker preview card ---------- */
.broker-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.broker-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}
.live-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green-bright);
  font-weight: 600;
}
.live-dot::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green-bright);
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(74,222,128,0.5); }
  50% { opacity: 0.6; }
}
.broker-body {
  padding: 20px 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.85;
  color: #cdd9d2;
}
.broker-body .topic-line { color: var(--text-faint); margin-bottom: 10px; }
.broker-body .key { color: var(--blue); }
.broker-body .str { color: #f0d27a; }
.broker-body .num { color: var(--green-bright); }
.broker-body .num.neg { color: var(--orange); }
.broker-body .brace { color: var(--text-faint); }

/* ---------- Section heading ---------- */
.section-label {
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 10px;
}
.section-title {
  text-align: center;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 48px;
}
.section-title.left { text-align: left; }
.section-label.left { text-align: left; }

/* ---------- Spec section ---------- */
.spec-section { padding: 90px 0; position: relative; z-index: 1; }
.spec-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: center;
}
.spec-images { display: flex; gap: 16px; }
.spec-img-card {
  flex: 1;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: var(--bg-card);
}
.spec-img-card img { width: 100%; height: 220px; object-fit: cover; display: block; }
.spec-img-cap {
  padding: 10px 12px;
  font-size: 11px;
  color: var(--text-faint);
  display: flex; align-items: center; gap: 6px;
}
.spec-text p {
  color: var(--text-dim);
  font-size: 14.5px;
  margin: 16px 0 24px;
}
.spec-feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.feature-card .ic {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--green-dim);
  display: flex; align-items: center; justify-content: center;
  color: var(--green-bright);
  margin-bottom: 12px;
}
.feature-card h4 { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.feature-card p { font-size: 12.5px; color: var(--text-faint); margin: 0; }

/* ---------- Params grid ---------- */
.params-section { padding: 60px 0 90px; position: relative; z-index: 1; }
.params-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.param-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  transition: border-color 0.2s, transform 0.2s;
}
.param-card:hover { border-color: var(--border-light); transform: translateY(-2px); }
.param-card .ic { font-size: 22px; margin-bottom: 14px; display: block; }
.param-card h4 { font-size: 14.5px; font-weight: 600; margin-bottom: 6px; }
.param-card p { font-size: 12.5px; color: var(--text-faint); margin: 0; }

/* ---------- Dashboard ---------- */
.dash-section {
  padding: 70px 0 100px;
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
}
.dash-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}
.dash-head .left .tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 8px;
}
.dash-head h2 { font-family: var(--font-display); font-size: 26px; font-weight: 600; }
.last-updated {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
  border: 1px solid var(--border-light);
  padding: 8px 14px;
  border-radius: 100px;
  background: var(--bg-card);
}
.conn-status {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
}
.conn-status::before {
  content: "";
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-faint);
}
.conn-status.connected::before { background: var(--green-bright); box-shadow: 0 0 6px var(--green-bright); }
.conn-status.error::before { background: #f87171; }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin-bottom: 36px;
}
.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 16px;
}
.metric-card .label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}
.metric-card .value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  color: var(--text);
}
.metric-card .value .unit { font-size: 13px; color: var(--text-dim); font-weight: 500; margin-left: 2px; }
.metric-card .value.stale { color: var(--orange); }
.metric-card .delta {
  display: flex; align-items: center; gap: 5px;
  font-size: 11px; color: var(--green-bright); margin-top: 8px;
}
.metric-card .delta.flat { color: var(--text-faint); }

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}
.chart-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 13.5px; font-weight: 600;
  margin-bottom: 18px;
  color: var(--text-dim);
}
.chart-legend { display: flex; gap: 18px; margin-bottom: 14px; }
.chart-legend .item { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--text-dim); }
.chart-legend .dot { width: 8px; height: 8px; border-radius: 2px; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  position: relative; z-index: 1;
}
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; }
.footer-top .ft-name { font-family: var(--font-display); font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.footer-top .ft-sub { font-size: 12.5px; color: var(--text-faint); }
.footer-top .ft-proto { font-size: 11.5px; color: var(--text-faint); text-align: right; }
.footer-bottom { font-size: 11.5px; color: var(--text-faint); border-top: 1px solid var(--border); padding-top: 18px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .spec-grid { grid-template-columns: 1fr; }
  .params-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .hero h1 { font-size: 34px; }
  .footer-top { flex-direction: column; gap: 12px; }
  .footer-top .ft-proto { text-align: left; }
}
@media (max-width: 560px) {
  .params-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .spec-images { flex-direction: column; }
  .hero-actions { flex-direction: column; }
}