:root {
  --bg: #0b1220;
  --surface: #111827;
  --surface-2: #1a2436;
  --text: #e5e7eb;
  --muted: #9fb0c8;
  --accent: #67b3ff;
  --accent-2: #b9ddff;
  --border: #2a3b55;
  --success: #99f6e4;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.wrap {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(11, 18, 32, 0.8);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .95rem;
}

.nav a:hover { color: var(--accent-2); }

.hero {
  background:
    radial-gradient(1100px 520px at 80% -20%, rgba(103,179,255,0.25), transparent 70%),
    radial-gradient(900px 420px at -10% 0%, rgba(112, 255, 214, 0.15), transparent 60%),
    linear-gradient(180deg, #0b1220 0%, #111827 100%);
  border-bottom: 1px solid var(--border);
  padding: 62px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 20px;
}

.eyebrow {
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  margin: 0 0 10px;
}

h1 { margin: 0 0 10px; line-height: 1.2; }
h2 { margin-top: 0; }
h3 { margin-top: 0; }

.lead { color: var(--muted); max-width: 70ch; }

.hero-panel {
  background: rgba(26, 36, 54, 0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}

.hero-panel ul { margin: 0; padding-left: 1.2rem; }

.cta-row { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #0b1220;
  text-decoration: none;
  font-weight: 600;
  padding: 10px 14px;
  border-radius: 8px;
}
.btn-secondary {
  background: transparent;
  color: var(--accent-2);
  border: 1px solid var(--accent);
}
.btn:hover { filter: brightness(1.06); }

.section { padding: 52px 0; }
.section.alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.stack { display: grid; gap: 14px; }

.card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, .18);
}

.steps { padding-left: 1.2rem; }
.glossary {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.muted { color: var(--muted); }
code {
  background: #0b1220;
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 6px;
}

.footer {
  padding: 28px 0 38px;
  color: var(--muted);
}

a { color: var(--accent-2); }

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.screenshot-placeholder {
  min-height: 160px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border-style: dashed;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .topbar-inner {
    min-height: auto;
    padding: 10px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}