:root {
  --bg: #070b12;
  --panel: #101826;
  --border: #1c2a3d;
  --text: #e8eef8;
  --muted: #8b9cb3;
  --accent: #3d9cf0;
  --ok: #34d399;
  --llm: #a78bfa;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background:
    radial-gradient(900px 500px at 15% -10%, #15263f 0%, transparent 55%),
    radial-gradient(700px 400px at 90% 10%, #1a1430 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
.brand {
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}
.nav-links {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}
.nav-links a { color: var(--muted); font-size: 0.92rem; }
.nav-links a:hover { color: var(--text); }

.hero {
  border-bottom: 1px solid var(--border);
  padding-bottom: 2.5rem;
}
.hero-body {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0.5rem;
}
.eyebrow {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  margin: 0 0 0.75rem;
}
h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}
.lead {
  font-size: 1.1rem;
  color: #c5d0e0;
  max-width: 48rem;
  margin: 0 0 1.5rem;
}
.lead strong { color: var(--text); }

.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: linear-gradient(135deg, #2563eb, #3d9cf0); border-color: transparent; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.85rem; }

.live-badges { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.pill {
  font-size: 0.78rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
}
.pill.on { color: var(--ok); border-color: #1f3d32; }
.pill.llm { color: var(--llm); border-color: #3b2f5c; }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}
section { margin-bottom: 2.75rem; }
h2 {
  font-size: 1.35rem;
  margin: 0 0 0.85rem;
  letter-spacing: -0.01em;
}
.muted { color: var(--muted); font-size: 0.92rem; }
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: #0d1420;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: -1rem 0 2.5rem;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}
.card .label {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.card .value {
  font-size: 1.45rem;
  font-weight: 700;
  margin-top: 0.2rem;
}
.card .value.small { font-size: 0.95rem; font-weight: 600; }

.checklist {
  padding-left: 1.2rem;
  color: #c5d0e0;
}
.checklist li { margin: 0.4rem 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
}
.feature {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}
.feature h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}
.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.diagram, .code {
  background: #0a101a;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
  color: #b8c7db;
}
.code code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.tabs { display: flex; gap: 0.4rem; margin-bottom: 0.75rem; }
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
}
.tab.active {
  color: var(--text);
  background: var(--panel);
  border-color: var(--border);
}
.panel { display: none; }
.panel.active { display: block; }

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--border);
}
.timeline li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.1rem;
  border-bottom: 1px solid var(--border);
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 1.1rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.timeline .when {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  margin-bottom: 0.15rem;
}
.timeline a { color: var(--text); font-weight: 600; }
.timeline .msg { color: var(--muted); font-size: 0.9rem; }

.roadmap {
  color: #c5d0e0;
  padding-left: 1.2rem;
}
.roadmap li { margin: 0.5rem 0; }

footer {
  border-top: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 800px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .nav-links a:not(.btn) { display: none; }
}