:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-soft: #111936;
  --panel: rgba(18, 27, 58, 0.82);
  --panel-strong: rgba(28, 41, 86, 0.94);
  --text: #edf3ff;
  --muted: #9eb2d9;
  --line: rgba(158, 178, 217, 0.22);
  --accent: #7ce7ff;
  --accent-2: #c099ff;
  --accent-3: #75f0a6;
  --warn: #ffd166;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 231, 255, 0.22), transparent 34rem),
    radial-gradient(circle at top right, rgba(192, 153, 255, 0.20), transparent 30rem),
    linear-gradient(135deg, #080d1b 0%, #111936 48%, #0a1226 100%);
}

a { color: inherit; }
code { color: #c9f7ff; }
pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1rem;
  background: rgba(3, 8, 18, 0.72);
  line-height: 1.55;
}

.shell { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.hero { padding: 1.2rem 0 4rem; }
.subhero { padding: 1.2rem 0 2.4rem; }
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0 2.5rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none; font-weight: 800; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.8rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #061020;
  box-shadow: 0 0 34px rgba(124, 231, 255, 0.32);
}
.nav-links { display: flex; flex-wrap: wrap; gap: 0.55rem; justify-content: flex-end; }
.nav-links a {
  padding: 0.55rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.06);
}
.hero-grid { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 2rem; align-items: center; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; font-weight: 800; }
h1 { margin: 0.25rem 0 1rem; font-size: clamp(2.25rem, 7vw, 5.4rem); line-height: 0.94; letter-spacing: -0.06em; }
h2 { margin: 0 0 0.75rem; font-size: clamp(1.4rem, 3vw, 2.2rem); letter-spacing: -0.03em; }
h3 { margin: 0 0 0.5rem; }
.lede { color: var(--muted); font-size: clamp(1rem, 2vw, 1.28rem); line-height: 1.65; max-width: 68ch; }
.small { color: var(--muted); font-size: 0.88rem; line-height: 1.55; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.6rem; }
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 2.8rem;
  padding: 0 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 800;
}
.button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #061020; border: 0; }
.button.ghost { background: rgba(255, 255, 255, 0.06); }
.panel,
.signal-card,
.feature-card,
.mini-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}
.panel { padding: clamp(1rem, 2vw, 1.6rem); margin-bottom: 1.2rem; }
.signal-card { padding: 1.4rem; position: relative; }
.status-dot {
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 0 rgba(117, 240, 166, 0.6);
  animation: pulse 1.8s infinite;
}
.signal-card dl { display: grid; gap: 0.8rem; }
.signal-card div { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); padding-bottom: 0.65rem; }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 800; text-align: right; }
.card-grid { display: grid; gap: 1rem; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.feature-card,
.mini-card { padding: 1.2rem; text-decoration: none; transition: transform 160ms ease, border-color 160ms ease; }
.feature-card:hover { transform: translateY(-4px); border-color: rgba(124, 231, 255, 0.7); }
.feature-card p,
.mini-card p { color: var(--muted); line-height: 1.55; }
.icon { font-size: 2rem; color: var(--accent); }
.split-section,
.demo-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; align-items: stretch; }
.checklist ul { padding-left: 1.2rem; line-height: 1.8; color: var(--muted); }
.footer { color: var(--muted); padding: 2rem 0 3rem; }
.panel-title { color: var(--accent); font-weight: 900; margin-bottom: 0.8rem; }
.finding-list { display: grid; gap: 0.9rem; padding-left: 1.2rem; line-height: 1.6; color: var(--muted); }
.timeline { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.timeline div { border: 1px solid var(--line); border-radius: 20px; padding: 1rem; background: rgba(255, 255, 255, 0.04); }
.timeline span { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; background: var(--accent); color: #061020; font-weight: 900; }
.timeline p { color: var(--muted); line-height: 1.5; }
.swarm-board { display: grid; gap: 1rem; justify-items: center; }
.swarm-branches { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.swarm-node {
  width: 100%;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel-strong);
  text-align: center;
}
.swarm-node span { display: block; font-size: 1.25rem; font-weight: 900; }
.swarm-node p { color: var(--muted); }
.swarm-node.lead,
.swarm-node.synth { width: min(520px, 100%); border-color: rgba(124, 231, 255, 0.48); }
.warning-card { border-color: rgba(255, 209, 102, 0.42); }
.flow-card { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: center; justify-content: center; }
.flow-step { min-width: 180px; padding: 1rem; border-radius: 20px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.045); }
.flow-step span { font-weight: 900; }
.flow-step p { color: var(--muted); margin-bottom: 0; }
.flow-step.active { border-color: rgba(117, 240, 166, 0.58); }
.flow-step.amber { border-color: rgba(255, 209, 102, 0.58); }
.flow-arrow { color: var(--accent); font-size: 1.4rem; }
.prompt-card blockquote { margin: 0; padding: 1rem; border-left: 4px solid var(--accent); color: var(--text); font-size: 1.15rem; line-height: 1.6; background: rgba(255, 255, 255, 0.05); border-radius: 14px; }
.idea-list { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.idea-list button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 0.7rem 1rem;
  cursor: pointer;
}
.idea-list button:hover { border-color: var(--accent); }
.idea-output { min-height: 2rem; color: var(--accent-3); font-weight: 800; }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(117, 240, 166, 0.6); }
  70% { box-shadow: 0 0 0 12px rgba(117, 240, 166, 0); }
  100% { box-shadow: 0 0 0 0 rgba(117, 240, 166, 0); }
}

@media (max-width: 860px) {
  .top-nav { align-items: flex-start; flex-direction: column; }
  .hero-grid,
  .split-section,
  .demo-layout,
  .swarm-branches,
  .timeline,
  .card-grid.four,
  .card-grid.three { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.2rem, 14vw, 4rem); }
}