:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1c2330;
  --muted: #667085;
  --border: #dde1e8;
  --accent: #2f6fdb;
  --accent-text: #ffffff;
  --accent-soft: #e8f0fd;
  --code-bg: #10151f;
  --code-text: #e6e9ef;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --card: #1b2029;
    --text: #e6e9ef;
    --muted: #98a2b3;
    --border: #2e3542;
    --accent: #5b91ec;
    --accent-text: #0d1117;
    --accent-soft: #1f2d45;
    --code-bg: #0b0f16;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--accent); }
code { font: 0.92em/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 18px 16px;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.top nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover { color: var(--text); }
.top nav .nav-app { color: var(--accent); font-weight: 600; }

main { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

section { margin: 56px 0; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); line-height: 1.12; letter-spacing: -0.02em; margin: 8px 0 18px; max-width: 18ch; }
h2 { font-size: 1.6rem; letter-spacing: -0.01em; margin: 0 0 20px; }
h3 { margin: 0 0 8px; }

.hero { margin-top: 40px; }
.eyebrow { color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.8rem; margin: 0; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; margin: 0; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

.button {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--accent);
}
.button.secondary { background: transparent; color: var(--accent); }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat .value { font-size: 1.8rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .label { color: var(--muted); font-size: 0.9rem; }

.flow { width: 100%; height: auto; max-width: 760px; display: block; margin: 0 auto 28px; }
.flow .node { fill: var(--card); stroke: var(--border); stroke-width: 1.5; }
.flow .node.accent { fill: var(--accent-soft); stroke: var(--accent); }
.flow .node-title { text-anchor: middle; font-weight: 700; font-size: 15px; fill: var(--text); }
.flow .node-sub { text-anchor: middle; font-size: 12px; fill: var(--muted); }
.flow .edge { stroke: var(--accent); stroke-width: 1.8; fill: none; }
.flow .edge.muted { stroke: var(--muted); stroke-dasharray: 5 4; }
.flow .arrowhead { fill: var(--muted); }
.flow .edge-label { font-size: 12px; fill: var(--muted); }

.steps { padding-left: 1.3em; max-width: 72ch; }
.steps li { margin-bottom: 12px; }

.audiences { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card p { margin: 0; color: var(--muted); }

.try pre {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius);
  padding: 18px;
  overflow-x: auto;
  font-size: 0.9rem;
}
.try .c { color: #8b97a8; }
.try pre .u { color: #9cc3ff; }
.hint { color: var(--muted); font-size: 0.95rem; }

footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px 16px 40px;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
  .top { flex-direction: column; align-items: flex-start; }
  section { margin: 40px 0; }
}