:root {
  --bg: #ffffff;
  --surface: #f4f9f6;
  --text: #16221c;
  --muted: #57685f;
  --accent: #16a34a;
  --accent-soft: #86efac;
  --border: #dfeae4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1512;
    --surface: #141d19;
    --text: #eaf3ee;
    --muted: #9fb3a9;
    --accent: #34d17a;
    --accent-soft: #1d3b2a;
    --border: #23342c;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  margin-bottom: 40px;
}

.brand-mark {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 20px;
}

.brand-mark .bar {
  width: 5px;
  border-radius: 3px;
  background: var(--accent);
}
.brand-mark .bar:nth-child(1) { height: 8px; }
.brand-mark .bar:nth-child(2) { height: 13px; }
.brand-mark .bar:nth-child(3) { height: 20px; }

.brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
}

h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  text-wrap: balance;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 36px;
}

h2 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 2.4em 0 0.7em;
  padding-top: 0.6em;
  border-top: 1px solid var(--border);
}

h2:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 1.6em;
}

p, li {
  color: var(--text);
  font-size: 0.98rem;
}

p { margin: 0 0 1em; }

ul { padding-left: 1.3em; margin: 0 0 1em; }
li { margin-bottom: 0.4em; }

strong { font-weight: 700; }

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

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 1.2em 0;
}

.nav-links {
  display: flex;
  gap: 18px;
  margin-bottom: 8px;
}
.nav-links a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--muted);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav-links a.active {
  color: var(--text);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

footer {
  margin-top: 3em;
  padding-top: 1.5em;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.index-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin-bottom: 14px;
  transition: border-color 0.15s ease;
}
.index-card:hover { border-color: var(--accent); }
.index-card .title { font-weight: 600; font-size: 1.05rem; margin-bottom: 4px; }
.index-card .desc { color: var(--muted); font-size: 0.9rem; }