:root {
  --bg: #f7f8f6;
  --surface: #ffffff;
  --text: #1c2420;
  --muted: #5b6660;
  --brand: #1b6b40;
  --brand-soft: #e3f0e8;
  --border: #dfe4e0;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111513;
    --surface: #181d1a;
    --text: #e6ebe8;
    --muted: #9aa6a0;
    --brand: #5cc28a;
    --brand-soft: #1d2e24;
    --border: #2a322d;
  }
}

* { box-sizing: border-box; }

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

header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--brand);
  text-decoration: none;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.95rem;
}

nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--brand); }

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

main { padding: 32px 0 64px; }

h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }

.meta { color: var(--muted); margin: 0 0 24px; }

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
}

.callout {
  background: var(--brand-soft);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 20px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; }

.table-scroll { overflow-x: auto; }

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

.hero { padding: 24px 0 8px; }
.hero p { font-size: 1.1rem; color: var(--muted); }