:root {
  --forest: #113f35;
  --ink: #1c2b27;
  --muted: #5f6f6a;
  --line: #e3e3da;
  --bg: #f5f5f0;
  --card: #ffffff;
  --red: #b70b19;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e7ece9;
    --muted: #a3b1ac;
    --line: #2c3a36;
    --bg: #0f1a17;
    --card: #16231f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, "Segoe UI", Tahoma, sans-serif;
}
header {
  background: var(--forest);
  color: #fff;
  padding: 18px 16px;
}
header .in, main { max-width: 720px; margin: 0 auto; }
header .in { display: flex; align-items: center; gap: 12px; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header b { font-size: 20px; }
main { padding: 16px; }
section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 4px 20px 12px;
  margin-bottom: 14px;
}
h1 { font-size: 22px; margin: 16px 0 4px; }
h2 { font-size: 17px; margin: 18px 0 4px; }
p, li { margin: 6px 0; }
.muted { color: var(--muted); font-size: 14px; }
a { color: inherit; }
nav { display: flex; gap: 16px; flex-wrap: wrap; margin: 8px 0 0; }