:root {
  --bg: #f3f6f2;
  --fg: #141c16;
  --text: #2b362e;
  --muted: #5c6a60;
  --accent: #3e7a4a;
  --card: #fafcf9;
  --line: #dfe6e0;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101612;
    --fg: #f1f5f2;
    --text: #d3ddd6;
    --muted: #93a39a;
    --accent: #8fd88a;
    --card: #18201c;
    --line: #2a332e;
  }
}
:root[data-theme="dark"] {
  --bg: #101612;
  --fg: #f1f5f2;
  --text: #d3ddd6;
  --muted: #93a39a;
  --accent: #8fd88a;
  --card: #18201c;
  --line: #2a332e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
nav a { color: var(--muted); margin-left: 16px; text-decoration: none; }
a { color: var(--accent); overflow-wrap: anywhere; }
h1, h2 { color: var(--fg); }
h1 { font-size: 34px; line-height: 1.2; margin: 40px 0 12px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 18px; color: var(--fg); margin: 24px 0 4px; }
.lead { font-size: 19px; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; margin: 24px 0; }
ul, ol { padding-left: 22px; }
li { margin: 6px 0; }
.sources li { font-size: 15px; }
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; }
footer a { color: var(--muted); margin-right: 16px; }