:root {
  --bg: #0f0f10;
  --text: #ececec;
  --muted: #9a9a9e;
  --line: #26262a;
  --accent: #c9f27a;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #fafaf8; --text: #151515; --muted: #66666b; --line: #e3e3e0; --accent: #4d7a00; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 56px 16px 80px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 40px; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header a { color: inherit; text-decoration: none; font-weight: 600; font-size: 20px; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
nav a { color: var(--muted); font-weight: 400; font-size: 14px; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 40px 0 8px; }
h3 { font-size: 16px; margin: 24px 0 4px; }
p, li { color: var(--text); }
.lead { color: var(--muted); font-size: 18px; }
a { color: var(--accent); }
ul { padding-left: 20px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.box { border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; }
footer { margin-top: 64px; color: var(--muted); font-size: 14px; }