:root {
  --bg: #fbfaf7; --text: #1d1d1f; --muted: #5f5f66; --line: #e4e2dc;
  --accent: #e2552b; --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #141416; --text: #f2f2f4; --muted: #a3a3ab; --line: #2c2c31; --accent: #ff7a50; --card: #1c1c1f; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 80px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 40px; }
header a { color: inherit; text-decoration: none; font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.mark { width: 34px; height: 34px; border-radius: 9px; background: var(--accent); display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 15px; }
h1 { font-size: 40px; line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 16px; }
h2 { font-size: 21px; letter-spacing: -0.01em; margin: 40px 0 8px; }
p, li { color: var(--muted); }
strong { color: var(--text); }
a { color: var(--accent); }
ul { padding-left: 20px; }
.lead { font-size: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; margin: 28px 0; }
.card p { margin: 0; }
footer { margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { margin-right: 16px; }