:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #0b1b30;
  --muted: #55657a;
  --accent: #1660b0;
  --green: #2fd9a0;
  --border: rgba(11, 27, 48, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07111f;
    --card: #0f1e33;
    --text: #e8eef6;
    --muted: #9fb0c4;
    --accent: #6fb6ff;
    --border: rgba(255, 255, 255, 0.08);
  }
}
* { 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;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 64px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
header img { width: 64px; height: 64px; border-radius: 15px; box-shadow: 0 6px 20px rgba(11, 27, 48, 0.18); }
header a { color: inherit; text-decoration: none; }
.eyebrow { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.lead { color: var(--muted); font-size: 19px; margin-top: 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 20px; padding: 20px 22px; margin: 20px 0; }
a { color: var(--accent); }
ul { padding-left: 22px; }
nav { margin-top: 40px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }