:root {
  --fg: #1a1a1a; --muted: #555; --bg: #fff; --accent: #1d4ed8; --accent-fg: #fff;
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #e8eaf0; --muted: #a0a6b4; --bg: #070b14; --accent: #6b9bff; --accent-fg: #070b14; }
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  max-width: 720px; margin: 0 auto; padding: 48px 16px 64px;
  color: var(--fg); background: var(--bg); line-height: 1.65; font-size: 17px;
}
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 16px; }
h2 { font-size: 1.15rem; margin: 32px 0 6px; }
p { margin: 0 0 12px; }
.lead { font-size: 1.1rem; }
.cta {
  display: inline-block; margin: 8px 0 16px; padding: 12px 20px; border-radius: 10px;
  background: var(--accent); color: var(--accent-fg); text-decoration: none; font-weight: 600;
}
.en { margin-top: 40px; color: var(--muted); font-size: .9rem; }
footer { margin-top: 48px; font-size: .9rem; }
footer a { color: var(--accent); }