:root {
  --bg: #f4fbf8; --card: #ffffff; --text: #2a2233; --muted: #4e6b63; --rule: #d6e9e3;
  --accent: #e5533d; --accent-ink: #ffffff; --link: #b83a28;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #17191f; --card: #22252e; --text: #eceef3; --muted: #a9b8b3; --rule: #313642; --accent: #ef6a55; --link: #ff8f7d; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
header.site { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 32px; }
header.site a.brand { font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; letter-spacing: 0.01em; }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-weight: 600; }
nav a:hover { color: var(--text); }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
p.lead { font-size: 19px; color: var(--muted); margin: 0 0 24px; }
a { color: var(--link); }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 18px; padding: 20px; margin: 16px 0; }
.app { display: flex; gap: 16px; align-items: center; }
.app img { width: 72px; height: 72px; border-radius: 16px; flex-shrink: 0; }
.button { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 12px 18px; border-radius: 12px; font-weight: 700; text-decoration: none; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
dt { font-weight: 700; margin-top: 16px; }
dd { margin: 4px 0 0; color: var(--muted); }