:root {
  --bg: #ffffff;
  --text: #1c1d22;
  --muted: #5d6170;
  --line: #e4e6ec;
  --card: #f6f7fa;
  --accent: #0b74d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --text: #e9eaee;
    --muted: #a3a7b3;
    --line: #2a2d35;
    --card: #1a1d23;
    --accent: #5aa9ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
header a.brand { color: var(--text); font-weight: 700; font-size: 1.15rem; text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }
nav a:hover { color: var(--text); }
h1 { font-size: 2rem; line-height: 1.2; margin: 40px 0 12px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
p, li { color: var(--text); }
.lead { color: var(--muted); font-size: 1.1rem; }
a { color: var(--accent); }
.app { display: flex; gap: 16px; align-items: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin-top: 24px; }
.app img { width: 64px; height: 64px; border-radius: 14px; flex: none; }
.app h2 { margin: 0 0 4px; }
.app p { margin: 0 0 10px; color: var(--muted); }
.btn { display: inline-block; background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.links a { margin-right: 14px; }
footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.muted { color: var(--muted); }