:root {
  --bg: #F8FAFC;
  --text: #0F172A;
  --muted: #55647A;
  --accent: #2563EB;
  --border: #E2E8F0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 56px; }
nav { display: flex; flex-wrap: wrap; gap: 8px 20px; padding-bottom: 16px; margin-bottom: 28px; border-bottom: 1px solid var(--border); font-size: 15px; }
nav strong { margin-right: auto; }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.5px; margin: 0 0 8px; }
h2 { font-size: 19px; line-height: 1.3; margin: 32px 0 8px; }
h3 { font-size: 16px; line-height: 1.4; margin: 20px 0 4px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 14px; }
.store { margin-top: 24px; }
.store a { display: inline-block; }
.store img { display: block; height: 48px; width: auto; }