:root {
  --accent: #5B8DEF;
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --ink: #12151B;
  --muted: #5A6270;
  --line: #E3E6EB;
  --radius: 20px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--brand-bg, #0E1116);
    --surface: var(--brand-surface, #171B22);
    --ink: var(--brand-ink, #F2F4F8);
    --muted: #9AA3B2;
    --line: #262C36;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
header.site { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
header.site a.brand { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 20px; }
nav a { margin-left: 16px; color: var(--muted); text-decoration: none; font-size: 15px; }
section { padding: 48px 0; border-top: 1px solid var(--line); }
section:first-of-type { border-top: 0; }
h1 { font-size: clamp(34px, 7vw, 56px); line-height: 1.1; margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 5vw, 36px); margin: 0 0 20px; letter-spacing: -0.01em; }
h3 { font-size: 19px; margin: 0 0 6px; }
.lead { font-size: 20px; color: var(--muted); margin: 0 0 28px; }
.hero { padding: 64px 0 56px; text-align: center; }
.badge {
  display: inline-block; padding: 14px 24px; border-radius: 999px;
  background: var(--ink); color: var(--bg); text-decoration: none; font-weight: 600;
}
.grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .grid.cols-2 { grid-template-columns: 1fr 1fr; } .grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card p { margin: 0; color: var(--muted); }
.price { font-size: 32px; font-weight: 700; margin: 8px 0; }
.card.featured { border-color: var(--accent); }
.note { font-size: 14px; color: var(--muted); }
details { border-bottom: 1px solid var(--line); padding: 14px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 8px 0 0; }
footer.site { padding: 32px 0 48px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
footer.site a { color: var(--muted); margin-right: 16px; }
.prose { max-width: 720px; }
.prose h2 { font-size: 22px; margin-top: 32px; }