:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5b6270;
  --border: #dde1e7;
  --accent: #2f5fd6;
  --card: #f6f7f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #eceef2;
    --muted: #9aa1ad;
    --border: #2b2f37;
    --accent: #7ea2ff;
    --card: #1c1f25;
  }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); }
main, .site-header nav, .site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}
.site-header { border-bottom: 1px solid var(--border); }
.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}
.brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--fg); }
.brand span { color: var(--accent); }
.links a { margin-left: 18px; text-decoration: none; color: var(--fg); }
.links a:hover { color: var(--accent); }
main { padding-top: 28px; padding-bottom: 40px; }
.hero h1 { font-size: 1.8rem; margin-bottom: 8px; }
.hero p { color: var(--muted); max-width: 62ch; }
h1 { font-size: 1.6rem; margin: 12px 0 8px; }
h2 { font-size: 1.2rem; margin: 28px 0 10px; }
.lede { color: var(--muted); max-width: 62ch; }
.crumbs { color: var(--muted); font-size: 0.9rem; margin-top: 8px; }
.crumbs a { color: var(--muted); }
.product { margin-top: 24px; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.product-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px; }
.product-head h2 { margin: 0; }
.src { color: var(--muted); font-size: 0.85rem; }
.stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: 16px 0;
}
.stat {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--bg);
}
.stat .label { display: block; font-size: 0.75rem; color: var(--muted); margin-bottom: 4px; }
.stat strong { font-size: 1.1rem; }
.disclaimer { color: var(--muted); font-size: 0.82rem; margin: 10px 0 16px; }
table.history {
  display: block;
  overflow-x: auto;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
table.history th, table.history td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.history th { color: var(--muted); font-weight: 600; font-size: 0.8rem; }
.nowrap { white-space: nowrap; }
.more { display: inline-block; margin-top: 12px; }
.faq { margin-top: 32px; }
.faq details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 8px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 10px 0 2px; }
.cross { margin-top: 28px; color: var(--muted); }
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; }
.site-footer p { color: var(--muted); font-size: 0.82rem; }
@media (max-width: 640px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
}