:root {
  --bg: #fbfbfa; --surface: #fff; --surface-alt: #f6f5f2; --border: #ececea;
  --text: #141413; --muted: #6b665c; --primary: #c9273a; --primary-hover: #a81f30;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #141413; --surface: #1d1d1b; --surface-alt: #232321; --border: #33322f; --text: #f4f3ef; --muted: #a29d92; --primary: #e0455a; --primary-hover: #ee6477; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.65; font-size: 17px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-underline-offset: 3px; }
a:hover { color: var(--primary-hover); }
.site-header { border-bottom: 1px solid var(--border); background: var(--surface); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { font-weight: 800; letter-spacing: -0.01em; color: var(--text); text-decoration: none; }
nav a { margin-left: 20px; color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 600; }
nav a:hover { color: var(--primary); }
main { padding-top: 48px; padding-bottom: 72px; min-height: 60vh; }
h1 { font-size: clamp(32px, 6vw, 46px); line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 16px; }
h2 { font-size: 24px; letter-spacing: -0.015em; margin: 44px 0 12px; }
h3 { font-size: 18px; margin: 28px 0 8px; }
p, li { color: var(--text); }
.lede { font-size: 20px; color: var(--muted); max-width: 34em; }
.eyebrow { color: var(--primary); font-weight: 800; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 12px; }
.meta { color: var(--muted); font-size: 15px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 22px 24px; margin: 20px 0; }
.card h3 { margin-top: 0; }
.summary { background: var(--surface-alt); border-radius: 16px; padding: 18px 22px; margin: 24px 0; }
.button { display: inline-block; background: var(--primary); color: #fff; padding: 12px 22px; border-radius: 999px; font-weight: 700; text-decoration: none; }
.button:hover { background: var(--primary-hover); color: #fff; }
.button.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 16px 0; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.toc { columns: 2; column-gap: 32px; padding-left: 20px; }
@media (max-width: 560px) { .toc { columns: 1; } nav a { margin-left: 14px; } }
.site-footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
.site-footer p { margin: 4px 0; color: var(--muted); }
.site-footer a { color: var(--muted); }
details { border-bottom: 1px solid var(--border); padding: 14px 0; }
summary { cursor: pointer; font-weight: 700; }
details p { margin: 10px 0 0; }