/* Ratiora — public site. Self-contained: no external fonts, scripts, or
   requests of any kind. Light and dark follow the visitor's system setting. */
:root {
  --bg: #fbfaf7;
  --fg: #1c1b18;
  --muted: #5d5a52;
  --rule: #e4e0d6;
  --accent: #1f4e79;
  --accent-soft: #e8eff6;
  --max: 42rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15161a;
    --fg: #ece9e1;
    --muted: #a39f95;
    --rule: #2b2d33;
    --accent: #8ab4dd;
    --accent-soft: #1d2a38;
  }
}
* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font:
    17px / 1.6 ui-serif,
    Georgia,
    "Times New Roman",
    serif;
}
a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
header,
main,
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}
header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}
.brand {
  font:
    600 1.15rem / 1 ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  letter-spacing: 0.02em;
  color: var(--fg);
  text-decoration: none;
}
nav a {
  margin-left: 1.25rem;
  font:
    0.95rem ui-sans-serif,
    system-ui,
    sans-serif;
}
main {
  padding-top: 3rem;
  padding-bottom: 4rem;
}
h1 {
  font:
    600 clamp(1.9rem, 4vw, 2.6rem) / 1.15 ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}
h2 {
  font:
    600 1.05rem / 1.3 ui-sans-serif,
    system-ui,
    sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 2.75rem 0 0.75rem;
}
p {
  margin: 0 0 1rem;
}
.lede {
  font-size: 1.2rem;
  color: var(--muted);
}
.pill {
  display: inline-block;
  font:
    600 0.8rem / 1 ui-sans-serif,
    system-ui,
    sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
ul {
  padding-left: 1.2rem;
}
li {
  margin-bottom: 0.5rem;
}
dl {
  margin: 0;
}
dt {
  font-weight: 600;
  font-family: ui-sans-serif, system-ui, sans-serif;
}
dd {
  margin: 0 0 1rem;
  color: var(--muted);
}
footer {
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
  padding-bottom: 3rem;
  font:
    0.9rem ui-sans-serif,
    system-ui,
    sans-serif;
  color: var(--muted);
}
footer a {
  margin-right: 1.25rem;
}