:root {
  --bg: #fcfcfd;
  --surface: #f4f6f8;
  --ink: #171a1f;
  --muted: #5a6572;
  --border: #e2e6ea;
  --accent: #2d5b87;
  --accent-dark: #244a6e;
  --maxw: 44rem;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Archivo', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }

header.site { border-bottom: 1px solid var(--border); }
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand svg { display: block; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}
nav a:hover { color: var(--ink); }

main { padding: 3.5rem 0 4rem; }

h1 {
  font-size: 2.15rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.lede {
  font-size: 1.2rem;
  color: var(--muted);
  margin: 0 0 2.5rem;
  max-width: 34rem;
}

h2 {
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.75rem;
}

p { margin: 0 0 1rem; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--accent-dark); }

.rows { border-top: 1px solid var(--border); margin: 2rem 0; }
.rows > div {
  border-bottom: 1px solid var(--border);
  padding: 1.1rem 0;
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 1rem;
}
.rows .k { font-weight: 600; }
.rows .v { color: var(--muted); }

@media (max-width: 34rem) {
  .rows > div { grid-template-columns: 1fr; gap: 0.25rem; }
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  color: var(--muted);
  font-size: 0.97rem;
  margin: 2rem 0;
}

.eff { color: var(--muted); font-size: 0.95rem; margin: -0.25rem 0 2rem; }

ul.plain { margin: 0 0 1rem; padding-left: 1.2rem; }
ul.plain li { margin: 0.35rem 0; }

.back { display: inline-block; margin-bottom: 1.5rem; font-size: 0.95rem; }

footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
footer.site .wrap {
  padding: 2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--ink); }