:root {
  --ink: #1b2430;
  --muted: #4f5b69;
  --line: #d9dee5;
  --bg: #fbfbf9;
  --panel: #ffffff;
  --accent: #1f4e79;
  --accent-soft: #e8eff6;
  --max: 46rem;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6e9ee;
    --muted: #a9b3bf;
    --line: #2f3945;
    --bg: #12171d;
    --panel: #1a2129;
    --accent: #8cb8e3;
    --accent-soft: #1e2b39;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-wrap: break-word;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  background: var(--panel);
  padding: 0.5rem 0.75rem;
}
.skip-link:focus { left: 0.5rem; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1rem;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.brand {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: bold;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.brand span { color: var(--accent); }
.site-header nav a {
  font-size: 0.95rem;
  color: var(--muted);
}

main { padding: 2.5rem 0 3rem; }

h1, h2, h3 {
  font-family: var(--serif);
  line-height: 1.25;
  font-weight: normal;
}
h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); margin: 0 0 1rem; }
h2 { font-size: 1.5rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.2rem; margin: 0 0 0.35rem; }

.lede { font-size: 1.15rem; color: var(--muted); margin: 0 0 1rem; }

.reviewed {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 2rem;
}

.topics {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.9rem;
}
.topic {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  padding: 1rem 1.1rem;
}
.topic p { margin: 0; color: var(--muted); }

.note {
  background: var(--accent-soft);
  border-radius: 4px;
  padding: 1rem 1.1rem;
  margin-top: 2.5rem;
}
.note p { margin: 0; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  font-size: 0.9rem;
  color: var(--muted);
  padding: 1.75rem 0 2.5rem;
}
.site-footer p { margin: 0 0 0.75rem; }
.site-footer address { font-style: normal; margin-bottom: 0.75rem; }
.site-footer .disclaimer { color: var(--ink); }