:root {
  color-scheme: light dark;
  --fg: #1d1d1f;
  --bg: #fff;
  --muted: #5c5c61;
  --accent: #0a5fd8;
  --card: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f5f5f7;
    --bg: #1d1d1f;
    --muted: #a1a1a6;
    --accent: #6cb0ff;
    --card: #2a2a2d;
  }
}
body {
  font:
    18px/1.6 -apple-system,
    system-ui,
    sans-serif;
  margin: 0;
  color: var(--fg);
  background: var(--bg);
}
header,
main,
footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1rem;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  font-size: 0.9rem;
}
header a {
  text-decoration: none;
}
h1 {
  font-size: 2.2rem;
  line-height: 1.2;
  margin: 2.5rem 0 1rem;
}
h2 {
  font-size: 1.4rem;
  margin: 2.5rem 0 0.5rem;
}
h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.25rem;
}
a {
  color: var(--accent);
}
.lead {
  font-size: 1.15rem;
  color: var(--muted);
}
.button {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  background: #0a5fd8;
  color: #fff;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
}
.note {
  font-size: 0.9rem;
  color: var(--muted);
}
ul {
  padding-left: 1.2rem;
}
li {
  margin: 0.4rem 0;
}
.card {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}
footer {
  margin-top: 3rem;
  padding-bottom: 3rem;
  font-size: 0.9rem;
  color: var(--muted);
}
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.95rem;
}
th,
td {
  text-align: left;
  vertical-align: top;
  padding: 0.5rem 0.75rem 0.5rem 0;
  border-bottom: 1px solid var(--card);
}