:root {
  color-scheme: light dark;
  --bg: #FAFAF8;
  --ink: #0F1C1E;
  --muted: #5A6B6C;
  --link: #0E7C74;
  --rule: #E2E1DB;
  --card: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1C1E;
    --ink: #ECEFEC;
    --muted: #9FB0AF;
    --link: #4FC7BC;
    --rule: #23383A;
    --card: #142527;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

main {
  max-width: 680px;
  margin: 0 auto;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.2;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.125rem;
  line-height: 1.3;
  margin: 2rem 0 0.5rem;
  letter-spacing: -0.005em;
}

p,
ul {
  margin: 0.75rem 0;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.lede {
  color: var(--muted);
  font-size: 1.0625rem;
}

.meta {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 1rem;
}

nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 2rem 0 0;
}

nav a {
  display: block;
  padding: 0.85rem 1rem;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 10px;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0 1.5rem;
}

footer {
  color: var(--muted);
  font-size: 0.8125rem;
}

.back {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  font-size: 0.9375rem;
}

th,
td {
  text-align: left;
  padding: 0.5rem 0.5rem 0.5rem 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

th {
  font-weight: 600;
}