:root {
  --accent: #208aef;
  --ink: #16181d;
  --muted: #60646c;
  --paper: #ffffff;
  --border: #e6e8eb;
  --card: #f7f9fb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  line-height: 1.55;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

header {
  margin-bottom: 32px;
}

h1 {
  font-size: 28px;
  margin: 0 0 8px;
}

h2 {
  font-size: 18px;
  margin: 32px 0 8px;
}

p {
  margin: 0 0 16px;
  color: var(--ink);
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

a {
  color: var(--accent);
}

ul,
ol {
  padding-left: 20px;
  margin: 0 0 16px;
}

li {
  margin-bottom: 6px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.card ul,
.card ol {
  margin-bottom: 0;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 16px;
  font-size: 14px;
}