body {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 96px;
  font: 15px/1.7 system-ui, -apple-system, sans-serif;
  color: #1a1a1a;
  background: #fff;
}
h1 {
  font-size: 1.6rem;
  margin: 0 0 0.4rem;
}
h2 {
  font-size: 1.1rem;
  margin: 2.2rem 0 0.4rem;
}
p,
li {
  margin: 0.5rem 0;
}
a {
  color: #2b4de0;
}
.updated {
  color: #666;
  font-size: 0.9rem;
  margin-top: 0;
}
.todo {
  background: #fff4e0;
  border: 1px solid #e0b163;
  border-radius: 6px;
  padding: 10px 14px;
  margin: 10px 0;
  font-size: 0.9rem;
}
.todo strong {
  color: #8a5a12;
}
.back {
  display: inline-block;
  margin-bottom: 28px;
  font-size: 0.9rem;
}
footer {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid #e5e5e5;
  font-size: 0.85rem;
  color: #666;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #131418;
    color: #eaebef;
  }
  a {
    color: #829dff;
  }
  .todo {
    background: #2a2410;
    border-color: #6b5a2a;
  }
  .todo strong {
    color: #e0b163;
  }
  footer {
    border-color: #2c2e35;
  }
}