* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f5f5f5;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  background: #fff;
  min-height: 100vh;
}

@media (min-width: 640px) {
  .page {
    padding: 3rem 2rem;
    margin: 2rem auto;
    min-height: auto;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  }
}

header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #e5e5e5;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 700;
}

.updated {
  margin: 0;
  font-size: 0.875rem;
  color: #666;
}

main section {
  margin-bottom: 1.75rem;
}

h2 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
}

p, ul {
  margin: 0 0 0.75rem;
}

ul {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.35rem;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid #e5e5e5;
  font-size: 0.875rem;
  color: #666;
}

footer a {
  color: #666;
}

footer a:hover {
  color: #2563eb;
}