* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fafafa;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header {
  text-align: center;
  padding: 3rem 0;
  border-bottom: 1px solid #eee;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 600;
  color: #222;
  margin-bottom: 0.5rem;
}

header p {
  color: #666;
  font-size: 1.1rem;
}

nav {
  margin-top: 1.5rem;
}

nav a {
  color: #555;
  text-decoration: none;
  margin: 0 1rem;
  font-size: 0.95rem;
}

nav a:hover {
  color: #000;
  text-decoration: underline;
}

main {
  min-height: 50vh;
}

main h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: #222;
}

main h2 {
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
  color: #333;
}

main p {
  margin-bottom: 1rem;
  color: #444;
}

main ul {
  margin: 1rem 0 1rem 1.5rem;
  color: #444;
}

main li {
  margin-bottom: 0.5rem;
}

.update-date {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 3rem;
  border-top: 1px solid #eee;
  color: #888;
  font-size: 0.9rem;
}

footer p {
  margin-bottom: 0.5rem;
}

footer a {
  color: #666;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }

  header {
    padding: 2rem 0;
  }

  header h1 {
    font-size: 1.5rem;
  }

  nav a {
    display: block;
    margin: 0.5rem 0;
  }
}