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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid #e5e5e5;
  margin-bottom: 2rem;
}

header nav .logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: #1a1a1a;
  text-decoration: none;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

header nav ul a {
  color: #555;
  text-decoration: none;
  font-size: 0.9rem;
}

header nav ul a:hover {
  color: #1a1a1a;
}

main {
  flex: 1;
}

main h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

main h2 {
  font-size: 1.3rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

main p {
  margin-bottom: 1rem;
  color: #333;
}

main ul {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

main ul li {
  margin-bottom: 0.25rem;
  color: #333;
}

main a {
  color: #0066cc;
  text-decoration: none;
}

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

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e5e5e5;
  font-size: 0.85rem;
  color: #888;
}

footer p {
  margin-bottom: 0.25rem;
  color: #888;
}

footer a {
  color: #888;
  text-decoration: none;
}

footer a:hover {
  color: #555;
}