*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0;
  padding: 0;
  background: #fff;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

nav {
  background: #111;
  padding: 1rem 0;
}

nav .container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-size: 0.95rem;
}

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

nav a:first-child {
  font-weight: 700;
  font-size: 1.1rem;
  margin-right: auto;
}

main {
  padding: 2rem 0;
}

h1 {
  font-size: 2rem;
  color: #111;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.35rem;
  color: #111;
  margin: 2rem 0 0.75rem;
}

h3 {
  font-size: 1.1rem;
  color: #111;
}

p, ul, ol {
  margin: 0 0 1rem;
}

a {
  color: #0066cc;
}

a:hover {
  color: #004499;
}

section {
  margin-bottom: 2rem;
}

footer {
  border-top: 1px solid #ddd;
  margin-top: 2rem;
  padding: 1.5rem 0;
  font-size: 0.875rem;
  color: #666;
}

footer a {
  color: #666;
}

footer a:hover {
  color: #333;
}

footer .links {
  margin-top: 0.5rem;
}

footer .links a {
  margin-right: 1rem;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.15rem;
  }

  .container {
    padding: 0 1rem;
  }
}