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

body {
  font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #333;
  line-height: 1.7;
  background: #f8f9fa;
}

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

header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  padding: 1rem 0;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img { height: 40px; }

nav a {
  color: #0ea5e9;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  margin-left: 1.5rem;
}

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

main {
  background: #fff;
  margin: 2rem auto;
  max-width: 720px;
  padding: 2.5rem 2rem;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

h1 {
  font-size: 1.6rem;
  color: #0ea5e9;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.1rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

p, li { margin-bottom: 0.75rem; }
ol { padding-left: 1.5rem; }
ol li { padding-left: 0.25rem; }

footer {
  text-align: center;
  padding: 2rem 0;
  font-size: 0.85rem;
  color: #9ca3af;
}

footer a { color: #6b7280; }