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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  background: #f5f5f5;
  color: #1a1a2e;
  line-height: 1.6;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  background: linear-gradient(135deg, #4a6cf7, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  margin-top: 0.5rem;
  color: #555;
  font-size: 1.1rem;
}

section {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: #1a1a2e;
}

h3 {
  font-size: 1rem;
  margin: 1rem 0 0.5rem;
  color: #333;
}

ul {
  list-style: disc;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

pre {
  background: #1a1a2e;
  color: #e0e0e0;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.9rem;
  margin: 0.5rem 0;
}

code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
}

a {
  color: #4a6cf7;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding-top: 1rem;
  color: #888;
  font-size: 0.85rem;
}