:root {
      --primary-color: #2c3e50;
      --accent-color: #3498db;
      --bg-color: #ecf0f1;
      --card-bg: #ffffff;
      --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    body {
      margin: 0;
      font-family: var(--font-family);
      background-color: var(--bg-color);
      color: var(--primary-color);
    }
    header {
      background-color: var(--primary-color);
      color: white;
      padding: 2rem 1rem;
      text-align: center;
    }
    header h1 {
      margin: 0;
      font-size: 2rem;
    }
    header p {
      margin: 0.5rem 0 0;
      font-size: 1.2rem;
    }
    main {
      padding: 2rem 1rem;
      max-width: 800px;
      margin: 0 auto;
    }
    footer {
      text-align: center;
      padding: 1.5rem 1rem;
      font-size: 0.9rem;
      color: #777;
    }
    footer a {
      color: var(--accent-color);
      text-decoration: none;
    }
    section {
      margin-bottom: 2.5rem;
    }
    section h2 {
      color: var(--primary-color);
      border-bottom: 2px solid var(--accent-color);
      padding-bottom: 0.5rem;
      margin-bottom: 1rem;
    }
    section h3 {
      color: var(--primary-color);
      margin-top: 1.5rem;
      margin-bottom: 0.75rem;
    }
    ul {
      line-height: 1.8;
    }
    ol {
      line-height: 1.8;
    }
    code {
      background: #e8eaed;
      padding: 0.2rem 0.4rem;
      border-radius: 3px;
      font-family: 'Courier New', monospace;
      font-size: 0.9rem;
    }
    a {
      color: var(--accent-color);
      text-decoration: none;
    }
    a:hover {
      text-decoration: underline;
    }
    .integration-block {
      margin: 1rem 0;
    }
    .callout-block,
    .code-block {
      margin: 1rem 0;
      padding: 1rem;
      border-radius: 4px;
      background: #f8f9fa;
    }
    .code-block {
      font-family: monospace;
      font-size: 0.9rem;
    }
    .download-btn {
      display: inline-block;
      background: var(--accent-color);
      color: white;
      padding: 0.75rem 1.5rem;
      border-radius: 6px;
      text-decoration: none;
      font-weight: bold;
      transition: background 0.2s;
    }
    .download-btn:hover {
      background: #2980b9;
      text-decoration: none;
    }