:root {
    --primary: #4f46e5; /* indigo */
    --text: #1f2937;
    --muted: #6b7280;
    --bg: #f9fafb;
    --card: #ffffff;
  }
  
  * {
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  }
  
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
  }
  
  .container {
    max-width: 900px;
    margin: auto;
    padding: 40px 20px;
  }
  
  header {
    margin-bottom: 30px;
  }
  
  h1 {
    color: var(--primary);
    font-size: 2rem;
  }
  
  h2 {
    margin-top: 30px;
    font-size: 1.2rem;
  }
  
  p {
    margin: 10px 0;
  }
  
  .lang-switch {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
  }
  
  .lang-switch a {
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    background: var(--card);
    border: 1px solid #ddd;
    color: var(--text);
    font-size: 0.9rem;
  }
  
  .lang-switch a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
  }
  
  section {
    background: var(--card);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.04);
  }
  
  footer {
    margin-top: 40px;
    font-size: 0.85rem;
    color: var(--muted);
    text-align: center;
  }