* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #fafafa;
    color: #333;
  }
  
  h2 {
    border-bottom: 2px solid #ccc;
    padding-bottom: 0.5rem;
  }