/* 20px body font */
html {
    font-size: 125%;
  }
  
  body {
    margin: 1rem;
    font-family: system-ui, Helvetica, Verdana, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: #333;
    background-color: #fff;
  }
  
  .container {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .responsive-image {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
  }
  
  .danger {
    color: red;
    font-weight: bold;
  }