* {
    box-sizing: border-box;
  }
  
  @font-face {
    font-family: Roboto;
    font-style: normal;
    font-weight: 300;
    src: url(https://fonts.gstatic.com/s/roboto/v20/KFOlCnqEu92Fr1MmSU5fCRc4AMP6lbBP.woff2); 
  }
  
  body {
    padding: 20px;
    font-family: Roboto, Arial, sans-serif;
    font-size: 16px;
    line-height: 22px;
    color: currentColor;
  }
  
  header {
    margin-bottom: 30px;
  }
  
  .container {
    max-width: 700px;
  }
  
  main {
    padding: 0;
  }
  
  fieldset {
    margin: 15px 0;
  }
  
  fieldset p {
    padding: 0;
    margin: 0;
    color: #6d6d6d;
    font-style: italic;
  }
  
  textarea {
    width: 100%;
    border: 2px solid currentColor;
    height: 200px;
    padding: 10px;
  }
  
  #warnings {
    color: #dd0000;
    padding: 5px 0;
  }
  
  #warnings:empty {
    display: none;
  }
  
  .audio-error {
    color: red;
    border: 2px solid red;
    padding: 10px;
  }
  
  pre, span.code {
    font-size: 14px;
    padding: 5px;
    font-family: Monaco, monospace;
    border: 1px solid #ffffff;
  }
  
  a {
    color: currentColor;
  }
  
  a:visited {
    color: currentColor;
  }
  
  h1 {
    margin: 20px 0;
  }
  
  h2 {
    margin-bottom: 5px;
  }
  
  p {
    text-align: start;
  }
  
  input {
    font-size: 1em;
  }
  
  button {
    margin: 0 4px;
    padding: 5px 10px;
    font-size: inherit;
    background: #e2fdf1;
    border: 1px solid #5c5c5c;
    border-radius: 4px;
  }
  
  button:hover {
    background-color: #3FB07C;
    color: white;
    border-color: #3FB07C;
  }
  
  .visible-background svg {
    background: #f5f5f5;
  }
  
  table {
    border-spacing: 0;
  }
  
  th {
    text-align: start;
  }
  
  th, td {
    border: 1px solid #dfe2e5;
    padding: 16px 20px;
  }
  
  tr:nth-child(even) {
    background-color: #F6F8FA;
  }
  
  .table-header td {
    background: #adf3f3;
    font-size: 22px;
  }
  
  @media only screen and (min-width:700px) {
  
    header {
      max-width: 1000px;
      margin: 0 auto 30px auto;
      padding: 0 30px;
    }
  
    /* center content on wider screens */
    .container {
      margin: 0 auto;
      max-width: 770px;
    }
  
    h1 {
      text-align: center;
    }
  
    table {
      margin: 0 auto;
    }
  }
  
  @media (prefers-color-scheme: dark) {
    body {
      color: #ffffff;
      background: #121212;
    }
    .table-header td {
      color: #000000;
    }
    tr:nth-child(even) {
      background-color: #666666;
    }
    .visible-background svg {
      background: #404040;
    }
  }