:root {
    --color-primary: #4f46e5;
    --color-bg: #f1f5f9;
    --text-secondary: #374151;
  }
  
  body {
    font-family: Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono,
      Bitstream Vera Sans Mono, Courier New, monospace, serif;
    background-color: var(--color-bg);
  }
  
  main {
    max-width: 40rem;
    margin: 0 auto;
    padding: 2rem 0;
  }
  
  blockquote {
    margin: 0;
    color: var(--text-secondary);
  }
  
  a {
    color: var(--color-primary);
    text-decoration: none;
  }
  
  a:hover {
    color: #818cf8;
    text-decoration: underline;
  }
  
  h1 {
    font-size: 1.5rem;
    line-height: 2rem;
  }
  
  h2 {
    font-size: 1.25rem;
    line-height: 1.75rem;
    margin-bottom: 1rem;
  }
  
  p {
    margin: 1.5rem 0;
    line-height: 1.5;
  }
  
  ul {
    line-height: 1.3;
  }

  .links-list {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }

  .links-list > a {
    display: block;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }

  .activity-grid {
    display: grid;
    grid-template-columns: 1fr 4fr;
    column-gap: 1rem;
    row-gap: 1rem;

    > h4 {
      margin: 0;
    }
  }
  
  @media only screen and (max-width: 600px) {
    main {
      padding: 0 0.5rem;
    }

    .links-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
    }

    .activity-grid {
      grid-template-columns: 1fr;
    }
  }
  
  @media (prefers-color-scheme: dark) {
    :root {
      --color-primary: #818cf8;
      --color-bg: #18181b;
      --text-secondary: #9ca3af;
    }
  
    body {
      color: white;
    }
  }