html, body {
    height: 100%;
    margin: 0;
  }
  body {
    background: radial-gradient(circle at center,
                                #fff 0%, #f8f8f8 75%, #ebebeb 100%);
    color: #222;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  main {
    text-align: center;
    padding: 1rem;
  }
  h1 {
    font-size: 2.5rem;
    margin: 0;
    line-height: 1.1;
  }
  /* yellow stripe under the title */
  h1::after {
    content: "";
    display: block;
    height: .5rem;
    margin-top: 1rem;
    background: repeating-linear-gradient(45deg,
                  #ffe800, #ffe800 .5rem,
                  #222 .5rem, #222 1rem);
  }
  p {
    margin-top: 1rem;
  }

  .cat {
    display: block;
    margin: 1rem auto 0;
    width: clamp(200px, 75%, 500px) !important;
    height: auto !important;
    max-height: 80vh !important;
  }