style.css

h1 {
  text-align: center;
}

img#overview {
  max-width: 1000px;
  max-height: 600px;
  display: block;
  margin: auto;
}

img#style-image {
  max-width: 1000px;
  max-height: 600px;
  display: block;
  margin: auto;
}