html {
  height: 100%;
  width: 100%;
}
h1 {
  text-decoration: underline;
  color: green;
  text-align: center;
}

h3 {
  text-decoration: underline dotted;
  color: pink;
  text-align: left;
}

img {
  padding: 15px;
  border: 2px dotted;
  border-color: red;
}