body {
  background: #87CEEB;
  font-family: Tahoma, "Trebuchet MS", Verdana, Sans-Serif;
}

[href^="http"]::after {
  content: url(https://img.icons8.com/small/16/external-link.png);
  width: 25%;
  height: auto;
}

.intro {
  background: #4682B4;
  display: block;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  margin: 3px;
}

.intro img {
  display: block;
  margin-left: auto; 
  margin-right: auto;
  width: 25%; 
}

.intro h1,h3,p {
  text-align: center;
}