WelcomeToFlask/static/css/style.css

body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  padding: 50px;
}

p {
  font-size: 18px;
  color: #34495e;
}

img {
  border-radius: 10px;
  margin-top: 20px;
}