body {
  font-family: "Open sans","Helvetica", "Arial","Sans-serif";
  margin: 0;
  padding: 0;
  background-color:#f0f0f2;
}

header {
  background-color: #f1f1f1;
  padding: 20px;
}

h1 {
  text-align: center;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

nav li {
  display: inline-block;
  margin: 0 10px;
}

nav a {
  text-decoration: none;
  color: black;
}

.hero {
  text-align: center;
  padding: 50px;
}

.hero img {
  width: 250px;
  border-radius: 50%;
  display: block;
  margin: 0 auto;
}

.about {
  padding: 20px;
}