body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background: forestgreen;
  color: white;
  padding: 1em;
  text-align: center;
}
nav a {
  margin: 0 15px;
  color: white;
  text-decoration: none;
}
#hero {
  padding: 4em;
  background: url('https://images.unsplash.com/photo-1599058917212-f83db07877f3') no-repeat center/cover;
  color: white;
  text-align: center;
}
.btn {
  display: inline-block;
  padding: 1em;
  background: darkgreen;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
#shop {
  padding: 2em;
}
.product {
  margin-bottom: 2em;
}
footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 1em;
}