* {
  box-sizing: border-box;
}

h1, h2, h3 {
  font-size: 20px;
  color: #721a00;
}

p {
  line-height: 1.25;
}

.container {
  width: 500px;
  margin: 0 auto;
  margin-bottom: 100px;
}


#title {
  font-size: 40px;
  text-align: center;
  border: 3px solid green;
}

header nav {
  text-align: center;
}

header nav a {
  margin-left: 20px;
  font-size: 18px;
  text-decoration: none;
}