body {
  background-image: url('https://i.imgur.com/vNTXIq4.jpeg');
}

section {
  margin: auto;
  max-width: 550px;
  background-color: white;
  border: 3px darkblue dashed;
}

#flex {
  display: flex;
  flex-direction: column;
}

.header {
  margin: auto;
}

.navbar {
  margin: auto;
  padding: 10px;
}

.swanky-and-moo-moo-regular {
  font-family: "Swanky and Moo Moo", cursive;
  font-weight: 400;
  font-style: normal;
}

a {
  font-family: "Swanky and Moo Moo", cursive;
  color: #2f3e69;
  transition: 0.3s;
  font-size: 18px;
  text-decoration: none;
}

a:hover {
  letter-spacing: 3px;
  text-decoration: underline;
}

ul {
  list-style-image: url(/image/pixline.gif);
}

.nest {
  list-style-image: url(/image/pixlow.gif);
}

@media (max-width: 800px) {
  section {
    max-width: 800px;
    width: 100%;
  }
  .navbar {
    width: 100%;
    padding: 0;
  }
  
  .header {
    max-width: 100%;
    overflow: hidden;
    height: 200px;
    padding: 0;
  }
}