body {
  font-family: sans-serif;
  text-align: center;
}

#header {
    margin: 0 auto;
    max-width: 900px;
}

#header img {
  width: 40px;
  display: inline-block;
  padding-right: 20px;
}

#header h1 {
  display: inline-block;
  font-size: 32px;
  margin: 0;
}

#main-content {
    margin: 0 auto;
    max-width: 900px;
}

#main-content img {
  width: 400px;
  margin: 24px 0;
}

#main-content h2 {
  font-size: 24px;
  margin: 16px 0;
  text-align: left;
}

#main-content p {
  font-size: 16px;
  line-height: 1.5;
  margin: 0;
  text-align: left;
}

#main-content ul {
  list-style-type: square;
  margin: 0;
  padding-left: 60px;
}

#main-content li {
  font-size: 16px;
  margin: 8px 0;
  text-align: left;
}

#footer {
  margin: 24px;
}

#footer p {
  font-size: 12px;
  color: #999;
}

  .container {
    display: flex;
  }

  @media (max-width: 600px) {
    .container {
      flex-direction: column;
    }
  }