body {
  font-family: Arial, sans-serif;
  background-color: #f8f8f8;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #ffffff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #333333;
}

h2 {
  color: #444444;
}

p {
  line-height: 1.6;
  color: #666666;
}

ul {
  list-style-type: none;
  padding: 0;
}

ul li {
  padding: 5px 0;
}

a {
  color: #1a73e8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .container {
    padding: 10px;
    margin: 0 auto;
    max-width: 100%;
  }
}

@media (max-width: 400px) {
  .container {
    padding: 10px;
    margin: 0 auto;
    max-width: 100%;
  }

  h1 {
    font-size: 1.5em;
  }

  h2 {
    font-size: 1.2em;
  }

  p {
    font-size: 1em;
  }

  ul {
    font-size: 0.9em;
  }

  ul li {
    padding: 5px 0;
  }

  a {
    font-size: 0.9em;
  }

  a:hover {
    text-decoration: underline;
  }
}