body {
  font-family: 'Segoe UI', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f4f4f4;
}

.container {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 30px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1,
h2,
h3 {
  color: #2c3e50;
}

h1 {
  border-bottom: 2px solid #3498db;
  padding-bottom: 10px;
}

h2 {
  margin-top: 30px;
}

p {
  margin-bottom: 15px;
}

ul {
  margin: 15px 0;
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
}

a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.footer {
  margin-top: 30px;
  font-size: 0.9em;
  color: #777;
  border-top: 1px solid #ddd;
  padding-top: 20px;
}

@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  .container {
    padding: 20px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 18px;
  }
}