body {
  font-family: 'Arial', sans-serif;
  background-color: #f9f9f9;
  color: #444;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 800px;
  margin: 50px auto;
  padding: 25px;
  background-color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  line-height: 1.6;
  text-align: justify;
}

h1,
h2 {
  text-align: center;
  color: #333;
}

h3 {
  color: #333;
  margin-top: 25px;
}

ul {
  margin-left: 20px;
  margin-bottom: 20px;
}

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

a:hover {
  text-decoration: underline;
}

@media (max-width: 1024px) {
  .container {
    padding: 20px;
    margin: 40px auto;
  }

  h1,
  h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 18px;
    margin: 30px auto;
  }

  h1,
  h2 {
    font-size: 1.6rem;
  }

  h3 {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 15px;
    margin: 20px auto;
  }

  h1,
  h2 {
    font-size: 1.4rem;
  }

  h3 {
    font-size: 1rem;
  }
}

@media (min-width: 1440px) {
  .container {
    max-width: 1000px;
    padding: 30px;
  }

  h1,
  h2 {
    font-size: 2.2rem;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #0d1117;
    color: #e6edf3;
  }

  .container {
    background-color: #12161b;
  }

  h1,
  h2,
  h3 {
    color: #93c5fd;
  }

  p,
  li {
    color: #e6edf3;
  }

  a {
    color: #3b82f6;
  }
}