body.dark-mode {
  background-color: #121212;
  color: #f0f0f0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

a {
  color: #90cdf4;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  color: #ffffff;
}

ul {
  list-style: disc;
  padding-left: 1.5rem;
}

section {
  margin-bottom: 2rem;
}

p, li {
  font-size: 1rem;
}