body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  transition: background-color 0.3s, color 0.3s;
}
.container {
  text-align: center;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  background-color: white;
}
button {
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  transition: background-color 0.3s;
}
button:hover {
  background-color: #0056b3;
}
body.light-mode {
  background-color: #f4f4f4;
  color: #333;
}
body.dark-mode {
  background-color: #333;
  color: brown;
}
h1 {
  margin-bottom: 20px;
}
p {
  font-size: 18px;
  line-height: 1.6;
  margin: 10px 0;
}
ul {
  text-align: left;
  padding-left: 20px;
  margin-top: 20px;
}
li {
  margin: 8px 0;
}
a {
  color: #007bff;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
