body.dark-mode {
    background: #1a1a1a;
    color: #f0f0f0;
}
body.dark-mode .background {
    background-color: rgba(30, 30, 30, 0.95);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}
body.dark-mode nav a {
    color: #006400;
}
body.dark-mode nav a:hover {
    color: #008000;
}
body.dark-mode h1,
body.dark-mode h2 {
    color: #ff4d4d;
}
body.dark-mode button {
    background-color: #444;
    color: white;
}
body.dark-mode button:hover {
    background-color: #666;
}