body {
    background-color: #ffffff;
    color: #333333;
}

#theme-switch {
    background-color: #f0f0f0;
    color: #333333;
}

#theme-switch:hover {
    background-color: #e0e0e0;
}

.feature-card {
    background-color: #f8f8f8;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.join-button {
    background-color: #4CAF50;
    color: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.join-button:hover {
    background-color: #45a049;
}

footer {
    background-color: #f8f8f8;
    color: #666666;
}