/* Default Theme */
body.default-theme {
    font-family: 'Roboto', sans-serif;
    background: #f8f9fa;
    color: #212529;
}
body.default-theme .card-header {
    background-color: #007bff;
    color: white;
}
body.default-theme h1 {
    color: #007bff;
}
body.default-theme .btn-link {
    color: #ffffff; /* Ensure links are visible on blue background */
}

/* Dark Theme */
body.dark-theme {
    font-family: 'Roboto', sans-serif;
    background: #343a40;
    color: #f8f9fa;
}
body.dark-theme .card-header {
    background-color: #495057;
    color: white;
}
body.dark-theme h1 {
    color: #f8f9fa;
}
body.dark-theme a {
    color: #17a2b8;
}
body.dark-theme .btn-link {
    color: #17a2b8; /* Light blue links for dark background */
}

/* Green Theme */
body.green-theme {
    font-family: 'Roboto', sans-serif;
    background: #e8f5e9;
    color: #2e7d32;
}
body.green-theme .card-header {
    background-color: #388e3c;
    color: white;
}
body.green-theme h1 {
    color: #2e7d32;
}
body.green-theme a {
    color: #2e7d32;
}
body.green-theme .btn-link {
    color: #ffffff; /* White links for green background */
}