custom1.css

/* Change button primary color to green */
.btn-primary {
    background-color: #4CAF50;
    border-color: #4CAF50;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #45a049;
    border-color: #45a049;
}

/* Change sidebar navigation to black with white text */
.sidebar {
    background-color: #000;
    color: #fff;
}

.sidebar a {
    color: #fff;
}

.sidebar a:hover {
    color: #ccc;
}