.add_button {
    background-color: black !important;
    color: white !important;
    border: 3px solid gray !important;
    font-size: 20px !important;
    border-radius: 20px !important;
    padding-left: 20px !important;
    padding-right: 20px !important;
    margin-bottom: 10px;
}

.add_button:hover {
    border-color: black !important;
}