form {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#mainPage {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.hidden {
    display: none;
}

.btn-right {
    padding: 20px;
    position: absolute;
    bottom: 0;
    right: 0;
    width: 260px;
    top: 0;
}
.btn-right2 {
    padding: 20px;
    position: absolute;
    bottom: 0;
    right: 200px;
    width: 260px;
    top: 0;

}