.SideBar_SignIn {
    padding-top: 50px;
    position: fixed;
    width: 300px;
    display: grid;
}

.SideBar_SignIn .Title {
    text-align: center;
}

@media (max-width: 660px) {
    .SideBar_SignIn {
        position: relative;
        width: 100%;
        height: 150px;
        padding-top: 20px;
    }
}