@media only screen and (max-width : 768px) {
    .main_container {
        padding: 20px;
    }
}

@media only screen and (max-width : 575px) {
    .navbar .nav-logo {
        width: 150px;
        padding: 10px 20px;
    }

    .navbar .dropdown-menu {
        top: calc(100% - 2px);
    }

    .navbar-expand-sm .navbar-nav .dropdown-menu {
        position: absolute;
    }
}

@media only screen and (max-width : 480px) {
    .btn_add_product {
        width: 100%;
    }
}

@media only screen and (max-width : 320px) {
    .navbar .nav-logo {
        display: none;
    }
}