a {
    color: #727cf5;
}
.dropdown-menu .dropdown-submenu {
    display: none;
    position: absolute;
    left: 100%;
    top: -7px;
}

.dropdown-menu .dropdown-submenu-left {
    right: 100%;
    left: auto;
}

.dropdown-menu > li:hover > .dropdown-submenu {
    display: block;
}

.btn.btn-sm {
    padding: 0.1rem;
}