.dropdown-menu {
    & li {
        position: relative;
    }

    & .dropdown-submenu {
        display: none;
        position: absolute;
        left: 100%;
        top: -7px;
    }

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

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

.active-gear {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}