.erp-menu {
    margin: 0;
    padding: 0;
    list-style: none;
}

.menu-item {
    position: relative;
}

.menu-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    line-height: 1.25;
    text-decoration: none;
    color: #fff;
    background: #1E4F4A;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

    .menu-link > i {
        width: 22px;
        margin-right: 8px;
        text-align: center;
    }

    .menu-link:hover {
        background: #296760;
    }

    .menu-link span:first-of-type {
        flex: 1;
        text-align: left;
    }

.menu-arrow {
    transition: .25s;
}

.menu-item.open > .menu-link .menu-arrow {
    transform: rotate(90deg);
}

.erp-submenu {
    display: none;
    margin: 0;
    padding: 0;
    list-style: none;
    background: #2B6661;
}

.menu-item.open > .erp-submenu {
    display: block;
}

.erp-submenu a {
    display: block;
    padding: 7px 20px 7px 30px;
    line-height: 1.25;
    color: #fff;
    text-decoration: none;
}

    .erp-submenu a > i {
        width: 20px;
        margin-right: 7px;
        text-align: center;
    }

    .erp-submenu a:hover {
        background: #397873;
    }