#mainMenu {
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    display: inline;
    vertical-align: text-bottom;
    text-align: center;
    background: #fff;
}

@media screen and (max-width: 550px) {
    #mainMenu {
        font-size: 12px;
    }
}

@media screen and (max-width: 370px) {
    #mainMenu {
        font-size: 10px;
    }
}

.menu {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.menu-item {
    float: left;
    cursor: pointer;
    margin: 10px;
}

.menu-item.active {
    font-weight: 600;
}