.menu>div {
    padding: 10px;
    font-size: 16px;
    text-transform: uppercase;
    border: 1px solid #ddd;
}

.menu>div:nth-child(4n+1),
.menu>div:nth-child(4n) {
    background-color: #fcfcfc;
}

.menu div.head {
    background-color: var(--primary);
    color: #fff;
}