a {
    color: black;
    font-size: 20px;
}

#container {
    background-color: green;
    width: 1000px;
    min-height: 600px;
    margin: auto;
}

#menu {
    background-color: yellowgreen;
    text-decoration: none;
    margin: auto;
}

#menu>ul>li {
    display: inline-block;
    margin: 10px;
    font-size: 30px;
    font-weight: bold;
    ;
    list-style-type: none;
}

#menu a {
    color: black;
    font-weight: bold;
    text-decoration: none;
}

#content>ul>li.product {
    display: inline-block;
    margin: 5px;
    font-size: 40px;
    background-color: burlywood;
    width: 300px;
    height: 300px;
    text-align: center;
    border-radius: 30px;
    text-decoration: none;
    list-style-type: none;
}

#content li.product:hover {
    background-color: blueviolet;
}