@charset "UTF-8";
body{
    font-size: 90%;
}

main{
    height: 350px;
    width: 90%;
    margin: 5% auto 0;
    background-color: #666;
}
main h2{
    width: 100%;
    color: #fff;
    background-color: #333;
    text-align: center;
}
div{
    width: 18%;
    margin: 3% 1%;
    float: left;
    background-color: #fff;
}
div:nth-of-type(odd){
    background-color: #ccc;
    
}