* {margin: 0; box-sizing: border-box;}
header {
    height: 300px;
    text-align: center;
    padding-top: 100px;
    margin: 0 auto;
    max-width:250px;
}

main #services {
    height:600px;
    display: flex;
    justify-content: space-between;
    max-width: 1000px;
    flex-wrap: wrap;
    margin: 0 auto;
    padding: 100px 0;
}

main #services #service {
    height:50px;
    width: 50px;
    border: 5px solid black;
}