div.hlavni {
    border: 4px solid white;
    border-radius: 15px;
    padding: 10px;
}

div#cerv {
    background-color: grey;
    padding: 30px;
    border-radius: 100%;
    margin: 15px;
}

div#zlut {
    background-color: grey;
    padding: 30px;
    border-radius: 100%;
    margin: 15px;
}

div#zele {
    background-color: grey;
    padding: 30px;
    border-radius: 100%;
    margin: 15px;
}

div#cer {
    background-color: grey;
    padding: 30px;
    border-radius: 100%;
    margin: 15px;
}

div#zlu {
    background-color: grey;
    padding: 30px;
    border-radius: 100%;
    margin: 15px;
}

div#zel {
    background-color: grey;
    padding: 30px;
    border-radius: 100%;
    margin: 15px;
}
section a{
    margin: 10px;
    padding: 10px;
}