.main{
    width: 1050px;
    margin: 0 auto;
    font-family:arial;
    font-size:12px;
}
.header{
    width: 1050px;
    min-height: 100px;
    font-family: arial;
    font-size: 12px;
}

.borderek{
    float: left;
    width: 500px;
    min-height: 200px;
    border: solid 1px gray;
    margin: 2px;
    border-radius: 10px;
}

.borderek h3{
    margin-left: 10px;
    color: gray;
}

.borderek h4{
    margin-left: 8px;
    color: gray;
}

.tabelka{
    width: 420px;
    border: 1px solid lightgrey;
    margin-left: 10px;
    font-family: arial;
    font-size: 10px;
    border-collapse: collapse;
}

.tabelka th, td {
    padding: 10px;
    border: 1px solid lightgrey;
}