table.kalendar {
    border-collapse: collapse;
}

.kalendar td,
.kalendar th {
    border: 1px solid #ffffff;
    padding: 5px 10px;
    text-align: center;
    font-weight: normal;
}

p#dnes {
    background-color: #ffffff;
    color: black;
    font-weight: bold;
}

.barva{
    background-color: #ffffff;
    color: black;
    font-weight: bolder; 
}