.tabela-nau {
    margin: auto;
    /*border: 2px solid #c0c0c0;*/
    border-collapse: separate; 
    border-spacing: 0;
}

.tabela-nau-cont {
    margin: auto;
    display: block;
    overflow-x: auto;
}

.tabela-nau td {
    padding: 2px;
}

.tabela-nau a { /* nauczyciel */
    display: inline-block;
    font-size: 16px;
    font-family: Arial, sans-serif;
    width: 175px;
    /*height: 43px;*/
    line-height: 30px;
    padding: 4px 0;
    margin-left: 2px;
    margin-right: 2px;
    font-weight: bold;
    white-space: nowrap;
    margin-top: 1px;
    /*background-color: #f0f0f0;*/
    text-align: center;
    text-decoration: none;
    
    box-sizing: border-box;
}



.nau_header {
    text-align: center;
    place-items: center;
    display: grid;
    height: 50px;
}
.nau_header h1 {
    font: bold 36px verdana,sans-serif;
    margin: 0px;
}

.nau_header_separator {
    margin-top: 0px;
    margin-bottom: 6px;
    
}