.log-in {
    background-color: white;
    align-self: center;
    width: 500px;
    margin-top: 20mm;
    border-radius: 10px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    padding: 2%;
    display:flex;
    flex-wrap: wrap;
    flex-direction: column;
    align-content: center;
}

#potvrda-lozinke {
    width: 200px;
    align-self: center;
}

.column {
    display: flex;
    flex-direction: column;
    align-content: center;
    text-align: center;
}

#ime-vozaca {
    text-align: center;
}

input[type="text"]::placeholder {  
                  
    /* Firefox, Chrome, Opera */ 
    text-align: center; 
} 

.mdl-textfield__input {
    text-align: center;
}