body {
    margin: 15px;
}

#error {
    color: red;
}

.title_username {
    font-style: italic;
    color:chocolate;
}

.btn_mnu:hover {
    cursor: pointer;
}

.btn_mnu {
    text-align: center;
}

/* Media queries */
@media screen and (max-width: 650px) {
    .standen_table th:nth-child(4),
    .standen_table td:nth-child(4),
    .standen_table th:nth-child(5),
    .standen_table td:nth-child(5),
    .standen_table th:nth-child(6),
    .standen_table td:nth-child(6)
    {
        display: none;
    }
}

select {
    width: 100%;
    height: 40px;
}

select,button {
    margin-top:15px;
    margin-bottom: 15px;
    margin-right: 15px;
}

i {
    font-size: 2em;
}

.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: black;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;

    /* Position the tooltip */
    position: absolute;
    z-index: 1;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
}