.header-logo {
    max-height: 50px;
    max-width: 250px;
}


/* The alert message box */
.alert {
    padding: 20px;
    color: white;
    margin-bottom: 15px;
}

.error {
    background-color: #f44336;
}

.success {
    background-color: #4CAF50;
}

/* The close button */
.closebtn {
    margin-left: 15px;
    color: white;
    font-weight: bold;
    float: right;
    font-size: 22px;
    line-height: 20px;
    cursor: pointer;
    transition: 0.3s;
}

/* When moving the mouse over the close button */
.closebtn:hover {
    color: black;
}

@media (max-width: 991.98px) {
    div.white-out {
        position: relative;
        display: inline-block;
    }
}

@media (max-width: 991.98px) {
    div.white-out:after {
        position: absolute;
        content: '';
        display: block;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, .5);
    }
}