/* nav-linkでアイテムが選択状態の時は黄色 */
.navbar-dark .navbar-nav .nav-link.active, .navbar-dark .navbar-nav .show>.nav-link {
    color: #ff0;
    font-weight: bold;
}

.navbar-dark .navbar-nav .nav-link {
    color: #fff;
}

.errorMessage {
    background-color: darkorange;
    margin-left: -50px;
    border-bottom: 1px solid white;
    color: white;
    padding-left: 10px;
}