body {
    background: #f8f9fa;
}
nav.navbar { margin-bottom: 20px;
    border-bottom: 1px solid black; }

.language_selected { font-weight: 900; }

.mt_40 { margin-top:40px; }
.mb_40 { margin-bottom:40px; }

ul.errorlist {
    position: relative;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.25rem;
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
    list-style-type: none;
}

.card { float: left; margin-left:10px; margin-right:10px;}