.main-nav ul{
    list-style-type: none;
}
.main-nav ul.main-menu li{
    list-style: none;
    margin: 10px;
    display:inline-block;
}

.main-nav ul.sub-menu {  
    padding-top:10px;
    padding-bottom: 10px;;
    background-color: lightgray;  
}

.main-nav ul.sub-menu li {
    display:block;
}

.hidden_select {
    display: none;
}

.error {
    color: red;
    font-size: 0.9em;
    margin-left: 10px;
}

button{
    cursor: pointer;
}

.box__pic .form-check{
    z-index: 1;
}