form input,
form input[type="checkbox"] + label,
form textarea{margin:10px 0px}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="tel"],
form textarea{font-size: 1em;padding:8px 15px;border:1px solid var(--engel-black);width:100%;box-sizing: border-box; font-family:inherit}

form textarea{min-height:200px;}

form input[type="checkbox"]{
    position: absolute;
    visibility: hidden;
    z-index: -1000;
    left: -5000px;
}
form input[type="checkbox"] + label{
    padding-left: 30px;
    position: relative;
    display: block;
    cursor: pointer;
}
form input[type="checkbox"] + label:before{
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    background: #fff;
    width: 16px;
    height: 16px;
    border: 2px solid var(--engel-black);
    border-radius: 4px;
}
form input[type="checkbox"]:checked + label:after{
    content: "";
    position: absolute;
    left: 4px;
    top: 9px;
    background: var(--engel-black);
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

form form button.ao_btn{ 
    margin: 20px 0 0 auto;
    display: block;
}

.caret {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 2px;
    vertical-align: middle;
    border-top: 8px dashed;
    border-top: 4px solid \9;
    border-right: 8px solid transparent;
    border-left: 8px solid transparent;
    color: var(--engel-black);
}


/*
.form-control.is-invalid {
    border-color: #dc3545;
}

.is-invalid~.invalid-feedback {
    display: block;
}
.invalid-feedback {
    display: none;
    color: #dc3545;
}*/