section form {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}
section form .flex {
    margin-left: -7px;
    margin-right: -7px;
    -webkit-display: flex;
    display: flex;
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
}
section form .flex:before,
section form .flex:after {
    display: none;
}
section form .flex .login-izda {
    padding-right: 25px;
}
section form .flex .login-izda {
    padding-left: 30px;
}
section form .flex .login-izda:before {
    content: '';
    width: 2px;
    height: calc(100% - 22px);
    background-color: #4a4a49;
    position: absolute;
    top: 0;
    right: 0;
}
section form .flex-envio {
    margin-top: 10px;
}

section form .flex-envio .dua-checkbox label span {
    width: calc(100% - 18px);
}
section form .flex-envio .dua-checkbox label {
    -webkit-align-items: flex-start;
    align-items: flex-start;
}
section form .flex-envio .dua-checkbox input {
    margin-top: 3px;
}

@media (max-width: 991px) {
    section form .flex {
        -webkit-flex-direction: column-reverse;
        flex-direction: column-reverse;
    }
    section form .flex .login-izda {
        padding-left: 15px;
        padding-right: 15px;
        margin-top: 30px;
    }
    section form .flex .login-izda:before {
        display: none;
    }
}
@media (min-width: 768px) {
    section form .flex-envio > div + div > div{
        height: 100%;
        display: -webkit-flex;
        display: flex;
        -webkit-flex-direction: column; 
        flex-direction: column; 
        -webkit-justify-content: space-between;
        justify-content: space-between;
        -webkit-align-items: flex-end;
        align-items: flex-end;
    }
}
@media (min-width: 600px) {
    section form .btn-black,
    section form .btn-corp {
        width: 220px;
    }
}