.login-box {
    
    display:flex;
    justify-content: center;
}
.login-box__toggle-btn {
    z-index:100;
    position: relative;
    margin-left:-3px;
    margin-right:-3px;
    color: #999;
}


.login-box__content {
    border: 1px solid #cdcdcd;
    padding: 15px;
    margin-top: -15px;
    
}
@media (min-width: 768px) {
    .login-box__content {
       flex-basis: 50%;
    }
}
.input-group-addon:first-child {
    min-width: 40px;
}
.login-box__input-group {
    margin-bottom: 10px;
}