#formgroup{
    width: calc(100% - 180px);
    max-width: 500px;
}

#formgroup #inputurl{
    display: block;
    width: 100%;
    height: calc(1.9em + .75rem + 2px);
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #000000;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: .25rem;
    outline: none;
}
 
button#inputsub{
    margin-left: 4px;
}

.form-inline {
    justify-content: center;
}

.alert{
    max-width: 600px;
    margin: 0 auto;
}

.btn-outline-info{
    background-color: #f7f8fa;
}

@media(max-width:600px){
    #formgroup{
        width: 100%;
    }
    #inputsub{
        position: relative;
        display: block;
        width: calc(100% - 2px);
        margin-left: 0!important;
        margin-top: -4px;
    }
}