#kbr-form{
    max-width:600px;
    margin:auto;
    background:#fff;
    padding:25px;
    border-radius:16px;
    box-shadow:0 4px 25px rgba(0,0,0,0.08);
}

#kbr-form input{
    width:100%;
    padding:14px;
    margin-bottom:15px;
    border:1px solid #ddd;
    border-radius:10px;
    font-size:16px;
    box-sizing:border-box;
}

#kbr-form button{
    width:100%;
    background:#111;
    color:#fff;
    border:none;
    padding:15px;
    border-radius:10px;
    font-size:16px;
    cursor:pointer;
    transition:0.3s;
}

#kbr-form button:hover{
    opacity:0.9;
}

#kbr-message{
    margin-top:15px;
}

@media(max-width:768px){

    #kbr-form{
        padding:18px;
    }

    #kbr-form input,
    #kbr-form button{
        font-size:15px;
    }
}