body {
    background: #3EC2E2;


}
.form {
    padding-top: 40px;

}

.container {
    margin: auto;
    width: 50%;
    padding-top: 30px;
    background: #48A9A6;
    -webkit-box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
    -moz-box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
    box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
    /*box-shadow: 0 0 15px rgba(0, 0, 0, 1);*/
    position: relative;
    text-align: center;
    justify-content: center;
}

.tekst {
    text-align: center;
    color: white;
    font-size: 14pt;
    margin-top: 30px;
    font-family: Verdana;
}
.header {
    text-align: center;
    color: white;
    font-size: 20pt;
    margin-top: 0px;
    font-family: Verdana;
}

.img {
    text-align: center;
    justify-content: center;
    background: #3EC2E2;
}

.textbox {
    height: 30px;
    width: 200px;
    font-size: 15pt;
    text-align: center;
    margin-top: 10px;
    margin-bottom: 20px;
    border: 2px solid black;
}

.knop {
    background-color: #dce6ef;
    width: 110px;
    border: 1px solid black;
    color: black;
    text-align: center;
    text-decoration: none;
    font-size: 20px;
    display: inline-block;
    position: relative;
    margin-bottom: 10px;
    height: 35px;
}




@media only screen and (max-device-width : 767px) and (-webkit-device-pixel-ratio : 3) {
    .form {
        padding-top: 40px;
    }

    .container {
        margin: auto;
        width: 50%;
        padding-top: 30px;
        background: #48A9A6;
        -webkit-box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
        -moz-box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
        box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
        /*box-shadow: 0 0 15px rgba(0, 0, 0, 1);*/
        position: relative;
        text-align: center;
        justify-content: center;
    }

    .tekst {
        text-align: center;
        color: white ;
        font-size: 30pt;
        margin-top: 30px;
        font-family: Verdana;
    }
    .header {
        text-align: center;
        color: white;
        font-size: 40pt;
        margin-top: 30px;
        font-family: Verdana;
    }

    .img {
        text-align: center;
        justify-content: center;
        background: #3EC2E2;
    }

    .textbox {
        height: 60px;
        width: 400px;
        font-size: 35pt;
        text-align: center;
        margin-top: 20px;
        margin-bottom: 20px;
    }

    .knop {
        background-color: #4b5052;
        width: 190px;
        border: 2px solid black;
        color: whitesmoke;
        text-align: center;
        text-decoration: none;
        font-size: 30px;
        display: inline-block;
        position: relative;
        margin-bottom: 10px;
        height: 55px;
        -webkit-appearance: none;
        -moz-appearance: none;

    }
}
@media only screen and (max-device-width : 767px) {
    .form {
        padding-top: 40px;
    }

    .container {
        margin: auto;
        width: 50%;
        padding-top: 30px;
        background: #48A9A6;
        -webkit-box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
        -moz-box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
        box-shadow: 0px 2px 17px 4px rgba(0,0,0,0.75);
        /*box-shadow: 0 0 15px rgba(0, 0, 0, 1);*/
        position: relative;
        text-align: center;
        justify-content: center;
    }

    .tekst {
        color: white;
        text-align: center;
        font-size: 30pt;
        margin-top: 30px;
        font-family: Verdana;
    }
    .header {
        text-align: center;
        color: white;
        font-size: 40pt;
        margin-top: 30px;
        font-family: Verdana;
    }

    .img {
        text-align: center;
        justify-content: center;
        background: #3EC2E2;
    }

    .textbox {
        height: 60px;
        width: 400px;
        font-size: 35pt;
        text-align: center;
        margin-top: 20px;
        margin-bottom: 20px;
        border: 2px solid black;
    }

    .knop {
        background-color: #cccccc;
        width: 190px;
        border: 1px solid black;
        color: white ;
        text-align: center;
        text-decoration: none;
        font-size: 30px;
        display: inline-block;
        position: relative;
        margin-bottom: 10px;
        height: 55px;
    }
}
@media only screen and (min-width: 768px) {
   
}