*{  
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
header a{
    display: block;
    font-size: 2em;
    margin: 20px;
    padding-top: 7px;
}
body{
    font-size: 16px;
    font-family: Arial sans-serif;
    /* background: -webkit-linear-gradient(top, #3977e996, #1a18bd9a, #0e6ae4b0); */
    

}
.cards{
    margin: 0 20%;
    display: flex;
    flex-flow: column wrap;

}
.cardt{
    margin: 3% 25%;
    width: 700px;
    text-align: center;
    font-weight: bold;
    /* background: -webkit-linear-gradient(top, #f5f5f5, #0905f5, #f5f5f5); */
    border-radius: 20px;
    padding: 0 0px;
    justify-content: space-between;
}
.slogan{
    position: relative;
    color: rgb(7, 0, 0);
    font-size: 30px;
    text-shadow: #0381ff 2px 2px 9px;
    top: 45%;
    text-align: center;
}
.card div {
    text-align: center;
    font-weight: bold;
    background: -webkit-linear-gradient(top, #f5f5f5, #403eb3, #f5f5f5);
    border-radius: 20px;
    padding: 0 0px;
}

 .bil{
    box-shadow: 3px 9px 29px 0  rgba(52,73,94,  0.849);
    width: 800px;
    height: auto;
    margin-top: 20px;
}

 .img{
    box-shadow: 3px 9px 29px 0  rgba(52,73,94,  0.849);
    margin: 40px;
    width: auto;
    height: 550px;}


    .cer{
        position: relative;
        padding-bottom: 56.25%;
        height: 0;
        overflow: hidden;}



@media (max-width:600px){

    .img{
        box-shadow: 3px 9px 29px 0  rgba(52,73,94,  0.849);
        /* margin: 40px; */
        width: 300px;
        height: auto;}

    .bil{
        box-shadow: 3px 9px 29px 0  rgba(52,73,94,  0.849);
        width: 300px;
        height: auto;
        margin-top: 20px;
    }
    .cardt{
        margin: 3% 25%;
        width: auto;
        text-align: center;
        font-weight: bold;
        border-radius: 20px;
        padding: 0 0px;
        justify-content: space-between;
    }

    }