body {
    margin: 0;
    background-color: rgb(204, 204, 204);
    box-sizing: border-box;
    font-size: 10px;
}
.main{
    width: 90%;
    margin: 0 auto;
    background-color: #fff;
    padding: 1.5em;
    min-height: 100vh;
    box-sizing: border-box;
    box-shadow: 2px 7px 35px 0px rgba(0,0,0,0.75);
}
@media screen and (max-width: 440px) {
    body {
        font-size: 7px;
    }
    .main {
        width: 96%;
    }
}