html, body {
    height: 100%;
    overflow: hidden; /* Prevent body scroll */
    display: flex;
    flex-direction: column;
}
body{
    margin-bottom:0px;
}

#maindiv, main{
    height: 100%;
    overflow: hidden;
    padding: 0 !important; /* Force remove padding */
    margin: 0 !important;
}