body,html,.pageContent,.pages {
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
}
h1,h2,h3,h4,h5,h6,p,span,div{
    margin: 0;
    padding: 0;
}
.pages {
    display: block;
    position: relative; 
    overflow: hidden;
}
.pageContent {
    width: 100%;
    height: 100%;
}
div.main {
    padding: 25px;
    display: flex;
    position: absolute;
    z-index: 100;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-between;
    width: calc(100% - 50px);
    height: calc(100% - 50px);
}