:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --page-background-color: #111111;
}

body{
    /*center whole body start*/
    display: flex;
    justify-content: center; /* Center horizontally */
    align-items: center; /* Center vertically */
    height: 100vh;
    margin: 0;
    /*center whole body end*/
}

.pageMainWindow{
    /*display: none;/
    height: 95vh;
    width: 95vw;*/
    padding:2vw;
    background-color: var(--page-background-color);
    border-radius: 2vw;
}