html, body {
    height: 100vh;
    margin: 0;
    overflow: hidden;
}


body {
    display: grid;
    grid-template-rows: repeat(7, 1fr);
    grid-template-columns: repeat(7, 1fr);
    box-sizing: border-box;
    background-color:#333  ;
    max-width: 100%;
    
     }