html,body
{
width:100vw;
height:100vh;
overflow-x:hidden;
overflow-y:auto;
margin:0;
padding:0;
font-family:arial;
}

.content
{
    display: flex;
    align-content: center;
    justify-content: center;
    flex-direction: column;
    flex-wrap: nowrap;
    height: 100%;
    width: 100%;
    align-items: center;
}