.clearfix::after,.clearfix::before{
    clear: both;
    display: table;
    content: '';
}
*{
    padding: 0;
    margin: 0;
}
:root{
    font-size: 25px;
    letter-spacing: 1px;
    font-family:Verdana, Geneva, Tahoma, sans-serif  
}
body{
    height: 100vh;
    overflow: hidden;
}