/**/ 
html {font-size: 62.5%;} /* 1rem = 10px = 62.5% * 16px */
body {font-size: 1.6rem; margin: 0; min-height: 100vh; display: flex; flex-direction: column; font-family: "Ubuntu", sans-serif;
    background-color: #f5f5f5;} /* 16px */