html {
    box-sizing: border-box;
    font-size : 16px; 
}

*, 
*:before, 
*after {
    box-sizing: inherit;
}

body, 
h1,
h2,
h3,
h4,
h5,
h6, 
p, 
ol, 
ul {
    margin: 0 ; 
    padding: 0 ; 
    font-weight: 0;
}

ol, 
ul {
    list-style: none;
}

img {
    max-width: 100%; 
    height: auto;
}