html,
body {
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
}

* {
    font-size: 1em;
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

html {
    font-size: 16px;
    font-family: 'Roboto', sans-serif;
}

body {
    font-size: 62.5%;

    background-image: url(../img/city.jpg);
    background-color: #000;
    background-repeat: no-repeat;
    background-position: center center;
}