* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: #fff;
    background: #333;
    overflow: hidden;
    min-width: 400px;
}

.landing {
    position: relative;
    background-image: url("../img/mm_background.png");
    background-size: cover;
    background-position: center;
    height: 100vh;
    width: 100vw;
}

@media(max-width:768px) {
    .landing {
        background-image: url("../img/mm_background.png");
    }
}