html {
    font-size: 12px;
}

.container-fluid {
    min-width: 320px;
    max-width: 1920px;
    margin: 0 auto;
    overflow: hidden;
}

section > .inner, nav > .inner {
    margin: 0 auto;
    max-width: 1200px;
}

.head-box h4 {
    font-family: "Rubik Bold";
    text-transform: uppercase;
    font-size: 2.4rem;
}

@media only screen and (min-width: 640px) {
    html {
        font-size: 24px;
    }
}

@media only screen and (min-width: 960px) {
    html {
        font-size: 14px;
    }
}

@media only screen and (min-width: 1200px) {
    html {
        font-size: 18px;
    }
}