Exercise

Have a look at the CSS from our example page:

:root {
    --MainFont: "Helvetica Neue", Helvetica, Arial, sans-serif;
}
@font-face {
    font-family: "Inter-V";
    src: url("fonts/inter.var.woff2") format("woff2-variations");
    font-weight: 100 900;
    font-display: fallback;
    font-style: oblique 0deg 10deg;
}
body {
    background-color: var(--background);
    color: var(--foreground);
    transition: all 0.35s;
    font-size: 1.2em;
    font-family: "sans-serif";
    font-family: var(--MainFont);
    font-weight: 400;
}
@supports (font-variation-settings: "wdth" 200) {
    body {
        font-family: "Inter-V";
        font-variation-settings: "wght" 300, "slnt" -4;
        font-feature-settings: "cv08", "cv05";
    }
}

How much of that can you now understand? We have a system font stack, an @font-face rule loading a variable font (complete with...