Responsive font size in CSS

Question

I\'ve created a site using the Zurb Foundation 3 grid. Each page has a large h1:

Answer 1

I use these CSS classes, and they make my text fluid on any screen size:

.h1-fluid {
    font-size: calc(1rem + 3vw);
    line-height: calc(1.4rem + 4.8vw);
}

.h2-fluid {
    font-size: calc(1rem + 2vw);
    line-height: calc(1.4rem + 2.4vw);
}

.h3-fluid {
    font-size: calc(1rem + 1vw);
    line-height: calc(1.4rem + 1.2vw);
}

.p-fluid {
    font-size: calc(1rem + 0.5vw);
    line-height: calc(1.4rem + 0.6vw);
}