

                    <h2>Responsive Font Sizes</h2>
                    <div class="grid fr6 fr1-sm">
                        <div class="fs25-xl">.fs25-xl</div>
                        <div class="fs25-lg">.fs25-lg</div>
                        <div class="fs25-md">.fs25-md</div>
                        <div class="fs25-sm">.fs25-sm</div>
                        <div class="fs25-xs">.fs25-xs</div>
                        <div class="fs25-us">.fs25-us</div>
                    </div>
                </sect