set default rem css
/* Document level adjustments */
html {
font-size: 17px;
}
@media (max-width: 900px) {
html { font-size: 15px; }
}
@media (max-width: 400px) {
html { font-size: 13px; }
}
/* Type will scale with document */
h1 {
font-size: 3rem;
}
h2 {
font-size: 2.5rem;
}
h3 {
font-size: 2rem;
}