.fs-sm {
  @include ms-respond(font-size, -1);
  line-height: 1;
}

.fs-base {
  @include ms-respond(font-size, 0);
  line-height: 1.5;
}

.fs-md {
  @include ms-respond(font-size, 1);
  line-height: 1;
}

.fs-lg {
  @include ms-respond(font-size, 2);
  line-height: 1;
}

.fs-xl {
  @include ms-respond(font-size, 3);
  line-height: 1;
}

.fs-xxl {
  @include ms-respond(font-size, 4);
  line-height: 1;
}

.fs-xxxl {
  @include ms-respond(font-size, 5);
  line-height: 1;
}

.fs-4xl {
  @include ms-respond(font-size, 6);
  line-height: 1;
}