h1 {
  @include z-index(feet);
  @include font-size(h1);
  @include margin(a 0, b 1);
}

h2 {
  @include font-size(h2);
  @include margin(a 0, b 1);
}

h3 {
  @include font-size(h3);
  @include margin(a 0, b 1);
}

h4 {
  @include font-size(h4);
  @include margin(a 0, b 1);
}

h5 {
  @include font-size(h5);
  @include margin(a 0, b 1);
}

h6 {
  @include font-size(h6);
  @include margin(a 0, b 1);
}