message: refactor(docs-infra): move `.filter-button` styles inside `.group-buttons`
  Since `.filter-button` elements only appear inside `.group-buttons`
  elements, this commit moves `.filter-button` CSS styles inside
  `.group-buttons` styles.
  PR Close
diff: @@ -4,8 +4,10 @@ button {
  font-family: inherit;
  }
  -.button,
  -a.button.mat-button {
  +// This rule overrides some Angular Material styles defined for `.mat-button`
  +// (hence we include `.mat-button` in the selector).
  +a.button.mat-button,
  +.button {
  display: inline-block;
  @include line-height(32);
  padding: 0px 16px;
  @@ -87,7 +89,13 @@ a.button.mat-button {
  }
  }
  -a.filter-button {
  +
  +.group-buttons {
  + margin: 32px auto;
  +
  + // This rule overrides some Angular Material styles defined for `.mat-button`
  + // (hence we include `.mat-button` in the selector).
  + a.button.mat-button.filter-button {
  width: 140px;
  @include font-size(14);
  padding: 0px 16px;
  @@ -96,22 +104,13 @@ a.filter-button {
  border: 2px solid $blue;
  border-radius: 4px;
  + &.selected,
  &:hover {
  background-color: $blue;
  color: $white;
  }
  -}
  -
  -.group-buttons {
  - margin: 32px auto;
  -
  - a.selected {
  - background-color: $blue;
  - color: $white;
  - }
  @media (max-width: 480px) {
  - .filter-button.button {
  font-size: 1.2rem;
  padding: 0;
  margin: 0;
  