openproject/app/assets/stylesheets/content/_calendars.sass

// overrides for full-calendar so that it looks to belong into OpenProject
full-calendar
  .fc-toolbar
    .fc-button
      @extend .button
      height: 34px

      &.fc-today-button
        margin-right: 0
        margin-bottom: 0
        margin-left: 0.5rem

    // ensure to have higher specificity than above extend
    .fc-button-group
      .fc-button
        margin-right: 0
        margin-bottom: 0
        padding: 0.4em 0.65em

      .fc-button-active
        @extend .button.-active

  .fc-title
    max-width: 100%
    @include text-shortener(false)

  .fc-header-toolbar
    h2
      @extend h2
      font-size: 1.5rem