decide.nolog.cz/app/styles/_calendar.scss

@import "ember-power-calendar";

@media only screen and (max-width: $screen-sm-min) {
  .ember-power-calendar {
    @include ember-power-calendar($cell-size: 63px);
  }
}

@media only screen and (min-width: $screen-sm-min) {
  .ember-power-calendar {
    @include ember-power-calendar($cell-size: 47px);

    float:left;

    &:first-child {
      margin-right: 10px;
    }
  }

  .ember-power-calendar ~ .help-block {
    clear: both;
  }
}

@media only screen and (min-width: $screen-md-min) {
  .ember-power-calendar {
    @include ember-power-calendar($cell-size: 40px);
  }
}

@media only screen and (min-width: $screen-lg-min) {
  .ember-power-calendar {
    @include ember-power-calendar($cell-size: 50px);
  }
}