qdouze2-wordpress-theme/scss/mixins/_btns.scss

@mixin button($size) {
  @include button-layout($size);
  @include shape-style($size);
  @include button-hover();
  font-weight: $fontweight_base;
}

@mixin button-layout($size) {
    padding: $size;
    padding-top: $size/3;
    padding-bottom: $size/3;
    margin:$size/2;
    margin-top: $size/3;
    margin-bottom: $lineheight;
    //font-size: 4.75mm;
    line-height:$lineheight;
    height:auto;
}

@mixin button-hover() {
  transition: background-color .2s, border .2s, box-shadow .2s, color .2s;
  &:hover, &:active {
      background-color:transparent;
  }
}

@mixin button-fullcontrol($background-color, $hover-color, $text-color) {
    @include colorize-shape($background-color);
    outline-color: $background-color;
    color:$text-color;
    &:visited {
      @include colorize-shape($background-color);
      color:$text-color;
    }
    &, &:visited, &:not(.disabled):not(:disabled) {
        &:hover, &:active {
          @include colorize-shape($hover-color);
          color:lighten($text-color, 5%);
          outline-color: $hover-color;
        }
    }
}

@mixin button-color($background-color) {
    @include button-fullcontrol($background-color, mix($background-color, getTextColorFromBackground($background-color), 85%), getTextColorFromBackground($background-color));
    box-shadow: $narrow-shadow;
}