wagtail/client/scss/components/_button.scss

@use 'sass:color';
// Core button style
// Note that these styles include methods to render buttons the same x-browser, described here:
// http: //cbjdigital.com/blog/2010/08/bulletproof_css_input_button_heights
// input[type=submit],
// input[type=reset],
// input[type=button],
.button {
  border-radius: 3px;
  font-family: $font-sans;
  width: auto;
  height: 2.4em;
  padding: 0 1em;
  font-size: 0.9em;
  font-weight: normal;
  vertical-align: middle;
  display: inline-block;
  background-color: $color-button;
  border: 1px solid $color-button;
  color: $color-white;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  -webkit-font-smoothing: auto;
  // stylelint-disable-next-line property-no-vendor-prefix
  -moz-appearance: none;

  transition: background-color 0.1s ease;

  &:hover {
    color: $color-teal;
  }

  &.yes {
    background-color: $color-button-yes;
    border: 1px solid $color-button-yes;

    &.button-secondary {
      border: 1px solid $color-button-yes;
      color: $color-button-yes;
      background-color: transparent;
    }

    &:hover {
      color: $color-white;
      border-color: transparent;
      background-color: $color-button-yes;
    }
  }

  &.warning {
    background-color: $color-button-warning;
    border: 1px solid $color-button-warning;

    &.button-secondary {
      border: 1px solid $color-button-warning;
      color: $color-button-warning;
      background-color: transparent;
    }

    &:hover {
      color: $color-white;
      border-color: transparent;
      background-color: $color-button-warning;
    }
  }

  &.no,
  &.serious {
    background-color: $color-button-no;
    border: 1px solid $color-button-no;

    &.button-secondary {
      border: 1px solid $color-button-no;
      color: $color-button-no;
      background-color: transparent;
    }

    &:hover {
      color: $color-white;
      border-color: transparent;
      background-color: $color-button-no;
    }
  }

  &.bicolor {
    border: 1px solid transparent;
    padding-inline-start: 3.5em;

    &:before {
      // iconfont
      font-size: 1rem;
      position: absolute;
      inset-inline-start: 0;
      top: 0;
      width: 2em;
      line-height: 1.85em;
      height: 100%;
      text-align: center;
      background-color: theme('colors.black-20');
      display: block;
      // Remove once we drop support for Safari 14.
      // stylelint-disable-next-line property-disallowed-list
      border-top-left-radius: inherit;
      border-start-start-radius: inherit;
      // Remove once we drop support for Safari 14.
      // stylelint-disable-next-line property-disallowed-list
      border-bottom-left-radius: inherit;
      border-end-start-radius: inherit;
    }

    .icon-wrapper {
      background-color: theme('colors.black-20');
      display: flex;
      align-items: center;
      justify-content: center;
      position: absolute;
      inset-inline-start: 0;
      top: 0;
      width: 3em;
      height: 100%;
      box-sizing: content-box;
      text-align: center;
      // Remove once we drop support for Safari 14.
      // stylelint-disable-next-line property-disallowed-list
      border-top-left-radius: inherit;
      border-start-start-radius: inherit;
      // Remove once we drop support for Safari 14.
      // stylelint-disable-next-line property-disallowed-list
      border-bottom-left-radius: inherit;
      border-end-start-radius: inherit;
    }

    &.button--icon {
      &:before {
        display: none; // TODO: remove once the icon font styles are gone
      }
    }

    &.button--icon-flipped {
      .icon {
        transform: scaleX(-1);
      }
    }

    &.button-secondary {
      border: 1px solid theme('colors.black-20');
    }
  }

  &.button-small.bicolor {
    padding-inline-start: 3.5em;

    .icon-wrapper {
      width: 2em;
    }

    &.button--icon .icon {
      @include svg-icon(0.9rem);
      padding: 0.25em;
    }
  }

  // + input[type=submit],
  // + input[type=reset],
  // + input[type=button],
  + .button {
    // + button {
    margin-inline-start: 1em;
  }

  // A completely unstyled button
  &.unbutton {
    border-radius: 0;
    width: auto;
    height: auto;
    padding: 0;
    font-size: inherit;
    font-weight: normal;
    vertical-align: middle;
    display: inline;
    background-color: transparent;
    border: 0;
    color: inherit;
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    -webkit-font-smoothing: auto;
    // stylelint-disable-next-line property-no-vendor-prefix
    -moz-appearance: none;

    &:hover,
    &:focus,
    &:active {
      background-color: transparent;
    }
  }

  // stylelint-disable-next-line no-duplicate-selectors
  &:hover {
    background-color: $color-button-hover;
    color: $color-white;
    border-color: transparent;

    &.hover-no {
      background-color: $color-button-no;
    }
  }

  &.button-longrunning {
    span {
      // iconfont
      @include transition(all 0.3s ease);
      transform: scale(0.9);
      display: inline-block;
      height: 0.9em;
      position: relative;
      opacity: 0;
      width: 0;
      visibility: hidden;
      text-align: center;
      padding-inline-end: 0;
    }

    em {
      font-style: normal;
    }

    &-active {
      display: inline-flex;
      align-items: center;
    }

    &-active span {
      // iconfont
      transform: scale(1);
      visibility: visible;
      width: 1em;
      height: 1em;
      opacity: 0.8;
      padding-inline-end: 0.5em;
    }

    span.icon-spinner:after {
      // iconfont
      text-align: center;
      position: absolute;
      inset-inline-start: 0;
      margin: 0;
      line-height: 1em;
      display: inline-block;
      font-size: 1em;
    }

    svg.icon-spinner {
      @include transition(all 0.3s ease);
      display: none;
    }

    &-active svg.icon-spinner {
      @include svg-icon();
      display: inline-block;
      opacity: 0.8;
      padding: 0;
    }

    &-active .button-longrunning__icon {
      display: none;
    }
  }

  &:disabled,
  &[disabled],
  &.disabled {
    background-color: $color-grey-3;
    border-color: $color-grey-3;
    color: $color-grey-2;
    cursor: default;
    @media (forced-colors: active) {
      color: GrayText;
      border-color: GrayText;
      border-style: dashed;
    }
  }

  &.button-secondary:disabled,
  &.button-secondary[disabled],
  &.button-secondary.disabled {
    background-color: $color-white;
    border-color: $color-grey-3;
    color: $color-grey-3;
  }

  &.button-strokeonhover {
    border: 1px solid transparent;

    &:hover {
      border-color: $color-grey-2;
    }
  }

  &.button--icon {
    .icon {
      @include svg-icon(1.5em);
    }
  }

  @include media-breakpoint-up(sm) {
    font-size: 0.95em;
    padding: 0 1.4em;
    height: 3em;

    &.bicolor {
      padding-inline-start: 3.7em;

      &:before {
        width: 2em;
        line-height: 2.2em;
        font-size: 1.1rem;
      }
    }

    &.button-small.bicolor {
      // line-height: 2.2em;
      padding-inline-start: 3em;

      &:before {
        width: 1.8em;
        line-height: 1.65em;
      }
    }
  }
}

.button-small {
  padding: 0 0.8em;
  height: 2em;
  font-size: 0.95em;
}

.button-secondary {
  color: $color-button;
  background-color: transparent;
}

// Buttons which are only an icon
.button.icon.text-replace {
  // iconfont
  font-size: 0; // unavoidable duplication of setting in icons.scss
  width: 1.8rem;
  height: 1.8rem;
  box-sizing: content-box;

  &:before {
    line-height: 1.7em;
  }

  @include media-breakpoint-up(sm) {
    width: 2.2rem;
    height: 2.2rem;

    &:before {
      line-height: 2.1em;
    }

    &.button-small {
      height: 1.8rem;
      width: 1.8rem;

      &:before {
        line-height: 1.7em;
      }
    }
  }
}

.button--icon.text-replace {
  background-color: transparent;
  color: $color-grey-2;
  border-color: transparent;
  font-size: 0;
  text-align: center;

  &:hover {
    color: $color-grey-1;
  }

  .icon {
    font-size: initial;
    @include svg-icon(1rem, middle);
    padding: 0.5em;
    box-sizing: content-box;
  }

  &.button-small {
    line-height: 1.7rem;
    height: 1.8rem;
    width: 1.8rem;

    .icon {
      padding: 0.25em;
    }
  }

  @include media-breakpoint-up(sm) {
    width: 2.2rem;
    height: 2.2rem;
  }
}

button.button.bicolor .icon-wrapper {
  line-height: 1.65em; // work around differences in a and button elements
}

.button-neutral {
  color: $color-grey-2;

  &:hover {
    color: $color-teal;
  }
}

.yes {
  background-color: $color-button-yes;
  border: 1px solid $color-button-yes;

  &.button-secondary {
    border: 1px solid $color-button-yes;
    color: $color-button-yes;
    background-color: transparent;
  }

  &:hover {
    color: $color-white;
    border-color: transparent;
    background-color: $color-button-yes;
  }
}

.no,
.serious {
  background-color: $color-button-no;
  border: 1px solid $color-button-no;

  &.button-secondary {
    border: 1px solid $color-button-no;
    color: $color-button-no;
    background-color: transparent;
  }

  &:hover {
    color: $color-white;
    border-color: transparent;
    background-color: $color-button-no;
  }
}

.bicolor {
  border: 0;
  padding-inline-start: 3.5em;

  &:before {
    font-size: 1rem;
    position: absolute;
    inset-inline-start: 0;
    top: 0;
    width: 2em;
    line-height: 1.85em;
    height: 100%;
    text-align: center;
    background-color: theme('colors.black-20');
    display: block;
  }
}

.button-small.bicolor {
  padding-inline-start: 3.5em;

  &:before {
    width: 2em;
    font-size: 0.8rem;
    line-height: 1.65em;
  }
}

a.button {
  line-height: 2.4em;
  height: auto;

  &.button-small {
    line-height: 1.85em;
  }

  @include media-breakpoint-up(sm) {
    line-height: 2.9em;
  }
}

// Special styles to counteract Firefox's completely unwarranted assumptions about button styles
input[type='submit'],
input[type='reset'],
input[type='button'],
button {
  padding: 0 1em;

  @include media-breakpoint-up(sm) {
    &.button-small {
      height: 2em;
    }
  }
}