fleet/frontend/components/buttons/Button/_styles.scss

$base-class: "button";

@mixin button-focus-outline($offset: 2px) {
  outline-color: $core-focused-outline;
  outline-offset: $offset;
  outline-style: solid;
  outline-width: 1px;
}

// Buttons with background colors
@mixin button-pad-8px-16px {
  padding: $pad-small $pad-medium;
  height: 36px;
}

// Buttons without background colors
@mixin button-pad-8px-8px {
  padding: $pad-small $pad-small;
  height: 36px;
}

// Size small buttons (with and without background colors)
@mixin button-pad-4px-8px {
  padding: $pad-xsmall $pad-small;
  height: 24px;
}

@mixin button-variant($color, $hover: null, $active: null, $inverse: false) {
  background-color: $color;

  @if $inverse {
    @include button-pad-8px-8px;

    &__small {
      @include button-pad-4px-8px;
    }

    &:hover {
      background-color: rgba($core-fleet-black, 0.05);

      &:active {
        background-color: $ui-fleet-black-5;
      }
    }

    &:focus-visible {
      // need a slightly larger focus outline to accomodate the :after content box
      // that correctly displays the border. We chose this approach as adding a
      // border to the button caused the button to jump around on the screen
      // when it was added and removed.
      @include button-focus-outline($offset: 3px);
      &::after {
        content: "";
        width: 100%;
        height: 100%;
        position: absolute;
        border: 1px solid $core-focused-outline;
        border-radius: 6px;
      }
    }
  } @else {
    &:hover:not(.button--disabled) {
      background-color: $hover;

      &:active {
        background-color: $active;
      }
    }

    &:focus-visible {
      @include button-focus-outline();
    }
  }
}

.#{$base-class} {
  @include button-variant($core-fleet-green);
  @include button-pad-8px-16px;
  transition: color 150ms ease-in-out, background 150ms ease-in-out,
    top 50ms ease-in-out, box-shadow 50ms ease-in-out, border 50ms ease-in-out;
  position: relative;
  color: $core-fleet-white;
  text-decoration: none;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  border-radius: 6px;
  font-size: $x-small;
  font-family: "Inter", sans-serif;
  font-weight: $bold;
  display: inline-flex;
  top: 0;
  border: 0;
  position: relative;
  cursor: pointer;

  &:focus {
    outline: none;
  }

  .transparent-text {
    opacity: 0;
  }

  .children-wrapper {
    display: flex;
    flex-direction: row;
    align-items: center;
  }

  &--default {
    @include button-variant(
      $core-fleet-green,
      $core-fleet-green-over,
      $core-fleet-green-down
    );
    display: flex;
    text-wrap: nowrap;
  }

  &--success {
    @include button-variant($ui-success, $ui-success-over, $ui-success-down);
    display: flex;
    text-wrap: nowrap;
  }

  &--alert {
    @include button-variant(
      $core-vibrant-red,
      $core-vibrant-red-over,
      $core-vibrant-red-down
    );
    display: flex;

    .loading-spinner {
      &__ring {
        div {
          border-color: $ui-error transparent transparent transparent;
        }
      }
    }
  }

  &--pill {
    @include button-variant(
      $ui-off-white,
      $core-vibrant-blue-over,
      null,
      $inverse: true
    );
    color: $core-fleet-green;
    border: 1px solid $core-fleet-green;
    box-sizing: border-box;
    font-size: $xx-small;
    padding: $pad-xsmall 10px;
    height: 24px;
    white-space: nowrap;

    &:active {
      box-shadow: inset 2px 2px 2px rgba(0, 0, 0, 0.25);
    }

    &:hover,
    &:focus {
      border: 1px solid $core-fleet-green;
    }
  }

  &--text-link {
    @include button-variant(transparent);
    border: 0;
    box-shadow: none;
    color: $ui-fleet-black-75;
    font-size: $x-small;
    cursor: pointer;
    margin: 0;
    padding: 0;
    height: auto;
    line-height: normal;
    text-align: left;

    &:focus {
      outline: none;
    }

    &:hover,
    &:focus {
      color: $ui-fleet-black-75-over;
      background-color: transparent;
      box-shadow: none;
      text-decoration: underline;
    }

    &:active {
      color: $ui-fleet-black-75-down;
      box-shadow: none;
      top: 0;
    }

    &.light-text {
      font-weight: $regular;
    }
  }

  &--text-link-dark {
    @include button-variant(transparent);
    border: 0;
    box-shadow: none;
    color: $core-fleet-black;
    font-size: $x-small;
    cursor: pointer;
    margin: 0;
    padding: 0;
    height: auto;
    line-height: normal;
    text-align: left;

    &:focus {
      outline: none;
    }

    &:hover,
    &:focus {
      background-color: transparent;
      box-shadow: none;
      text-decoration: underline;
    }

    &:active {
      box-shadow: none;
      top: 0;
    }
  }

  // &--icon is used for svg icon buttons without text
  &--text-icon,
  &--icon {
    @include button-variant(
      $core-fleet-white,
      $core-fleet-green-over,
      $core-fleet-green-down,
      $inverse: true
    );
    background-color: transparent;
    padding: 0;
    border: 0;
    box-shadow: none;
    color: $ui-fleet-black-75;
    font-size: $x-small;
    font-weight: $bold;
    cursor: pointer;
    white-space: nowrap;

    img {
      transform: scale(0.5);
    }

    &:focus {
      outline: none;
    }

    &:focus-visible {
      @include button-focus-outline();

      &::after {
        content: "";
        width: 100%;
        height: 100%;
        position: absolute;
        border: 1px solid $ui-fleet-black-75;
        border-radius: 6px;
      }
    }

    &:hover,
    &:focus {
      color: $ui-fleet-black-75-over;

      svg {
        path {
          fill: $ui-fleet-black-75-over;
        }
      }

      &:active {
        color: $ui-fleet-black-75-down;

        svg {
          path {
            fill: $ui-fleet-black-75-down;
          }
        }
      }

      // If .button--icon-stroke is present, use stroke instead of fill
      // Some SVG icons in these buttons contain a `stroke` instead of a `fill`,
      // so we need to modify that property instead. Adding a custom `fill`
      // could make these icons render incorrectly.
      &.button--icon-stroke {
        &:hover,
        &:focus {
          svg {
            path {
              fill: none; // Prevent fill from interfering
              stroke: $ui-fleet-black-75-over;
            }
          }
          &:active {
            svg {
              path {
                stroke: $ui-fleet-black-75-down;
              }
            }
          }
        }
      }
    }

    // globally styled gap between text and icon
    .children-wrapper {
      gap: $pad-small;
    }
  }

  // Used for primary buttons with green icon and green text, no underline on hover
  &--brand-inverse-icon {
    @include button-variant(transparent);
    @include button-pad-8px-8px;
    border: 0;
    box-shadow: none;
    color: $core-fleet-green;
    font-size: $x-small;
    font-weight: $bold;
    cursor: pointer;
    white-space: nowrap;

    &__small {
      @include button-pad-4px-8px;
    }

    img {
      transform: scale(0.5);
    }

    &:focus {
      outline: none;
    }

    &:focus-visible {
      @include button-focus-outline();

      &::after {
        content: "";
        width: 100%;
        height: 100%;
        position: absolute;
        border: 1px solid $ui-fleet-black-75;
        border-radius: 6px;
      }
    }

    &:hover,
    &:focus {
      background-color: rgba($core-fleet-black, 0.05);
      color: $core-fleet-green-over;

      svg {
        path {
          fill: $core-fleet-green-over;
        }
      }

      &:active {
        color: $core-fleet-green-down;

        svg {
          path {
            fill: $core-fleet-green-down;
          }
        }
      }
    }
    // If .button--icon-stroke is present, use stroke instead of fill
    // Some SVG icons in these buttons contain a `stroke` instead of a `fill`,
    // so we need to modify that property instead. Adding a custom `fill`
    // could make these icons render incorrectly.
    &.button--icon-stroke {
      &:hover,
      &:focus {
        svg {
          path {
            fill: none; // Prevent fill from interfering
            stroke: $core-fleet-green-over;
          }
        }
        &:active {
          svg {
            path {
              stroke: $core-fleet-green-over;
            }
          }
        }
      }
    }

    // globally styled gap between text and icon
    .children-wrapper {
      gap: $pad-small;
    }
  }

  &--icon {
    @include button-variant(
      $core-fleet-white,
      $core-fleet-green-over,
      $core-fleet-green-down,
      $inverse: true
    );
    background-color: transparent;
  }

  &--inverse {
    @include button-variant(
      $core-fleet-white,
      $core-fleet-green-over,
      $core-fleet-green-down,
      $inverse: true
    );
    background-color: transparent;
    color: $ui-fleet-black-75;
    box-sizing: border-box;

    .children-wrapper {
      gap: $pad-small; // For icons next to text like Pagination buttons
    }
  }

  &--inverse-alert {
    @include button-variant(
      $core-fleet-white,
      $core-vibrant-red-over,
      $core-vibrant-red-down,
      $inverse: true
    );
    color: $core-vibrant-red;
    box-sizing: border-box;
  }

  &--disabled {
    @include disabled;
  }

  &--unstyled {
    @include button-variant(transparent);
    border: 0;
    box-shadow: none;
    color: $core-fleet-black;
    cursor: pointer;
    margin: 0;
    padding: 0;
    height: auto;
    line-height: normal;
    font-weight: normal;

    &:active {
      box-shadow: none;
      top: 0;
    }
  }

  &--unstyled-modal-query {
    @include button-variant(transparent);
    border: 0;
    box-shadow: none;
    color: $core-fleet-black;
    cursor: pointer;
    margin: 0;
    padding: 15px 12px;
    height: auto;
    line-height: normal;
    display: block;
    width: 100%;
    border-radius: 0px;
    border-bottom: 1px solid $ui-fleet-black-10;

    &:active {
      box-shadow: none;
      top: 0;
    }

    &:focus {
      outline: none;
    }

    &:hover,
    &:focus {
      background-color: $ui-fleet-black-5;
      box-shadow: none;
    }

    .children-wrapper {
      display: flex;
      width: 100%;
      flex-direction: column;
      gap: $pad-xsmall;
      align-items: flex-start;

      .info {
        &__header {
          display: block;
          text-align: left;
        }
        &__data {
          display: block;
          width: 100%;
          font-weight: normal;
          text-align: left;
        }
      }
    }
  }

  &--oversized {
    background-color: $core-fleet-black;
    padding: $pad-large $pad-small;
    font-size: $medium;
    width: 100%;
  }

  // Designed to offset padding for text to justify left of parent component
  &.button--justify-left {
    left: -$pad-small;
    margin-right: -$pad-small;
  }

  // Designed to offset padding for text to justify right of parent component
  &.button--justify-right {
    right: -$pad-small;
    margin-left: -$pad-small;
  }
}