notifications-admin/app/assets/sass/uswds/components/_textbox-highlight.scss

@use 'uswds-core' as *;
@use 'settings/tokens' as *;

.textbox-highlight {
  &-wrapper {
    position: relative;
  }

  &-textbox {
    resize: none;
    z-index: 20;
    background: none;
  }

  &-textbox,
  &-background,
  &-foreground,
  &-mask {
    font-size: units(2);
    display: block;
    box-sizing: border-box;
    position: relative;
    padding: 4px;
    overflow: hidden;
    line-height: 1.6;
  }

  &-background {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    color: transparent;
    white-space: pre-wrap;
    overflow-wrap: break-word;
    word-wrap: break-word;
    border: 2px solid transparent;
    padding-bottom: units(3);
    z-index: 10;

    @media (-ms-high-contrast: active), (forced-colors: active) {
      border-color: Canvas;
    }

    .placeholder,
    .placeholder-conditional {
      background-color: #fff;
      position: relative;

      &:after {
        content: '';
        background-color: $color-placeholder-highlight;
        border: 1px solid $color-placeholder-highlight;
        display: block;
        position: absolute;
        top: 0;
        left: 5px;
        right: 6px;
        height: 100%;
        border-radius: 7px;
      }
    }
  }
}

.textbox-highlight-background,
.textbox-highlight-foreground,
.textbox-highlight-mask,
.textbox-highlight-textbox {
  font-size: units(2);
  line-height: 1.2;
  padding: units(1);
  font-family: family('sans');
}

.placeholder,
.placeholder-conditional {
  background-color: $color-placeholder-highlight;
  border: 1px solid $color-placeholder-highlight;
  border-radius: 7px;
  padding: 0 units(0.5);
}

.textbox-help-link {
  margin: 10px 0 0 0;
}

.textbox-right-aligned {
  text-align: right;
}