@use '../utilities.scss' as utilities;

@mixin skipLink() {
  position: fixed;
  z-index: 9999;
  top: 5%;
  left: 40%;

  margin: 0;
  padding: 0.5rem 1rem;

  white-space: nowrap;

  font-size: var(--font-size-basis);
  color: var(--token-color-text-action);
  text-decoration: none;
  text-align: center;

  user-select: none;

  /* stylelint-disable-next-line */
  -webkit-user-select: none; // Safari / Touch fix

  outline: none;

  background-color: transparent;
  border-radius: 0;
  border: none;
  box-shadow: none;

  --skip-link-border-width--default: 0.0625rem;
  --skip-link-border-width--hover: 0.125rem;
  --skip-link-border-width--focus: var(--focus-ring-width);
  --skip-link-overlay-bg: rgba(255 255 255 / 85%);
  .eufemia-theme__color-scheme--dark & {
    --skip-link-overlay-bg: rgba(20 20 20 / 85%);
  }

  &::after {
    content: '';
    position: absolute;
    z-index: -2;
    left: -200vw;
    top: -200vh;
    width: 150vw;
    height: 150vh;

    background-color: var(--skip-link-overlay-bg);
    box-shadow: 150vw 150vh 0 0 var(--skip-link-overlay-bg); // Use box-shadow to avoid a horizontal scrollbar
  }

  &::before {
    content: '';
    position: absolute;
    z-index: -1;
    inset: 0;

    border-radius: var(--token-radius-xl);
    background-color: var(--token-color-background-neutral);

    @include utilities.fakeBorder(
      var(--token-color-stroke-action),
      var(--skip-link-border-width--default)
    );
  }

  &:hover::before {
    background-color: var(--token-color-background-action-hover-subtle);
    @include utilities.fakeBorder(
      var(--token-color-stroke-action-hover),
      var(--skip-link-border-width--hover)
    );
  }
  &:active::before {
    @include utilities.fakeBorder(
      var(--token-color-stroke-action-pressed)
    );
  }

  // Focus styles
  &:focus-visible {
    color: var(--token-color-text-action-focus);
  }
  &:focus-visible::before {
    background-color: var(--token-color-background-action-focus-subtle);
  }
  &:focus-visible:not(:active)::before {
    @include utilities.whatInput('keyboard') {
      @include utilities.fakeBorder(
        var(--token-color-stroke-action-focus),
        var(--skip-link-border-width--focus)
      );
    }
  }
  &:focus {
    opacity: 1;
  }
}

// How to use the "skip-link":
// 1. Have this on the top of your app: <a class="dnb-skip-link dnb-button" href="#dnb-app-content">Skip to content</a>.
// 2. Place this id="dnb-app-content" on your main content container.
.dnb-skip-link {
  position: absolute;
  z-index: 0;
  top: -100vh;
  opacity: 0.3;
  transition: opacity 0.3s ease-out;
}
.dnb-skip-link--active,
.dnb-skip-link:focus {
  @include skipLink();
}
html[data-whatintent='touch'] .dnb-skip-link {
  display: none;
}