/*! formstone v2.1.6 [navigation.scss] 2025-09-18 | GPL-3.0 License | formstone.it */
$fs-navigation-offscreen-background: #fff;
$fs-navigation-offscreen-width: 80vw;
$fs-navigation-offscreen-zindex: 0;

$fs-navigation-offscreen-duration: 0.2s;
$fs-navigation-offscreen-timing: ease;

$fs-navigation-overlay-zindex: 3;

$fs-navigation-overlay-content-background: rgba(0, 0, 0, 0.8);
$fs-navigation-overlay-content-zindex: 2;

$fs-navigation-push-zindex: 0;
$fs-navigation-push-content-zindex: 1;

.fs-navigation {
  box-sizing: border-box;

  &,
  &-content {
    --fs-navigation-offscreen-background: $fs-navigation-offscreen-background;
    --fs-navigation-offscreen-width: $fs-navigation-offscreen-width;
    --fs-navigation-offscreen-zindex: $fs-navigation-offscreen-zindex;

    --fs-navigation-offscreen-duration: $fs-navigation-offscreen-duration;
    --fs-navigation-offscreen-timing: $fs-navigation-offscreen-timing;

    --fs-navigation-overlay-zindex: $fs-navigation-overlay-zindex;

    --fs-navigation-overlay-content-background: $fs-navigation-overlay-content-background;
    --fs-navigation-overlay-content-zindex: $fs-navigation-overlay-content-zindex;

    --fs-navigation-push-zindex: $fs-navigation-push-zindex;
    --fs-navigation-push-content-zindex: $fs-navigation-push-content-zindex;

    @media (prefers-reduced-motion) {

      & {
        --fs-navigation-offscreen-duration: 0s;
      }
    }
  }

  // Toggle

  &-toggle-nav &-enabled:not(&-open) {
    display: none;
  }

  &-toggle-nav &-open {
    // display: block;
  }

  &-toggle-handle &-enabled {
    width: 100%;

    cursor: pointer;
    display: block;
  }

  &-toggle-handle &-open {}

  // Overlay

  &-push-nav &-enabled,
  &-reveal-nav &-enabled,
  &-overlay-nav &-enabled {
    width: var(--fs-navigation-offscreen-width);
    height: calc(100% + 60px); // ??

    position: fixed;
    top: 0;

    background: var(--fs-navigation-offscreen-background);
    display: block;
    overflow-y: scroll;
    visibility: hidden;

    overscroll-behavior: contain;
  }

  //

  &-reveal-nav &-animated {
    transition: visibility 0.001s linear var(--fs-navigation-offscreen-duration);
  }

  &-push-nav &-animated,
  &-overlay-nav &-animated {
    transition:
      transform var(--fs-navigation-offscreen-duration) var(--fs-navigation-offscreen-timing),
      visibility 0.001s linear var(--fs-navigation-offscreen-duration);
  }

  // reveal / push / overlay

  &-push-nav &-enabled,
  &-reveal-nav &-enabled {
    z-index: var(--fs-navigation-push-zindex);
  }

  &-push-left-nav &-enabled,
  &-reveal-left-nav &-enabled,
  &-overlay-left-nav &-enabled {
    left: 0;
  }

  &-push-right-nav &-enabled,
  &-reveal-right-nav &-enabled,
  &-overlay-right-nav &-enabled {
    right: 0;
  }

  // reveal



  // push / overlay

  &-push-left-nav &-enabled,
  &-overlay-left-nav &-enabled {
    transform: translate3d(calc(var(--fs-navigation-offscreen-width) * -1), 0, 0);
  }

  &-push-right-nav &-enabled,
  &-overlay-right-nav &-enabled {
    transform: translate3d(var(--fs-navigation-offscreen-width), 0, 0);
  }

  // overlay

  &-overlay-nav &-enabled {
    z-index: var(--fs-navigation-overlay-zindex);
  }

  &-overlay-left-nav &-enabled {}

  &-overlay-right-nav &-enabled {}

  // open

  &-reveal-nav &-open {
    visibility: visible;
    transition: visibility 0.001s linear;
  }

  &-push-nav &-open,
  &-overlay-nav &-open {
    transform: translate3d(0, 0, 0);
    transition:
      transform var(--fs-navigation-offscreen-duration) var(--fs-navigation-offscreen-timing),
      visibility 0.001s linear;
    visibility: visible;
  }

  &-push-handle &-enabled,
  &-overlay-handle &-enabled {
    // @include fs_button;

    cursor: pointer;
    display: block;
  }

  &-overlay-content:before {
    width: 100%;
    height: 100%;
    height: unquote("calc(100% + 60px)");

    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: var(--fs-navigation-overlay-content-zindex);

    background: var(--fs-navigation-overlay-content-background);
    content: '';
    display: block;
    opacity: 0;
    overflow-y: scroll;
    overscroll-behavior: contain;
    transition:
      background var(--fs-navigation-offscreen-duration) var(--fs-navigation-offscreen-timing),
      opacity var(--fs-navigation-offscreen-duration) var(--fs-navigation-offscreen-timing),
      visibility var(--fs-navigation-offscreen-duration) var(--fs-navigation-offscreen-timing);
    visibility: hidden;
  }

  &-overlay-content &-open:before {
    opacity: 1;
    visibility: visible;
  }

  &-reveal-content &-enabled,
  &-push-content &-enabled {
    position: relative;
    z-index: var(--fs-navigation-push-content-zindex);

    display: block;
    transform: translate3d(0, 0, 0);
  }

  &-reveal-content &-animated,
  &-push-content &-animated {
    transition:
      transform var(--fs-navigation-offscreen-duration) var(--fs-navigation-offscreen-timing);
  }

  &-reveal-left-content &-enabled,
  &-push-left-content &-enabled {}

  &-reveal-right-content &-enabled,
  &-push-right-content &-enabled {}

  // open

  &-reveal-left-content &-open,
  &-push-left-content &-open {
    transform: translate3d(var(--fs-navigation-offscreen-width), 0, 0);
  }

  &-reveal-right-content &-open,
  &-push-right-content &-open {
    transform: translate3d(calc(var(--fs-navigation-offscreen-width) * -1), 0, 0);
  }
}