/*! formstone v2.3.0 [lightbox.scss] 2026-10-14 | GPL-3.0 License | formstone.dev */
// Variables

$fs-lightbox-mobile-max-width: 739px !default;
$fs-lightbox-duration: 0.25s !default;
$fs-lightbox-timing: linear !default;
$fs-lightbox-overlay-bg: rgba(0, 0, 0, 0.9) !default;
$fs-lightbox-loading-color: #fff !default;
$fs-lightbox-loading-size: 40px !default;
$fs-lightbox-loading-spread: 5px !default;
$fs-lightbox-loading-duration: 0.75s !default;
$fs-lightbox-item-duration: 0.25s !default;
$fs-lightbox-item-timing: ease !default;
$fs-lightbox-zoom-duration: 0.25s !default;
$fs-lightbox-details-bg: rgba(0, 0, 0, 0.6) !default;
$fs-lightbox-details-color: #fff !default;
$fs-lightbox-details-font: 16px / 1.4 sans-serif !default;
$fs-lightbox-details-padding: calc(env(safe-area-inset-top, 0px) + 40px) calc(env(safe-area-inset-right, 0px) + 60px) calc(env(safe-area-inset-bottom, 0px) + 40px) calc(env(safe-area-inset-left, 0px) + 60px) !default;
$fs-lightbox-details-gap: 10px !default;
$fs-lightbox-button-background: rgba(0, 0, 0, 0.8) !default;
$fs-lightbox-button-color: #fff !default;

/**
 * @module Lightbox
 * @description Accessible lightbox for images, videos, and elements
 */
/**
 * LESS Variables
 * @type {number}
 * @default 739px
 * @description Maximum viewport width considered mobile (affects button positioning)
 */
/**
 * @type {number}
 * @default 0.25s
 * @description Lightbox open/close transition duration
 */
/**
 * @type {string}
 * @default linear
 * @description Lightbox open/close transition timing function
 */
/**
 * @type {color}
 * @default rgba(0, 0, 0, 0.9)
 * @description Dialog backdrop overlay color
 */
/**
 * @type {color}
 * @default #fff
 * @description Loading spinner color
 */
/**
 * @type {number}
 * @default 40px
 * @description Loading spinner diameter
 */
/**
 * @type {number}
 * @default 5px
 * @description Loading spinner border thickness
 */
/**
 * @type {number}
 * @default 0.75s
 * @description Loading spinner rotation animation duration
 */
/**
 * @type {number}
 * @default 0.25s
 * @description Item transition duration when switching between gallery items
 */
/**
 * @type {string}
 * @default ease
 * @description Item transition timing function
 */
/**
 * @type {number}
 * @default 0.25s
 * @description Image zoom transition duration (buttons, keys and double-tap; gestures follow the pointer)
 */
/**
 * @type {color}
 * @default rgba(0, 0, 0, 0.6)
 * @description Details area (caption/ordinal) background color
 */
/**
 * @type {color}
 * @default #fff
 * @description Details area text color
 */
/**
 * @type {string}
 * @default 16px / 1.4 sans-serif
 * @description Details area font stack (size, line-height, family)
 */
/**
 * @type {string}
 * @default ...
 * @description Details area padding with safe area insets for notched devices
 */
/**
 * @type {number}
 * @default 10px
 * @description Gap between caption and ordinal in details area
 */
/**
 * @type {color}
 * @default rgba(0, 0, 0, 0.8)
 * @description Control button (close, next, previous) background color
 */
/**
 * @type {color}
 * @default #fff
 * @description Control button icon/text color
 */
/**
 * Locks background scrolling while a lightbox is open
 * @selector html:has(.fs-lightbox[open])
 */
html:has(.fs-lightbox[open]) {
  overflow: hidden;
}

/**
 * @selector .fs-lightbox
 * @description Main lightbox dialog element. Uses native HTML dialog with custom properties
 * for theming. Supports @starting-style for entry animations and respects prefers-reduced-motion.
 */
.fs-lightbox {
  /**
   * CSS Custom Properties - Timing
   * Override these properties to customize lightbox animation timing
   */
  /** @property {time} --fs-lightbox-duration - Lightbox open/close transition duration */
  --fs-lightbox-duration: #{$fs-lightbox-duration};
  /** @property {keyword} --fs-lightbox-timing - Lightbox open/close transition timing function */
  --fs-lightbox-timing: #{$fs-lightbox-timing};
  /**
   * CSS Custom Properties - Overlay
   */
  /** @property {color} --fs-lightbox-overlay-bg - Dialog backdrop overlay color */
  --fs-lightbox-overlay-bg: #{$fs-lightbox-overlay-bg};
  /**
   * CSS Custom Properties - Loading Spinner
   */
  /** @property {color} --fs-lightbox-loading-color - Loading spinner color */
  --fs-lightbox-loading-color: #{$fs-lightbox-loading-color};
  /** @property {length} --fs-lightbox-loading-size - Loading spinner diameter */
  --fs-lightbox-loading-size: #{$fs-lightbox-loading-size};
  /** @property {length} --fs-lightbox-loading-spread - Loading spinner border thickness */
  --fs-lightbox-loading-spread: #{$fs-lightbox-loading-spread};
  /** @property {time} --fs-lightbox-loading-duration - Loading spinner rotation animation duration */
  --fs-lightbox-loading-duration: #{$fs-lightbox-loading-duration};
  /**
   * CSS Custom Properties - Gallery Items
   */
  /** @property {time} --fs-lightbox-item-duration - Item transition duration when switching between gallery items */
  --fs-lightbox-item-duration: #{$fs-lightbox-item-duration};
  /** @property {keyword} --fs-lightbox-item-timing - Item transition timing function */
  --fs-lightbox-item-timing: #{$fs-lightbox-item-timing};
  /** @property {time} --fs-lightbox-zoom-duration - Image zoom transition duration */
  --fs-lightbox-zoom-duration: #{$fs-lightbox-zoom-duration};
  /**
   * CSS Custom Properties - Details Area (Caption/Ordinal)
   */
  /** @property {color} --fs-lightbox-details-bg - Details area background color (gradient start) */
  --fs-lightbox-details-bg: #{$fs-lightbox-details-bg};
  /** @property {color} --fs-lightbox-details-color - Details area text color */
  --fs-lightbox-details-color: #{$fs-lightbox-details-color};
  /** @property {font} --fs-lightbox-details-font - Details area font stack (size, line-height, family) */
  --fs-lightbox-details-font: #{$fs-lightbox-details-font};
  /** @property {length} --fs-lightbox-details-padding - Details area padding with safe area insets */
  --fs-lightbox-details-padding: #{$fs-lightbox-details-padding};
  /** @property {length} --fs-lightbox-details-gap - Gap between caption and ordinal in details area */
  --fs-lightbox-details-gap: #{$fs-lightbox-details-gap};
  /**
   * CSS Custom Properties - Control Buttons (Close, Previous, Next)
   */
  /** @property {color} --fs-lightbox-button-background - Control button background color */
  --fs-lightbox-button-background: #{$fs-lightbox-button-background};
  /** @property {color} --fs-lightbox-button-color - Control button icon/text color */
  --fs-lightbox-button-color: #{$fs-lightbox-button-color};
  /**
   * Accessibility - Reduced Motion
   * Disables all animations when user prefers reduced motion
   */
  height: 100vh;
  width: 100vw;
  max-height: 100vh;
  max-width: 100vw;
  position: fixed;
  inset: 0;
  background: transparent;
  border: none;
  margin: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0;
  transition: display var(--fs-lightbox-duration) var(--fs-lightbox-timing) allow-discrete, opacity var(--fs-lightbox-duration) var(--fs-lightbox-timing), overlay var(--fs-lightbox-duration) var(--fs-lightbox-timing) allow-discrete;

  @starting-style {
    opacity: 0;
  }

  /**
   * @modifier .fs-lightbox-open
   * @description Open state modifier. Applied after modal is shown to trigger transition.
   * Dialog and backdrop fade to full opacity.
   */
  /**
   * @selector .fs-lightbox-sr
   * @description Screen reader only content. Visually hidden but accessible to assistive tech.
   * Used for accessible button labels and status announcements.
   */
  /**
   * @selector .fs-lightbox-container
   * @description Main content container that holds all gallery items. Positioned absolutely
   * to fill dialog and handle pointer events for swipe navigation.
   */
  /**
   * @modifier .fs-lightbox-touching
   * @description Applied to container during active touch/pointer drag. Changes cursor to
   * grabbing state.
   */
  /**
   * @selector .fs-lightbox-item
   * @description Individual gallery item element. Contains wrap, media, and details.
   * Positioned absolutely and uses transforms for slide transitions between items.
   */
  /**
   * @modifier .fs-lightbox-active.fs-lightbox-loaded
   * @description Combined state for active item that has finished loading. Fades to full opacity.
   */
  /**
   * @selector .fs-lightbox-rtl .fs-lightbox-item
   * @description RTL direction overrides. Reverses previous/next transform directions.
   */
  /**
   * @selector .fs-lightbox-container.fs-lightbox-touching .fs-lightbox-item
   * @description Disables transitions during touch drag for immediate transform feedback.
   */
  /**
   * @selector .fs-lightbox-wrap
   * @description Inner wrapper for media content. Provides flexbox centering within item bounds.
   */
  /**
   * @selector .fs-lightbox-media
   * @description Media container. Holds the actual content (image, video iframe, etc.).
   * Constrains to viewport dimensions.
   */
  /**
   * @modifier .fs-lightbox-media_video
   * @description Video media type modifier. Sets max-width and allows growth for responsive embed.
   */
  /**
   * @modifier .fs-lightbox-media_element
   * @description Element media type modifier. Keeps vertical scrolling native and leaves horizontal
   * gestures to the swipe handler (otherwise the browser cancels the pointer to pan).
   */
  /**
   * @modifier .fs-lightbox-media_image
   * @description Image media type modifier. Constrains image dimensions and prevents user interaction.
   */
  /**
   * @selector .fs-lightbox-item:has(.fs-lightbox-media_image)
   * @description Image items leave all touch gestures to the lightbox, so a pinch's second finger
   * can land outside the image without zooming the page.
   */
  /**
   * @selector .fs-lightbox-zoomed .fs-lightbox-image
   * @description Zoomed image. Drag to pan.
   */
  /**
   * @selector .fs-lightbox-video
   * @description Video iframe container. Maintains 16:9 aspect ratio via aspect-ratio property.
   */
  /**
   * @selector .fs-lightbox-iframe
   * @description Generic iframe container. Sets iframe to full viewport dimensions minus safe areas.
   */
  /**
   * @selector .fs-lightbox-element
   * @description Inline element container. Allows scrolling for content that exceeds viewport.
   */
  /**
   * @selector .fs-lightbox-details
   * @description Details section at bottom of active item. Contains caption and ordinal position.
   * Gradient background and delayed fade-in on item change.
   */
  /**
   * @selector .fs-lightbox-item.fs-lightbox-active .fs-lightbox-details
   * @description Details visible state. Fades in with delay after item transition completes.
   */
  /**
   * @selector .fs-lightbox-container.fs-lightbox-touching .fs-lightbox-item.fs-lightbox-active .fs-lightbox-details
   * @description Details hidden during touch interaction. Improves visibility of content being swiped.
   */
  /**
   * @selector .fs-lightbox-zoomed .fs-lightbox-item.fs-lightbox-active .fs-lightbox-details
   * @description Details hidden while zoomed, so they don't cover the image or catch pointers.
   */
  /**
   * @selector .fs-lightbox-close
   * @description Close button. Fixed at top-right with safe area offset. Always visible.
   */
  /**
   * @selector .fs-lightbox-zoom
   * @description Zoom in/out buttons, beside the close button. Shown when the active item is a
   * loaded image (.fs-lightbox-zoomable).
   */
  /**
   * @selector .fs-lightbox-zoom:not([aria-disabled="true"])
   * @description Enabled zoom buttons. Full opacity and clickable cursor; unavailable buttons are
   * dimmed and ignore clicks.
   */
  /**
   * @selector .fs-lightbox-control
   * @description Previous/next navigation buttons. Hidden for single-item lightboxes.
   * Vertically centered on desktop, bottom-aligned on mobile.
   */
  /**
   * @selector .fs-lightbox-rtl .fs-lightbox-control
   * @description RTL overrides for navigation buttons. Swaps left/right positioning and flips icons.
   */
  /**
   * @selector .fs-lightbox-control:not([aria-disabled="true"])
   * @description Enabled control buttons. Full opacity and clickable cursor; unavailable buttons
   * (the ends of a gallery without loop) are dimmed and ignore clicks.
   */
  /**
   * @selector .fs-lightbox-loading
   * @description Loading spinner. Centered in viewport, animated border-spin. Hidden by default,
   * shown via .fs-lightbox-visible modifier during content load.
   */
  /**
   * @modifier .fs-lightbox-visible
   * @description Visible state for loading spinner. Fades to full opacity.
   */
}

@media (prefers-reduced-motion) {
  .fs-lightbox {
    --fs-lightbox-duration: 0s;
    --fs-lightbox-loading-duration: 0s;
    --fs-lightbox-item-duration: 0s;
    --fs-lightbox-zoom-duration: 0s;
  }
}

.fs-lightbox[open] {
  display: flex;
}

.fs-lightbox,
.fs-lightbox * {
  box-sizing: border-box;
}

.fs-lightbox::backdrop {
  background: var(--fs-lightbox-overlay-bg);
  opacity: 0;
  transition: display var(--fs-lightbox-duration) var(--fs-lightbox-timing) allow-discrete, opacity var(--fs-lightbox-duration) var(--fs-lightbox-timing), overlay var(--fs-lightbox-duration) var(--fs-lightbox-timing) allow-discrete;
}

.fs-lightbox-open {
  opacity: 1;
}

.fs-lightbox-open::backdrop {
  opacity: 1;

  @starting-style {
    opacity: 0;
  }
}

.fs-lightbox-sr {
  width: 1px !important;
  height: 1px !important;
  position: absolute !important;
  border-width: 0 !important;
  clip-path: rect(0 0 0 0) !important;
  margin: -1px !important;
  overflow: hidden !important;
  padding: 0 !important;
  white-space: nowrap !important;
}

.fs-lightbox-container {
  position: absolute;
  inset: 0;
  z-index: 1;
  user-select: none;
}

.fs-lightbox-container.fs-lightbox-touching {
  cursor: grabbing;
}

.fs-lightbox-item {
  position: absolute;
  top: env(safe-area-inset-top, 0px);
  right: env(safe-area-inset-right, 0px);
  bottom: env(safe-area-inset-bottom, 0px);
  left: env(safe-area-inset-left, 0px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--fs-lightbox-item-duration) var(--fs-lightbox-item-timing), transform var(--fs-lightbox-item-duration) var(--fs-lightbox-item-timing);
  transform: none;
  /**
     * @modifier .fs-lightbox-item_previous
     * @description Previous item modifier. Item is translated -100% to the left (or right in RTL).
     */
  /**
     * @modifier .fs-lightbox-item_next
     * @description Next item modifier. Item is translated 100% to the right (or left in RTL).
     */
}

.fs-lightbox-item_previous {
  transform: translate(-100%, 0);
}

.fs-lightbox-item_next {
  transform: translate(100%, 0);
}

.fs-lightbox-item.fs-lightbox-active.fs-lightbox-loaded {
  opacity: 1;
}

.fs-lightbox-rtl .fs-lightbox-item_previous {
  transform: translate(100%, 0);
}

.fs-lightbox-rtl .fs-lightbox-item_next {
  transform: translate(-100%, 0);
}

.fs-lightbox-container.fs-lightbox-touching .fs-lightbox-item {
  transition: none;
}

.fs-lightbox-wrap {
  max-height: 100%;
  max-width: 100%;
  display: flex;
  justify-content: center;
  position: relative;
}

.fs-lightbox-media {
  height: auto;
  width: auto;
  max-height: 100%;
  max-width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fs-lightbox-media_video {
  max-width: 1200px;
  flex-grow: 1;
}

.fs-lightbox-media_element {
  touch-action: pan-y;
}

.fs-lightbox-media_image img {
  height: auto;
  width: auto;
  min-width: 200px;
  max-height: 100%;
  max-width: 100%;
  border: none;
  display: block;
  margin: auto;
  transition: transform var(--fs-lightbox-zoom-duration) var(--fs-lightbox-item-timing);
  user-select: none;
  touch-action: none;
}

.fs-lightbox-item:has(.fs-lightbox-media_image) {
  touch-action: none;
}

.fs-lightbox-zoomed .fs-lightbox-image {
  cursor: grab;
}

.fs-lightbox-container.fs-lightbox-touching .fs-lightbox-image {
  cursor: grabbing;
}

.fs-lightbox-video {
  position: relative;
  width: 100%;
}

.fs-lightbox-video iframe {
  aspect-ratio: 16 / 9;
  width: 100%;
  background: #000;
}

.fs-lightbox-iframe iframe {
  height: calc(100vh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
  width: calc(100vw - env(safe-area-inset-left, 0px) - env(safe-area-inset-right, 0px));
  background: #000;
}

.fs-lightbox-element {
  max-width: 100%;
  max-height: 100%;
  overflow: auto;
}

.fs-lightbox-details {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--fs-lightbox-details-gap);
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  background: linear-gradient(to bottom, transparent, var(--fs-lightbox-details-bg));
  color: var(--fs-lightbox-details-color);
  font: var(--fs-lightbox-details-font);
  opacity: 0;
  padding: var(--fs-lightbox-details-padding);
  transition: opacity 0.001s var(--fs-lightbox-item-timing) 0s;
  pointer-events: none;
}

.fs-lightbox-details * {
  pointer-events: all;
}

.fs-lightbox-item.fs-lightbox-active .fs-lightbox-details {
  opacity: 1;
  transition-delay: var(--fs-lightbox-item-duration);
  transition-duration: var(--fs-lightbox-item-duration);
}

.fs-lightbox-container.fs-lightbox-touching .fs-lightbox-item.fs-lightbox-active .fs-lightbox-details {
  opacity: 0;
  transition-delay: 0.001s;
  transition-duration: 0s;
}

.fs-lightbox-zoomed .fs-lightbox-item.fs-lightbox-active .fs-lightbox-details {
  opacity: 0;
  visibility: hidden;
}

.fs-lightbox-close {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  width: 40px;
  position: absolute;
  top: env(safe-area-inset-top, 0px);
  right: env(safe-area-inset-right, 0px);
  z-index: 2;
  appearance: none;
  background: var(--fs-lightbox-button-background);
  border: none;
  color: var(--fs-lightbox-button-color);
  cursor: pointer;
  padding: 0;
}

.fs-lightbox-close svg {
  width: 30px;
}

.fs-lightbox:not(.fs-lightbox-zoomable) .fs-lightbox-zoom {
  display: none;
}

.fs-lightbox-zoom {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  width: 40px;
  position: absolute;
  top: env(safe-area-inset-top, 0px);
  z-index: 2;
  appearance: none;
  background: var(--fs-lightbox-button-background);
  border: none;
  color: var(--fs-lightbox-button-color);
  padding: 0;
  opacity: 0.5;
  transition: opacity var(--fs-lightbox-duration) var(--fs-lightbox-timing);
  /**
     * @modifier .fs-lightbox-zoom_in
     * @description Zoom in button, left of the close button.
     */
  /**
     * @modifier .fs-lightbox-zoom_out
     * @description Zoom out button, left of the zoom in button.
     */
}

.fs-lightbox-zoom_in {
  right: calc(env(safe-area-inset-right, 0px) + 40px);
}

.fs-lightbox-zoom_out {
  right: calc(env(safe-area-inset-right, 0px) + 80px);
}

.fs-lightbox-zoom svg {
  width: 28px;
}

.fs-lightbox-zoom:not([aria-disabled="true"]) {
  cursor: pointer;
  opacity: 1;
}

.fs-lightbox:not(.fs-lightbox-gallery) .fs-lightbox-control {
  display: none;
}

.fs-lightbox-control {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  width: 40px;
  position: absolute;
  top: env(safe-area-inset-top, 0px);
  bottom: env(safe-area-inset-bottom, 0px);
  z-index: 2;
  appearance: none;
  background: var(--fs-lightbox-button-background);
  border: none;
  color: var(--fs-lightbox-button-color);
  margin: auto;
  padding: 0;
  opacity: 0.5;
  transition: opacity var(--fs-lightbox-duration) var(--fs-lightbox-timing);
  /**
     * @modifier .fs-lightbox-control_previous
     * @description Previous button modifier. Positioned on left edge (or right in RTL).
     */
  /**
     * @modifier .fs-lightbox-control_next
     * @description Next button modifier. Positioned on right edge (or left in RTL).
     */
}

@media screen and (max-width: $fs-lightbox-mobile-max-width) {
  .fs-lightbox-control {
    top: auto;
  }
}

.fs-lightbox-control_previous {
  left: 0;
}

.fs-lightbox-control_next {
  right: 0;
}

.fs-lightbox-control svg {
  width: 28px;
}

.fs-lightbox-rtl .fs-lightbox-control svg {
  transform: scale(-1);
}

.fs-lightbox-rtl .fs-lightbox-control_previous {
  left: unset;
  right: 0;
}

.fs-lightbox-rtl .fs-lightbox-control_next {
  right: unset;
  left: 0;
}

.fs-lightbox-control:not([aria-disabled="true"]) {
  cursor: pointer;
  opacity: 1;
}

.fs-lightbox-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  height: var(--fs-lightbox-loading-size);
  width: var(--fs-lightbox-loading-size);
  position: fixed;
  inset: 0;
  animation: fs-lightbox-loading-spin var(--fs-lightbox-loading-duration) linear infinite;
  border: var(--fs-lightbox-loading-spread) solid transparent;
  border-top-color: var(--fs-lightbox-loading-color);
  border-radius: 100%;
  margin: auto;
  opacity: 0;
  transition: opacity var(--fs-lightbox-duration) var(--fs-lightbox-timing);
}

.fs-lightbox-loading.fs-lightbox-visible {
  opacity: 1;
}

/**
 * @keyframes fs-lightbox-loading-spin
 * @description Loading spinner rotation animation. Infinite 360-degree rotation.
 */
@keyframes fs-lightbox-loading-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}