/* ==========================================================================
   Lambda Phi Epsilon — Alpha Xi Chapter
   AccordionGallery — vanilla port of the React Bits component of the same name.
   Structural CSS is the reference's; only the palette is the chapter's
   (royal blue and white, no third hue). Self-contained: every selector below
   is scoped to .accordion-gallery / .ag-*.
   ========================================================================== */

.accordion-gallery {
  --ag-accent: #FFFFFF;
  --ag-overlay: #061539;          /* --navy-900 */
  --ag-text: #FFFFFF;
  --ag-gap: 10px;
  --ag-radius: 8px;               /* --radius-lg */
  --ag-media-size: 320px;

  display: flex;
  flex-direction: row;
  gap: var(--ag-gap);
  width: 100%;
  max-width: 100%;
  perspective: 1400px;
  perspective-origin: 50% 50%;
}

.accordion-gallery--vertical { flex-direction: column; }

/* ---- Panel --------------------------------------------------------------- */
.ag-panel {
  /* Both live on the panel, not the media: the overlay is a sibling of the
     media and can only inherit these from a shared ancestor. (The React
     original set them on the media, where the overlay never saw --ag-dim.) */
  --ag-gray: 1;
  --ag-dim: .35;

  position: relative;
  flex: 1 1 0;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border-radius: var(--ag-radius);
  cursor: pointer;
  display: block;
  text-decoration: none;
  outline: none;
  transform-style: preserve-3d;
  transform-origin: center center;
  background: #061539;
  box-shadow: 0 10px 30px -18px rgba(6, 21, 60, .8);
  will-change: flex-grow, transform;
  -webkit-tap-highlight-color: transparent;
}

.ag-panel:focus-visible {
  outline: 2px solid var(--ag-accent);
  outline-offset: -6px;
  box-shadow: 0 0 0 2px var(--ag-accent), 0 10px 30px -18px rgba(6, 21, 60, .8);
}

.ag-panel__frame {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
}

/* ---- Media (image or deterministic gradient placeholder) ----------------- */
.ag-panel__media {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--ag-media-size);
  height: 100%;
  transform: translate(-50%, -50%);
  filter: grayscale(var(--ag-gray));
  will-change: transform, filter;
}

.accordion-gallery--vertical .ag-panel__media {
  width: 100%;
  height: var(--ag-media-size);
}

.ag-panel__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
}

/* Placeholder: pure CSS, no network. Stops are set per index from JS, so no
   two neighbouring pillars read the same. */
.ag-panel__ph {
  position: absolute;
  inset: 0;
  display: block;
  background:
    radial-gradient(120% 80% at 22% 12%, rgba(255, 255, 255, .10) 0%, rgba(255, 255, 255, 0) 62%),
    linear-gradient(var(--ag-ph-angle, 155deg), var(--ag-ph-a, #12296B) 0%, var(--ag-ph-b, #061539) 100%);
}

.ag-panel__letter {
  position: absolute;
  top: 44%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  font-weight: 600;
  font-size: min(calc(var(--ag-media-size) * .52), 9rem);
  line-height: 1;
  color: var(--ag-text);
  opacity: .17;
  letter-spacing: 0;
  user-select: none;
  -webkit-user-select: none;
  pointer-events: none;
}

/* ---- Overlay ------------------------------------------------------------- */
.ag-panel__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  /* Fallback for browsers without color-mix(). */
  background: linear-gradient(180deg, transparent 45%, rgba(6, 21, 60, .78) 100%);
}

@supports (background: color-mix(in srgb, #000 50%, transparent)) {
  .ag-panel__overlay {
    background:
      linear-gradient(180deg, transparent 45%, color-mix(in srgb, var(--ag-overlay) 78%, transparent) 100%),
      color-mix(in srgb, var(--ag-overlay) calc(var(--ag-dim, .35) * 100%), transparent);
  }
}

/* ---- Label --------------------------------------------------------------- */
.ag-panel__label {
  position: absolute;
  left: 20px;
  bottom: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
  z-index: 2;
}

.ag-panel__bar {
  flex: 0 0 auto;
  width: 3px;
  height: 34px;
  border-radius: 3px;
  background: var(--ag-accent);
  opacity: 0;
  box-shadow: 0 0 12px rgba(255, 255, 255, .6);
}

.ag-panel__lines {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ag-panel__text {
  color: var(--ag-text);
  font-family: inherit;
  font-weight: 600;
  font-size: clamp(1rem, 1.4vw, 1.4rem);
  letter-spacing: .01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0;
  text-shadow: 0 2px 14px rgba(6, 21, 60, .55);
}

/* The first click on a closed panel only opens it, so the open panel has to
   say plainly that the next tap goes somewhere. */
.ag-panel__cue {
  color: var(--ag-text);
  font-family: inherit;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0;
  text-shadow: 0 2px 10px rgba(6, 21, 60, .55);
}

/* ---- Small screens: the accordion becomes a vertical stack --------------- */
@media (max-width: 520px) {
  .accordion-gallery {
    flex-direction: column;
    perspective: none;
    height: auto !important;
  }
  .accordion-gallery .ag-panel {
    min-height: 84px;
    transform: none !important;
  }
  .accordion-gallery .ag-panel__media {
    width: 100%;
    height: var(--ag-media-size);
    /* No horizontal parallax to expose an edge once the media is full width. */
    transform: translate(-50%, -50%) !important;
  }
  /* Every panel is tappable and named here — labels stay put. */
  .accordion-gallery .ag-panel__bar,
  .accordion-gallery .ag-panel__text {
    opacity: 1 !important;
    transform: none !important;
  }
  /* ...but only the open panel promises that a tap navigates. */
  .accordion-gallery .ag-panel__cue {
    opacity: 0 !important;
    transform: none !important;
  }
  .accordion-gallery .ag-panel--active .ag-panel__cue { opacity: 1 !important; }
  /* Stacked rows are short and wide: the letter moves out from behind the
     label and sits on the right instead. */
  .accordion-gallery .ag-panel__letter {
    font-size: 3.5rem;
    top: 50%;
    left: auto;
    right: 22px;
    transform: translate(0, -50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ag-panel,
  .ag-panel__media { will-change: auto; }
}