/* ============================================================================
   AccordionGallery — vanilla port of the React Bits component
   https://reactbits.dev  ·  JS + CSS variant  ·  powered by GSAP
   Used here for the brand wall (logos). Structure mirrors the original:
     .accordion-gallery > .ag-panel > .ag-panel__frame > .ag-panel__media > img
                                                      > .ag-panel__overlay
                                 > .ag-panel__label > .ag-panel__bar / __text
   ========================================================================= */

.accordion-gallery {
  --ag-accent: #ffffff;
  --ag-overlay: #060010;
  --ag-text: #ffffff;
  --ag-gap: 10px;
  --ag-radius: 16px;
  --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; }

.ag-panel {
  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: #0a0713;
  box-shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.8);
  will-change: flex-grow, transform;
  -webkit-tap-highlight-color: transparent;
}
.ag-panel[hidden] { display: none; }
.ag-panel:focus-visible {
  box-shadow: 0 0 0 2px var(--ag-accent), 0 10px 30px -18px rgba(0, 0, 0, 0.8);
}

.ag-panel__frame { position: absolute; inset: 0; overflow: hidden; border-radius: inherit; }
.ag-panel__media {
  --ag-gray: 1;
  --ag-dim: 0.35;
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--ag-media-size);
  height: 100%;
  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 {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.ag-panel__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  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, 0.35) * 100%), transparent);
}

.ag-panel__label {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
  z-index: 2;
}
.ag-panel__bar {
  flex: 0 0 auto;
  width: 3px;
  height: 26px;
  border-radius: 3px;
  background: var(--ag-accent);
  opacity: 0;
  box-shadow: 0 0 12px color-mix(in srgb, var(--ag-accent) 60%, transparent);
}
.ag-panel__text {
  color: var(--ag-text);
  font-family: inherit;
  font-weight: 600;
  font-size: clamp(1rem, 1.4vw, 1.4rem);
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.55);
}

/* ── brand / logo usage: contained logos on light panels ──────────────────── */
.accordion-gallery--logos .ag-panel { background: #ffffff; }
.accordion-gallery--logos .ag-panel__media { width: 100%; }
.accordion-gallery--logos .ag-panel__media img {
  object-fit: contain;
  /* % padding resolves against the panel width, so the framing scales
     with the expand/collapse instead of hugging the logo when open */
  padding: 9%;
}
/* keep collapsed logos from going muddy — only a whisper of dim */
.accordion-gallery--logos .ag-panel__overlay {
  background: color-mix(in srgb, var(--ag-overlay) calc(var(--ag-dim, 0) * 30%), transparent);
}
.accordion-gallery--logos .ag-panel__text { color: #1a1410; text-shadow: none; }
.accordion-gallery--logos .ag-panel__label { left: 16px; right: 16px; bottom: 16px; }
.accordion-gallery--logos .ag-panel--active .ag-panel__text { color: #1a1410; }

/* small category / 参投 badge on each panel */
.ag-panel__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 4px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, #1a1410 8%, transparent);
  color: #6b5b4a;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.4s var(--ease, ease);
}
.ag-panel--active .ag-panel__tag { opacity: 1; }

@media (max-width: 520px) {
  .accordion-gallery {
    flex-direction: column;
    perspective: none;
    height: auto !important;
  }
  .ag-panel {
    min-height: 92px;
    transform: none !important;
  }
  .accordion-gallery .ag-panel__media { width: 100%; height: var(--ag-media-size); }
}

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