/* ==========================================================
   CAS Site Lightbox v1.1.1
   Central opt-in image zoom for CAS public pages.
   Activate with: data-cas-lightbox

   v1.1.1:
   - True mobile viewport height via --cas-lightbox-vh.
   - Firefox / Firefox Focus mobile safe.
   - Header and controls remain visible.
   - Tall images scroll inside the viewport area.
   ========================================================== */

:root {
  --cas-lightbox-vh: 100vh;
  --cas-lightbox-mobile-gap: 8px;
}

[data-cas-lightbox] {
  cursor: zoom-in;
}

.cas-lightbox-is-open {
  overflow: hidden !important;
  overscroll-behavior: none !important;
}

.cas-lightbox {
  position: fixed;
  inset: 0;
  z-index: 999999;

  display: none;
  align-items: center;
  justify-content: center;

  width: 100%;
  height: var(--cas-lightbox-vh);
  min-height: 0;

  padding: clamp(16px, 3vw, 36px);
  box-sizing: border-box;

  overflow: hidden;
  overscroll-behavior: contain;

  background:
    radial-gradient(circle at 18% 12%, rgba(124, 58, 237, .22), transparent 34%),
    radial-gradient(circle at 82% 88%, rgba(234, 88, 12, .16), transparent 38%),
    rgba(15, 23, 42, .68);

  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

@supports (height: 100dvh) {
  :root {
    --cas-lightbox-vh: 100dvh;
  }
}

@supports (height: 100svh) {
  :root {
    --cas-lightbox-vh: 100svh;
  }
}

.cas-lightbox.is-open {
  display: flex;
}

.cas-lightbox__panel {
  width: min(1280px, 96vw);
  max-height: calc(var(--cas-lightbox-vh) - 32px);
  min-height: 0;

  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;

  border-radius: 30px;
  border: 1px solid rgba(255,255,255,.46);

  background:
    linear-gradient(145deg, rgba(255,255,255,.94), rgba(248,245,255,.86));

  box-shadow:
    0 34px 100px rgba(15, 23, 42, .38),
    0 1px 0 rgba(255,255,255,.8) inset;

  overflow: hidden;
}

.cas-lightbox__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;

  min-height: 0;
  padding: 14px 16px 12px 20px;
  border-bottom: 1px solid rgba(124, 58, 237, .14);
}

.cas-lightbox__title {
  margin: 0;
  color: #1f2937;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.35;
}

.cas-lightbox__close {
  appearance: none;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 38px;
  height: 38px;
  min-width: 38px;
  padding: 0;

  border-radius: 999px;
  border: 1px solid rgba(124, 58, 237, .22);
  background: rgba(255,255,255,.82);

  color: #6b21a8;
  font-size: 0;
  line-height: 1;

  cursor: pointer;
}

.cas-lightbox__close::before {
  content: "×";
  display: block;

  font-size: 27px;
  font-weight: 400;
  line-height: 1;

  transform: translateY(-1px);
}

.cas-lightbox__close:hover {
  background: #ffffff;
  transform: translateY(-1px);
}

.cas-lightbox__viewport {
  min-height: 0;
  overflow: auto;

  padding: clamp(14px, 2vw, 24px);
  text-align: center;

  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.cas-lightbox__image {
  display: block;

  width: auto;
  max-width: 100%;
  max-height: calc(var(--cas-lightbox-vh) - 160px);
  height: auto;

  margin: 0 auto;

  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 24px 68px rgba(15, 23, 42, .18);

  transform-origin: top center;
}

.cas-lightbox__foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  min-height: 0;
  padding: 12px 16px 16px;
  border-top: 1px solid rgba(124, 58, 237, .12);
}

.cas-lightbox__btn {
  appearance: none;

  border: 1px solid rgba(124, 58, 237, .22);
  background: rgba(255,255,255,.86);
  color: #6b21a8;

  border-radius: 999px;
  padding: 9px 14px;

  font-size: 13px;
  font-weight: 800;
  line-height: 1;

  cursor: pointer;
}

.cas-lightbox__btn:hover {
  background: #ffffff;
  transform: translateY(-1px);
}

.cas-lightbox__hint {
  margin-left: 6px;
  color: #64748b;
  font-size: 12px;
  font-weight: 600;
}

@media (max-width: 720px) {
  :root {
    --cas-lightbox-mobile-gap: 8px;
  }

  .cas-lightbox {
    align-items: stretch;
    justify-content: center;

    height: var(--cas-lightbox-vh);
    padding:
      max(var(--cas-lightbox-mobile-gap), env(safe-area-inset-top))
      max(var(--cas-lightbox-mobile-gap), env(safe-area-inset-right))
      max(var(--cas-lightbox-mobile-gap), env(safe-area-inset-bottom))
      max(var(--cas-lightbox-mobile-gap), env(safe-area-inset-left));
  }

  .cas-lightbox__panel {
    width: 100%;
    height: calc(var(--cas-lightbox-vh) - (var(--cas-lightbox-mobile-gap) * 2));
    max-height: calc(var(--cas-lightbox-vh) - (var(--cas-lightbox-mobile-gap) * 2));
    min-height: 0;

    grid-template-rows: auto minmax(0, 1fr) auto;
    border-radius: 24px;
  }

  .cas-lightbox__head {
    flex: 0 0 auto;
    padding: 10px 10px 8px 14px;
  }

  .cas-lightbox__title {
    font-size: 13px;
  }

  .cas-lightbox__close {
    width: 36px;
    height: 36px;
    min-width: 36px;
  }

  .cas-lightbox__viewport {
    min-height: 0;
    overflow: auto;

    padding: 10px;
    text-align: left;

    scrollbar-width: thin;
    scrollbar-color: rgba(100, 48, 201, .35) rgba(255,255,255,.34);
  }

  .cas-lightbox__image {
    width: 100%;
    max-width: 100%;
    max-height: none;
    height: auto;

    border-radius: 18px;
  }

  .cas-lightbox__foot {
    flex: 0 0 auto;
    flex-wrap: wrap;
    gap: 8px;

    padding:
      9px
      10px
      max(10px, env(safe-area-inset-bottom));
  }

  .cas-lightbox__btn {
    padding: 8px 12px;
    font-size: 12px;
  }

  .cas-lightbox__hint {
    width: 100%;
    margin: 2px 0 0;
    text-align: center;
    font-size: 11px;
  }
}

@media (max-width: 720px) and (max-height: 560px) {
  :root {
    --cas-lightbox-mobile-gap: 6px;
  }

  .cas-lightbox__head {
    padding: 7px 8px 6px 10px;
  }

  .cas-lightbox__title {
    font-size: 12px;
  }

  .cas-lightbox__close {
    width: 32px;
    height: 32px;
    min-width: 32px;
  }

  .cas-lightbox__close::before {
    font-size: 24px;
  }

  .cas-lightbox__viewport {
    padding: 7px;
  }

  .cas-lightbox__foot {
    gap: 6px;
    padding: 7px 8px max(8px, env(safe-area-inset-bottom));
  }

  .cas-lightbox__btn {
    padding: 7px 10px;
    font-size: 12px;
  }

  .cas-lightbox__hint {
    display: none;
  }
}

[data-cas-lightbox] {
  cursor: zoom-in;
  transition: transform .18s ease, filter .18s ease;
}

[data-cas-lightbox]:hover {
  filter: saturate(1.03);
}

.cas-lightbox__close,
.cas-lightbox__btn {
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
}