:root {
  --haram-document-transition-bg: rgba(240, 236, 228, 0.68);
  --haram-document-transition-enter: 300ms;
  --haram-document-transition-exit: 420ms;
  --haram-document-transition-easing: cubic-bezier(0.22, 1, 0.36, 1);
}

html.dark {
  --haram-document-transition-bg: rgba(16, 31, 31, 0.7);
}

.haram-document-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 12000;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  background: var(--haram-document-transition-bg);
  -webkit-backdrop-filter: blur(0);
  backdrop-filter: blur(0);
  transition:
    opacity var(--haram-document-transition-exit) var(--haram-document-transition-easing),
    -webkit-backdrop-filter var(--haram-document-transition-exit)
      var(--haram-document-transition-easing),
    backdrop-filter var(--haram-document-transition-exit) var(--haram-document-transition-easing),
    visibility 0s linear var(--haram-document-transition-exit);
}

.haram-document-transition-overlay[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  will-change: opacity, backdrop-filter;
  transition:
    opacity var(--haram-document-transition-enter) var(--haram-document-transition-easing),
    -webkit-backdrop-filter var(--haram-document-transition-enter)
      var(--haram-document-transition-easing),
    backdrop-filter var(--haram-document-transition-enter) var(--haram-document-transition-easing),
    visibility 0s linear 0s;
}

/* ═══ علامة الانتقال — الشعار بلمعة تعبره ═══════════════════════════════════
   الغطاء كان div فارغاً. هذه القواعد إضافةٌ محضة: لا تمسّ الضباب ولا الألوان
   ولا المدد القائمة. مرآتها في src/styles.css — يُعدَّلان معاً كعادة المشروع. */
.haram-transition-mark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 132px;
  height: 132px;
  margin: -66px 0 0 -66px;
  opacity: 0;
  transform: scale(0.98);
  transition:
    opacity 260ms var(--haram-document-transition-easing),
    transform 260ms var(--haram-document-transition-easing);
}
.haram-transition-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
/* اللمعة: شعاع مائل يعبر الشعار. القناع بشكل الشعار نفسه فلا تخرج إلى المربّع،
   والمتحرِّك background-position لا transform — تحريك العنصر يحرّك القناع معه
   فتنكسر اللمعة وتبدو كأن الشعار كلّه ينزلق. */
.haram-transition-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    115deg,
    transparent 42%,
    rgba(255, 255, 255, 0.92) 50%,
    transparent 58%
  );
  background-size: 260% 100%;
  background-position: 160% 0;
  -webkit-mask: url("/haram-mark.webp") center / contain no-repeat;
  mask: url("/haram-mark.webp") center / contain no-repeat;
}
[data-visible="true"] > .haram-transition-mark {
  opacity: 1;
  transform: scale(1);
}
[data-visible="true"] > .haram-transition-mark::after {
  animation: haram-shimmer 1800ms ease-in-out infinite;
}
@keyframes haram-shimmer {
  0% {
    background-position: 160% 0;
  }
  100% {
    background-position: -60% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --haram-document-transition-enter: 90ms;
    --haram-document-transition-exit: 90ms;
  }
  /* الشعار يبقى ظاهراً ساكناً — تُطفأ اللمعة وحدها */
  .haram-transition-mark,
  [data-visible="true"] > .haram-transition-mark {
    transition: none;
    opacity: 1;
    transform: none;
  }
  [data-visible="true"] > .haram-transition-mark::after {
    animation: none;
  }
}