/*
|--------------------------------------------------------------------------
| Vocabulary Shared Card CSS
|--------------------------------------------------------------------------
| تعليق عربي:
| هذا الملف يحتوي شكل الكروت والمحتوى المشترك:
| وجه/ظهر البطاقة، الكلمات، الجمل، التصاريف، أزرار الصوت، العلامات، والـ watermark.
| لا تضع هنا قواعد خاصة بالسحب فقط أو التصميم البسيط فقط.
| بعد أي تعديل هنا يجب تحديث page.css المجمّع.
*/

.vocabulary-index-page,
.vocab-flashcard-study-shell {
    --vocab-stack-card-drag-z: 2147483000;
}

/* Flip card container — كرت أكبر قليلاً لظهور أوضح للمقال والجمل */
.vocabulary-card-wrapper { perspective: 1000px; min-height: 380px; cursor: pointer; }
.vocabulary-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 380px;
    transition: transform 0.5s;
    transform-style: preserve-3d;
}
.vocabulary-card-wrapper.flipped .vocabulary-card-inner { transform: rotateY(180deg); }
.vocabulary-card-front,
.vocabulary-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    min-height: 380px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.vocabulary-card-back { transform: rotateY(180deg); }

/* وجه الكرت: الكلمة في المنتصف؛ مع عربي→ألماني الجملة العربية سطر جديد وكبيرة */
.vocabulary-card-front {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* وجه الكلمة: أغمق قليلاً من ظهر المعنى */
    background: linear-gradient(145deg, #eef2f7 0%, #e2e8f0 100%);
    border: 1px solid #e2e8f0;
    padding: 1rem;
}
.vocabulary-card-front .word-de-only,
.vocabulary-card-front .word-ar-only {
    font-size: 2rem;
    font-weight: 600;
    color: #1e293b;
    text-align: center;
    padding: 0.5rem;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
}
.vocabulary-card-front .front-sentence {
    display: block;
    width: 100%;
    font-size: 1.5rem;
    font-weight: 500;
    color: #334155;
    margin-top: 1rem;
    text-align: center;
    line-height: 1.45;
    padding: 0 0.5rem;
}

/* ظهر الكرت: كلمات بالمنتصف، كبيرة وواضحة، عرض احترافي */
.vocabulary-card-back {
    /* ظهر المعنى/الأمثلة: أفتح */
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e2e8f0;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.vocabulary-card-back .card-back-content {
    padding: 1rem 1.1rem 0.9rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 380px;
    justify-content: space-between;
}
.vocabulary-card-back .card-back-meta {
    flex-shrink: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}
.vocabulary-card-back .card-back-meta .badge-level {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.3rem 0.6rem;
}
/* منطقة المنتصف: الكلمات + الجمل معاً في وسط الكرت */
.vocabulary-card-back .card-back-center {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0.5rem 0;
    min-height: 0;
    width: 100%;
}
.vocabulary-card-back .card-back-words {
    flex-shrink: 0;
}
/* المقال der/die/das — واضح وكبير بجانب الكلمة أو فوقها */
.vocabulary-card-back .card-back-article {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 0.35rem;
    letter-spacing: 0.02em;
    text-transform: lowercase;
}
.vocabulary-card-back .card-back-word-de {
    font-size: 2rem;
    font-weight: 700;
    color: #0f172a;
    line-height: 1.3;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
}
.vocabulary-card-back .card-back-word-de-with-article {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    direction: ltr;
    unicode-bidi: isolate;
    align-items: baseline;
    justify-content: center;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}
.vocabulary-card-back .card-back-word-de-with-article .card-back-article {
    margin-bottom: 0;
    font-size: 1.55rem;
}
.vocabulary-card-back .card-back-word-de-with-article .card-back-word-de {
    margin-bottom: 0;
}
.vocabulary-card-back .card-back-word-ar {
    font-size: 1.75rem;
    font-weight: 600;
    color: #b60000;
    line-height: 1.4;
    margin-bottom: 0.25rem;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
}
.vocabulary-card-back .card-back-word-en {
    font-size: 1.25rem;
    font-weight: 500;
    color: #b60000;
    line-height: 1.4;
}
.vocabulary-card-back .card-back-sentence {
    flex-shrink: 0;
    padding: 0.75rem 0 0;
    margin-top: 0.5rem;
    border-top: 1px solid #e2e8f0;
    width: 100%;
    max-width: 100%;
}
/* الجمل — كبيرة وواضحة لراحة كبار السن */
.vocabulary-card-back .sentence-line {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 1.25rem;
    line-height: 1.5;
    color: #475569;
    margin-bottom: 0.35rem;
}
.vocabulary-card-back .sentence-line:last-child { margin-bottom: 0; }
.vocabulary-card-back .sentence-line strong { color: #334155; font-size: 1.25rem; }

/* تصريف الأفعال — حاضر، ماضي بسيط، ماضي تام */
.card-back-verb-forms,
.stack-card .stack-back-verb-forms {
    flex-shrink: 0;
    width: 100%;
}
/* جدول بلا حدود: صف التسميات + صف التصاريف — توفير مساحة عمودياً */
.verb-forms-table-wrap {
    width: 100%;
}
.card-back-verb-forms .verb-forms-table,
.stack-back-verb-forms .verb-forms-table {
    table-layout: fixed;
    width: 100%;
    margin-bottom: 0;
}
.card-back-verb-forms .verb-forms-table > :not(caption) > * > *,
.stack-back-verb-forms .verb-forms-table > :not(caption) > * > * {
    border: none !important;
    padding: 0.1rem 0.25rem;
    vertical-align: top;
}
.card-back-verb-forms .verb-forms-table thead th,
.stack-back-verb-forms .verb-forms-table thead th {
    font-weight: 500;
    font-size: 0.72rem;
    line-height: 1.2;
    color: #64748b;
    text-align: center;
    padding-bottom: 0.05rem;
}
.card-back-verb-forms .verb-forms-table tbody td,
.stack-back-verb-forms .verb-forms-table tbody td {
    font-weight: 600;
    font-size: 0.85rem;
    line-height: 1.25;
    color: #1e293b;
    text-align: center;
    word-wrap: break-word;
    overflow-wrap: anywhere;
}

/* أزرار الحالة — كبيرة مثل الصورة (مربعة/مستطيلة واضحة) */
.vocabulary-card-actions .actions-row {
    display: flex;
    gap: 0.4rem;
    width: 100%;
    align-items: stretch;
}
.vocabulary-card-actions .btn {
    flex: 1;
    min-height: 52px;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.5rem 0.4rem;
    border: none;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff !important;
}
.vocabulary-card-actions .btn-vocab-with-label,
.vocabulary-card-actions .btn-remind,
.vocabulary-card-actions .btn-vocab-repeat-5 {
    flex-direction: column;
    gap: 0.25rem;
    align-items: center;
    text-align: center;
    justify-content: flex-start;
    padding-top: 0.4rem;
}
/* تناظر مكان الرمز: منطقة النص تحت الرمز بارتفاع ثابت */
.vocabulary-card-actions .btn-vocab-with-label .btn-learned-label,
.vocabulary-card-actions .btn-remind .btn-remind-label,
.vocabulary-card-actions .btn-vocab-repeat-5 .btn-repeat-label {
    min-height: 2.4em;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.vocabulary-card-actions .btn-vocab-with-label .las { font-size: 1.1em; margin-inline-end: 0; flex-shrink: 0; }
.vocabulary-card-actions .btn-vocab-with-label .btn-learned-label { font-size: 0.9em; line-height: 1.25; white-space: normal; }
.vocabulary-card-actions .btn-remind .btn-remind-label { line-height: 1.2; }
.vocabulary-card-actions .btn-remind .btn-remind-times {
    font-size: 0.7rem;
    font-weight: 500;
    opacity: 0.95;
    line-height: 1.1;
}
/* صح = أخضر، خطأ = أحمر، ذكرني لاحقاً = موف */
.vocabulary-card-actions .btn-vocab-learned { background: #16a34a; color: #fff !important; }
.vocabulary-card-actions .btn-vocab-learned:hover { background: #15803d; color: #fff !important; }
.vocabulary-card-actions .btn-vocab-forgot,
.vocabulary-card-actions .btn-vocab-repeat-5 { background: #dc2626; color: #fff !important; }
.vocabulary-card-actions .btn-vocab-forgot:hover,
.vocabulary-card-actions .btn-vocab-repeat-5:hover { background: #b91c1c; color: #fff !important; }
.vocabulary-card-actions .btn-vocab-review { background: #8b5cf6; color: #fff !important; }
.vocabulary-card-actions .btn-vocab-review:hover { background: #7c3aed; color: #fff !important; }
.vocabulary-card-actions .btn-vocab-inactive { background: #e2e8f0; color: #475569 !important; }
.vocabulary-card-actions .btn-vocab-inactive:hover { background: #cbd5e1; color: #334155 !important; }
.vocabulary-card-actions .btn-remind .btn-remind-icon,
.vocabulary-card-actions .btn-vocab-repeat-5 .las { font-size: 1.1em; margin-inline-end: 0; }
.vocabulary-card-actions .btn-remind .btn-remind-times { font-size: 0.9em; }
.vocabulary-card-actions .btn-label-two-lines { display: flex; flex-direction: column; align-items: center; text-align: center; font-size: 0.9em; line-height: 1.25; }
.vocabulary-card-actions .btn-label-two-lines .btn-label-line1,
.vocabulary-card-actions .btn-label-two-lines .btn-label-line2 { display: block; }
.vocabulary-card-actions .btn-vocab-repeat-5 .btn-repeat-label,
.vocabulary-card-actions .btn-remind .btn-remind-label { white-space: normal; }


/* رسالة نهاية الصفحة في وسط منطقة الكروت */
#vocabulary-stack #stack-empty {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1rem;
    box-sizing: border-box;
    /* عند عدم وجود كروت: يضمن أن لوحة النهاية لا تنهار إلى ارتفاع صفر في بعض تخطيطات الفليكس */
    min-height: calc(var(--vocab-stack-card-h, 448px) + var(--vocab-stack-tail-space, 72px));
}
#vocabulary-stack #stack-empty .stack-page-done-msg {
    color: #1e293b;
}
/* نسبة الكرت مثل ورق اللعب (عرض : ارتفاع ≈ 2.5 : 3.5) */
.stack-card {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    --stack-card-face-bg: #f2ede4;
    --stack-card-back-bg: var(--stack-card-face-bg);
    --stack-card-surface-bg: var(--stack-card-face-bg);
    --stack-card-top-zone-h: 3.15rem;
    --stack-card-bottom-zone-h: 1.85rem;
    width: 100%;
    height: var(--vocab-stack-card-h, 448px);
    min-height: var(--vocab-stack-card-h, 448px);
    border-radius: 8px;
    border: 1px solid #1a1a1a;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.1);
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
    touch-action: none;
    transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.18s ease, opacity 0.24s ease;
    box-sizing: border-box;
    isolation: isolate;
    transform-origin: center center;
    -webkit-tap-highlight-color: transparent;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    /* Safari iOS: perspective on ancestor fixes backface-visibility on 3D flip children */
    perspective: 1400px;
    -webkit-perspective: 1400px;
}
/* touch-action غير موروث: الأبناء يورّثون none من الكرت حتى يبقى اللمس قابلاً للإلغاء على iOS. */
.stack-card * {
    touch-action: inherit;
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}
/* مناطق النص داخل الكرت: على الديسكتوب pan-x/pan-y للسكرول الطبيعي. على الموبايل يُفرض touch-action: none حتى لا يخطف المتصفح الإيماءة؛ السكرول داخل الوجه/الظهر يُطبَّق يدوياً في page.js */
.stack-card .stack-back-scroll,
.stack-card .stack-front-scroll {
    touch-action: pan-x pan-y;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    contain: paint;
}
@media (max-width: 767.98px) {
    .stack-card,
    .stack-card * {
        touch-action: none;
    }
    /* يطابق التعليق أعلاه: إلغاء pan على اللمس حتى يبقى السحب على البطاقة قابلاً للإلغاء؛ السكرول = منطق JS */
    .stack-card .stack-back-scroll,
    .stack-card .stack-front-scroll {
        touch-action: none !important;
    }
}
@media (prefers-reduced-motion: no-preference) {
    .stack-card .stack-back-scroll,
    .stack-card .stack-front-scroll {
        scroll-behavior: smooth;
    }
}
.stack-card:active { cursor: grabbing; }
/* تعليق عربي: إظهار عمق بسيط فقط خلف البطاقة الحالية. */
#vocabulary-stack .stack-card.vocab-card--active {
    opacity: 1 !important;
    pointer-events: auto;
    visibility: visible !important;
    z-index: 30 !important;
}
/* تعليق عربي: البطاقة التالية يجب أن تبقى واضحة 100% ولا تكون باهتة. */
#vocabulary-stack .stack-card.vocab-card--behind-1,
#vocabulary-stack .stack-card.vocab-card--behind-2 {
    opacity: 1 !important;
    pointer-events: none;
    visibility: visible;
}
/* تعليق عربي: البطاقة الخلفية تبقى ثابتة خلف الحالية بدون تقدم للأعلى أو تكبير. */
#vocabulary-stack .stack-card.vocab-card--behind-1 {
    transform: none;
    z-index: 20 !important;
}
/* تعليق عربي: البطاقة الثانية تبقى خلفية ثابتة أيضاً بدون حركة عمق. */
#vocabulary-stack .stack-card.vocab-card--behind-2 {
    transform: none;
    z-index: 10 !important;
}
/* تعليق عربي: إخفاء كل البطاقات الأعمق حتى لا تظهر كخطوط كثيرة تحت البطاقة. */
#vocabulary-stack .stack-card.vocab-card--hidden-depth {
    opacity: 0 !important;
    pointer-events: none !important;
    visibility: hidden !important;
    transform: translate3d(0, 0, 0) scale(0.96) !important;
}
#vocabulary-stack .stack-card.vocab-card--active.stack-card--dragging {
    opacity: 1 !important;
    visibility: visible;
    pointer-events: auto;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}
/* تعليق عربي: أثناء السحب تبقى البطاقة التالية واضحة وليست شفافة. */
.stack-drag-active #vocabulary-stack .stack-card.vocab-card--behind-1,
.stack-drag-active #vocabulary-stack .stack-card.vocab-card--behind-2 {
    opacity: 1 !important;
    visibility: visible;
}
/* تعليق عربي: منع بطاقة See more من الظهور كبطاقة خلفية تحت الكرت الحالي. */
#vocabulary-stack .stack-see-more-back:not(.vocab-card--active) {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}
.vocab-flashcard-study-shell.stack-drag-active,
.vocabulary-stack-wrap.stack-drag-active,
.vocab-flashcard-study-shell.stack-drag-active .vocab-flashcard-study-stage,
.vocab-flashcard-study-shell.stack-drag-active .stack-zone-outer,
.vocab-flashcard-study-shell.stack-drag-active .stack-zone-center {
    overflow: visible !important;
}
.stack-card.stack-card--dragging {
    z-index: 9999 !important;
    cursor: grabbing;
    will-change: transform;
    transition: none !important;
    animation: none !important;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.2), 0 7px 18px rgba(15, 23, 42, 0.12);
}
#vocabulary-stack .stack-card.stack-card--dragging .stack-card-flip {
    transition: none !important;
    animation: none !important;
}
.vocabulary-index-page.vocab-desktop-popup-open .stack-card.stack-card--dragging,
.vocabulary-index-page.vocab-mobile-expanded .stack-card.stack-card--dragging {
    z-index: 10080 !important;
}
.stack-card.stack-see-more-back {
    cursor: default;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    background: #fffef9;
    border: 1px solid #1a1a1a;
}
.stack-card.stack-see-more-back .stack-see-more-inner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.stack-card.stack-card-removed {
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
@keyframes stack-card-shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}
.stack-card.stack-card-shake { animation: stack-card-shake 0.5s ease-in-out; }

/* تعليق عربي: قلب حقيقي للبطاقة كما كان في تصميم السحب الأصلي. */
.stack-card .stack-card-flip {
    transform-style: preserve-3d !important;
    -webkit-transform-style: preserve-3d !important;
    transition: transform 0.58s cubic-bezier(0.22, 1, 0.36, 1);
}
.stack-card.flipped .stack-card-flip {
    transform: rotateY(180deg) !important;
    -webkit-transform: rotateY(180deg) !important;
}
.stack-card .stack-card-front,
.stack-card .stack-card-back {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    backface-visibility: hidden !important;
    -webkit-backface-visibility: hidden !important;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 0.55rem 0.5rem 0.45rem;
    min-height: 0;
    box-sizing: border-box;
    border-radius: 7px;
    transition:
        opacity 180ms ease,
        filter 180ms ease;
    will-change: opacity, transform;
}
.stack-card .stack-card-front {
    background: var(--stack-card-face-bg);
    pointer-events: auto;
    z-index: 2;
    opacity: 1 !important;
    visibility: visible !important;
    transform: rotateY(0deg) !important;
    -webkit-transform: rotateY(0deg) !important;
    filter: blur(0);
    transition-delay: 0s;
}
.stack-card .stack-card-back {
    background: var(--stack-card-back-bg);
    pointer-events: none;
    z-index: 1;
    opacity: 1 !important;
    visibility: visible !important;
    transform: rotateY(180deg) !important;
    -webkit-transform: rotateY(180deg) !important;
    filter: none;
}
.stack-card.flipped .stack-card-front {
    pointer-events: none;
    z-index: 1;
    opacity: 1 !important;
    visibility: visible !important;
    filter: none;
}
.stack-card.flipped .stack-card-back {
    pointer-events: auto;
    z-index: 2;
    opacity: 1 !important;
    visibility: visible !important;
    filter: blur(0);
    transition-delay: 0s;
}
@media (prefers-reduced-motion: reduce) {
    #vocabulary-stack .stack-card .stack-card-front,
    #vocabulary-stack .stack-card .stack-card-back,
    #vocabulary-stack .stack-card.vocab-card--active {
        transition: none !important;
        animation: none !important;
    }
}
/* =========================================================
   Stack card safe flip sequence — إحساس قلب بدون rotateY
   ========================================================= */
/* تعليق عربي: أثناء تبديل الوجه نسمح بتحريك حاوية الوجهين رغم أن rotateY متوقف. */
#vocabulary-stack .stack-card.stack-card--face-switching .stack-card-flip {
    transform-origin: center center;
    will-change: transform, opacity, filter;
}
/* تعليق عربي: المرحلة الأولى — ضغط البطاقة حتى تصبح كأنها تنقلب. */
#vocabulary-stack .stack-card.stack-card--face-exit .stack-card-flip {
    transform: scaleX(0.08) scaleY(1.015) !important;
    -webkit-transform: scaleX(0.08) scaleY(1.015) !important;
    filter: brightness(0.98);
    transition:
        transform 130ms cubic-bezier(0.4, 0, 0.2, 1),
        filter 130ms ease !important;
}
/* تعليق عربي: المرحلة الثانية — فتح البطاقة بعد تبديل الوجه. */
#vocabulary-stack .stack-card.stack-card--face-enter .stack-card-flip {
    animation: vocab-safe-face-enter 170ms cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes vocab-safe-face-enter {
    0% {
        transform: scaleX(0.08) scaleY(1.015);
        filter: brightness(0.98);
    }
    70% {
        transform: scaleX(1.025) scaleY(0.995);
        filter: brightness(1);
    }
    100% {
        transform: scaleX(1) scaleY(1);
        filter: none;
    }
}
/* تعليق عربي: أثناء حركة القلب لا نريد أن تتداخل حركة الوجوه مع حركة ضغط البطاقة. */
#vocabulary-stack .stack-card.stack-card--face-switching .stack-card-front,
#vocabulary-stack .stack-card.stack-card--face-switching .stack-card-back {
    transition: none !important;
}
/* تعليق عربي: دعم من يفضل تقليل الحركة. */
@media (prefers-reduced-motion: reduce) {
    #vocabulary-stack .stack-card.stack-card--face-exit .stack-card-flip,
    #vocabulary-stack .stack-card.stack-card--face-enter .stack-card-flip {
        animation: none !important;
        transition: none !important;
        transform: none !important;
        -webkit-transform: none !important;
        filter: none !important;
    }
}
/* المستوى في الزاوية اليسارية العليا — كبير على الوجهين */
.card-level-corner {
    position: absolute;
    top: 0.75rem;
    left: 0.7rem;
    right: auto;
    font-size: 1.65rem;
    font-weight: 800;
    line-height: 1;
    color: #1a1a1a;
    letter-spacing: 0.02em;
    pointer-events: none;
    z-index: 2;
    max-width: 42%;
    text-align: start;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0.5px);
    -webkit-transform: translateZ(0.5px);
}
[dir="rtl"] .card-level-corner {
    left: auto;
    right: 0.7rem;
    text-align: end;
}
/* زاوية ظهور الكلمة: جديدة أو مرات الظهور (يمين أعلى) */
.card-seen-corner {
    position: absolute;
    top: 0.75rem;
    right: 0.7rem;
    left: auto;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.2;
    color: #64748b;
    pointer-events: none;
    z-index: 2;
    max-width: 54%;
    text-align: end;
    white-space: normal;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow-wrap: anywhere;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0.5px);
    -webkit-transform: translateZ(0.5px);
}
[dir="rtl"] .card-seen-corner {
    right: auto;
    left: 0.7rem;
    text-align: start;
}
/* في Stack (المثبت dir=ltr) نثبّت المستوى يسار والحالة يمين دائمًا على الوجهين. */
.vocabulary-stack-wrap[dir="ltr"] .stack-card .card-level-corner {
    left: 0.7rem;
    right: auto;
    text-align: start;
}
.vocabulary-stack-wrap[dir="ltr"] .stack-card .card-seen-corner {
    right: 0.7rem;
    left: auto;
    text-align: end;
}
/* منطقة الكلمات في منتصف الوجه (تأخذ المساحة المتبقية؛ سكرول عند طول النص) */
.stack-card .stack-card-front-words {
    flex: 1;
    min-height: 0;
    width: 100%;
}
.stack-due-review-inline-notice {
    border: 1px solid rgba(13, 110, 253, 0.24);
    background: rgba(13, 110, 253, 0.1);
    color: #1f2937;
    border-radius: 10px;
    padding: 0.45rem 0.55rem;
    margin-bottom: 0.45rem;
}
.stack-due-review-inline-notice__text {
    display: block;
    font-size: 0.82rem;
    line-height: 1.4;
    color: #0f172a;
}
.stack-due-review-inline-notice__ok {
    margin-top: 0.35rem;
    padding: 0.15rem 0.55rem;
    font-size: 0.76rem;
    line-height: 1.2;
}
/* الكلمة في منتصف الكرت — خط كبير؛ إذا انقسمت لسطرين تظهر واصلة */
.stack-card .stack-card-front .word-de-only,
.stack-card .stack-card-front .word-ar-only {
    font-size: clamp(1.35rem, 4.2vw, 2rem);
    font-weight: 600;
    color: #1e293b;
    text-align: center;
    width: 100%;
    max-width: 100%;
    padding: 0.2rem 0;
    line-height: 1.35;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
    overflow-wrap: anywhere;
}
.stack-card .stack-card-front .front-sentence {
    display: block;
    width: 100%;
    max-width: 100%;
    font-size: clamp(1.05rem, 3.2vw, 1.45rem);
    font-weight: 500;
    color: #334155;
    margin-top: 0.65rem;
    text-align: center;
    line-height: 1.5;
    padding: 0;
    overflow-wrap: anywhere;
}
/* منطقة Flip card — مثل كرت ورق: نفس لون الوجه + خط رفيع */
.stack-card-flip-hint {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.45rem 0.5rem 0.42rem;
    width: 100%;
    text-align: center;
    background: var(--stack-card-surface-bg);
    border-top: 1px solid rgba(26, 26, 26, 0.35);
    border-radius: 0 0 7px 7px;
    z-index: 1;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0.5px);
    -webkit-transform: translateZ(0.5px);
}
.stack-card-flip-hint .btn-flip-card {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    color: #1a1a1a;
    background: transparent;
    border: none;
    cursor: pointer;
    pointer-events: none;
    user-select: none;
}
.stack-card-flip-hint .btn-flip-card i { font-size: 1.15rem; color: #1a1a1a; }
/* إخفاء "اقلب البطاقة" إلا على أول بطاقة؛ بعد التقدم تُخفى نهائياً */
.stack-card:not(.stack-card--first-only) .stack-card-flip-hint { display: none; }
.vocabulary-stack.stack-flip-hint-dismissed .stack-card-flip-hint { display: none !important; }

/* بطاقة تقرير البطاقات المكررة: تبقى في المقدمة بوضوح قبل أي بطاقة كلمة */
#vocabulary-stack .stack-card.stack-card--mismatch-notice,
#vocabulary-stack .stack-card.stack-card--mismatch-notice.vocab-card--active {
    z-index: 50 !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    top: 0 !important;
    transform: none !important;
}

#vocabulary-stack .stack-card.stack-card--mismatch-notice.vocab-card--hidden-depth {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

#vocabulary-stack .stack-card.stack-card--mismatch-notice.stack-card-removed {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    transform: none !important;
    z-index: 0 !important;
}

.stack-card--mismatch-notice .stack-card-swipe-label {
    display: none !important;
}

.stack-card--mismatch-notice .stack-card-front,
.stack-card--mismatch-notice .stack-card-back {
    background: linear-gradient(180deg, #fff8ee 0%, #ffffff 100%);
    border: 2px solid rgba(180, 83, 9, 0.45);
    box-shadow: 0 10px 28px rgba(180, 83, 9, 0.18);
}

/* Reserve a safe top zone under absolute corner badges for mismatch notice cards. */
.stack-card--mismatch-notice .stack-back-body,
.stack-card--mismatch-notice .stack-front-body {
    position: relative;
    box-sizing: border-box;
}
.stack-card--mismatch-notice .stack-back-scroll,
.stack-card--mismatch-notice .stack-front-scroll {
    box-sizing: border-box;
    padding-top: max(56px, calc(var(--stack-card-top-zone-h) + 0.35rem));
}
.stack-card.card-layout--centered.stack-card--mismatch-notice .stack-back-scroll {
    justify-content: flex-start;
}

.stack-mismatch-notice-card__content {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 0.7rem;
    padding: 0.5rem 0.2rem 0.35rem;
}

.stack-mismatch-notice-card__icon {
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #b45309;
    background: rgba(245, 158, 11, 0.12);
    font-size: 1.35rem;
}

.stack-mismatch-notice-card__text {
    font-size: 1.07rem;
    line-height: 1.7;
    color: #2b2b2b;
    font-weight: 600;
}

.stack-mismatch-notice-card__helper {
    font-size: 0.9rem;
    line-height: 1.55;
    color: #7c3f00;
}

.stack-mismatch-notice-card__level {
    font-size: 1.02rem;
    font-weight: 700;
    color: #111827;
    letter-spacing: 0.2px;
}

.stack-mismatch-level-table-wrap {
    margin-top: 0.15rem;
    border: 1px solid rgba(180, 83, 9, 0.2);
    border-radius: 0.6rem;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.25rem 0.35rem;
}

.stack-mismatch-level-table th,
.stack-mismatch-level-table td {
    font-size: 0.78rem;
    color: #3f3f46;
    padding: 0.2rem 0.3rem !important;
    vertical-align: middle;
}

.stack-mismatch-level-table thead th {
    color: #7c3f00;
    font-weight: 700;
    border-bottom: 1px solid rgba(180, 83, 9, 0.22);
}

.stack-mismatch-level-table .js-reset-level-progress {
    color: #dc3545 !important;
    font-weight: 700;
    border: 1px solid rgba(220, 53, 69, 0.45);
    border-radius: 0.45rem;
    min-width: 3.1rem;
    height: 1.7rem;
    padding: 0 0.42rem !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.18rem;
    background: rgba(220, 53, 69, 0.08);
    line-height: 1;
    font-size: 0.72rem;
    text-decoration: none !important;
}

.stack-mismatch-level-table .js-reset-level-progress:hover,
.stack-mismatch-level-table .js-reset-level-progress:focus {
    color: #b02a37 !important;
    border-color: rgba(176, 42, 55, 0.6);
    background: rgba(176, 42, 55, 0.14);
}

.stack-card--mismatch-notice .stack-back-footer,
.stack-card--mismatch-notice .stack-front-footer {
    display: flex;
    justify-content: center;
}

.vocab-reset-quick-modal .modal-content {
    border: 1px solid rgba(220, 53, 69, 0.2);
    border-top: 4px solid #dc3545;
    border-radius: 0.9rem;
    box-shadow: 0 0.9rem 2rem rgba(17, 24, 39, 0.15);
}

.vocab-reset-quick-modal .modal-header {
    border-bottom: 1px solid rgba(220, 53, 69, 0.12);
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.08), rgba(255, 255, 255, 0.95));
}

.vocab-reset-quick-modal__icon {
    width: 2rem;
    height: 2rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 53, 69, 0.12);
    color: #b02a37;
    font-size: 1rem;
}

.vocab-reset-quick-modal__message {
    color: #374151;
    line-height: 1.75;
    font-weight: 500;
}

.vocab-reset-quick-modal__levels {
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: 0.6rem;
    max-height: 190px;
    overflow: auto;
    padding: 0.4rem 0.45rem;
    background: #fff;
}

.vocab-reset-quick-modal__level-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    border-radius: 0.45rem;
    padding: 0.3rem 0.4rem;
}

.vocab-reset-quick-modal__level-item:hover {
    background: rgba(220, 53, 69, 0.06);
}

.vocab-reset-quick-modal__level-item .form-check-label {
    cursor: pointer;
    font-weight: 600;
    color: #1f2937;
}
/* صف كلمة أو جملة مع زر نطق (وجه/ظهر الكرت — ألماني، عربي، إنجليزي) */
.stack-card-line-with-speech,
.vocab-card-line-with-speech {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    margin-top: 0.35rem;
}
.stack-card-line-with-speech:first-child,
.vocab-card-line-with-speech:first-child { margin-top: 0; }
.stack-card .stack-card-front-words .stack-card-line-with-speech {
    justify-content: center;
}
/* صف ألماني + زر نطق: شبكة لتفادي الهدر الأفقي */
.stack-card .stack-card-line-de-speech {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.35rem 0.4rem;
    align-items: start;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin-top: 0.4rem;
}
.stack-card .stack-card-line-de-speech:first-child { margin-top: 0; }
.stack-card .stack-de-lemma-wrap,
.vocabulary-card-back .stack-de-lemma-wrap,
.vocab-card-line-with-speech .stack-de-lemma-wrap {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    direction: ltr;
    unicode-bidi: isolate;
    align-items: baseline;
    justify-content: center;
    gap: 0.35rem 0.5rem;
    min-width: 0;
    text-align: center;
}
.vocab-card-line-with-speech.card-back-word-de-with-article .stack-de-lemma-wrap {
    flex: 1 1 auto;
    min-width: 0;
    justify-content: center;
}
.stack-card .stack-card-line-de-speech .sentence-line {
    text-align: start;
    margin: 0;
}
.stack-card .stack-card-line-de-speech > p.sentence-line {
    width: 100%;
    min-width: 0;
}
.stack-card .stack-back-sentence .stack-back-text-line + .stack-back-text-line,
.stack-card .stack-back-sentence .stack-card-line-de-speech + .stack-back-text-line,
.stack-card .stack-back-sentence .stack-back-text-line + .stack-card-line-de-speech {
    margin-top: 0.35rem;
}
.stack-card .stack-front-text-cell {
    min-width: 0;
    width: 100%;
    text-align: center;
    justify-self: stretch;
    align-self: center;
}
.stack-card .stack-card-line-de-speech > .card-back-word-de {
    justify-self: center;
    text-align: center;
    width: 100%;
    max-width: 100%;
    display: block;
}
.stack-card .stack-back-text-line {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin-top: 0.35rem;
    padding: 0 0.1rem;
    overflow-wrap: anywhere;
    word-break: normal;
}
.stack-card .stack-back-text-line:first-child { margin-top: 0; }
.stack-card .stack-front-translation-slot {
    width: 100%;
}
.stack-card .stack-front-translation-placeholder {
    visibility: hidden;
    pointer-events: none;
    user-select: none;
}
.stack-card .stack-front-audio-placeholder,
.stack-card .stack-front-footer-placeholder {
    visibility: hidden;
    pointer-events: none;
    user-select: none;
}
.stack-card-line-with-speech .word-de-only,
.stack-card-line-with-speech .word-ar-only,
.stack-card-line-with-speech .front-sentence,
.stack-card-line-with-speech .card-back-word-de,
.stack-card-line-with-speech .card-back-word-ar,
.stack-card-line-with-speech .card-back-word-en,
.stack-card-line-with-speech .sentence-line,
.vocab-card-line-with-speech .word-de-only,
.vocab-card-line-with-speech .word-ar-only,
.vocab-card-line-with-speech .front-sentence,
.vocab-card-line-with-speech .card-back-word-de,
.vocab-card-line-with-speech .card-back-word-ar,
.vocab-card-line-with-speech .card-back-word-en,
.vocab-card-line-with-speech .sentence-line {
    flex: 1;
    min-width: 0;
    margin: 0;
}
.vocabulary-card-front .vocab-card-line-with-speech,
.vocabulary-card-back .card-back-words .vocab-card-line-with-speech,
.vocabulary-card-back .card-back-sentence .vocab-card-line-with-speech {
    justify-content: center;
}
/* زر النطق: منطقة لمس لا تقل عن 44px لسهولة الضغط (أصابع كبيرة أو لمس) — لون محايد متناسق مع خلفية الكرت (لا أزرق) */
.vocabulary-list .vocab-speech-btn,
.vocabulary-list .wotd-speech-btn.vocab-speech-btn {
    min-width: 44px;
    min-height: 44px;
    padding: 0.35rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(0, 0, 0, 0.06) !important;
    border: 1px solid rgba(0, 0, 0, 0.12) !important;
    border-radius: 50%;
    box-shadow: none !important;
    color: #444 !important;
}
.vocabulary-list .vocab-speech-btn:hover,
.vocabulary-list .wotd-speech-btn.vocab-speech-btn:hover {
    background: rgba(0, 0, 0, 0.1) !important;
    border-color: rgba(0, 0, 0, 0.18) !important;
    color: #1a1a1a !important;
}
.vocabulary-list .vocab-speech-btn.playing,
.vocabulary-list .wotd-speech-btn.vocab-speech-btn.playing {
    background: rgba(0, 0, 0, 0.12) !important;
    border-color: rgba(0, 0, 0, 0.2) !important;
}
.vocabulary-list .vocab-speech-btn .las {
    font-size: 1.25rem;
    line-height: 1;
}
/* كومة السحب: أزرار أصغر لتوفير عرض دون المساس بقابلية اللمس */
.stack-card .vocab-speech-btn,
.stack-card .wotd-speech-btn.vocab-speech-btn {
    min-width: 36px;
    min-height: 36px;
    padding: 0.22rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(0, 0, 0, 0.06) !important;
    border: 1px solid rgba(0, 0, 0, 0.12) !important;
    border-radius: 50%;
    box-shadow: none !important;
    color: #444 !important;
}
.stack-card .vocab-speech-btn:hover,
.stack-card .wotd-speech-btn.vocab-speech-btn:hover {
    background: rgba(0, 0, 0, 0.1) !important;
    border-color: rgba(0, 0, 0, 0.18) !important;
    color: #1a1a1a !important;
}
.stack-card .vocab-speech-btn.playing,
.stack-card .wotd-speech-btn.vocab-speech-btn.playing {
    background: rgba(0, 0, 0, 0.12) !important;
    border-color: rgba(0, 0, 0, 0.2) !important;
}
.stack-card .vocab-speech-btn .las {
    font-size: 1.02rem;
    line-height: 1;
}
/* تذييل المكدس: أزرار بألوان الهوية (#B60000) — انظر `.btn-report-error-outside` */
.stack-footer-report { min-height: 2rem; position: relative; z-index: 5; }
.stack-focus-backdrop[hidden] { display: none !important; }
.vocab-flashcard-study-stage {
    position: relative;
    z-index: 20;
    overscroll-behavior: contain;
}
.stack-undo-btn { display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 500; opacity: 0.92; }
.stack-undo-btn:hover:not(:disabled) { opacity: 1; }
.stack-undo-btn:disabled { opacity: 0.55; cursor: not-allowed; }
.stack-expand-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    font-weight: 600;
    white-space: normal;
}
.stack-expand-btn .stack-expand-btn__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.stack-expand-btn .stack-expand-btn__label {
    display: inline-block;
    line-height: 1.15;
}
.stack-expand-btn.is-expanded {
    color: #B60000 !important;
    background: #fff !important;
    border-color: #B60000 !important;
}
.stack-expand-btn.is-expanded:hover:not(:disabled) {
    background: rgba(182, 0, 0, 0.06) !important;
}
/* Expand control: brand red when offering expand (collapsed mode) */
.vocabulary-index-page #stack-expand-btn:not(.is-expanded),
.vocabulary-index-page .vocab-stack-expand-below-wrap .stack-expand-btn:not(.is-expanded) {
    border-color: #B60000 !important;
    background: #B60000 !important;
    color: #fff !important;
}
.vocabulary-index-page #stack-expand-btn:not(.is-expanded):hover:not(:disabled),
.vocabulary-index-page #stack-expand-btn:not(.is-expanded):focus-visible:not(:disabled),
.vocabulary-index-page .vocab-stack-expand-below-wrap .stack-expand-btn:not(.is-expanded):hover:not(:disabled),
.vocabulary-index-page .vocab-stack-expand-below-wrap .stack-expand-btn:not(.is-expanded):focus-visible:not(:disabled) {
    filter: brightness(0.95);
}

.vocab-stack-expand-below-wrap {
    position: absolute;
    top: var(--vocab-stack-card-h, 448px);
    left: 0;
    right: 0;
    z-index: 35;
    display: flex;
    justify-content: center;
    margin: 0;
    transform: none;
    width: 100%;
}

/* علامة مائية براند مثل التقرير — خط مزخرف (Unicode script) */
.card-brand-watermark {
    position: absolute;
    bottom: 0.42rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, "Times New Roman", serif;
    font-weight: 900;
    font-size: 0.68rem;
    letter-spacing: 0.5px;
    color: #2d2a26;
    opacity: 0.2;
    pointer-events: none;
    white-space: nowrap;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6), 0 6px 14px rgba(182,0,0,0.12);
}
.stack-card .card-brand-watermark {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateX(-50%) translateZ(0.5px);
    -webkit-transform: translateX(-50%) translateZ(0.5px);
}
.stack-card.card-layout--centered .stack-card-front-words,
.stack-card.card-layout--centered .stack-back-scroll {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.stack-card.card-layout--compact {
    --stack-card-top-zone-h: 2.95rem;
    --stack-card-bottom-zone-h: 1.2rem;
}
.stack-card.card-layout--compact .stack-card-front,
.stack-card.card-layout--compact .stack-card-back {
    padding: 0.42rem 0.34rem 0.28rem;
}
.stack-card.card-layout--compact .stack-card-front-words,
.stack-card.card-layout--compact .stack-back-scroll {
    justify-content: flex-start;
}
.stack-card.card-layout--compact .stack-back-body {
    gap: 0.1rem;
}
/* compact + back-centered: flex needed (centered rule does not apply when compact) */
.stack-card.card-layout--compact.card-layout--back-centered .stack-back-scroll {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.stack-card.card-layout--compact .stack-back-footer {
    margin-top: 0.1rem;
}
.stack-card.card-layout--compact .stack-card-flip-hint {
    padding-top: 0.4rem;
    padding-bottom: 0.35rem;
}
.stack-card.card-layout--compact .card-brand-watermark {
    opacity: 0.16;
}
.stack-card .stack-back-words {
    width: 100%;
    text-align: center;
    overflow-wrap: anywhere;
    word-break: normal;
}
.stack-card .stack-card-front-words,
.stack-card .stack-back-sentence {
    overflow-wrap: anywhere;
    word-break: normal;
}
.stack-card .stack-front-lemma-block,
.stack-card .stack-front-text-cell {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: center;
    gap: 0.15rem;
    min-width: 0;
    text-align: center;
}
.stack-card .stack-de-lemma-wrap {
    display: inline-flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: center;
    gap: 0.2rem;
}
.stack-card .card-back-plural {
    display: inline;
    margin-top: 0;
    font-size: inherit;
    font-weight: 600;
    line-height: inherit;
    color: #64748b;
}
.stack-card .card-back-plural__sep {
    margin-inline: 0.12em;
    color: #94a3b8;
    font-weight: 600;
}
.stack-card .card-back-plural__label {
    display: none;
}
.stack-card .card-back-plural__value {
    color: #475569;
    font-weight: 600;
}
.stack-card .stack-back-words .card-back-word-de {
    font-size: clamp(1.35rem, 4vw, 1.95rem);
    font-weight: 700;
    color: #0f172a;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
    margin-bottom: 0;
    line-height: 1.35;
    letter-spacing: -0.02em;
    overflow-wrap: anywhere;
}
.stack-card .stack-de-lemma-wrap .card-back-word-de,
.vocabulary-card-back .stack-de-lemma-wrap .card-back-word-de,
.vocab-card-line-with-speech .stack-de-lemma-wrap .card-back-word-de {
    display: inline;
}
.stack-card .stack-back-words .card-back-article,
.stack-card .stack-card-front-words .card-back-article {
    font-size: clamp(1.15rem, 3.2vw, 1.45rem);
    font-weight: 700;
    color: #0f172a;
    letter-spacing: 0.02em;
    text-transform: lowercase;
}
.stack-card .stack-back-words .card-back-word-ar {
    font-size: clamp(1.15rem, 3.5vw, 1.65rem);
    font-weight: 600;
    color: #b60000;
    line-height: 1.45;
    margin-top: 0.25rem;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
}
.stack-card .stack-back-words .card-back-word-en {
    font-size: clamp(1rem, 2.8vw, 1.2rem);
    font-weight: 500;
    color: #b60000;
    line-height: 1.45;
    margin-top: 0.2rem;
    overflow-wrap: anywhere;
}
.stack-card .stack-back-sentence {
    margin-top: 0.45rem;
    padding-top: 0.4rem;
    border-top: 1px solid #e2e8f0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}
.stack-card .stack-back-sentence .sentence-line {
    font-size: clamp(1.05rem, 3vw, 1.2rem);
    line-height: 1.5;
    color: #334155;
    overflow-wrap: anywhere;
}
.stack-card .stack-back-sentence .stack-back-text-line {
    color: #b60000;
}
.stack-card .stack-back-sentence .sentence-line strong {
    font-weight: 700;
    font-size: inherit;
}
.stack-card .stack-back-verb-forms {
    margin-top: 0 !important;
    padding-top: 0.35rem !important;
    border-top: none !important;
}
/* عمود Perfekt أوسع عند وجود ثلاثة أعمدة فقط */
.stack-back-verb-forms .verb-forms-table thead th:nth-child(3),
.stack-back-verb-forms .verb-forms-table tbody td:nth-child(3) {
    width: 42%;
}

/* عرض الشبكة: نفس خلفية بطاقة السحب + قلب مسطح لإظهار الترجمة */
#vocabulary-grid-wrap .vocabulary-card-wrapper {
    --stack-card-face-bg: #f2ede4;
    --stack-card-back-bg: var(--stack-card-face-bg);
}

#vocabulary-grid-wrap .vocabulary-card-front {
    background: var(--stack-card-face-bg, #f2ede4);
    border: 1px solid #1a1a1a;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.1);
}

#vocabulary-grid-wrap .vocabulary-card-back {
    background: var(--stack-card-back-bg, #f2ede4);
    border: 1px solid #1a1a1a;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.1);
}

#vocabulary-grid-wrap .vocabulary-card-back .card-back-word-ar,
#vocabulary-grid-wrap .vocabulary-card-back .card-back-word-en {
    font-weight: 600;
    color: #b60000;
}

.vocabulary-card-wrapper.vocabulary-card--flat-flip .vocabulary-card-inner,
.vocabulary-card-wrapper.vocabulary-card--flat-flip.flipped .vocabulary-card-inner {
    transform: none !important;
    -webkit-transform: none !important;
    transform-style: flat !important;
    -webkit-transform-style: flat !important;
    transition: none;
}

.vocabulary-card-wrapper.vocabulary-card--flat-flip .vocabulary-card-front,
.vocabulary-card-wrapper.vocabulary-card--flat-flip .vocabulary-card-back {
    transform-origin: center center;
    -webkit-transform-origin: center center;
    backface-visibility: visible !important;
    -webkit-backface-visibility: visible !important;
    transition: opacity 0.2s ease, transform 0.26s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.vocabulary-card-wrapper.vocabulary-card--flat-flip .vocabulary-card-front {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    -webkit-transform: none !important;
    pointer-events: auto !important;
    z-index: 2;
}

.vocabulary-card-wrapper.vocabulary-card--flat-flip .vocabulary-card-back {
    opacity: 0 !important;
    visibility: hidden !important;
    transform: none !important;
    -webkit-transform: none !important;
    pointer-events: none !important;
    z-index: 1;
}

.vocabulary-card-wrapper.vocabulary-card--flat-flip.flipped .vocabulary-card-front {
    opacity: 0 !important;
    visibility: hidden !important;
    transform: none !important;
    -webkit-transform: none !important;
    pointer-events: none !important;
    z-index: 1;
}

.vocabulary-card-wrapper.vocabulary-card--flat-flip.flipped .vocabulary-card-back {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    -webkit-transform: none !important;
    pointer-events: auto !important;
    z-index: 2;
}

/* عرض الشبكة: إبقاء النص داخل البطاقة */
#vocabulary-grid-wrap .vocabulary-card-wrapper,
#vocabulary-grid-wrap .vocabulary-card-inner,
#vocabulary-grid-wrap .vocabulary-card-front,
#vocabulary-grid-wrap .vocabulary-card-back {
    overflow: hidden;
}

#vocabulary-grid-wrap .vocabulary-card-front,
#vocabulary-grid-wrap .vocabulary-card-back {
    padding-top: 2.2rem;
}

#vocabulary-grid-wrap .vocabulary-card-back .card-back-content {
    min-height: 0;
    height: 100%;
    overflow: hidden;
    justify-content: flex-start;
    padding-bottom: 0.55rem;
}

#vocabulary-grid-wrap .vocabulary-card-back .card-back-center {
    flex: 1 1 auto;
    min-height: 0;
    width: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    align-items: center;
    padding: 0.15rem 0 0.35rem;
    scrollbar-gutter: stable;
}

#vocabulary-grid-wrap .vocabulary-card-back .vocabulary-card-actions {
    flex: 0 0 auto;
    flex-shrink: 0;
    width: 100%;
    margin-top: auto;
    position: relative;
    z-index: 3;
    background: var(--stack-card-back-bg, #f2ede4);
    box-shadow: 0 -10px 14px rgba(242, 237, 228, 0.96);
}

#vocabulary-grid-wrap .vocabulary-card-front .word-de-only,
#vocabulary-grid-wrap .vocabulary-card-front .word-ar-only,
#vocabulary-grid-wrap .vocabulary-card-back .card-back-word-de,
#vocabulary-grid-wrap .vocabulary-card-back .card-back-word-ar,
#vocabulary-grid-wrap .vocabulary-card-back .card-back-word-en,
#vocabulary-grid-wrap .vocabulary-card-back .card-back-article {
    box-sizing: border-box;
    max-width: 100%;
    overflow-wrap: anywhere;
    word-break: break-word;
    font-size: clamp(0.95rem, 2.35vw, 1.55rem);
    line-height: 1.22;
    padding-left: 0.2rem;
    padding-right: 0.2rem;
}

#vocabulary-grid-wrap .vocabulary-card-front .front-sentence,
#vocabulary-grid-wrap .vocabulary-card-back .sentence-line {
    box-sizing: border-box;
    max-width: 100%;
    overflow-wrap: anywhere;
    word-break: break-word;
    font-size: clamp(0.82rem, 1.85vw, 1.05rem);
    line-height: 1.32;
}

#vocabulary-grid-wrap .vocab-card-line-with-speech,
#vocabulary-grid-wrap .card-back-word-de-with-article {
    max-width: 100%;
}

#vocabulary-grid-wrap .vocab-card-line-with-speech {
    flex-wrap: wrap;
    justify-content: center;
}

#vocabulary-grid-wrap .vocabulary-card-back .card-back-sentence {
    margin-top: 0.35rem;
    padding-top: 0.5rem;
}

#vocabulary-grid-wrap .vocabulary-card-back .card-back-content {
    padding-inline: 0.85rem;
}

#vocabulary-grid-wrap .vocab-speech-btn,
#vocabulary-grid-wrap .wotd-speech-btn.vocab-speech-btn {
    width: 38px !important;
    height: 38px !important;
    min-width: 38px !important;
    min-height: 38px !important;
}

#vocabulary-grid-wrap .vocabulary-card-actions .btn {
    min-height: 46px;
    font-size: 0.84rem;
    padding: 0.4rem 0.32rem;
}

#vocabulary-grid-wrap .vocabulary-card-actions .btn-label-two-lines,
#vocabulary-grid-wrap .vocabulary-card-actions .btn-vocab-with-label .btn-learned-label {
    font-size: 0.82em;
}

.vocabulary-grid-toolbar .stack-undo-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

/* عرض الشبكة: ديسكتوب — إخفاء البطاقة المُجاب عنها مع الإبقاء على مكانها في الشبكة */
@media (min-width: 768px) {
    #vocabulary-grid-wrap .vocabulary-grid-col.vocabulary-grid-card-answered {
        visibility: hidden;
        pointer-events: none;
    }

    #vocabulary-grid-wrap .vocabulary-grid-col.vocabulary-grid-card-answered .vocabulary-card-wrapper {
        opacity: 0;
    }
}

/* عرض الشبكة: موبايل — إزالة البطاقة من التدفق (السلوك السابق) */
@media (max-width: 767.98px) {
    #vocabulary-grid-wrap .vocabulary-grid-col.vocabulary-grid-card-answered {
        display: none !important;
    }
}