/* ============================================================
   خوارزميات — قسم «المكتبة الإلكترونية» في الرئيسية (تحت الهيرو)
   رفّ كتب ثلاثي الأبعاد يتبع المؤشر، بهوية «نسيج المعرفة»
   يعتمد متغيرات khw-theme.css (الأخضر/الكحلي/البرتقالي)
   ============================================================ */

.khw-libh {
    position: relative;
    padding: 92px 0 108px;
    background:
        radial-gradient(120% 80% at 50% -12%, rgba(46, 185, 126, 0.12), transparent 62%),
        linear-gradient(180deg, #ffffff 0%, var(--khw-surface, #f6faf7) 100%);
    overflow: hidden;
    isolation: isolate;
}

/* نسيج نقاط خفيف يتلاشى للأسفل */
.khw-libh::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(22, 50, 79, 0.05) 1px, transparent 1px);
    background-size: 22px 22px;
    -webkit-mask-image: radial-gradient(120% 66% at 50% 0%, #000, transparent 72%);
    mask-image: radial-gradient(120% 66% at 50% 0%, #000, transparent 72%);
    opacity: 0.55;
    pointer-events: none;
    z-index: 0;
}

/* خيط برتقالي رفيع أعلى القسم يربطه بحافّة الهيرو الداكن فوقه */
.khw-libh::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(270deg,
            transparent 0%,
            rgba(255, 159, 69, 0.5) 20%,
            rgba(46, 185, 126, 0.65) 50%,
            rgba(255, 159, 69, 0.5) 80%,
            transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.khw-libh > .container {
    position: relative;
    z-index: 2;
}

/* ---------- رأس القسم ---------- */
.khw-libh__head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 22px;
    flex-wrap: wrap;
    margin-bottom: 52px;
}

.khw-libh__all {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 15px;
    color: var(--khw-navy, #16324f);
    background: #fff;
    border: 1.5px solid rgba(46, 185, 126, 0.28);
    box-shadow: var(--khw-shadow-soft, 0 18px 40px -16px rgba(22, 50, 79, 0.18));
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), background 0.35s ease, color 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
    white-space: nowrap;
}

.khw-libh__all i {
    color: var(--khw-green, #2eb97e);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), color 0.35s ease;
}

.khw-libh__all:hover {
    color: #fff;
    background: linear-gradient(135deg, var(--khw-green, #2eb97e), #22a06c);
    border-color: transparent;
    box-shadow: 0 18px 34px -12px rgba(46, 185, 126, 0.6);
    transform: translateY(-2px);
}

.khw-libh__all:hover i {
    color: #fff;
    transform: translateX(-6px);
}

/* ---------- شبكة الكتب ---------- */
.khw-libh__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 38px 26px;
}

@media (min-width: 576px) {
    .khw-libh__grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 768px) {
    .khw-libh__grid { grid-template-columns: repeat(4, 1fr); gap: 42px 30px; }
}

@media (min-width: 1200px) {
    .khw-libh__grid { grid-template-columns: repeat(5, 1fr); }
}

/* ---------- بطاقة الكتاب ثلاثية الأبعاد ---------- */
.khw-libh__card {
    perspective: 1150px;
    display: flex;
    flex-direction: column;
}

.khw-libh__book {
    position: relative;
    display: block;
    transform-style: preserve-3d;
    /* وضع الراحة: ميلٌ طفيف يُظهر كعب الكتاب (يمين = تجليد العربية) */
    transform: rotateX(var(--rx, 0deg)) rotateY(calc(-6deg + var(--ry, 0deg)));
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.khw-libh__frame {
    position: relative;
    display: block;
    aspect-ratio: 4 / 5;
    border-radius: 8px 14px 14px 8px; /* حافة يسرى أحدّ (حرف الصفحات) */
    overflow: hidden;
    background: #082418;
    box-shadow:
        0 2px 4px rgba(22, 50, 79, 0.12),
        0 20px 36px -16px rgba(22, 50, 79, 0.45),
        inset 0 0 0 1px rgba(255, 255, 255, 0.06);
    transition: box-shadow 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.khw-libh__card:hover .khw-libh__frame {
    box-shadow:
        0 6px 12px rgba(22, 50, 79, 0.16),
        0 40px 66px -20px rgba(46, 185, 126, 0.5),
        inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

/* خلفية مموّهة من الغلاف نفسه لملء الإطار مهما كانت نسبة الصورة */
.khw-libh__bg {
    position: absolute;
    inset: -12%;
    width: 124%;
    height: 124%;
    object-fit: cover;
    filter: blur(20px) saturate(1.35) brightness(0.72);
    transform: scale(1.1);
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 0;
}

/* الغلاف الكامل (contain) — لا يُقصّ أبداً */
.khw-libh__cover {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    z-index: 2;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.khw-libh__card:hover .khw-libh__cover { transform: scale(1.045); }
.khw-libh__card:hover .khw-libh__bg { transform: scale(1.18); }

/* كعب التجليد على اليمين + حرف الصفحات على اليسار */
.khw-libh__spine {
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
    background:
        /* كعب داكن يمين */
        linear-gradient(90deg,
            transparent 86%,
            rgba(0, 0, 0, 0.05) 90%,
            rgba(0, 0, 0, 0.32) 96%,
            rgba(255, 255, 255, 0.14) 99%,
            rgba(0, 0, 0, 0.28) 100%),
        /* حرف صفحات فاتح يسار */
        linear-gradient(90deg,
            rgba(255, 255, 255, 0.55) 0%,
            rgba(255, 255, 255, 0.12) 2.2%,
            transparent 5%);
}

/* لمعان قطري ينساب عند المرور */
.khw-libh__shine {
    position: absolute;
    inset: 0;
    z-index: 4;
    pointer-events: none;
    background: linear-gradient(115deg,
            transparent 32%,
            rgba(255, 255, 255, 0.38) 46%,
            rgba(255, 255, 255, 0.06) 56%,
            transparent 70%);
    transform: translateX(-125%);
    transition: transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

.khw-libh__card:hover .khw-libh__shine { transform: translateX(125%); }

/* شارة «قابل للتصفّح» */
.khw-libh__badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 5;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 11px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--khw-orange, #ff9f45), var(--khw-orange-2, #f28c38));
    box-shadow: 0 8px 16px -6px rgba(242, 140, 56, 0.7);
    transform: translateY(0);
    transition: transform 0.35s ease;
}

.khw-libh__badge i { font-size: 11px; }
.khw-libh__card:hover .khw-libh__badge { transform: translateY(-2px); }

/* ---------- بيانات الكتاب أسفل الغلاف ---------- */
.khw-libh__meta {
    padding: 17px 3px 0;
    text-align: right;
    direction: rtl;
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
}

.khw-libh__meta h3 {
    font-size: 15.5px;
    line-height: 1.55;
    font-weight: 800;
    margin: 0 0 11px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.95em;
}

.khw-libh__meta h3 a {
    color: var(--khw-navy, #16324f);
    transition: color 0.25s ease;
}

.khw-libh__meta h3 a:hover { color: var(--khw-green, #2eb97e); }

.khw-libh__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto; /* يثبّت السعر/الزر أسفل البطاقة فتتساوى المحاذاة رغم اختلاف طول العناوين */
}

.khw-libh__price {
    font-weight: 800;
    color: var(--khw-green, #2eb97e);
    font-size: 18px;
    white-space: nowrap;
}

.khw-libh__price .khw-libh__from {
    font-size: 11px;
    font-weight: 600;
    color: var(--khw-ink, #22343c);
    opacity: 0.7;
    margin-left: 3px;
}

.khw-libh__price small {
    font-size: 11px;
    font-weight: 600;
    margin-right: 2px;
    color: var(--khw-ink, #22343c);
    opacity: 0.7;
}

.khw-libh__cart {
    flex: none;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 15px;
    background: linear-gradient(135deg, var(--khw-navy, #16324f), var(--khw-navy-2, #1f4068));
    box-shadow: 0 8px 16px -6px rgba(22, 50, 79, 0.5);
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), background 0.3s ease, box-shadow 0.3s ease;
}

.khw-libh__cart:hover {
    color: #fff;
    background: linear-gradient(135deg, var(--khw-green, #2eb97e), #22a06c);
    transform: translateY(-2px);
    box-shadow: 0 13px 22px -6px rgba(46, 185, 126, 0.6);
}

.khw-libh__cart:active { transform: translateY(0); }

/* ---------- لمسات نهائية / وصول ---------- */
@media (max-width: 575px) {
    .khw-libh { padding: 64px 0 76px; }
    .khw-libh__head { margin-bottom: 34px; }
    .khw-libh__meta h3 { font-size: 14px; }
}

/* احترام تقليل الحركة: أوقف الميلان والانسياب */
@media (prefers-reduced-motion: reduce) {
    .khw-libh__book { transform: none !important; transition: none; }
    .khw-libh__shine { display: none; }
}