/* ==========================================================================
   Product Details Styles (productDetails.css)
   تصميم عصري، متجاوب بالكامل مع جميع أحجام الشاشات، ومُحسّن للأجهزة الضعيفة
   ========================================================================== */

#product-detail-page .page-body {
    padding: 0;
    padding-bottom: 90px; /* مساحة لزر الشراء السفلي */
}

/* ---------------------------------------------------------
   حاوية الصورة الرئيسية
--------------------------------------------------------- */
.pd-image-container {
    width: 100%;
    height: 46vh;
    max-height: 460px;
    min-height: 320px;
    background-color: var(--border);
    position: relative;
}

.pd-image-container .image-container-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    contain: layout paint size; /* تحسين أداء الرسم على الأجهزة الضعيفة */
}

.pd-image-container .image-container-wrapper img {
    object-fit: contain !important;
    background-color: var(--bg-card);
}

.pd-image-container::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    height: 30%;
    background: linear-gradient(to top, var(--bg-body), transparent);
    z-index: 3;
    pointer-events: none;
}

/* ---------------------------------------------------------
   محتوى المنتج
--------------------------------------------------------- */
.pd-content {
    padding: 28px 22px 10px;
    background: var(--bg-body);
    border-top-left-radius: 28px;
    border-top-right-radius: 28px;
    margin-top: -28px;
    position: relative;
    z-index: 4;
    box-shadow: 0 -10px 20px rgba(0,0,0,0.05);
}

#pd-name {
    font-size: 1.35rem;
    font-weight: 900;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--text-main);
    letter-spacing: -0.2px;
}

#pd-desc {
    color: var(--text-muted);
    font-size: 1.02rem;
    line-height: 1.85;
    margin: 18px 0 8px;
}

/* شريحة التاجر */
.pd-merchant-chip {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 12px 15px;
    border-radius: 16px;
    margin: 15px 0 20px 0;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.pd-merchant-chip:hover {
    background: rgba(0, 0, 0, 0.02);
    transform: translateY(-2px);
}
.dark-mode .pd-merchant-chip:hover {
    background: rgba(255, 255, 255, 0.02);
}

.pd-merchant-chip .chip-top {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.pd-merchant-chip .chip-icon {
    color: var(--primary);
    font-size: 0.85rem;
}

.pd-merchant-chip .chip-name {
    font-size: 1rem;
    font-weight: 900;
    color: var(--text-main);
}

.pd-merchant-chip .chip-bottom {
    display: flex;
    justify-content: flex-end;
    margin-top: 4px;
    width: 100%;
}

.pd-merchant-chip .chip-username {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 6px;
    direction: ltr;
    display: inline-block;
}

/* ---------------------------------------------------------
   قسم المنتجات ذات الصلة (من نفس شجرة الفئات)
--------------------------------------------------------- */
.related-products-section {
    padding: 8px 0 10px;
    background: var(--bg-body);
    content-visibility: auto;
    contain-intrinsic-size: 1px 320px;
}

.related-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px 16px;
}

.related-products-section h3 {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.related-products-section h3 i {
    color: var(--primary);
    font-size: 1.05rem;
}

/* ---------------------------------------------------------
   الهيدر الشفاف
--------------------------------------------------------- */
.dark-mode #product-detail-page .page-header button {
    background: rgba(30, 41, 59, 0.85) !important;
    border-color: rgba(255,255,255,0.1) !important;
}

#product-detail-page .page-header {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    z-index: 100 !important;
}

#product-detail-page .page-body {
    margin-top: 0 !important;
    padding-top: 0 !important;
}

/* ----------------------------------
   تأثير التحميل الهيكلي (Shimmer Effects)
------------------------------------- */
.pd-skeleton-shimmer {
    background: linear-gradient(90deg, var(--border) 25%, rgba(255,255,255,0.15) 37%, var(--border) 63%);
    background-size: 400% 100%;
    animation: pd-shimmer-anim 1.4s ease infinite;
}
.dark-mode .pd-skeleton-shimmer {
    background: linear-gradient(90deg, var(--bg-card) 25%, rgba(255,255,255,0.04) 37%, var(--bg-card) 63%);
    background-size: 400% 100%;
}
@keyframes pd-shimmer-anim {
    0% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@media (prefers-reduced-motion: reduce) {
    .pd-skeleton-shimmer { animation: none; opacity: 0.6; }
    .pd-merchant-chip, .options-bottom-sheet, .sheet-overlay, #main-buy-btn { transition: none !important; }
}

/* ----------------------------------
   النافذة المنبثقة للخيارات (Bottom Sheet)
------------------------------------- */
.sheet-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 1390 !important;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.options-bottom-sheet {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--bg-body);
    z-index: 1400 !important;
    border-top-left-radius: 25px;
    border-top-right-radius: 25px;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.1);
    box-shadow: 0 -10px 25px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    max-height: 85vh;
}
.sheet-overlay.active {
    opacity: 1;
    visibility: visible;
}

.options-bottom-sheet.active {
    transform: translateY(0);
}

.sheet-header {
    padding: 20px 25px 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}
.sheet-header h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--text-main);
}
.sheet-close-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    width: 35px; height: 35px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-main);
    cursor: pointer;
}

.sheet-content {
    padding: 20px 25px;
    overflow-y: auto;
}

.sheet-product-preview {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    align-items: center;
}
.sheet-product-preview img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: opacity 0.2s ease;
}
.sheet-product-info {
    display: flex;
    flex-direction: column;
}
.sheet-price {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--primary);
}

#sheet-options-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.option-chip {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 46px;
    padding: 0 18px;
    margin: 0;
    border: 2px solid var(--border);
    border-radius: 13px;
    cursor: pointer;
    font-weight: 800;
    font-size: 0.95rem;
    color: var(--text-main);
    background: var(--bg-card);
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}
.option-chip:active {
    transform: scale(0.94);
}
.option-chip.selected {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 16px rgba(79,70,229,0.3);
}
@media (hover: hover) {
    .option-chip:hover {
        border-color: var(--primary);
    }
}

.sheet-footer {
    padding: 15px 25px 25px;
    border-top: 1px solid var(--border);
    background: var(--bg-body);
    padding-bottom: 90px !important;
}

/* =========================================================================
   التوافق مع الأجهزة اللوحية والشاشات الكبيرة (تابلت وديسكتوب)
   ========================================================================= */
@media (min-width: 860px) {
    #product-detail-page .page-body {
        display: grid;
        grid-template-columns: minmax(320px, 460px) 1fr;
        grid-template-areas:
            "img content"
            "related related";
        column-gap: 50px;
        max-width: 1120px;
        margin: 0 auto;
        padding: 100px 30px 40px;
        align-items: center;
    }

    .pd-image-container {
        grid-area: img;
        height: 480px;
        max-height: none;
        min-height: 0;
        border-radius: 24px;
        overflow: hidden;
        position: sticky;
        top: 100px;
        box-shadow: var(--shadow-sm);
    }

    .pd-image-container::after { display: none; }

    .pd-content {
        grid-area: content;
        margin-top: 0;
        border-radius: 0;
        box-shadow: none;
        border: none;
        padding: 0 10px;
        background: transparent;
    }

    #pd-name { font-size: 1.7rem; margin-top: 8px; }
    #pd-desc { font-size: 1.05rem; }

    .pd-merchant-chip {
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 12px 0;
    }

    .related-products-section {
        grid-area: related;
        padding-top: 10px;
    }
    .related-section-head { padding: 0 0 16px; }

    /* زر إضافة إلى السلة يصبح زرًا عائمًا على يسار الشاشة في وضع الشاشات الكبيرة */
    #product-detail-page .page-footer {
        position: fixed;
        top: auto;
        bottom: 30px;
        left: 30px;
        right: auto;
        width: auto;
        max-width: 340px;
        margin: 0;
        border-radius: 18px;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
    }

    #product-detail-page .page-footer #main-buy-btn {
        width: 280px;
    }
}

@media (min-width: 1280px) {
    #product-detail-page .page-body {
        max-width: 1280px;
        column-gap: 70px;
    }
}

@media (min-width: 768px) {
    .options-bottom-sheet {
        top: 50%;
        left: 50%;
        bottom: auto;
        right: auto;
        width: 450px;
        border-radius: 20px;
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.1), opacity 0.25s ease, visibility 0.25s ease;
    }
    .options-bottom-sheet.active {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 360px) {
    .pd-content { padding: 22px 16px 10px; }
    #pd-name { font-size: 1.2rem; }
}