/* =================================================================
 * COMMON & REUSABLE COMPONENTS (Optimized Version)
 * ================================================================= */

/* --- 1. Titles & Headers --- */
.sbmalpha-title-wrapper {
    text-align: center;
    transition: all 0.4s ease;
    margin: 0 0 2.5rem 0 !important; /* Shorthand margin */
    padding-top: 0 !important;
    min-height: 80px; 
}
.sbmalpha-title-link { text-decoration: none; cursor: pointer; }
.sbmalpha-title {
    font-size: 3rem; font-weight: 300 !important; color: #1f2937;
    white-space: nowrap; transition: color 0.5s ease;
    line-height: 1.1; margin: 0; letter-spacing: 0.05em;
}
.sbmalpha-version {
    font-size: 0.7rem; font-weight: 300; color: var(--sbm-primary-color);
    vertical-align: super; margin-left: 0.25rem; position: relative; top: -0.6rem;
}
.sbm-page-main-title {
    font-size: 1.25rem; font-weight: 400; color: #4b5563;
    margin-top: 0.5rem; line-height: 1.2; text-transform: capitalize;
}
.sbmalpha-container.sbmalpha-bg-image .sbmalpha-title,
.sbmalpha-container.sbmalpha-bg-image .sbm-page-main-title {
    color: #fff; text-shadow: 1px 1px 4px rgba(0,0,0,0.6);
}
@media (max-width: 768px) {
    .sbmalpha-title-wrapper { margin: 4rem 0 2rem 0 !important; }
    .sbmalpha-title { font-size: 2rem; }
    .sbm-page-main-title { font-size: 1.1rem; }
    .sbmalpha-version { font-size: 1rem; top: -1rem; }
}

/* --- 2. Generic Buttons & Links --- */
.sbm-btn, .sbm-popup-btn {
    flex: 1; padding: 1rem; font-size: 1rem; font-weight: 600;
    border-radius: 8px; text-align: center; text-decoration: none;
    cursor: pointer; border: 2px solid transparent; transition: all 0.2s;
    display: flex; align-items: center; justify-content: center;
}

/* [GỘP CHUNG] Nút Thêm Vào Giỏ - CHỐNG FLATSOME GHI ĐÈ */
button.sbm-btn.add-to-cart,
button.sbm-card-add-to-cart-btn,
.sbm-product-actions button.add-to-cart,
.sbm-result-card button.sbm-card-add-to-cart-btn {
    background: #ef4444 !important; 
    background-color: #ef4444 !important;
    color: #ffffff !important; 
    font-size: 1.1rem !important; 
    font-weight: 700 !important;
    text-transform: uppercase !important; 
    letter-spacing: 0.5px !important;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3) !important;
    border: none !important; 
    border-radius: 8px !important; /* Đập vỡ viền bo tròn thuốc viên của Flatsome */
    width: 100% !important;
    min-height: 48px !important;
    padding: 12px !important;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

button.sbm-btn.add-to-cart:hover, 
button.sbm-card-add-to-cart-btn:hover, 
button.sbm-mini-add-btn:hover,
.sbm-product-actions button.add-to-cart:hover,
.sbm-result-card button.sbm-card-add-to-cart-btn:hover {
    background: #dc2626 !important; 
    background-color: #dc2626 !important; 
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.5) !important;
    transform: translateY(-2px) !important;
}

button.sbm-btn.add-to-cart:active, 
button.sbm-card-add-to-cart-btn:active, 
button.sbm-mini-add-btn:active {
    transform: translateY(1px) !important;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4) !important;
}

button.sbm-btn.add-to-cart svg, 
button.sbm-card-add-to-cart-btn svg, 
button.sbm-mini-add-btn svg {
    stroke: #ffffff !important;
    transition: transform 0.3s ease !important;
}

button.sbm-btn.add-to-cart:hover svg, 
button.sbm-card-add-to-cart-btn:hover svg, 
button.sbm-mini-add-btn:hover svg {
    transform: translateX(3px) !important;
}

.request-book { background-color: #3b82f6; color: #fff; }

.author-links a, .sbm-popup-author-btn {
    background-color: #f3f4f6; border: 1px solid #e5e7eb; color: #4b5563;
    padding: 0.3rem 0.8rem; border-radius: 99px; font-size: 0.85rem;
    font-weight: 500; cursor: pointer; transition: all 0.2s ease;
    text-decoration: none; display: inline-block; margin: 0.25rem;
}
.author-links a:hover, .sbm-popup-author-btn:hover {
    background-color: var(--sbm-primary-color); border-color: var(--sbm-primary-color); color: #fff;
}

.sbm-padmin-action-btn {
    background: #f3f4f6; border: 1px solid #e5e7eb; width: 36px; height: 36px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    cursor: pointer; transition: all 0.2s ease; color: #6b7280;
}
.sbm-padmin-action-btn:hover { transform: scale(1.1); background: #e5e7eb; color: var(--sbm-primary-color); }
.sbm-padmin-action-btn svg { width: 20px; height: 20px; }

/* --- 3. Common Containers & Wrappers --- */
.sbm-frame {
    width: 100%; max-width: 1200px; padding: 1.5rem; margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.7); border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-radius: 16px;
}
@media (min-width: 768px) { .sbm-frame { padding: 2.5rem; } }
.sbmalpha-container.sbmalpha-bg-image .sbm-frame { background: rgba(0, 0, 0, 0.4); border-color: rgba(255, 255, 255, 0.2); }

.sbm-stock-info-container {
    background-color: #fffbe6; border: 1px solid #fde68a; color: #92400e;
    border-radius: 8px; padding: 0.75rem; margin: 1rem 0; font-size: 0.9rem; position: relative;
}
.sbm-stock-display-item { padding: 0.25rem 0; }
.sbm-stock-edit-toggle {
    position: absolute !important; top: 50% !important; right: 8px !important;
    transform: translateY(-50%) !important; width: 28px !important; height: 28px !important;
    border-radius: 50% !important; display: flex !important; align-items: center !important; justify-content: center !important;
    background: #fef3c7 !important; border: 1px solid #fde68a !important; color: #92400e !important;
    padding: 0 !important; font-size: 22px !important; line-height: 1 !important; cursor: pointer !important; box-sizing: border-box !important;
}
.sbm-stock-edit-form { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed #fde68a; }
.sbm-stock-form-row { display: flex; align-items: center; gap: 0.5rem; }
.sbm-stock-form-row label { font-weight: 500; }
.sbm-stock-form-row input { width: 100%; border: 1px solid #fde68a; border-radius: 4px; padding: 5px; }

.sbm-stock-save-btn { grid-column: 1 / -1; background-color: #f59e0b; color: white; border: none; padding: 0.5rem; border-radius: 6px; cursor: pointer; }
.sbm-stock-save-status { grid-column: 1 / -1; text-align: center; font-weight: 500; min-height: 1.2em; }
.sbm-stock-unpublish-btn { grid-column: 1 / -1; background-color: #ef4444; color: white; border: none; padding: 0.5rem; border-radius: 6px; cursor: pointer; margin-top: 0.5rem; opacity: 0.9; transition: opacity 0.2s; }
.sbm-stock-unpublish-btn:hover { opacity: 1; }

/* --- 4. Utilities & Animations --- */
.form-message { margin-top: 1rem; font-weight: 500; }

.sbm-cart-button-wrapper.shake { animation: sbm-cart-shake 0.8s cubic-bezier(.36,.07,.19,.97) both; }
@keyframes sbm-cart-shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

/* --- 5. 3D FLIP EFFECT FOR PRODUCT CARDS (SQUARE & CONTAINED) --- */

/* 1. Ép khung ảnh thành hình vuông 1:1 và nền trắng */
.sbm-card-img-wrapper {
    perspective: 1200px; 
    position: relative; 
    aspect-ratio: 1/1 !important; /* [THAY ĐỔI] Tỉ lệ 1:1 chuẩn vuông */
    width: 100%;
    border-radius: 8px 8px 0 0; /* Bo góc trên, góc dưới phẳng để nối mượt với phần chữ */
    background: #ffffff !important; /* [THAY ĐỔI] Nền trắng chống chớp ảnh */
    border-bottom: 1px solid #eee; 
    z-index: 1;
}
.is-bento-mode .sbm-card-img-wrapper { border-radius: 20px !important; }
.is-bento-mode .sbm-card-img-wrapper.has-3d-flip { overflow: visible !important; }

.sbm-3d-flip-inner {
    position: relative; width: 100%; height: 100%;
    transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform-style: preserve-3d; -webkit-transform-style: preserve-3d; border-radius: inherit;
}

@media (hover: hover) and (pointer: fine) {
    .sbm-result-card:hover .sbm-card-img-wrapper.has-3d-flip .sbm-3d-flip-inner {
        transform: rotateY(180deg); -webkit-transform: rotateY(180deg);
    }
}

/* 2. Ép mặt trước và mặt sau có nền trắng tinh */
.sbm-flip-front, .sbm-flip-back {
    position: absolute; inset: 0; width: 100%; height: 100%;
    backface-visibility: hidden; -webkit-backface-visibility: hidden; 
    border-radius: inherit; overflow: hidden; 
    background-color: #ffffff !important; /* [THAY ĐỔI] Nền trắng tinh */
    display: flex; align-items: center; justify-content: center; /* Căn giữa ảnh tuyệt đối */
}
.sbm-flip-back { transform: rotateY(180deg); -webkit-transform: rotateY(180deg); }

/* 3. Phép thuật: Chứa ảnh vừa vặn, không bị cắt xén (Contain) */
.sbm-flip-front img, .sbm-flip-back img {
    width: 100%; 
    height: 100%; 
    object-fit: contain !important; /* [THAY ĐỔI] Dùng contain để chèn trắng 2 bên nếu ảnh là chữ nhật */
    display: block; 
    margin: 0 !important; 
    padding: 0.5rem !important; /* [THÊM] Thêm 1 chút lề để bìa sách không sát rịt vào viền */
    border: none !important;
}

.is-list-view .sbm-card-img-wrapper.has-3d-flip .sbm-3d-flip-inner { transform: none !important; -webkit-transform: none !important; }
.is-list-view .sbm-flip-back { display: none !important; }

/* =================================================================
 * SBM DISCOVERY ENGINE UI
 * ================================================================= */

/* VỊ TRÍ 1: Dải Tags dưới ô tìm kiếm */
.sbm-discovery-tags-wrapper {
    display: flex; gap: 8px; margin-top: 15px; padding-bottom: 5px;
    overflow-x: auto; scrollbar-width: none; align-items: center;
    max-width: 800px; margin-left: auto; margin-right: auto;
}
.sbm-discovery-tags-wrapper::-webkit-scrollbar { display: none; }
.sbm-discovery-tag {
    background: rgba(255,255,255,0.8); border: 1px solid rgba(0,0,0,0.05);
    padding: 6px 14px; border-radius: 20px; font-size: 0.8rem; color: #4b5563;
    cursor: pointer; white-space: nowrap; transition: 0.2s; font-weight: 600;
    display: flex; align-items: center; gap: 5px; box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}
.sbm-discovery-tag:hover { background: #10b981; color: #fff; transform: translateY(-2px); border-color: #10b981; }
.sbmalpha-container.sbmalpha-bg-image .sbm-discovery-tag { background: rgba(0,0,0,0.4); color: #fff; border-color: rgba(255,255,255,0.2); }
.sbmalpha-container.sbmalpha-bg-image .sbm-discovery-tag:hover { background: #10b981; border-color: #10b981; }

/* Màu mặc định khi nền trắng */
.sbm-discovery-label {
    font-size: 0.85rem; font-weight: 700; color: #4b5563; 
    margin-right: 5px; white-space: nowrap; transition: color 0.3s;
}
/* Tự động đổi sang trắng có đổ bóng khi có hình nền phía sau */
.sbmalpha-container.sbmalpha-bg-image .sbm-discovery-label {
    color: #fff; text-shadow: 1px 1px 4px rgba(0,0,0,0.8);
}

/* --- VỊ TRÍ 2: Hàng nút Cảm hứng (Nằm ngang & Glassmorphism) --- */
.sbm-inspiration-row {
    display: grid !important;
    grid-template-columns: repeat(4, 1fr); /* Xếp ngang 4 cột đều nhau */
    gap: 12px;
    margin-top: 12px;
    width: 100%;
}

.sbm-inspire-btn {
    /* Hiệu ứng Glassmorphism y hệt các nút Bento bên trên */
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 16px;
    padding: 15px 10px;
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
    cursor: pointer; 
    transition: all 0.3s ease; 
    gap: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.sbm-inspire-btn:hover { 
    background: rgba(255, 255, 255, 0.25); 
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-3px); 
}

.sbm-inspire-icon { 
    font-size: 1.6rem; 
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2)); 
}

.sbm-inspire-text { 
    font-size: 0.85rem; 
    font-weight: 600; 
    color: #ffffff; /* Chữ màu trắng để nổi bật trên nền kính */
    text-align: center; 
    line-height: 1.3; 
    transition: opacity 0.4s; 
    text-shadow: 0 1px 3px rgba(0,0,0,0.6); /* Đổ bóng nhẹ cho dễ đọc */
}
.sbm-inspire-text.fade-out { 
    opacity: 0; 
}

/* Responsive cho Mobile: Tự động cuộn thành 2 hàng, mỗi hàng 2 nút */
@media (max-width: 768px) {
    .sbm-inspiration-row { 
        grid-template-columns: repeat(2, 1fr); 
    }
}