/* --- Thiết kế Trang chi tiết tài liệu (Document Detail Page) --- */

.detail-container {
    padding: 0 16px;
}

.detail-background {
    padding: 32px 0;
    background: linear-gradient(to bottom, rgba(230, 243, 254, 0) 10%, #E6F3FE 30%);
}

[data-theme="dark"] .detail-background {
    background: none;
}

/* Lưới layout 2 cột chính */
.detail-layout-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

@media (min-width: 992px) {
    .detail-layout-grid {
        grid-template-columns: 2.1fr 1fr; /* Tỉ lệ chia cột chuẩn */
    }
}

/* --- Cột Trái: Nội dung tài liệu --- */
.detail-main-content {
    display: flex;
    flex-direction: column;
}

.detail-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.3;
    margin: 0 0 12px 0;
}

/* Nhãn định dạng tệp tin */
.detail-format-pills {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.format-pill {
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    border: 1.5px solid var(--border-subtle);
}

.format-pdf { color: var(--accent-red); border-color: var(--accent-red); }
.format-word { color: var(--accent-blue); border-color: var(--accent-blue); }
.format-ppt { color: var(--accent-orange); border-color: var(--accent-orange); }

/* Mô tả ngắn */
.detail-short-desc {
    font-size: var(--font-size-base);
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 24px;
}

/* Khung hiển thị trước trang tài liệu */
.document-preview-window {
    border: 3px solid var(--primary); /* Đường viền xanh dày */
    border-radius: 20px;
    overflow: hidden;
    background-color: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    margin-bottom: 32px;
}

.preview-doc-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Tab và Mô tả chi tiết */
.detail-tabs-section {
    display: flex;
    flex-direction: column;
}

.tab-headers {
    display: flex;
}

.tab-button {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: #ffffff;
    background-color: var(--primary);
    border: none;
    padding: 12px 28px;
    border-radius: 12px 12px 0 0; /* Bo góc trên của Tab hoạt động */
    cursor: default;
}

.tab-panel {
    border: 1.5px solid var(--border-subtle);
    border-radius: 0 16px 16px 16px; /* Bo tròn các góc dưới */
    padding: 24px;
    background-color: var(--bg-card);
}

.panel-heading {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--text-main);
    margin: 0 0 12px 0;
}

.panel-body {
    font-size: var(--font-size-base);
    color: var(--text-main);
    line-height: 1.6;
}

.panel-body ul {
    margin: 12px 0 0 0;
    padding-left: 20px;
}

.panel-body li {
    margin-bottom: 8px;
}


/* --- Cột Phải: Sidebar thông tin thanh toán --- */
.detail-sidebar {
    position: relative;
}

.pricing-card {
    background-color: var(--bg-card);
    border: 1.5px solid var(--border-subtle);
    border-radius: 24px;
    padding: 28px 24px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.02);
    position: sticky;
    top: 24px;
}

/* Icon trang trí bút chì */
.pencil-decor {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 30px;
    height: 30px;
    color: var(--accent-yellow);
}

.pencil-decor svg {
    width: 32px;
    height: 32px;
    transform: rotate(-15deg);
}

.price-header {
    margin-bottom: 20px;
}

.price-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--text-main);
    display: block;
    margin-bottom: 6px;
}

.price-amount {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--primary);
}

.price-limit {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-muted);
}

/* Bảng danh sách thông số */
.metadata-table-box {
    border: 1.5px solid var(--border-subtle);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 24px;
}

.meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1.5px solid var(--border-subtle);
    font-size: var(--font-size-sm);
}

.meta-row:last-child {
    border-bottom: none;
}

.meta-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-weight: 500;
}

.meta-label svg {
    width: 16px;
    height: 16px;
    color: var(--text-main);
}

.meta-value {
    color: var(--text-main);
    font-weight: 600;
}

.author-name {
    color: var(--text-muted);
}

/* Nút sidebar */
.pricing-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-sidebar {
    font-family: var(--font-family);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    border-radius: 12px;
    font-size: var(--font-size-base);
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: background-color 0.2s, opacity 0.2s;
}

.btn-sidebar svg {
    width: 20px;
    height: 20px;
}

.btn-add-cart {
    background-color: var(--primary);
    color: #ffffff;
}

.btn-add-cart:hover {
    background-color: var(--primary-hover);
}

.btn-buy-now {
    background-color: var(--accent-orange);
    color: #ffffff;
}

.btn-buy-now:hover {
    opacity: 0.7;
}

.btn-preview-doc {
    background-color: var(--accent-green);
    color: #ffffff;
}

.btn-preview-doc:hover {
    opacity: 0.7;
}



/* CSS cho Modal Xem Trước */
.doc-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: none; /* Ẩn mặc định */
    align-items: center;
    justify-content: center;
}

.doc-modal.active {
    display: flex;
}

.doc-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
}

.doc-modal-container {
    position: relative;
    background-color: #f8fafc;
    width: 90%;
    max-width: 960px;
    height: 85vh;
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Header */
.doc-modal-header {
    padding: 16px 24px;
    background-color: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.doc-modal-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.doc-modal-badge {
    background-color: #fee2e2;
    color: #ef4444;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    text-transform: uppercase;
}

.doc-modal-title {
    font-size: 1.1rem;
    color: #1e293b;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 550px;
}

.doc-modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: #94a3b8;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}

.doc-modal-close:hover {
    color: #475569;
}

/* Body */
.doc-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background-color: #f1f5f9;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Trang tài liệu dạng ảnh */
.doc-modal-pages {
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.preview-page-wrapper {
    position: relative;
    background-color: #ffffff;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.preview-page-img {
    width: 100%;
    display: block;
    height: auto;
    user-select: none; /* Tránh bôi đen copy */
    -webkit-user-drag: none; /* Tránh kéo thả ảnh */
}

/* Tag số trang ở góc mỗi tờ */
.page-number-tag {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background-color: rgba(15, 23, 42, 0.7);
    color: #ffffff;
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    pointer-events: none;
}

/* Loading */
.doc-modal-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: auto;
}

.spinner {
    border: 4px solid #e2e8f0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border-left-color: #2563eb;
    animation: spin 1s linear infinite;
    margin-bottom: 12px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer */
.doc-modal-footer {
    padding: 16px 24px;
    background-color: #ffffff;
    border-top: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.doc-modal-footer-text p {
    margin: 0;
    font-weight: 600;
    color: #334155;
    font-size: 0.95rem;
}

.doc-modal-footer-text span {
    font-size: 0.8rem;
    color: #64748b;
}

.btn-modal-action {
    background-color: #ff5722;
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.2s;
}

.btn-modal-action:hover {
    background-color: #e64a19;
}

.document-image-slider {
    width: 100%;
    margin: 24px 0;
}

.document-slider-main {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
}

.document-slider-stage {
    position: relative;
    flex: 1;
    overflow: hidden;
    min-height: 420px;
    border: 1px solid #e1e5eb;
    border-radius: 12px;
    background: #f5f7fa;
}

.document-slider-stage img {
    width: 100%;
    height: 620px;
    display: block;
    object-fit: contain;
    background: #f5f7fa;
    transition: opacity 0.2s ease;
}

#document-slider-counter {
    position: absolute;
    right: 14px;
    bottom: 14px;
    padding: 6px 11px;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    font-size: 13px;
}

.document-slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 5;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: rgba(20, 35, 70, 0.82);
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    transform: translateY(-50%);
    transition: background 0.2s ease;
}

.document-slider-arrow:hover {
    background: #142346;
}

.document-slider-arrow.slider-prev {
    left: 14px;
}

.document-slider-arrow.slider-next {
    right: 14px;
}

.document-slider-thumbnails {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    padding: 4px 2px 10px;
    overflow-x: auto;
    scroll-behavior: smooth;
}

.document-slider-thumbnail {
    flex: 0 0 94px;
    height: 74px;
    padding: 3px;
    overflow: hidden;
    border: 2px solid transparent;
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    opacity: 0.72;
    transition:
        opacity 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

.document-slider-thumbnail:hover {
    opacity: 1;
    transform: translateY(-2px);
}

.document-slider-thumbnail.active {
    border-color: #1e5eff;
    opacity: 1;
}

.document-slider-thumbnail img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 4px;
    object-fit: cover;
}

.document-preview-empty {
    margin: 24px 0;
    padding: 50px 20px;
    border: 1px dashed #ccd2da;
    border-radius: 10px;
    background: #f8f9fa;
    color: #777;
    text-align: center;
}

@media (max-width: 768px) {
    .document-slider-stage {
        min-height: 280px;
    }

    .document-slider-stage img {
        height: 380px;
    }

    .document-slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .document-slider-thumbnail {
        flex-basis: 76px;
        height: 60px;
    }
}

.document-image-slider {
    width: 100%;
    margin: 24px 0;
    user-select: none;
}

.document-slider-main {
    position: relative;
    display: flex;
    align-items: center;
}

.document-slider-stage {
    position: relative;
    width: 100%;
    height: 620px;
    overflow: hidden;
    border: 1px solid #e2e7ef;
    border-radius: 14px;
    background: #f4f6f9;
    box-shadow: 0 8px 25px rgba(20, 35, 70, 0.08);
}

#document-slider-main-image {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    background: #f4f6f9;

    opacity: 1;
    transform: translateX(0) scale(1);
    transition:
        transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.3s ease;
    will-change: transform, opacity;
}

/* Ảnh cũ trượt ra bên trái */
#document-slider-main-image.slide-out-left {
    opacity: 0;
    transform: translateX(-45px) scale(0.985);
}

/* Ảnh cũ trượt ra bên phải */
#document-slider-main-image.slide-out-right {
    opacity: 0;
    transform: translateX(45px) scale(0.985);
}

/* Ảnh mới chuẩn bị đi từ phải vào */
#document-slider-main-image.slide-from-right {
    opacity: 0;
    transform: translateX(45px) scale(0.985);
    transition: none;
}

/* Ảnh mới chuẩn bị đi từ trái vào */
#document-slider-main-image.slide-from-left {
    opacity: 0;
    transform: translateX(-45px) scale(0.985);
    transition: none;
}

/* Nút chuyển ảnh */
.document-slider-arrow {
    position: absolute;
    top: 50%;
    z-index: 10;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: rgba(20, 35, 70, 0.78);
    color: #fff;
    font-size: 24px;
    line-height: 44px;
    cursor: pointer;
    transform: translateY(-50%);
    opacity: 0.82;
    backdrop-filter: blur(5px);
    transition:
        background 0.2s ease,
        opacity 0.2s ease,
        transform 0.2s ease;
}

.document-slider-arrow:hover {
    opacity: 1;
    background: rgba(20, 35, 70, 0.95);
    transform: translateY(-50%) scale(1.08);
}

.document-slider-arrow:active {
    transform: translateY(-50%) scale(0.94);
}

.slider-prev {
    left: 16px;
}

.slider-next {
    right: 16px;
}

/* Bộ đếm ảnh */
#document-slider-counter {
    position: absolute;
    right: 16px;
    bottom: 16px;
    z-index: 5;
    min-width: 58px;
    padding: 6px 12px;
    border-radius: 18px;
    background: rgba(0, 0, 0, 0.68);
    color: #fff;
    font-size: 13px;
    text-align: center;
    backdrop-filter: blur(5px);
}

/* Danh sách ảnh con */
.document-slider-thumbnails {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    padding: 5px 2px 10px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: thin;
}

.document-slider-thumbnail {
    flex: 0 0 92px;
    height: 72px;
    padding: 3px;
    overflow: hidden;
    border: 2px solid transparent;
    border-radius: 9px;
    background: #fff;
    cursor: pointer;
    opacity: 0.62;
    transform: translateY(0);
    transition:
        opacity 0.25s ease,
        border-color 0.25s ease,
        transform 0.25s ease,
        box-shadow 0.25s ease;
}

.document-slider-thumbnail:hover {
    opacity: 1;
    transform: translateY(-3px);
}

.document-slider-thumbnail.active {
    opacity: 1;
    border-color: #2563eb;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.22);
}

.document-slider-thumbnail img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 5px;
    object-fit: cover;
}

/* Thanh cuộn thumbnail */
.document-slider-thumbnails::-webkit-scrollbar {
    height: 6px;
}

.document-slider-thumbnails::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background: #c5ccd8;
}

.document-slider-thumbnails::-webkit-scrollbar-track {
    background: transparent;
}

@media (max-width: 768px) {
    .document-slider-stage {
        height: 420px;
        border-radius: 10px;
    }

    .document-slider-arrow {
        width: 38px;
        height: 38px;
        font-size: 20px;
        line-height: 38px;
    }

    .slider-prev {
        left: 9px;
    }

    .slider-next {
        right: 9px;
    }

    .document-slider-thumbnail {
        flex-basis: 76px;
        height: 60px;
    }
}

@media (max-width: 480px) {
    .document-slider-stage {
        height: 320px;
    }
}

/* Tôn trọng thiết lập giảm chuyển động của người dùng */
@media (prefers-reduced-motion: reduce) {
    #document-slider-main-image,
    .document-slider-arrow,
    .document-slider-thumbnail {
        transition: none;
    }

    .document-slider-thumbnails {
        scroll-behavior: auto;
    }
}