/* ==========================================================================
   TRANG CHI TIẾT SẢN PHẨM - CƠ KHÍ ĐẠI THẮNG (PRODUCT DETAIL 2026)
   ========================================================================== */

:root {
    --dt-blue-primary: #0284C7;
    --dt-blue-hover: #0369A1;
    --dt-blue-light: #E0F2FE;
    --dt-blue-gradient: linear-gradient(135deg, #0284C7 0%, #0099E5 100%);
    --dt-orange: #FF6500;
    --dt-orange-hover: #E05500;
    --dt-dark: #0F172A;
    --dt-text: #334155;
    --dt-muted: #64748B;
    --dt-bg-light: #F8FAFC;
    --dt-border: #E2E8F0;
    --dt-card-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
    --dt-card-hover: 0 12px 28px rgba(2, 132, 199, 0.12);
}

.product-detail-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 36px 15px 70px;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ==========================================================================
   1. SHOWCASE CHÍNH (GALLERY & THÔNG TIN MÁY)
   ========================================================================== */
.product-showcase {
    display: grid;
    grid-template-columns: 520px 1fr;
    gap: 36px;
    margin-bottom: 48px;
    align-items: start;
}

/* ---- CỘT TRÁI: GALLERY ẢNH THỰC TẾ ---- */
.detail-gallery {
    position: relative;
}

.main-image-box {
    position: relative;
    border-radius: 14px;
    overflow: hidden;
    background: var(--dt-bg-light);
    border: 1px solid var(--dt-border);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    box-shadow: var(--dt-card-shadow);
    cursor: zoom-in;
}

.main-image-box img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.main-image-box:hover img {
    transform: scale(1.03);
}

.gallery-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--dt-blue-primary);
    color: #FFFFFF;
    font-size: 11.5px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 0.4px;
    z-index: 5;
    box-shadow: 0 2px 8px rgba(2, 132, 199, 0.35);
}

.gallery-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--dt-border);
    color: var(--dt-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    z-index: 5;
}

.gallery-nav-btn:hover {
    background: var(--dt-blue-primary);
    color: #FFFFFF;
    border-color: var(--dt-blue-primary);
}

.gallery-nav-btn.prev {
    left: 10px;
}

.gallery-nav-btn.next {
    right: 10px;
}

.thumbnail-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 14px;
}

.thumb-item {
    aspect-ratio: 4/3;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid var(--dt-border);
    background: var(--dt-bg-light);
    padding: 4px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.thumb-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.thumb-item:hover {
    border-color: #BAE6FD;
}

.thumb-item.active {
    border-color: var(--dt-blue-primary);
    box-shadow: 0 2px 10px rgba(2, 132, 199, 0.25);
    background: #FFFFFF;
}

/* ---- CỘT PHẢI: THÔNG TIN SẢN PHẨM & BÁO GIÁ ---- */
.detail-info {
    display: flex;
    flex-direction: column;
}

.product-meta-badges {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.meta-badge-sku {
    font-size: 12px;
    font-weight: 700;
    color: var(--dt-muted);
    background: #F1F5F9;
    padding: 3px 10px;
    border-radius: 6px;
    border: 1px solid var(--dt-border);
}

.meta-badge-category {
    font-size: 12px;
    font-weight: 700;
    color: var(--dt-blue-primary);
    background: var(--dt-blue-light);
    padding: 3px 10px;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s;
}

.meta-badge-category:hover {
    background: #BAE6FD;
    text-decoration: none;
}

.meta-badge-status {
    font-size: 12px;
    font-weight: 700;
    color: #16A34A;
    background: #DCFCE7;
    padding: 3px 10px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.meta-badge-status::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #16A34A;
}

.product-main-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--dt-dark);
    line-height: 1.35;
    margin: 0 0 16px 0;
    letter-spacing: -0.01em;
}

/* Khối Giá Niêm Yết / Báo Giá Xưởng */
.product-price-section {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 14px 18px;
    background: #F8FAFC;
    border: 1px solid var(--dt-border);
    border-radius: 12px;
    margin-bottom: 20px;
}

.price-label {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--dt-muted);
}

.price-amount {
    font-size: 24px;
    font-weight: 800;
    color: var(--dt-blue-primary);
}

.price-unit-note {
    font-size: 13px;
    color: var(--dt-muted);
}

/* Cam Kết Chất Lượng Cơ Khí (Thực tế, không vibe coding) */
.industrial-guarantees {
    background: #F0F9FF;
    border: 1px solid #BAE6FD;
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 22px;
}

.guarantee-title {
    font-size: 14.5px;
    font-weight: 700;
    color: #0369A1;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.guarantee-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 16px;
}

.guarantee-item {
    font-size: 13.5px;
    color: #0C4A6E;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.45;
}

.guarantee-item i {
    color: var(--dt-blue-primary);
    margin-top: 2px;
    font-size: 13px;
    flex-shrink: 0;
}

/* Mô tả ngắn */
.product-short-summary {
    font-size: 14px;
    line-height: 1.6;
    color: var(--dt-text);
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--dt-border);
}

/* Nhóm nút CTA */
.product-cta-group {
    display: flex;
    gap: 12px;
    margin-bottom: 22px;
    flex-wrap: wrap;
}

.btn-cta-quote {
    flex: 1;
    min-width: 200px;
    background: linear-gradient(135deg, #FF6500 0%, #FF8A00 100%);
    color: #FFFFFF !important;
    font-size: 14.5px;
    font-weight: 800;
    padding: 14px 22px;
    border-radius: 10px;
    text-align: center;
    text-decoration: none !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 14px rgba(255, 101, 0, 0.35);
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
}

.btn-cta-quote:hover {
    background: linear-gradient(135deg, #E05500 0%, #FF6500 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 101, 0, 0.45);
}

.btn-cta-call {
    flex: 1;
    min-width: 200px;
    background: var(--dt-blue-gradient);
    color: #FFFFFF !important;
    font-size: 14.5px;
    font-weight: 800;
    padding: 14px 22px;
    border-radius: 10px;
    text-align: center;
    text-decoration: none !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
    transition: all 0.25s ease;
    border: none;
}

.btn-cta-call:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.4);
}

.btn-cta-zalo {
    background: #FFFFFF;
    color: var(--dt-blue-primary) !important;
    border: 1px solid var(--dt-blue-primary);
    font-size: 14px;
    font-weight: 700;
    padding: 14px 20px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none !important;
    transition: all 0.2s ease;
}

.btn-cta-zalo:hover {
    background: var(--dt-blue-light);
}

/* Hotline Bar Đơn Giản, Chuyên Nghiệp */
.detail-hotline-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    background: #F8FAFC;
    border: 1px solid var(--dt-border);
    border-radius: 12px;
    padding: 12px 16px;
}

.hotline-mini-item {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none !important;
    color: inherit;
}

.hotline-mini-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--dt-blue-light);
    color: var(--dt-blue-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
}

.hotline-mini-info {
    display: flex;
    flex-direction: column;
}

.hotline-mini-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--dt-muted);
}

.hotline-mini-num {
    font-size: 13px;
    font-weight: 800;
    color: var(--dt-dark);
}

.hotline-mini-item:hover .hotline-mini-num {
    color: var(--dt-blue-primary);
}

/* ==========================================================================
   2. HỆ THỐNG TABS NỘI DUNG & KỸ THUẬT (FULL WIDTH)
   ========================================================================== */
.detail-content-tabs {
    background: #FFFFFF;
    border: 1px solid var(--dt-border);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 50px;
    box-shadow: var(--dt-card-shadow);
}

.tabs-nav-bar {
    display: flex;
    border-bottom: 1px solid var(--dt-border);
    background: #F8FAFC;
    overflow-x: auto;
}

.tab-nav-btn {
    padding: 16px 24px;
    font-size: 14.5px;
    font-weight: 700;
    color: var(--dt-muted);
    border: none;
    background: transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tab-nav-btn:hover {
    color: var(--dt-blue-primary);
    background: rgba(2, 132, 199, 0.04);
}

.tab-nav-btn.active {
    color: var(--dt-blue-primary);
    background: #FFFFFF;
    border-bottom-color: var(--dt-blue-primary);
}

.tab-body-pane {
    display: none;
    padding: 32px;
}

.tab-body-pane.active {
    display: block;
    animation: fadeInPane 0.25s ease-out;
}

@keyframes fadeInPane {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Format Content Rich Text */
.ck-detail-article {
    font-size: 15px;
    line-height: 1.75;
    color: #334155;
}

.ck-detail-article h2,
.ck-detail-article h3,
.ck-detail-article h4 {
    color: var(--dt-dark);
    font-weight: 700;
    margin: 24px 0 12px;
}

.ck-detail-article p {
    margin-bottom: 14px;
}

.ck-detail-article img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: 10px;
    margin: 16px auto;
    display: block;
    box-shadow: var(--dt-card-shadow);
}

/* Video Responsive Container */
.detail-video-wrapper {
    margin-top: 30px;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--dt-card-shadow);
    border: 1px solid var(--dt-border);
}

.detail-video-wrapper .video-title {
    background: #F8FAFC;
    padding: 12px 18px;
    font-size: 15px;
    font-weight: 700;
    color: var(--dt-dark);
    border-bottom: 1px solid var(--dt-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.detail-video-embed {
    position: relative;
    padding-top: 56.25%; /* 16:9 */
    background: #000;
}

.detail-video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Bảng Thông Số Kỹ Thuật (Chuẩn Kỹ Thuật) */
.specs-wrapper {
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--dt-text);
}

.specs-wrapper table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--dt-border);
}

.specs-wrapper th,
.specs-wrapper td {
    padding: 12px 18px;
    border: 1px solid var(--dt-border);
    text-align: left;
}

.specs-wrapper th {
    background: #F1F5F9;
    font-weight: 700;
    color: var(--dt-dark);
}

.specs-wrapper tr:nth-child(even) td {
    background: #F8FAFC;
}

/* Quy Trình Bàn Giao 4 Bước Chuẩn */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 10px;
}

.process-step-card {
    background: #F8FAFC;
    border: 1px solid var(--dt-border);
    border-radius: 12px;
    padding: 20px 16px;
    text-align: center;
    position: relative;
    transition: all 0.25s ease;
}

.process-step-card:hover {
    background: #FFFFFF;
    border-color: #BAE6FD;
    box-shadow: var(--dt-card-hover);
    transform: translateY(-3px);
}

.process-step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--dt-blue-gradient);
    color: #FFFFFF;
    font-size: 15px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
}

.process-step-title {
    font-size: 14.5px;
    font-weight: 700;
    color: var(--dt-dark);
    margin-bottom: 6px;
}

.process-step-desc {
    font-size: 12.5px;
    color: var(--dt-muted);
    line-height: 1.5;
    margin: 0;
}

/* Form Bình Luận & Danh Sách Bình Luận */
.comments-section {
    max-width: 800px;
}

.comment-form-box {
    background: #F8FAFC;
    border: 1px solid var(--dt-border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 30px;
}

.comment-form-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--dt-dark);
    margin-bottom: 16px;
}

.comment-input-group {
    margin-bottom: 16px;
}

.comment-input-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--dt-text);
    margin-bottom: 6px;
}

.comment-input-group input,
.comment-input-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--dt-border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--dt-dark);
    background: #FFFFFF;
    outline: none;
    transition: border-color 0.2s;
}

.comment-input-group input:focus,
.comment-input-group textarea:focus {
    border-color: var(--dt-blue-primary);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.12);
}

.btn-comment-submit {
    background: var(--dt-blue-gradient);
    color: #FFFFFF;
    font-weight: 700;
    border: none;
    border-radius: 8px;
    padding: 10px 24px;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
    transition: all 0.2s;
}

.btn-comment-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(2, 132, 199, 0.35);
}

.comment-item-card {
    padding: 16px 0;
    border-bottom: 1px solid var(--dt-border);
}

.comment-item-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.comment-author {
    font-size: 14.5px;
    font-weight: 700;
    color: var(--dt-dark);
}

.comment-date {
    font-size: 12px;
    color: var(--dt-muted);
}

.comment-body {
    font-size: 14px;
    color: var(--dt-text);
    line-height: 1.55;
}

/* ==========================================================================
   3. SẢN PHẨM LIÊN QUAN / ĐÃ XEM
   ========================================================================== */
.related-section-header {
    margin-bottom: 24px;
    border-left: 4px solid var(--dt-blue-primary);
    padding-left: 14px;
}

.related-section-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--dt-dark);
    margin: 0 0 4px 0;
    text-transform: uppercase;
    letter-spacing: -0.01em;
}

.related-section-subtitle {
    font-size: 13.5px;
    color: var(--dt-muted);
    margin: 0;
}

.related-products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    margin-bottom: 40px;
}

.related-card {
    background: #FFFFFF;
    border: 1px solid var(--dt-border);
    border-radius: 14px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: var(--dt-card-shadow);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.related-card:hover {
    transform: translateY(-5px);
    border-color: #BAE6FD;
    box-shadow: var(--dt-card-hover);
}

.related-img-wrap {
    height: 190px;
    background: var(--dt-bg-light);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 12px;
    border-bottom: 1px solid #F1F5F9;
}

.related-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
}

.related-card:hover .related-img-wrap img {
    transform: scale(1.05);
}

.related-info-wrap {
    padding: 14px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.related-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--dt-dark);
    line-height: 1.45;
    text-decoration: none !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 40px;
    margin-bottom: 10px;
    transition: color 0.2s;
}

.related-title:hover {
    color: var(--dt-blue-primary);
}

.related-price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px dashed var(--dt-border);
}

.related-price {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--dt-blue-primary);
}

.related-btn-quote {
    background: linear-gradient(135deg, #FF6500 0%, #FF8A00 100%);
    color: #FFFFFF !important;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    text-decoration: none !important;
}

/* ==========================================================================
   4. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
    .product-showcase {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .detail-gallery {
        max-width: 600px;
        margin: 0 auto;
        width: 100%;
    }
    .related-products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .product-detail-container {
        padding: 20px 12px 50px;
    }
    .product-main-title {
        font-size: 20px;
    }
    .guarantee-list {
        grid-template-columns: 1fr;
    }
    .product-cta-group {
        flex-direction: column;
    }
    .btn-cta-quote,
    .btn-cta-call,
    .btn-cta-zalo {
        width: 100%;
    }
    .detail-hotline-strip {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    .related-products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .process-grid {
        grid-template-columns: 1fr;
    }
    .tab-body-pane {
        padding: 20px 14px;
    }
}

@media (max-width: 480px) {
    .related-products-grid {
        grid-template-columns: 1fr;
    }
}