/**
 * Thuận Tools & Solutions (thuan-tools-solutions)
 * Giao diện hiện đại đồng bộ 100% phong cách phân hệ Cộng Đồng (thuan-lms-congdong)
 * Chuẩn Skool / Facebook Group Pro: tối giản, thanh lịch, mật độ thông tin cao (High-Density)
 * Chuẩn Responsive từ Mobile (390px) đến Desktop.
 */

:root {
    --tts-bg: #f6f7f9;                /* Nền toàn trang, phong cách Group Skool */
    --tts-card-bg: #ffffff;           /* Nền Card, Modal, Header */
    --tts-border: #eaedf1;            /* Viền thẻ siêu mỏng nhẹ */
    --tts-border-hover: #cbd5e1;
    --tts-text: #0f172a;              /* Màu chữ chính (Slate 900) */
    --tts-text-muted: #64748b;        /* Màu chữ phụ, mô tả (Slate 500) */
    --tts-primary: #1877f2;           /* Xanh Facebook/Skool chủ đạo */
    --tts-primary-hover: #166fe5;
    --tts-accent: #2563eb;            /* Xanh điểm nhấn */
    --tts-accent-hover: #1d4ed8;
    --tts-success: #16a34a;           /* Xanh lá trạng thái Đã mở khóa */
    --tts-success-bg: #f0fdf4;
    --tts-success-border: #bbf7d0;
    --tts-success-text: #15803d;
    --tts-warning: #f59e0b;           /* Vàng cam trạng thái Học viên VIP */
    --tts-warning-bg: #fffbeb;
    --tts-warning-border: #fde68a;
    --tts-warning-text: #92400e;
    --tts-danger: #dc2626;
    --tts-danger-bg: #fef2f2;
    --tts-danger-border: #fecaca;
    --tts-bubble-bg: #f1f5f9;
    --tts-radius: 12px;               /* Bo góc thẻ card chuẩn */
    --tts-radius-sm: 8px;
    --tts-radius-pill: 9999px;        /* Bo góc pill tab/badge */
    --tts-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    --tts-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   HỆ THỐNG ICON NÉT VẼ HIỆN ĐẠI (LINE-ART STROKE SVG ICON SYSTEM)
   Tối giản, thanh mảnh (stroke 1.8), sắc nét, 100% SVG line-art vector
   ========================================================================== */
.tts-svg-icon {
    display: inline-block;
    vertical-align: -0.15em;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    shape-rendering: geometricPrecision;
    transition: transform 0.15s ease, stroke 0.15s ease, color 0.15s ease;
}

/* Base Wrapper & Container */
.tts-wrapper,
.tts-wrapper *,
.tts-wrapper *::before,
.tts-wrapper *::after {
    box-sizing: border-box;
}

.tts-wrapper {
    background-color: var(--tts-bg);
    min-height: calc(100vh - 120px);
    padding: 16px 0 40px;
    color: var(--tts-text);
    font-family: inherit;
}

.tts-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ==========================================================================
   ALL-IN-ONE TOOLBAR HEADER (TIÊU ĐỀ + BỘ LỌC + TÌM KIẾM CÙNG NẰM TRÊN 1 KHUNG)
   ========================================================================== */
.tts-toolbar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 8px 14px;
    margin-bottom: 12px;
    box-shadow: var(--tts-shadow);
}

.tts-toolbar-header__title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.tts-toolbar-header__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(24, 119, 242, 0.08);
    color: var(--tts-primary);
    flex-shrink: 0;
}

.tts-toolbar-header__title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.25;
    color: var(--tts-text);
    margin: 0;
    white-space: nowrap;
}

.tts-toolbar-header__actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1 1 auto;
    justify-content: flex-end;
    min-width: 0;
}

.tts-toolbar-header .tts-pills {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding: 2px 0;
    flex: 0 1 auto;
    min-width: 0;
}

.tts-toolbar-header .tts-pill {
    padding: 5px 12px;
    font-size: 13px;
}

.tts-toolbar-header .tts-search-box {
    min-width: 180px;
    max-width: 230px;
    flex-shrink: 0;
}

.tts-toolbar-header .tts-search-input {
    padding: 6px 12px 6px 32px;
    font-size: 12.5px;
}

.tts-toolbar-header .tts-search-box .tts-svg-icon {
    left: 10px;
}

/* Fallback cho legacy header & toolbar */
.tts-header {
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 12px 20px;
    margin-bottom: 12px;
    box-shadow: var(--tts-shadow);
    display: flex;
    align-items: center;
}

.tts-header__title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--tts-text);
    margin: 0;
}

.tts-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 8px 12px;
    margin-bottom: 12px;
    box-shadow: var(--tts-shadow);
    flex-wrap: wrap;
}

.tts-pills {
    display: flex;
    align-items: center;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding: 2px 0;
    flex: 1 1 auto;
}

.tts-pills::-webkit-scrollbar {
    display: none;
}

.tts-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--tts-radius-pill);
    font-size: 13px;
    font-weight: 500;
    color: var(--tts-text-muted);
    background: transparent;
    border: 1px solid transparent;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.15s ease;
    cursor: pointer;
}

.tts-pill:hover {
    color: var(--tts-text);
    background: var(--tts-bubble-bg);
}

.tts-pill.is-active {
    color: #ffffff;
    background: var(--tts-primary);
    border-color: var(--tts-primary);
    font-weight: 600;
}

.tts-pill__count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.08);
    color: inherit;
    font-size: 11px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: var(--tts-radius-pill);
    line-height: 1.2;
}

.tts-pill.is-active .tts-pill__count {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.tts-search-box {
    position: relative;
    display: flex;
    align-items: center;
    min-width: 240px;
    flex: 0 0 auto;
}

.tts-search-box .tts-svg-icon {
    position: absolute;
    left: 12px;
    color: var(--tts-text-muted);
    pointer-events: none;
}

.tts-search-input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    font-size: 13px;
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius-pill);
    background: var(--tts-bubble-bg);
    color: var(--tts-text);
    outline: none;
    transition: all 0.15s ease;
}

.tts-search-input:focus {
    border-color: var(--tts-primary);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.12);
}

/* ==========================================================================
   TOOL GRID & CARD (MẬT ĐỘ THÔNG TIN CAO - HIGH-DENSITY)
   ========================================================================== */
.tts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.tts-card-item {
    position: relative;
    display: flex;
    flex-direction: column;
}

.tts-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    overflow: hidden;
    box-shadow: var(--tts-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    text-decoration: none;
    color: inherit;
    position: relative;
}

.tts-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--tts-shadow-hover);
    border-color: var(--tts-border-hover);
}

.tts-card__thumb-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #0f172a;
    overflow: hidden;
}

.tts-card__thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.tts-card:hover .tts-card__thumb {
    transform: scale(1.03);
}

.tts-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #94a3b8;
}

.tts-card__placeholder-text {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
}

.tts-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--tts-radius-pill);
    font-size: 11px;
    font-weight: 600;
    line-height: 1.2;
    z-index: 2;
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.tts-badge--free {
    background: var(--tts-success-bg);
    color: var(--tts-success-text);
    border: 1px solid var(--tts-success-border);
}

.tts-badge--student {
    background: var(--tts-warning-bg);
    color: var(--tts-warning-text);
    border: 1px solid var(--tts-warning-border);
}

.tts-badge--paid {
    background: #eff6ff;
    color: #1d4ed8;
    border: 1px solid #bfdbfe;
}

.tts-badge--featured {
    position: absolute;
    top: 10px;
    right: 10px;
    left: auto;
    background: rgba(15, 23, 42, 0.88);
    color: #fbbf24;
    border: 1px solid rgba(251, 191, 36, 0.4);
}

.tts-card__body {
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.tts-card__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--tts-text-muted);
    margin-bottom: 6px;
}

.tts-card__category {
    font-weight: 600;
    color: var(--tts-accent);
}

.tts-card__version {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    background: var(--tts-bubble-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.tts-card__title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--tts-text);
    margin: 0 0 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.15s ease;
}

.tts-card:hover .tts-card__title {
    color: var(--tts-primary);
}

.tts-card__desc {
    font-size: 13px;
    line-height: 1.45;
    color: var(--tts-text-muted);
    margin: 0 0 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.tts-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--tts-border);
    margin-top: auto;
}

.tts-card__price-wrap {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.tts-card__price {
    font-size: 15px;
    font-weight: 700;
    color: var(--tts-primary);
}

.tts-card__btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 600;
    color: var(--tts-accent);
    transition: transform 0.15s ease;
}

.tts-card:hover .tts-card__btn {
    transform: translateX(3px);
}

/* ==========================================================================
   PHÂN TRANG & EMPTY STATE
   ========================================================================== */
.tts-pagination-wrap {
    margin-top: 36px;
    display: flex;
    justify-content: center;
}

.tts-pagination-wrap .nav-links {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius-pill);
    padding: 6px 10px;
    box-shadow: var(--tts-shadow);
}

.tts-pagination-wrap .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-width: 34px;
    height: 34px;
    padding: 0 10px;
    border-radius: var(--tts-radius-pill);
    font-size: 13px;
    font-weight: 500;
    color: var(--tts-text);
    text-decoration: none;
    transition: all 0.15s ease;
}

.tts-pagination-wrap .page-numbers:hover {
    background: var(--tts-bubble-bg);
    color: var(--tts-primary);
}

.tts-pagination-wrap .page-numbers.current {
    background: var(--tts-primary);
    color: #ffffff;
    font-weight: 600;
}

.tts-pagination-wrap .page-numbers.dots {
    color: var(--tts-text-muted);
}

.tts-empty-state {
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 48px 24px;
    text-align: center;
    box-shadow: var(--tts-shadow);
}

.tts-empty-state__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--tts-bubble-bg);
    color: var(--tts-text-muted);
    margin-bottom: 14px;
}

.tts-empty-state__title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--tts-text);
}

.tts-empty-state__desc {
    font-size: 14px;
    color: var(--tts-text-muted);
    margin: 0 0 18px;
    max-width: 460px;
    margin-left: auto;
    margin-right: auto;
}

.tts-empty-state__btn {
    display: inline-flex;
    width: auto;
    padding: 9px 20px;
}

/* ==========================================================================
   SINGLE TOOL PAGE (CHUYÊN NGHIỆP, CINEMA RATIO, STICKY ACTION BOX)
   ========================================================================== */
.tts-single-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 350px;
    gap: 24px;
    align-items: start;
}

/* Cột nội dung chính (68%) */
.tts-main-content {
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 24px 28px;
    box-shadow: var(--tts-shadow);
}

/* Khung Video Demo Cinema 16:9 */
.tts-video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--tts-radius);
    overflow: hidden;
    background: #000000;
    margin-bottom: 24px;
    border: 1px solid var(--tts-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.tts-video-wrapper iframe,
.tts-video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.tts-single-header {
    margin-bottom: 20px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--tts-border);
}

.tts-single-header__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.tts-single-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--tts-text);
    margin: 0 0 10px;
}

.tts-article-body {
    font-size: 15px;
    line-height: 1.68;
    color: var(--tts-text);
}

.tts-article-body h2 {
    font-size: 20px;
    font-weight: 700;
    margin: 28px 0 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--tts-border);
    color: var(--tts-text);
}

.tts-article-body h3 {
    font-size: 17px;
    font-weight: 600;
    margin: 22px 0 10px;
    color: var(--tts-text);
}

.tts-article-body p {
    margin: 0 0 14px;
}

.tts-article-body ul,
.tts-article-body ol {
    margin: 0 0 16px 20px;
    padding: 0;
}

.tts-article-body li {
    margin-bottom: 6px;
}

.tts-single-cross-sell-wrap {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--tts-border);
}

/* Cột Sticky Sidebar (32%) */
.tts-sidebar-sticky {
    position: sticky;
    top: 84px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* ==========================================================================
   HỘP HÀNH ĐỘNG MỞ KHÓA TÀI NGUYÊN (GATED ACCESS ENGINE)
   ========================================================================== */
.tts-action-box {
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 22px;
    box-shadow: var(--tts-shadow);
    transition: all 0.2s ease;
}

.tts-action-box--unlocked {
    background: #fcfdfc;
    border-color: var(--tts-success-border);
}

.tts-action-box--locked {
    background: var(--tts-card-bg);
}

.tts-action-box__status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--tts-border);
}

.tts-action-box__status-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tts-action-box__status.is-unlocked .tts-action-box__status-left {
    color: var(--tts-success-text);
}

.tts-action-box__status.is-locked .tts-action-box__status-left {
    color: var(--tts-text);
}

.tts-action-box__verified-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    color: var(--tts-success-text);
    background: var(--tts-success-bg);
    border: 1px solid var(--tts-success-border);
    padding: 2px 7px;
    border-radius: var(--tts-radius-pill);
}

/* Nút hành động chính */
.tts-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    border-radius: var(--tts-radius-sm);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.15s ease;
    line-height: 1.3;
}

.tts-btn--lg {
    padding: 12px 18px;
    font-size: 14px;
}

.tts-btn--sm {
    padding: 6px 12px;
    font-size: 12px;
}

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

.tts-btn--primary:hover {
    background: var(--tts-primary-hover);
    color: #ffffff;
}

.tts-btn--success {
    background: var(--tts-success);
    color: #ffffff;
}

.tts-btn--success:hover {
    background: #15803d;
    color: #ffffff;
}

.tts-btn--outline {
    background: transparent;
    border: 1px solid var(--tts-border);
    color: var(--tts-text);
}

.tts-btn--outline:hover {
    background: var(--tts-bubble-bg);
    border-color: var(--tts-border-hover);
}

.tts-file-meta-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 12px;
    color: var(--tts-text-muted);
    margin-top: 8px;
    text-align: center;
}

.tts-file-meta-note__name {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    color: var(--tts-text);
    font-weight: 500;
}

.tts-file-meta-note__size {
    color: #15803d;
    font-size: 11px;
}

/* Khung giá tiền và form mua hàng */
.tts-action-box__price-block {
    text-align: center;
    margin-bottom: 14px;
    padding: 12px;
    background: var(--tts-bubble-bg);
    border-radius: var(--tts-radius-sm);
}

.tts-action-box__price-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--tts-text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.tts-action-box__price-val {
    font-size: 22px;
    font-weight: 700;
    color: var(--tts-primary);
}

.tts-action-box__buy-form {
    margin: 0;
}

.tts-action-box__subtext {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    font-size: 11px;
    color: var(--tts-text-muted);
    margin: 10px 0 0;
    text-align: center;
}

.tts-action-box__notice {
    font-size: 13px;
    line-height: 1.5;
    color: var(--tts-text-muted);
    margin: 0 0 14px;
}

/* Danh sách khóa học tặng kèm cho học viên */
.tts-action-box__student-wrap {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tts-action-box__student-desc {
    font-size: 13px;
    line-height: 1.5;
    color: var(--tts-text-muted);
    margin: 0;
}

.tts-linked-courses-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
}

.tts-linked-course-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 9px 12px;
    background: #ffffff;
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius-sm);
    transition: border-color 0.15s ease;
}

.tts-linked-course-item:hover {
    border-color: var(--tts-border-hover);
}

.tts-linked-course-item__info {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--tts-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tts-linked-course-item__info .tts-svg-icon {
    color: var(--tts-warning);
}

.tts-linked-course-item__title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tts-linked-course-item__btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    color: var(--tts-primary);
    text-decoration: none;
    flex-shrink: 0;
}

.tts-linked-course-item__btn:hover {
    color: var(--tts-primary-hover);
}

/* Box sao chép mật khẩu / Token 1-Click */
.tts-secret-box {
    background: #ffffff;
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius-sm);
    padding: 10px 12px;
    margin-top: 14px;
}

.tts-secret-box__label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--tts-text-muted);
    margin-bottom: 6px;
}

.tts-secret-box__field {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background: var(--tts-bubble-bg);
    border-radius: 6px;
    padding: 6px 10px;
}

.tts-secret-box__value {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--tts-text);
    word-break: break-all;
}

.tts-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #ffffff;
    border: 1px solid var(--tts-border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 600;
    color: var(--tts-text);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.tts-copy-btn:hover {
    background: var(--tts-bubble-bg);
    border-color: var(--tts-border-hover);
}

.tts-copy-btn.is-copied {
    background: var(--tts-success-bg);
    color: var(--tts-success);
    border-color: var(--tts-success-border);
}

/* Hướng dẫn cài đặt chi tiết */
.tts-install-doc-box {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed var(--tts-border);
    font-size: 13px;
    line-height: 1.55;
}

.tts-install-doc-box__title {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: 600;
    color: var(--tts-text);
    margin-bottom: 6px;
}

.tts-install-doc-box__content {
    color: var(--tts-text-muted);
    font-size: 13px;
}

/* Widget thông số yêu cầu */
.tts-spec-box {
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 18px 20px;
    box-shadow: var(--tts-shadow);
}

.tts-spec-box__title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--tts-text);
    margin: 0 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.tts-spec-box__list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tts-spec-box__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 13px;
    padding-bottom: 6px;
    border-bottom: 1px dashed var(--tts-border);
}

.tts-spec-box__item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.tts-spec-box__label {
    color: var(--tts-text-muted);
    font-weight: 500;
}

.tts-spec-box__val {
    color: var(--tts-text);
    font-weight: 600;
    text-align: right;
}

.tts-spec-box__val--tag {
    background: var(--tts-bubble-bg);
    padding: 2px 7px;
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 12px;
}

/* Hộp Cross-sell Khóa Học (Tam Giác Chuyển Đổi) */
.tts-cross-sell-box {
    background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--tts-radius);
    padding: 20px;
}

.tts-cross-sell-box__badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 700;
    color: var(--tts-accent);
    text-transform: uppercase;
    margin-bottom: 8px;
    letter-spacing: 0.04em;
}

.tts-cross-sell-box__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--tts-text);
    margin: 0 0 8px;
}

.tts-cross-sell-box__desc {
    font-size: 13px;
    line-height: 1.5;
    color: var(--tts-text-muted);
    margin: 0 0 14px;
}

/* ==========================================================================
   TAB "CÔNG CỤ CỦA TÔI" TRONG WOOCOMMERCE MY ACCOUNT
   ========================================================================== */
.tts-my-tools {
    display: flex;
    flex-direction: column;
}

.tts-my-tools__header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--tts-border);
}

.tts-my-tools__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 700;
    color: var(--tts-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.tts-my-tools__title {
    margin: 0 0 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--tts-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tts-my-tools__count-badge {
    background: var(--tts-primary);
    color: #ffffff;
    font-size: 12px;
    font-weight: 700;
    padding: 1px 8px;
    border-radius: var(--tts-radius-pill);
}

.tts-my-tools__desc {
    font-size: 14px;
    color: var(--tts-text-muted);
    margin: 0;
    line-height: 1.5;
}

.tts-my-tools__empty {
    margin-top: 10px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MOBILE-FIRST TUYỆT ĐỐI 390px - DESKTOP)
   ========================================================================== */
@media (max-width: 1024px) {
    .tts-single-layout {
        grid-template-columns: 1fr;
    }

    .tts-sidebar-sticky {
        position: static;
    }
}

@media (max-width: 900px) {
    .tts-toolbar-header {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 10px 12px;
    }

    .tts-toolbar-header__title-wrap {
        justify-content: flex-start;
    }

    .tts-toolbar-header__actions {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
    }

    .tts-toolbar-header .tts-pills {
        flex: 1 1 auto;
    }

    .tts-toolbar-header .tts-search-box {
        min-width: 170px;
        max-width: 220px;
    }
}

@media (max-width: 640px) {
    .tts-wrapper {
        padding: 12px 0 36px;
    }

    .tts-container {
        padding: 0 12px;
    }

    .tts-toolbar-header {
        padding: 10px;
        margin-bottom: 12px;
        border-radius: var(--tts-radius);
    }

    .tts-toolbar-header__actions {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .tts-toolbar-header .tts-pills {
        width: 100%;
    }

    .tts-toolbar-header .tts-search-box {
        min-width: 100%;
        max-width: 100%;
    }

    .tts-header {
        padding: 14px 14px;
        margin-bottom: 12px;
    }

    .tts-header__title {
        font-size: 16px;
    }

    .tts-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 10px;
        margin-bottom: 12px;
    }

    .tts-search-box {
        min-width: 100%;
    }

    .tts-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .tts-single-title {
        font-size: 20px;
    }

    .tts-main-content {
        padding: 16px;
    }

    .tts-action-box {
        padding: 16px;
    }
}