/* ==========================================================================
   P4 — Tài liệu & Tải xuống
   Match style: var(--color-primary) primary, card pattern, flatsome typography
   ========================================================================== */

/* Section header */
.tttech-resource-section { margin-bottom: 40px; }
.tttech-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 10px 16px;
    border-left: 5px solid var(--color-primary);
    background: linear-gradient(135deg, var(--color-border-light) 0%, var(--color-border) 100%);
    border-radius: 0 4px 4px 0;
}
.tttech-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.tttech-section-title i { color: var(--color-primary); }
.tttech-see-all {
    font-size: 0.8125em;
    color: var(--color-primary);
    text-decoration: none;
    white-space: nowrap;
}
.tttech-see-all:hover { color: var(--color-accent); }

/* Filter chips */
.tttech-resource-filters {
    text-align: center;
    margin-bottom: 28px;
}
.tttech-resource-filters .nav {
    display: inline-flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
    padding: 4px;
    background: #ebebeb;
    border-radius: 999px;
}
/* Override Flatsome nav-pills sizing — load sau Flatsome nên không cần !important */
.tttech-resource-filters .nav > li > a,
.tttech-resource-filters .nav > li > a.nav-top-link {
    padding: 7px 18px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    height: auto;
    border-radius: 999px;
    letter-spacing: 0.02em;
    color: #555;
    background: transparent;
}
.tttech-resource-filters .nav > li.active > a,
.tttech-resource-filters .nav > li.active > a.nav-top-link {
    background: var(--color-primary, #0069af);
    color: #fff;
}
.tttech-filter-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.12);
    border-radius: 999px;
    padding: 0 6px;
    min-width: 20px;
    height: 18px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 6px;
    vertical-align: middle;
    line-height: 1;
}
.nav li.active .tttech-filter-count {
    background: rgba(255,255,255,0.3);
}

/* Filter heading */
.tttech-filter-heading {
    font-size: 1.25em;
    margin-bottom: 20px;
    color: var(--color-text);
}
.tttech-filter-total {
    color: var(--color-text-muted);
    font-weight: 400;
    font-size: 1em;
}

/* --- RESOURCE CARD --- */
.tttech-resource-grid {
    display: grid;
    gap: 20px;
}
.tttech-resource-grid-4 { grid-template-columns: repeat(4, 1fr); }
.tttech-resource-grid-3 { grid-template-columns: repeat(3, 1fr); }

.tttech-resource-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.tttech-resource-card:hover {
    box-shadow: 0 12px 30px rgba(0,51,102,0.15);
    transform: translateY(-6px);
}

/* Thumb */
.tttech-resource-thumb {
    position: relative;
    background: var(--color-bg-light, #f5f5f5);
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border, #e0e0e0);
}
.tttech-resource-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.tttech-resource-thumb-placeholder {
    width: 80px;
    height: 80px;
    background: var(--color-border, #e0e0e0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.tttech-resource-thumb-placeholder i {
    font-size: 2.5em;
    color: var(--color-primary, #0069af);
    opacity: 0.5;
}
.tttech-resource-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--color-primary);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}
.tttech-external-badge {
    background: #f0f7ff;
    color: var(--color-accent);
    border: 1px solid #c8dff5;
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 11px;
}

/* Body */
.tttech-resource-body { padding: 14px 14px 10px; flex: 1; }
.tttech-resource-title {
    font-size: 0.9375em;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 8px;
}
.tttech-resource-title a {
    color: var(--color-text);
    text-decoration: none;
}
.tttech-resource-title a:hover { color: var(--color-primary); }
.tttech-resource-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 0.8125em;
    color: var(--color-text-muted);
}
.tttech-resource-meta span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* Download button */
.tttech-download-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin: 0 14px 14px !important;
}
.tttech-download-btn i { margin-right: 2px; }
.tttech-download-btn-sm i { font-size: 0.55em; }

/* --- GROUP CARDS --- */
.tttech-resource-groups {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.tttech-group-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-decoration: none !important;
    color: inherit;
    transition: all 0.2s;
    border-left: 5px solid var(--color-primary);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.2s;
}
.tttech-group-card:hover {
    background: var(--color-border-light);
    box-shadow: 0 8px 20px rgba(0,51,102,0.12);
    transform: translateY(-4px);
}
.tttech-group-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.tttech-group-icon i { font-size: 1.8em; color: var(--color-primary); }
.tttech-group-icon img { width: 36px; height: 36px; object-fit: contain; }
.tttech-group-info { flex: 1; }
.tttech-group-name {
    display: block;
    font-size: 0.9375em;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 3px;
}
.tttech-group-count {
    font-size: 0.8125em;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}
.tttech-group-arrow { color: #aaa; font-size: 0.9em; }

/* --- LIST ITEMS --- */
.tttech-resource-list { display: flex; flex-direction: column; }
.tttech-resource-list-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
}
.tttech-resource-list-item:last-child { border-bottom: none; }
.tttech-list-thumb {
    flex-shrink: 0;
    width: 80px;
    height: 60px; /* 4:3 landscape ratio */
    background: var(--color-bg-light);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.tttech-list-cover { width: 100%; height: 100%; object-fit: cover; }
.tttech-list-thumb-placeholder i { font-size: 1.6em; color: var(--color-primary); opacity: 0.4; }
.tttech-list-body { flex: 1 }
.tttech-list-title { font-size: 0.9375em; font-weight: 600; margin: 0 0 5px; }
.tttech-list-title a { color: var(--color-text); text-decoration: none; }
.tttech-list-title a:hover { color: var(--color-primary); }
.tttech-list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8125em;
    color: var(--color-text-muted);
}
.tttech-meta-type {
    background: var(--color-border);
    color: var(--color-primary);
    border-radius: 3px;
    padding: 1px 6px;
    font-weight: 600;
}
.tttech-meta-brand { color: var(--color-text-subtle); }
.tttech-download-btn-sm {
    flex-shrink: 0;
    background: var(--color-primary) !important;
    color: #fff !important;
    border-color: var(--color-primary) !important;
    font-size: 12px !important;
    padding: 6px 12px !important;
    white-space: nowrap;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: 4px;
    text-align: center;
}
.tttech-download-btn-sm:hover {
    background: var(--color-primary-hover) !important;
    color: #fff !important;
}

/* Responsive */
@media (max-width: 849px) {
    .tttech-resource-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .tttech-resource-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .tttech-resource-groups { grid-template-columns: 1fr; }
}
@media (max-width: 549px) {
    /* Grid: 1 cột */
    .tttech-resource-grid-4,
    .tttech-resource-grid-3 { grid-template-columns: 1fr; }

    /* Cards */
    .tttech-resource-thumb { height: 120px; }
    .tttech-resource-body { padding: 10px 12px 8px; }
    .tttech-resource-title { font-size: 13px; }

    /* List items */
    .tttech-list-thumb { display: none; }
    .tttech-resource-list-item { padding: 10px 0; }

    /* Group cards */
    .tttech-group-card { padding: 12px 14px; }
    .tttech-group-icon { width: 40px; height: 40px; }
    .tttech-group-icon i { font-size: 1.4em; }
    .tttech-group-name { font-size: 13px; }

    /* Download button full width */
    .tttech-download-btn {
        margin: 0 10px 10px !important;
        width: calc(100% - 20px) !important;
        font-size: 12px !important;
        padding: 7px 12px !important;
    }

    /* Section header */
    .tttech-section-title { font-size: 1rem; }
    .tttech-resource-section { margin-bottom: 28px; }

    /* Filter chips — horizontal scroll */
    .tttech-resource-filters {
        position: relative;
        margin-left: 0;
        margin-right: 0;
        padding: 0;
        text-align: left;
    }
    .tttech-resource-filters .nav.nav-pills {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        justify-content: flex-start;
        align-items: center;
        gap: 4px;
        padding: 2px 6px;
        background: #ebebeb;
        border-radius: 999px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .tttech-resource-filters .nav.nav-pills::-webkit-scrollbar { display: none; }
    .tttech-resource-filters .nav.nav-pills > li {
        flex: 0 0 auto;
        display: flex;
        align-items: center;
    }
    .tttech-resource-filters .nav.nav-pills > li > a,
    .tttech-resource-filters .nav.nav-pills > li > a.nav-top-link {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        white-space: nowrap;
        min-width: unset;
        height: 34px;
        padding: 7px 18px;
        font-size: 12px;
        line-height: 1;
        border-radius: 999px;
    }
    .tttech-resource-filters .tttech-filter-count {
        display: inline-flex;
        align-items: center;
        white-space: nowrap;
        flex-shrink: 0;
        margin-left: 3px;
    }
    /* Fade edge gợi ý scroll */
    .tttech-resource-filters::after {
        content: '';
        position: absolute;
        right: 0; top: 0; bottom: 0;
        width: 32px;
        background: linear-gradient(to right, transparent, rgba(248,248,248,0.95));
        pointer-events: none;
        z-index: 1;
    }
}

/* Sort bar — mobile */
@media (max-width: 549px) {
    .tttech-sort-bar {
        flex-wrap: wrap;
        gap: 8px;
        font-size: 12px;
        margin-bottom: 12px;
    }
    .tttech-sort-links {
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 4px;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .tttech-sort-links::-webkit-scrollbar { display: none; }
    .tttech-sort-link {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 4px 10px;
        font-size: 11px;
    }
}

/* ==========================================================================
   Option B — Sidebar Filter (match Flatsome widget style)
   ========================================================================== */

/* Sidebar section wrapper */
.tttech-sidebar-section {
    margin-bottom: 16px;
}
.tttech-sidebar-title {
    font-size: 0.75em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
    margin: 0 0 4px;
    padding-bottom: 4px;
    border-bottom: 2px solid var(--color-primary);
}

/* Reset filters link */
.tttech-reset-filters {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.875em;
    color: #c0392b;
    text-decoration: none;
    padding: 4px 0;
    transition: opacity 0.2s;
}
.tttech-reset-filters:hover { opacity: 0.75; color: #c0392b; }
.tttech-reset-filters i { font-size: 0.9em; }

/* Subcategory children — thụt lề */
.tttech-sidebar-children {
    list-style: none;
    margin: 0;
    padding: 0 0 0 12px;
    border-left: 2px solid var(--color-border);
}
.tttech-sidebar-children li {
    border-bottom: none !important;
}
.tttech-sidebar-children li a {
    font-size: 0.9em;
    padding: 5px 4px !important;
    color: #666;
}
.tttech-sidebar-children li.active a {
    color: var(--color-primary);
    font-weight: 600;
}

.tttech-sidebar-filter {
    list-style: none;
    margin: 0 0 8px;
    padding: 0;
}
.tttech-sidebar-filter li {
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: 0;
    margin-left: 0;
}
.col-inner .tttech-sidebar-filter li,
.col-inner ul.tttech-sidebar-filter li {
    margin-left: 0;
    margin-bottom: 0;
    list-style: none;
}
.tttech-sidebar-filter li:last-child { border-bottom: none; }
.tttech-sidebar-filter li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 4px;
    font-size: 0.875em;
    color: #444;
    text-decoration: none;
    transition: color 0.2s;
}
.tttech-sidebar-filter li a:hover,
.tttech-sidebar-filter li.active > a {
    color: var(--color-primary);
    font-weight: 600;
}
.tttech-sidebar-filter li.active > a {
    padding-left: 9px;
    border-left: 3px solid var(--color-primary);
}
.tttech-sidebar-count {
    background: var(--color-border-light);
    border-radius: 10px;
    padding: 1px 6px;
    font-size: 0.8em;
    color: var(--color-text-muted);
}
.tttech-sidebar-filter li.active .tttech-sidebar-count {
    background: var(--color-border);
    color: var(--color-primary);
}

/* Pagination spacing */
.tttech-pagination-wrap {
    margin-top: 32px;
}

/* Sort bar */
.tttech-sort-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 0.875em;
}
.tttech-sort-label { color: var(--color-text-muted); white-space: nowrap; }
.tttech-sort-links { display: flex; gap: 6px; flex-wrap: wrap; }
.tttech-sort-link {
    padding: 4px 12px;
    border-radius: 4px;
    border: 1px solid var(--color-border);
    color: var(--color-text-subtle);
    text-decoration: none;
    font-size: 0.875em;
    transition: all 0.2s;
}
.tttech-sort-link:hover { border-color: var(--color-primary); color: var(--color-primary); }
.tttech-sort-link.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}