/* =============================================
   NCE - Nghị Định 116 | style.css
   Trường Cao Đẳng Sư Phạm Trung Ương
   ============================================= */

/* --- CSS Variables --- */
:root {
    --primary: #f47612;
    --primary-dark: #d4620e;
    --primary-light: #ffa04d;
    --primary-bg: #fff8f2;
    --secondary: #1a3a5c;
    --secondary-dark: #0f2540;
    --secondary-light: #2a5080;
    --accent: #e8f4fd;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --font-main: 'Inter', sans-serif;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-orange: 0 4px 20px rgba(244, 118, 18, 0.25);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s ease;
    --section-py: 80px;
}

/* --- Base Reset --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--gray-900);
}

/* --- Utility --- */
.text-primary {
    color: var(--primary) !important;
}

.text-secondary-custom {
    color: var(--secondary) !important;
}

.bg-primary-custom {
    background-color: var(--primary) !important;
}

.bg-secondary-custom {
    background-color: var(--secondary) !important;
}

.section-py {
    padding: var(--section-py) 0;
}

.section-bg {
    background-color: var(--gray-50);
}

/* --- Section Header --- */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header .badge-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 50px;
    border: 1px solid rgba(244, 118, 18, 0.2);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: clamp(26px, 4vw, 38px);
    color: var(--secondary);
    margin-bottom: 16px;
}

.section-header h2 span,
.section-header h2 strong {
    color: var(--primary);
    font-weight: 700;
}

.section-header p {
    font-size: 17px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 4px;
    margin: 20px auto 0;
}

/* =======================
   HEADER / NAVBAR
   ======================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.topbar {
    background: var(--secondary);
    color: var(--white);
    padding: 8px 0;
    font-size: 13px;
}

.topbar a {
    color: rgba(255, 255, 255, 0.85);
}

.topbar a:hover {
    color: var(--primary);
}

.topbar .topbar-contact {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.topbar .topbar-contact span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.topbar .topbar-contact i {
    color: var(--primary);
}

.navbar {
    padding: 14px 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-brand img {
    height: 52px;
    width: 52px;
    object-fit: contain;
    border-radius: 8px;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-text .brand-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 0.2px;
}

.brand-text .brand-sub {
    font-size: 11px;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.navbar-nav .nav-link {
    font-weight: 500;
    font-size: 15px;
    color: var(--gray-700) !important;
    padding: 8px 14px !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary) !important;
    background: var(--primary-bg);
}

.navbar-nav .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: 10px;
    margin-top: 8px;
}

.navbar-nav .dropdown-item {
    border-radius: var(--radius-sm);
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition);
}

.navbar-nav .dropdown-item:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.navbar-nav .dropdown-item i {
    width: 20px;
    color: var(--primary);
}

/* Parent menu text always stays a real link. Hover expands on desktops. */
.site-header .navbar-nav .nce-submenu-toggle {
    display: none;
}

@media (min-width: 992px) and (hover: hover) {
    .site-header .navbar-nav > li.dropdown:hover > ul.dropdown-menu,
    .site-header .navbar-nav > li.dropdown:focus-within > ul.dropdown-menu {
        display: block;
        margin-top: 0; /* No mouse gap between parent and submenu. */
    }
}

/* Touch devices get their own accessible chevron toggle. */
@media (max-width: 991.98px), (hover: none) {
    .site-header .navbar-nav > li.dropdown {
        position: relative;
    }

    .site-header .navbar-nav > li.dropdown > a.dropdown-toggle {
        padding-right: 50px !important;
    }

    .site-header .navbar-nav > li.dropdown > a.dropdown-toggle::after {
        display: none;
    }

    .site-header .navbar-nav > li.dropdown > .nce-submenu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        z-index: 2;
        top: 0;
        right: 0;
        width: 42px;
        height: 40px;
        border: 0;
        border-radius: 8px;
        background: transparent;
        color: var(--gray-700);
        cursor: pointer;
    }

    .site-header .navbar-nav > li.dropdown > .nce-submenu-toggle span {
        width: 8px;
        height: 8px;
        border-right: 2px solid currentColor;
        border-bottom: 2px solid currentColor;
        transform: translateY(-2px) rotate(45deg);
        transition: transform .2s ease;
    }

    .site-header .navbar-nav > li.dropdown > .nce-submenu-toggle[aria-expanded="true"] span {
        transform: translateY(2px) rotate(225deg);
    }

    .site-header .navbar-nav > li.dropdown > .nce-submenu-toggle:hover,
    .site-header .navbar-nav > li.dropdown > .nce-submenu-toggle:focus-visible {
        background: var(--primary-bg);
        color: var(--primary);
    }

    .site-header .navbar-nav > li.dropdown > ul.dropdown-menu {
        margin-top: 0;
    }
}

.btn-nav-cta {
    background: var(--primary) !important;
    color: var(--white) !important;
    border-radius: 50px !important;
    padding: 8px 22px !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    box-shadow: var(--shadow-orange);
    transition: var(--transition) !important;
}

.btn-nav-cta:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(244, 118, 18, 0.35) !important;
}

/* =======================
   HERO SECTION
   ======================= */
.hero-section {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 50%, #1e4d7a 100%);
    padding: 80px 0 60px;
    overflow: hidden;
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(244, 118, 18, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(244, 118, 18, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(244, 118, 18, 0.15);
    border: 1px solid rgba(244, 118, 18, 0.3);
    color: var(--primary-light);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-badge i {
    color: var(--primary);
}

.hero-title {
    font-size: clamp(30px, 5vw, 52px);
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title .highlight,
.hero-title strong {
    color: var(--primary);
    position: relative;
}

.hero-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 36px;
    line-height: 1.8;
    max-width: 560px;
}

.hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-stat {
    text-align: center;
}

.hero-stat .stat-number {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.hero-stat .stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.65);
    margin-top: 4px;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn-hero-primary {
    background: var(--primary);
    color: var(--white);
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 15px;
    border: none;
    box-shadow: var(--shadow-orange);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-hero-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(244, 118, 18, 0.4);
}

.btn-hero-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.35);
    color: var(--white);
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-hero-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(244, 118, 18, 0.08);
}

.hero-img-wrap {
    position: relative;
    z-index: 1;
}

.hero-img-wrap img {
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    width: 100%;
}

.hero-card-float {
    position: absolute;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}

.hero-card-float.card-1 {
    bottom: 40px;
    left: -20px;
}

.hero-card-float.card-2 {
    top: 30px;
    right: -15px;
}

.hero-card-float .float-icon {
    width: 42px;
    height: 42px;
    background: var(--primary-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 18px;
    flex-shrink: 0;
}

.hero-card-float .float-text .label {
    font-size: 11px;
    color: var(--gray-400);
    font-weight: 500;
}

.hero-card-float .float-text .value {
    font-size: 15px;
    font-weight: 700;
    color: var(--secondary);
}

/* =======================
   ABOUT / INTRO SECTION
   ======================= */
.about-section {
    padding: var(--section-py) 0;
}

.about-icon-box {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 22px;
    margin-bottom: 16px;
    transition: var(--transition);
}

.about-icon-box:hover {
    border-color: rgba(244, 118, 18, 0.3);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.about-icon-box .icon {
    width: 50px;
    height: 50px;
    background: var(--primary-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 22px;
    flex-shrink: 0;
}

.about-icon-box h5 {
    font-size: 16px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 6px;
}

.about-icon-box p {
    font-size: 14px;
    color: var(--gray-500);
    margin: 0;
    line-height: 1.6;
}

.about-img-box {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-img-box img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.about-img-badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: var(--primary);
    color: var(--white);
    padding: 16px 22px;
    border-radius: var(--radius-md);
    font-weight: 700;
}

.about-img-badge .num {
    font-size: 28px;
    line-height: 1;
}

.about-img-badge .txt {
    font-size: 13px;
    opacity: 0.9;
}

/* =======================
   NEWS / ANNOUNCEMENTS
   ======================= */
.news-section {
    padding: var(--section-py) 0;
    background: var(--gray-50);
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    border: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(244, 118, 18, 0.2);
}

.news-card-img {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.news-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.news-card-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    color: var(--white);
}

.news-card-badge.type-tb {
    background: var(--primary);
}

.news-card-badge.type-cs {
    background: var(--secondary);
}

.news-card-badge.type-sk {
    background: #16a34a;
}

.news-card-body {
    padding: 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.news-card-meta span {
    font-size: 12px;
    color: var(--gray-400);
    display: flex;
    align-items: center;
    gap: 5px;
}

.news-card-meta i {
    color: var(--primary);
}

.news-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 10px;
    line-height: 1.5;
    transition: var(--transition);
}

.news-card:hover .news-card-title {
    color: var(--primary);
}

.news-card-excerpt {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
    flex: 1;
}

.news-card-footer {
    padding: 14px 22px;
    border-top: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.news-card-footer a {
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.news-card-footer a:hover {
    gap: 8px;
}

/* =======================
   LESSONS SECTION
   ======================= */
.lessons-section {
    padding: var(--section-py) 0;
}

.lesson-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    height: 100%;
}

.lesson-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(244, 118, 18, 0.3);
}

.lesson-thumb {
    padding-top: 56.25%;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    position: relative;
    display: block;
    overflow: hidden;
}

.lesson-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lesson-thumb .play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 54px;
    height: 54px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    box-shadow: 0 4px 20px rgba(244, 118, 18, 0.5);
    transition: var(--transition);
    cursor: pointer;
    z-index: 2;
}

.lesson-thumb .play-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--primary-dark);
}

.lesson-number {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(0, 0, 0, 0.55);
    color: var(--white);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
}

.lesson-body {
    padding: 22px;
}

.lesson-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.lesson-desc {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 16px;
    line-height: 1.7;
}

.lesson-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.lesson-feature-tag {
    display: flex;
    align-items: center;
    gap: 5px;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 50px;
}

.lesson-feature-tag i {
    color: var(--primary);
    font-size: 11px;
}

.lesson-footer {
    padding: 16px 22px;
    background: var(--gray-50);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--gray-200);
}

.btn-lesson-detail {
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.btn-lesson-detail:hover {
    gap: 8px;
    color: var(--primary-dark);
}

.btn-lesson-quiz {
    background: var(--primary);
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-lesson-quiz:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-orange);
}

/* =======================
   QUIZ SECTION
   ======================= */
.quiz-section {
    padding: var(--section-py) 0;
    background: var(--gray-50);
}

.quiz-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 26px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    display: flex;
    gap: 18px;
    align-items: flex-start;
    height: 100%;
}

.quiz-card:hover {
    border-color: rgba(244, 118, 18, 0.3);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.quiz-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.quiz-icon.orange {
    background: var(--primary-bg);
    color: var(--primary);
}

.quiz-icon.blue {
    background: #e8f0fe;
    color: #1a73e8;
}

.quiz-icon.green {
    background: #e6f4ea;
    color: #1e8b4c;
}

.quiz-icon.purple {
    background: #f3e8ff;
    color: #7c3aed;
}

.quiz-content {
    flex: 1;
}

.quiz-content h5 {
    font-size: 16px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
}

.quiz-content p {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 14px;
    line-height: 1.6;
}

.quiz-meta {
    display: flex;
    gap: 14px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.quiz-meta span {
    font-size: 13px;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 5px;
}

.quiz-meta i {
    color: var(--primary);
}

.btn-start-quiz {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: var(--secondary);
    color: var(--white);
    padding: 9px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-start-quiz:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-orange);
}

/* =======================
   BLOG SECTION
   ======================= */
.blog-section {
    padding: var(--section-py) 0;
}

.blog-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(244, 118, 18, 0.2);
}

.blog-card-img {
    height: 200px;
    overflow: hidden;
}

.blog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.blog-card-body {
    padding: 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-tag {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 12px;
}

.blog-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 10px;
    line-height: 1.5;
    transition: var(--transition);
}

.blog-card:hover .blog-card-title {
    color: var(--primary);
}

.blog-card-excerpt {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 16px;
}

.blog-card-meta {
    display: flex;
    gap: 14px;
    font-size: 12px;
    color: var(--gray-400);
    flex-wrap: wrap;
}

.blog-card-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.blog-card-meta i {
    color: var(--primary);
}

/* --- Single Post Share Bar --- */
.blog-share-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding: 20px 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    margin: 32px 0;
}

.blog-share-bar span {
    font-weight: 600;
    font-size: 14px;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 6px;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.share-fb {
    background: #1877f2;
    color: white;
}

.share-fb:hover {
    background: #1560cc;
    color: white;
}

.share-tw {
    background: #1da1f2;
    color: white;
}

.share-tw:hover {
    background: #0d8bd9;
    color: white;
}

.share-zalo {
    background: #0068ff;
    color: white;
}

.share-zalo:hover {
    background: #0054cc;
    color: white;
}

.share-copy {
    background: var(--gray-100);
    color: var(--gray-700);
}

.share-copy:hover {
    background: var(--gray-200);
}

/* =======================
   FAQ SECTION
   ======================= */
.faq-section {
    padding: var(--section-py) 0;
    background: var(--gray-50);
}

.faq-section .accordion-button {
    font-weight: 600;
    font-size: 15px;
    color: var(--secondary);
    background: var(--white);
    border-radius: var(--radius-sm) !important;
    padding: 18px 22px;
}

.faq-section .accordion-button:not(.collapsed) {
    color: var(--primary);
    background: var(--primary-bg);
    box-shadow: none;
}

.faq-section .accordion-button::after {
    filter: invert(58%) sepia(95%) saturate(400%) hue-rotate(2deg);
}

.faq-section .accordion-button:not(.collapsed)::after {
    filter: invert(58%) sepia(95%) saturate(400%) hue-rotate(2deg);
}

.faq-section .accordion-body {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
}

.faq-section .accordion-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm) !important;
    margin-bottom: 12px;
    overflow: hidden;
}

/* =======================
   CTA BANNER
   ======================= */
.cta-section {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
    padding: 70px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(244, 118, 18, 0.15) 0%, transparent 70%);
}

.cta-section h2 {
    font-size: clamp(24px, 4vw, 36px);
    color: var(--white);
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 32px;
}

.btn-cta-white {
    background: var(--white);
    color: var(--secondary);
    border: none;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 15px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.btn-cta-white:hover {
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.btn-cta-primary {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 15px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-orange);
}

.btn-cta-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
}

/* =======================
   FOOTER
   ======================= */
.site-footer {
    background: var(--secondary-dark);
    color: rgba(255, 255, 255, 0.75);
    padding: 70px 0 0;
}

.footer-brand {
    margin-bottom: 20px;
}

.footer-brand img {
    height: 52px;
    margin-bottom: 14px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
}

.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.footer-links li a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-links li a i {
    font-size: 10px;
    color: var(--primary);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-contact-item .fi {
    width: 36px;
    height: 36px;
    background: rgba(244, 118, 18, 0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-contact-item .fc {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact-item .fc strong {
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    display: block;
    margin-bottom: 2px;
}

.footer-contact-item .fc a {
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact-item .fc a:hover {
    color: var(--primary);
}

.footer-author-box {
    background: rgba(244, 118, 18, 0.1);
    border: 1px solid rgba(244, 118, 18, 0.2);
    border-radius: var(--radius-md);
    padding: 18px;
    margin-top: 20px;
}

.footer-author-box .au-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.footer-author-box .au-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 4px;
}

.footer-author-box .au-role {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.5;
    margin-bottom: 10px;
}

.footer-author-box .au-contact a {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 5px;
}

.footer-author-box .au-contact a:hover {
    color: var(--primary);
}

.footer-author-box .au-contact i {
    color: var(--primary);
    width: 14px;
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.3);
    padding: 18px 0;
    margin-top: 50px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: var(--primary);
}

/* =======================
   BUTTONS (Global)
   ======================= */
.btn-primary-custom {
    background: var(--primary);
    color: var(--white);
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: var(--shadow-orange);
    cursor: pointer;
}

.btn-primary-custom:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(244, 118, 18, 0.4);
}

.btn-outline-primary-custom {
    background: transparent;
    color: var(--primary);
    padding: 10px 26px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    border: 2px solid var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    cursor: pointer;
}

.btn-outline-primary-custom:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-orange);
}

/* =======================
   BREADCRUMB
   ======================= */
.page-hero {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
    padding: 50px 0;
    position: relative;
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: var(--white);
    clip-path: ellipse(60% 100% at 50% 100%);
}

.page-hero h1 {
    font-size: clamp(24px, 4vw, 36px);
    color: var(--white);
    margin-bottom: 10px;
}

.page-hero .breadcrumb {
    justify-content: center;
}

.page-hero .breadcrumb-item a {
    color: rgba(255, 255, 255, 0.7);
}

.page-hero .breadcrumb-item a:hover {
    color: var(--primary);
}

.page-hero .breadcrumb-item.active {
    color: var(--primary-light);
}

.page-hero .breadcrumb-item+.breadcrumb-item::before {
    color: rgba(255, 255, 255, 0.4);
}

/* =======================
   ANNOUNCEMENT TICKER
   ======================= */
.ticker-wrap {
    background: var(--primary);
    padding: 10px 0;
    overflow: hidden;
    position: relative;
}

.ticker-wrap .ticker-label {
    background: var(--secondary);
    color: var(--white);
    font-size: 13px;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: 0 50px 50px 0;
    white-space: nowrap;
    flex-shrink: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    height: 100%;
}

.ticker-container {
    display: flex;
    align-items: center;
    height: 36px;
    overflow: hidden;
}

.ticker-content {
    display: flex;
    align-items: center;
    animation: ticker-scroll 30s linear infinite;
    white-space: nowrap;
    padding-left: 160px;
}

.ticker-content:hover {
    animation-play-state: paused;
}

.ticker-content a {
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    padding: 0 30px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ticker-content a::before {
    content: '●';
    color: rgba(255, 255, 255, 0.5);
    font-size: 8px;
}

.ticker-content a:hover {
    color: var(--secondary);
}

@keyframes ticker-scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

/* =======================
   VIEW ALL LINK
   ======================= */
.view-all-wrap {
    text-align: center;
    margin-top: 48px;
}

.btn-view-all {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    font-size: 15px;
    padding: 12px 28px;
    border: 2px solid var(--primary);
    border-radius: 50px;
    transition: var(--transition);
}

.btn-view-all:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-orange);
}

/* =======================
   SCROLL TO TOP
   ======================= */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-orange);
    cursor: pointer;
    transition: var(--transition);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* =======================
   RESPONSIVE
   ======================= */
@media (max-width: 991px) {
    :root {
        --section-py: 60px;
    }

    .hero-section {
        padding: 60px 0 50px;
    }

    .hero-img-wrap {
        margin-top: 40px;
    }

    .hero-card-float {
        display: none;
    }

    .topbar .topbar-contact {
        display: none;
    }
}

@media (max-width: 767px) {
    :root {
        --section-py: 50px;
    }

    .section-header {
        margin-bottom: 36px;
    }

    .navbar-brand .brand-text .brand-name {
        font-size: 12px;
    }

    .hero-stats {
        gap: 20px;
    }

    .hero-stat .stat-number {
        font-size: 22px;
    }

    .quiz-card {
        flex-direction: column;
    }

    .quiz-icon {
        width: 46px;
        height: 46px;
        font-size: 18px;
    }
}

@media (max-width: 576px) {
    .hero-buttons {
        flex-direction: column;
    }

    .btn-hero-primary,
    .btn-hero-outline {
        width: 100%;
        justify-content: center;
    }
}

/* =======================
   QUIZ DETAIL PAGE
   ======================= */
.quiz-start-card {
    max-width: 560px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.quiz-start-header {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    padding: 36px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.quiz-start-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(244, 118, 18, 0.2) 0%, transparent 70%);
}

.quiz-start-header .icon {
    width: 72px;
    height: 72px;
    background: rgba(244, 118, 18, 0.2);
    border: 2px solid rgba(244, 118, 18, 0.3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary);
    margin: 0 auto 20px;
    position: relative;
    z-index: 1;
}

.quiz-start-header h2 {
    color: white;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.quiz-start-header p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
    margin: 0;
    position: relative;
    z-index: 1;
}

.quiz-info-bar {
    background: rgba(244, 118, 18, 0.08);
    border-bottom: 1px solid rgba(244, 118, 18, 0.15);
    padding: 14px 24px;
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.quiz-info-bar span {
    font-size: 13px;
    font-weight: 600;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.quiz-info-bar i {
    color: var(--primary);
}

.quiz-form-body {
    padding: 32px;
}

.btn-start-big {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 16px;
    border-radius: var(--radius-md);
    font-size: 17px;
    font-weight: 700;
    font-family: var(--font-main);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    box-shadow: var(--shadow-orange);
    margin-top: 24px;
}

.btn-start-big:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(244, 118, 18, 0.4);
}

.quiz-header-bar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 0;
    position: sticky;
    top: 115px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

@media (max-width: 991px) {
    .quiz-header-bar {
        top: 65px;
        /* Chiều cao tương đối của navbar mobile */
        border-bottom: 1px solid var(--gray-200);
        border-top: none;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
        margin-bottom: 0;
        z-index: 1000;
    }
}

.quiz-progress-bar {
    height: 6px;
    background: var(--gray-200);
    border-radius: 6px;
    overflow: hidden;
}

.quiz-progress-bar .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 6px;
    transition: width 0.4s ease;
}

.timer-display {
    font-size: 22px;
    font-weight: 800;
    color: var(--secondary);
    font-variant-numeric: tabular-nums;
}

.timer-display.urgent {
    color: #dc2626;
    animation: blink-timer 1s ease infinite;
}

@keyframes blink-timer {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.quiz-body-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 28px;
    align-items: start;
    margin-top: 32px;
}

.quiz-tracker-sidebar {
    position: sticky;
    top: 260px;
    align-self: start;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.tracker-header {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tracker-header h5 {
    color: white;
    font-size: 14px;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tracker-header .tracker-count {
    background: var(--primary);
    color: white;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 50px;
}

.tracker-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    padding: 16px;
}

.tracker-dot {
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: 8px;
    border: 2px solid var(--gray-200);
    background: var(--gray-50);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--gray-500);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.tracker-dot:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
}

.tracker-dot.answered {
    background: #dcfce7;
    border-color: #16a34a;
    color: #16a34a;
}

.tracker-dot.answered::after {
    content: '';
    position: absolute;
    bottom: 3px;
    right: 3px;
    width: 8px;
    height: 8px;
    background: #16a34a;
    border-radius: 50%;
}

.tracker-dot.current {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(244, 118, 18, 0.4);
}

.tracker-dot.answered.current {
    background: #16a34a;
    border-color: #16a34a;
    color: white;
}

.tracker-legend {
    padding: 12px 16px;
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tracker-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--gray-500);
}

.tracker-legend-item .dot {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    flex-shrink: 0;
}

.tracker-submit-btn {
    width: calc(100% - 32px);
    margin: 14px 16px;
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font-main);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.tracker-submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-orange);
}

.question-block {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 20px;
    transition: var(--transition);
    scroll-margin-top: 230px;
}

.question-block:hover {
    border-color: rgba(244, 118, 18, 0.2);
}

.question-block.answered-block {
    border-left: 3px solid #16a34a;
}

.question-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--primary);
    color: white;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    margin-right: 12px;
    flex-shrink: 0;
}

.question-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.6;
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 10px;
    font-size: 15px;
    color: var(--gray-700);
}

.quiz-option:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 600;
}

.quiz-option input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    flex-shrink: 0;
}

.quiz-option-letter {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--gray-500);
    flex-shrink: 0;
    transition: var(--transition);
}

.quiz-option.selected .quiz-option-letter {
    background: var(--primary);
    color: white;
}

.result-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    text-align: center;
}

.result-header {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    padding: 40px;
}

.result-score-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 5px solid var(--primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: rgba(244, 118, 18, 0.1);
}

.result-score-circle .score-num {
    font-size: 30px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.result-score-circle .score-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

.result-body {
    padding: 36px;
}

@media (max-width:991px) {
    .quiz-body-layout {
        grid-template-columns: 1fr;
    }

    .quiz-tracker-sidebar {
        position: static !important;
        order: 2;
        margin-top: 24px;
    }

    #questions-wrap {
        order: 1;
    }
}

/* =======================
   LESSON DETAIL PAGE
   ======================= */
.video-wrap {
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16/9;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.video-wrap iframe,
.video-wrap video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: none;
}

.video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.video-placeholder:hover .vp-play {
    transform: scale(1.1);
}

.vp-play {
    width: 72px;
    height: 72px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    margin-bottom: 16px;
    box-shadow: 0 4px 24px rgba(244, 118, 18, 0.5);
    transition: var(--transition);
}

.mindmap-wrap {
    background: var(--gray-50);
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.mindmap-wrap:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.mindmap-wrap img {
    max-width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.mindmap-wrap:hover img {
    transform: scale(1.02);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.gallery-item {
    aspect-ratio: 4/3;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    background: var(--gray-200);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.lesson-nav-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: var(--transition);
    text-decoration: none;
}

.lesson-nav-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.lesson-nav-card i {
    color: var(--primary);
    font-size: 20px;
}

.lesson-nav-card .nav-label {
    font-size: 12px;
    color: var(--gray-400);
    margin-bottom: 3px;
}

.lesson-nav-card .nav-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
}

.sidebar-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    overflow: hidden;
}

.sidebar-card-header {
    background: var(--gray-50);
    padding: 14px 20px;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 700;
    font-size: 15px;
    color: var(--secondary);
}

.sidebar-card-header i {
    color: var(--primary);
    margin-right: 8px;
}

.sidebar-lesson-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition);
    cursor: pointer;
}

.sidebar-lesson-item:last-of-type {
    border-bottom: none;
}

.sidebar-lesson-item:hover {
    background: var(--primary-bg);
}

.sidebar-lesson-item.active {
    background: var(--primary-bg);
    border-left: 3px solid var(--primary);
}

.sidebar-lesson-num {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--gray-100);
    color: var(--gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.sidebar-lesson-item.active .sidebar-lesson-num {
    background: var(--primary);
    color: white;
}

.sidebar-lesson-text {
    flex: 1;
}

.sidebar-lesson-text .slt {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    line-height: 1.4;
}

.sidebar-lesson-text .slm {
    font-size: 11px;
    color: var(--gray-400);
    display: flex;
    gap: 8px;
    margin-top: 3px;
}

/* =======================
   LIGHTBOX
   ======================= */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    z-index: 99999;
    display: none;
    flex-direction: column;
}

.lightbox-overlay.active {
    display: flex;
}

.lightbox-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    width: 100%;
}

#lightboxImg {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
    transform-origin: center;
    transition: transform 0.1s ease-out;
    cursor: grab;
    user-select: none;
    animation: lightboxIn 0.3s ease;
}

#lightboxImg:active {
    cursor: grabbing;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 12;
}

.lightbox-close:hover {
    background: var(--primary);
    transform: scale(1.1);
}

.lightbox-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 12;
    background: rgba(0, 0, 0, 0.6);
    padding: 10px 24px;
    border-radius: 50px;
    backdrop-filter: blur(4px);
}

.lightbox-controls button {
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    outline: none;
    transition: 0.2s;
    padding: 5px;
}

.lightbox-controls button:hover {
    color: var(--primary);
    transform: scale(1.1);
}

/* Lightbox nav wrapper — PC: invisible (children are fixed), Mobile: flex row */
.lightbox-nav {
    display: none; /* hidden by default, shown via JS on individual buttons */
    pointer-events: none;
}

.slider-nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 100001;
    backdrop-filter: blur(4px);
    pointer-events: auto;
}

.slider-nav:hover {
    background: var(--primary);
    transform: translateY(-50%) scale(1.1);
}

.slider-nav.prev {
    left: 20px;
}

.slider-nav.next {
    right: 20px;
}

.lightbox-caption {
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
    padding: 20px;
    text-align: center;
    width: 100%;
    z-index: 11;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    position: absolute;
    bottom: 0;
}

@keyframes lightboxIn {
    from {
        opacity: 0;
        transform: scale(0.9)
    }

    to {
        opacity: 1;
        transform: scale(1)
    }
}

@media (max-width:767px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .question-block {
        padding: 10px;
    }

    /* ===== MOBILE LIGHTBOX: nav row bên dưới ảnh, trên zoom ===== */

    /* Overlay: full screen, flex column, căn giữa */
    .lightbox-overlay.active {
        justify-content: center;
        align-items: center;
        gap: 0;
        padding: 56px 0 70px; /* top: chừa cho nút X; bottom: chừa cho zoom bar */
    }

    /* Image area: không fill hết height, chừa chỗ cho nav row */
    .lightbox-content {
        flex: 0 0 auto;
        max-height: 55vh;
        width: 100%;
    }

    #lightboxImg {
        max-height: 55vh;
        max-width: 92vw;
    }

    /* Nav wrapper: flex row bên dưới ảnh */
    .lightbox-nav {
        display: flex !important;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 8px 20px;
        gap: 12px;
        pointer-events: auto;
        flex-shrink: 0;
    }

    /* Nav buttons: static, chiều rộng đều, dạng pill */
    .slider-nav {
        position: static !important;
        transform: none !important;
        flex: 1;
        width: auto;
        height: 46px;
        border-radius: 10px;
        font-size: 18px;
        background: rgba(255, 255, 255, 0.18);
        border: 1px solid rgba(255, 255, 255, 0.25);
    }

    .slider-nav:hover,
    .slider-nav:active {
        transform: none !important;
        background: var(--primary);
        border-color: var(--primary);
    }

    /* Zoom controls: absolute ở dưới cùng overlay */
    .lightbox-controls {
        bottom: 12px;
    }
}

/* =======================
   FAQ SPECIFIC STYLES
   ======================= */
/* ===== FAQ SEARCH BOX ===== */
.faq-search-wrap {
    max-width: 680px;
    margin: 0 auto 40px;
    position: relative;
}

.faq-search-input {
    width: 100%;
    padding: 16px 56px 16px 22px;
    border: 2px solid var(--gray-200);
    border-radius: 50px;
    font-size: 16px;
    font-family: var(--font-main);
    outline: none;
    transition: var(--transition);
    background: var(--white);
    box-shadow: var(--shadow-md);
    color: var(--gray-800);
}

.faq-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(244, 118, 18, 0.12), var(--shadow-md);
}

.faq-search-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 18px;
    pointer-events: none;
}

.faq-search-input:focus+.faq-search-icon {
    color: var(--primary);
}

.search-result-count {
    text-align: center;
    font-size: 14px;
    color: var(--gray-400);
    margin-top: 10px;
    min-height: 20px;
}

/* ===== CATEGORY TABS ===== */
.faq-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 40px;
}

.faq-tab {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-600);
    transition: var(--transition);
    user-select: none;
    font-family: var(--font-main);
}

.faq-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

.faq-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(244, 118, 18, 0.3);
}

.faq-tab .tab-count {
    background: rgba(255, 255, 255, 0.25);
    padding: 1px 7px;
    border-radius: 50px;
    font-size: 11px;
}

.faq-tab:not(.active) .tab-count {
    background: var(--gray-100);
    color: var(--gray-500);
}

/* ===== CATEGORY GROUP ===== */
.faq-category-group {
    margin-bottom: 40px;
}

.faq-category-title {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 17px;
    font-weight: 700;
    color: var(--secondary);
}

.faq-category-title .cat-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.faq-category-title .cat-badge {
    margin-left: auto;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 50px;
    background: var(--primary);
    color: white;
}

/* ===== ACCORDION ===== */
.faq-accordion .accordion-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md) !important;
    margin-bottom: 10px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-accordion .accordion-item:hover {
    border-color: rgba(244, 118, 18, 0.3);
    box-shadow: var(--shadow-sm);
}

.faq-accordion .accordion-item.faq-hidden {
    display: none;
}

.faq-accordion .accordion-button {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-md) !important;
    box-shadow: none !important;
    font-family: var(--font-main);
    gap: 12px;
}

.faq-accordion .accordion-button:not(.collapsed) {
    color: var(--primary);
    background: var(--primary-bg);
    border-bottom: 1px solid rgba(244, 118, 18, 0.15);
}

.faq-accordion .accordion-button::after {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background-image: none !important;
    display: flex;
    align-items: center;
    justify-content: center;
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 12px;
    color: var(--gray-400);
    transition: transform 0.3s ease;
}

.faq-accordion .accordion-button:not(.collapsed)::after {
    transform: rotate(-180deg);
    color: var(--primary);
}

.faq-accordion .accordion-body {
    font-size: 14.5px;
    line-height: 1.85;
    color: var(--gray-600);
    padding: 18px 20px;
    background: var(--white);
}

.faq-accordion .accordion-body strong {
    color: var(--secondary);
}

.faq-accordion .accordion-body ul {
    padding-left: 20px;
    margin: 10px 0;
}

.faq-accordion .accordion-body li {
    margin-bottom: 6px;
}

.faq-accordion .accordion-body .highlight-box {
    background: var(--primary-bg);
    border-left: 3px solid var(--primary);
    padding: 12px 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-top: 12px;
    font-size: 14px;
}

.faq-q-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: var(--primary);
    color: white;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 800;
    flex-shrink: 0;
}

.faq-accordion .accordion-button:not(.collapsed) .faq-q-num {
    background: var(--primary);
}

/* ===== NO RESULT ===== */
.no-result-box {
    text-align: center;
    padding: 60px 20px;
    display: none;
}

.no-result-box i {
    font-size: 56px;
    color: var(--gray-300);
    margin-bottom: 16px;
    display: block;
}

.no-result-box h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-500);
}

.no-result-box p {
    color: var(--gray-400);
    font-size: 14px;
}

/* ===== STATS BANNER ===== */
.faq-stats-bar {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    border-radius: var(--radius-xl);
    padding: 28px 36px;
    margin-bottom: 48px;
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
}

.faq-stat-item {
    flex: 1;
    min-width: 140px;
    text-align: center;
    padding: 10px;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-stat-item:last-child {
    border-right: none;
}

.faq-stat-item .fsi-num {
    font-size: 32px;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}

.faq-stat-item .fsi-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.65);
    margin-top: 6px;
}

/* highlight matched search text */
mark {
    background: rgba(244, 118, 18, 0.2);
    color: var(--primary);
    padding: 0 2px;
    border-radius: 3px;
}

/* Back to top per section */
.back-to-search {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--primary);
    cursor: pointer;
    margin-top: 8px;
    margin-bottom: 4px;
}

@media print {

    .site-header,
    .site-footer,
    .faq-search-wrap,
    .faq-tabs,
    .faq-stats-bar,
    .scroll-top {
        display: none !important;
    }

    .accordion-collapse {
        display: block !important;
    }
}



/* --- Single Post / Article --- */
.article-breadcrumb-wrap {
    background: var(--gray-50);
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-200);
}

.article-breadcrumb {
    font-size: 14px;
}

.article-breadcrumb a {
    color: var(--primary);
}

.article-breadcrumb .active {
    color: var(--gray-500);
}

.article-section {
    padding: var(--section-py) 0;
}

.article-header {
    margin-bottom: 28px;
}

.article-category {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.article-title {
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.3;
    margin-bottom: 20px;
}

.article-meta-box {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    margin-bottom: 4px;
}

.article-author-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}

.article-author-icon {
    width: 42px;
    height: 42px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 18px;
    flex-shrink: 0;
}

.article-author-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
}

.article-author-name a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.article-author-name a:hover {
    color: var(--primary);
}

.article-date-views {
    margin-left: auto;
    display: flex;
    gap: 14px;
    font-size: 13px;
    color: var(--gray-400);
    flex-wrap: wrap;
}

.article-date-views i {
    color: var(--primary);
}

.article-featured-img {
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: 32px;
    box-shadow: var(--shadow-lg);
}

.article-featured-img img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.article-fallback-img {
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: 32px;
    height: 300px;
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 50%, #1e4d7a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.article-fallback-content {
    text-align: center;
    color: white;
}

.article-fallback-icon {
    font-size: 64px;
    color: rgba(244, 118, 18, 0.6);
    display: block;
    margin-bottom: 16px;
}

.article-fallback-title {
    font-size: 20px;
    font-weight: 700;
}

.article-author-bio {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    flex-wrap: wrap;
}

.article-bio-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 28px;
    flex-shrink: 0;
}

.article-bio-content {
    flex: 1;
}

.article-bio-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.article-bio-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 6px;
}

.article-bio-name a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.article-bio-name a:hover {
    color: var(--primary);
}

.article-bio-desc {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 12px;
    line-height: 1.6;
}

.article-bio-contact {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.article-bio-email {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
}

.sidebar-sticky {
    position: sticky;
    top: 90px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-quiz-cta {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
}

.sidebar-quiz-icon {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 14px;
    display: block;
}

.sidebar-quiz-title {
    color: white;
    font-weight: 700;
    margin-bottom: 8px;
}

.sidebar-quiz-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 20px;
}

.sidebar-quiz-btn {
    display: block;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    padding: 12px;
    font-size: 14px;
    font-weight: 700;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
}

.sidebar-quiz-btn:hover {
    background: var(--primary-dark);
}

.sidebar-widget {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.sidebar-widget-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 700;
    font-size: 15px;
    color: var(--secondary);
}

.sidebar-widget-header i {
    color: var(--primary);
    margin-right: 8px;
}

.sidebar-recent-posts {
    display: flex;
    flex-direction: column;
}

.sidebar-recent-item {
    display: flex;
    gap: 12px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition);
    text-decoration: none;
}

.sidebar-recent-item:hover {
    background: var(--primary-bg);
}

.sidebar-recent-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.sidebar-recent-content {}

.sidebar-recent-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.4;
    margin-bottom: 4px;
}

.sidebar-recent-date {
    font-size: 12px;
    color: var(--gray-400);
}

.sidebar-support {
    padding: 22px;
}

.sidebar-support-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}

.sidebar-support-desc {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 16px;
    line-height: 1.6;
}

.sidebar-support-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: white;
    padding: 10px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
    transition: var(--transition);
    text-decoration: none;
}

.sidebar-support-phone:hover {
    background: var(--primary-dark);
}

.sidebar-support-email {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--gray-100);
    color: var(--gray-700);
    padding: 10px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
}

.sidebar-support-email:hover {
    background: var(--gray-200);
}


/* --- Archive General --- */
.archive-hero-container {
    position: relative;
    z-index: 1;
}

.archive-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(244, 118, 18, 0.2);
    border: 1px solid rgba(244, 118, 18, 0.3);
    color: var(--primary-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}

.archive-breadcrumb-nav {
    margin-top: 12px;
    margin-bottom: 16px;
}

.archive-desc {
    color: rgba(255, 255, 255, 0.75);
    font-size: 16px;
    margin-top: 12px;
    margin-bottom: 0;
}

.archive-filter-bar {
    background: var(--white);
    padding: 20px 0;
    border-bottom: 1px solid var(--gray-200);
}

.archive-filter-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-600);
}

.archive-filter-btn {
    border-radius: 50px;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    text-decoration: none;
}

.archive-filter-btn-sm {
    padding: 6px 18px;
}

.archive-filter-btn.active {
    background: var(--primary);
    color: white;
    border: none;
}

.archive-filter-btn.inactive {
    background: var(--gray-100);
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
    font-weight: 500;
}

.archive-filter-btn.inactive:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.archive-filter-count {
    font-size: 14px;
    color: var(--gray-400);
}

.archive-filter-count strong {
    color: var(--secondary);
}

.archive-lesson-fallback {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a3a5c, #2a5080);
    display: flex;
    align-items: center;
    justify-content: center;
}

.archive-lesson-fallback-icon {
    font-size: 48px;
    color: rgba(255, 255, 255, 0.2);
}


/* --- Archive Quiz --- */
.archive-quiz-section {
    padding: var(--section-py) 0;
    background: var(--gray-50);
}

.quiz-info-banner {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    border-radius: var(--radius-lg);
    padding: 28px 36px;
    margin-bottom: 48px;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.quiz-info-icon-wrap {
    width: 56px;
    height: 56px;
    background: rgba(244, 118, 18, 0.2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.quiz-info-icon {
    font-size: 26px;
    color: var(--primary);
}

.quiz-info-content {
    flex: 1;
}

.quiz-info-title {
    color: white;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
}

.quiz-info-desc {
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
    margin: 0;
    line-height: 1.7;
}

.quiz-info-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.quiz-stat-item {
    text-align: center;
}

.quiz-stat-number {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
}

.quiz-stat-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* --- Pagination Common --- */
.pagination-wrapper ul {
    display: flex;
    list-style: none;
    gap: 8px;
    padding: 0;
    margin: 0;
}

.pagination-wrapper ul li span.current {
    background: var(--primary);
    color: white;
    border: 1px solid var(--primary);
    border-radius: 8px;
    padding: 8px 16px;
}

.pagination-wrapper ul li a {
    background: var(--white);
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    padding: 8px 16px;
    text-decoration: none;
}

.pagination-wrapper ul li a:hover {
    background: var(--gray-100);
}


/* --- Archive Blog --- */
.archive-blog-section {
    padding: var(--section-py) 0;
}

.blog-filter-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-200);
}

.blog-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
}

.blog-filter-btn.active {
    background: var(--primary);
    color: white;
    border: none;
}

.blog-filter-btn.inactive {
    background: var(--gray-100);
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
}

.blog-filter-btn.inactive:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.blog-featured-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    background: var(--white);
    text-decoration: none;
}

.blog-featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-featured-img-wrap {
    height: 280px;
    position: relative;
    background-size: cover;
    background-position: center;
}

.blog-featured-img-fallback {
    height: 280px;
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.blog-featured-fallback-icon {
    font-size: 80px;
    color: rgba(244, 118, 18, 0.2);
}

.blog-featured-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: var(--primary);
    color: white;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
}

.blog-featured-content {
    padding: 28px;
}

.blog-featured-tag {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 14px;
}

.blog-featured-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
    line-height: 1.5;
    transition: var(--transition);
}

.blog-featured-card:hover .blog-featured-title {
    color: var(--primary);
}

.blog-featured-excerpt {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 18px;
}

.blog-featured-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.blog-featured-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--gray-400);
}

.blog-featured-meta i {
    color: var(--primary);
}

.blog-featured-readmore {
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

.sidebar-recent-header {
    font-size: 16px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
}

.sidebar-recent-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.sidebar-recent-item-blog {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: var(--white);
    text-decoration: none;
}

.sidebar-recent-item-blog:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.sidebar-recent-icon-blog {
    width: 70px;
    height: 70px;
    border-radius: 10px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
}

.sidebar-recent-title-blog {
    font-size: 13px;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.4;
    margin-bottom: 5px;
}

.sidebar-recent-date-blog {
    font-size: 12px;
    color: var(--gray-400);
}

.blog-grid-divider {
    border-color: var(--gray-200);
    margin: 10px 0 20px;
}


/* --- 404 Page --- */
.not-found-section {
    padding: 120px 0;
    text-align: center;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.not-found-number {
    font-size: 120px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 20px;
    text-shadow: 0 10px 30px rgba(244, 118, 18, 0.3);
}

.not-found-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 20px;
}

.not-found-desc {
    color: var(--gray-500);
    font-size: 18px;
    max-width: 500px;
    margin: 0 auto 40px;
}

.not-found-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-orange);
}

.not-found-btn:hover {
    background: var(--primary-dark);
    color: white;
}


/* --- Footer Custom --- */
.site-footer-name {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 10px;
}

.footer-socials {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

.footer-social-btn {
    width: 36px;
    height: 36px;
    background: rgba(244, 118, 18, 0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
    text-decoration: none;
}

.footer-social-btn:hover {
    background: var(--primary);
    color: white;
}

.footer-social-btn i {
    font-size: 14px;
}

/* =======================
   CARD REVEAL ANIMATION
   (chuyển từ JS inject → CSS để cache được)
   ======================= */
.news-card,
.lesson-card,
.quiz-card,
.blog-card {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.news-card.revealed,
.lesson-card.revealed,
.quiz-card.revealed,
.blog-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.lesson-card:hover,
.news-card:hover,
.quiz-card:hover,
.blog-card:hover {
    opacity: 1;
}

/* Play button pulse animation */
.play-btn.pulse {
    animation: pulse-anim 1s infinite;
}

@keyframes pulse-anim {
    0% {
        box-shadow: 0 0 0 0 rgba(244, 118, 18, 0.5);
    }

    70% {
        box-shadow: 0 0 0 12px rgba(244, 118, 18, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(244, 118, 18, 0);
    }
}

/* Header scrolled state */
.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

/* Zalo icon (Font Awesome không có icon Zalo chính thức) */
.footer-social-zalo .zalo-icon {
    font-size: 15px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.5px;
}

/* Link tiêu đề trong quiz card */
.quiz-content h5 a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.quiz-content h5 a:hover {
    color: var(--primary);
}

/* --- Tối ưu FAQ Tabs trên Mobile --- */
@media (max-width: 767.98px) {
    .faq-tabs {
        flex-wrap: nowrap;
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 12px;
        margin-left: -15px;
        margin-right: -15px;
        padding-left: 15px;
        padding-right: 15px;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        /* Firefox */
    }

    .faq-tabs::-webkit-scrollbar {
        display: none;
        /* Chrome, Safari, Edge */
    }

    .faq-tab {
        flex: 0 0 auto;
        scroll-snap-align: start;
        white-space: nowrap;
    }
}


/* --- Custom Mobile Filter Styles --- */
.mobile-filter-toggle { background: #fff; border: 1px solid var(--primary); color: var(--primary); border-radius: 50px; padding: 12px 20px; font-weight: 600; text-align: left; }
.mobile-filter-toggle:hover, .mobile-filter-toggle:focus { background: var(--primary-bg); color: var(--primary-dark); }
.mobile-filter-toggle .filter-toggle-text { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-right: 15px; min-width: 0; }
.mobile-filter-toggle .fa-chevron-down { transition: transform 0.3s ease; }
.mobile-filter-toggle[aria-expanded="true"] .fa-chevron-down { transform: rotate(180deg); }

@media (max-width: 767.98px) {
    .archive-filter-menu { display: flex; flex-direction: column; gap: 6px !important; background: #fff; padding: 12px; border: 1px solid var(--gray-200); border-radius: 12px; box-shadow: var(--shadow-sm); margin-top: 10px; align-items: stretch !important; }
    .archive-filter-menu .archive-filter-btn { width: 100%; text-align: left; justify-content: flex-start; padding: 10px 16px; border-radius: 8px; white-space: normal; height: auto; display: block; line-height: 1.4; border: 1px solid transparent; }
    .archive-filter-menu .archive-filter-btn.inactive { background: var(--gray-50); color: var(--gray-700); }
    .archive-filter-menu .archive-filter-btn.inactive:hover { background: var(--primary-bg); color: var(--primary); }
    .archive-filter-menu .archive-filter-count { text-align: right; font-size: 13px; margin-top: 8px; color: var(--gray-500); }
}