/* ============================================
   E-Learning Platform - Custom Styles
   OTAVN Brand Colors:
   Primary (Red):    #FF0000
   Secondary (Blue): #00A0FD
   Accent (Orange):  #FF914D
   ============================================ */

/* Multi-level dropdown (3 cấp menu) */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu > .dropdown-menu {
    top: -0.375rem;
    left: 100%;
    margin-top: 0;
    display: none;
    min-width: 220px;
    border-radius: 0.375rem;
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,.15);
}

/* Show submenu via .show class (JS) or :hover (desktop) */
.dropdown-submenu > .dropdown-menu.show {
    display: block;
}

.dropdown-submenu > .dropdown-item.dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.dropdown-submenu > .dropdown-item.dropdown-toggle::after {
    margin-left: 0.5em;
    border-left: 0.3em solid;
    border-top: 0.3em solid transparent;
    border-bottom: 0.3em solid transparent;
    border-right: 0;
    flex-shrink: 0;
}

.dropdown-menu .dropdown-item {
    padding-left: 1rem;
    padding-right: 1rem;
}

.dropdown-submenu > .dropdown-item:hover {
    background-color: #f0f4f8;
}

/* Desktop: hover to open */
@media (min-width: 992px) {
    .dropdown-submenu:hover > .dropdown-menu {
        display: block;
        animation: submenuFadeIn 0.2s ease;
    }
    @keyframes submenuFadeIn {
        from { opacity: 0; transform: translateX(-5px); }
        to { opacity: 1; transform: translateX(0); }
    }
}

/* Mobile: sub-dropdown stacks below */
@media (max-width: 991.98px) {
    .dropdown-submenu > .dropdown-menu {
        position: static !important;
        left: 0;
        margin-left: 1rem;
        box-shadow: none;
        border: none;
        background: #f8f9fa;
    }
    .dropdown-submenu > .dropdown-menu.show {
        display: block;
    }
    .dropdown-submenu > .dropdown-item.dropdown-toggle::after {
        transform: rotate(90deg);
    }
}

/* Mobile navbar: utility bar (lang/bell/account) on one line */
@media (max-width: 991.98px) {
    .navbar-collapse .navbar-nav.flex-row {
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        justify-content: center;
        border-top: 1px solid #e9ecef;
        padding-top: 0.5rem;
    }
    .navbar-collapse .d-flex.me-3 {
        margin-right: 0 !important;
        width: 100%;
        margin-bottom: 0.5rem;
    }
}

:root {
    --otavn-primary: #FF0000;
    --otavn-secondary: #00A0FD;
    --otavn-accent: #FF914D;
    --otavn-primary-dark: #CC0000;
    --otavn-secondary-dark: #0080D0;
    --otavn-accent-dark: #E07830;
    --primary: #FF0000;
    --primary-dark: #CC0000;
    --primary-light: #ff6666;
    --secondary: #FF914D;
    --secondary-dark: #E07830;
    --secondary-light: #ffb380;
    --dark: #2c3e50;
    --gray: #7f8c8d;
    --light-bg: #f8f9fa;
}

/* General */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #333;
}

/* Links */
a {
    color: var(--otavn-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--otavn-secondary-dark);
}

/* Override Bootstrap primary */
.btn-primary {
    background-color: var(--otavn-secondary) !important;
    border-color: var(--otavn-secondary) !important;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--otavn-secondary-dark) !important;
    border-color: var(--otavn-secondary-dark) !important;
}

.btn-outline-primary {
    color: var(--otavn-secondary);
    border-color: var(--otavn-secondary);
}

.btn-outline-primary:hover {
    background-color: var(--otavn-secondary);
    border-color: var(--otavn-secondary);
    color: #fff;
}

.btn-secondary {
    background-color: var(--otavn-accent);
    border-color: var(--otavn-accent);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--otavn-accent-dark);
    border-color: var(--otavn-accent-dark);
}

.btn-danger, .btn-otavn {
    background-color: var(--otavn-primary) !important;
    border-color: var(--otavn-primary) !important;
}
.btn-danger:hover, .btn-otavn:hover {
    background-color: var(--otavn-primary-dark) !important;
    border-color: var(--otavn-primary-dark) !important;
}

/* Navbar brand */
.navbar-brand, .text-primary {
    color: var(--otavn-primary) !important;
}

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

/* Navbar */
.navbar-brand {
    font-size: 1.4rem;
}

.navbar .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: color 0.2s ease;
}

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

/* Nav tabs active */
.nav-tabs .nav-link.active {
    color: var(--otavn-primary) !important;
    border-bottom-color: var(--otavn-primary) !important;
}

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

/* Badge colors */
.badge-otavn { background-color: var(--otavn-accent); color: white; }

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--otavn-primary) 0%, var(--otavn-accent) 100%) !important;
    color: #fff;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(180deg, transparent, rgba(255,255,255,0.1));
}

.hero-section h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-section p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.hero-section .form-control {
    border-radius: 50px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.hero-section .btn {
    border-radius: 50px;
    padding: 0.75rem 2rem;
}

/* Course Cards */
.course-card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    border-color: var(--otavn-accent);
}

.course-card .card-img-top {
    height: 200px;
    object-fit: cover;
}

.course-card .card-body {
    padding: 1.25rem;
}

.course-card .card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card .card-text {
    font-size: 0.875rem;
    color: var(--gray);
}

.course-card .course-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--gray);
    margin-bottom: 0.75rem;
}

.course-card .course-meta i {
    margin-right: 0.25rem;
}

.course-card .course-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--otavn-primary);
}

.course-card .course-price .original-price {
    font-size: 0.85rem;
    color: var(--gray);
    text-decoration: line-through;
    font-weight: 400;
    margin-left: 0.5rem;
}

.course-card .badge-free {
    background-color: #27ae60;
    color: #fff;
    font-size: 0.85rem;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
}

/* Video Language Badges */
.video-lang-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid;
}

.video-lang-badge.lang-vi {
    background-color: #fff5f5;
    border-color: var(--otavn-primary);
    color: var(--otavn-primary);
}

.video-lang-badge.lang-en {
    background-color: #f0f4ff;
    border-color: var(--otavn-secondary);
    color: var(--otavn-secondary);
}

.video-lang-badge.lang-jp {
    background-color: #fff5f5;
    border-color: var(--otavn-primary);
    color: var(--otavn-primary-dark);
}

.video-lang-badge.lang-kr {
    background-color: #f0f4ff;
    border-color: var(--otavn-secondary-dark);
    color: var(--otavn-secondary-dark);
}

.video-lang-badge.lang-coming-soon {
    background-color: #f9f9f9;
    border-color: #bdc3c7;
    color: #7f8c8d;
    font-style: italic;
}

/* Category grid: 5 per row on desktop */
@media (min-width: 992px) {
    .col-cat {
        flex: 0 0 20%;
        max-width: 20%;
    }
}

/* Category Cards */
.category-card {
    border: none;
    border-radius: 12px;
    padding: 2rem 1.5rem;
    text-align: center;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    border-color: var(--otavn-primary);
}

.category-card .icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--otavn-accent), var(--otavn-primary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.category-card h6 {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.category-card .course-count {
    font-size: 0.85rem;
    color: var(--gray);
}

/* Section Headings */
.section-heading {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.section-subheading {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

/* Stats Section */
.stat-card {
    text-align: center;
    padding: 2rem;
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--otavn-primary);
}

.stat-card .stat-label {
    font-size: 0.95rem;
    color: var(--gray);
    margin-top: 0.5rem;
}

/* Footer - use high-specificity selectors to beat Bootstrap */
footer.footer-section,
footer.footer-section *,
footer.footer-section p,
footer.footer-section li,
footer.footer-section small,
footer.footer-section span,
footer.footer-section div,
footer.footer-section ul {
    color: #e2e8f0 !important;
}

footer.footer-section {
    background-color: #111827 !important;
}

footer.footer-section h5,
footer.footer-section h6 {
    color: #fff !important;
}

footer.footer-section strong {
    color: #f1f5f9 !important;
}

footer.footer-section a.footer-link {
    color: #e2e8f0 !important;
    text-decoration: none !important;
}

footer.footer-section a.footer-link:hover {
    color: #fff !important;
    text-decoration: underline !important;
}

footer.footer-section a.footer-link-red {
    color: #fca5a5 !important;
    text-decoration: none !important;
}

footer.footer-section a.footer-link-red:hover {
    color: #fecaca !important;
}

footer.footer-section a.social-link,
footer.footer-section a.social-link i {
    color: #94a3b8 !important;
}

footer.footer-section a.social-link:hover,
footer.footer-section a.social-link:hover i {
    color: #fff !important;
}

footer.footer-section hr {
    border-color: rgba(255,255,255,0.15) !important;
}

footer.footer-section .footer-copyright {
    color: #94a3b8 !important;
}

/* Sidebar active (frontend) */
.filter-sidebar .list-group-item.active {
    background-color: var(--otavn-secondary);
    border-color: var(--otavn-secondary);
}

/* Enroll button */
.btn-enroll {
    background: linear-gradient(135deg, var(--otavn-primary) 0%, var(--otavn-accent) 100%);
    border: none;
    color: white;
    font-weight: 600;
}
.btn-enroll:hover {
    background: linear-gradient(135deg, var(--otavn-primary-dark) 0%, var(--otavn-accent-dark) 100%);
    color: white;
}

/* Progress Bar */
.progress-bar {
    background-color: var(--otavn-primary);
}

/* Pagination */
.page-link {
    color: var(--otavn-secondary);
}

.page-item.active .page-link {
    background-color: var(--otavn-secondary);
    border-color: var(--otavn-secondary);
}

/* Utilities */
.rounded-lg {
    border-radius: 12px !important;
}

.shadow-hover {
    transition: box-shadow 0.3s ease;
}

.shadow-hover:hover {
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .course-card .card-img-top {
        height: 160px;
    }
}

@media (max-width: 576px) {
    .hero-section h1 {
        font-size: 1.6rem;
    }

    .hero-section p {
        font-size: 1rem;
    }
}

/* ============================================
   Course Listing Page
   ============================================ */

/* Filter Sidebar */
.filter-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.filter-card .card-body {
    padding: 1rem;
}

.filter-heading {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--dark);
    margin-bottom: 0.75rem;
    letter-spacing: 0.3px;
}

.filter-list li {
    margin-bottom: 0;
}

.filter-link {
    display: block;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    color: #555;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.filter-link:hover {
    background-color: #f0f7ff;
    color: var(--otavn-secondary);
}

.filter-link.active {
    background-color: var(--otavn-secondary);
    color: #fff;
    font-weight: 500;
}

.filter-link.active:hover {
    background-color: var(--otavn-secondary-dark);
    color: #fff;
}

/* Course Card Enhancements for listing */
.course-card .card-footer {
    padding: 0.75rem 1.25rem;
}

.course-card .card-img-top {
    transition: transform 0.3s ease;
}

.course-card:hover .card-img-top {
    transform: scale(1.03);
}

.course-card a.text-dark:hover {
    color: var(--otavn-secondary) !important;
}

/* ============================================
   Course Detail Page
   ============================================ */

/* Course Title */
.course-detail-title {
    font-size: 1.85rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    line-height: 1.3;
}

/* Course Tabs */
.course-tabs .nav-link {
    color: #555;
    font-weight: 500;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.75rem 1.25rem;
    transition: all 0.2s ease;
}

.course-tabs .nav-link:hover {
    color: var(--otavn-primary);
    border-bottom-color: var(--primary-light);
    background: none;
}

.course-tabs .nav-link.active {
    color: var(--otavn-primary);
    border-bottom-color: var(--otavn-primary);
    background: none;
    font-weight: 600;
}

/* Video Container */
.video-container {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.video-container .ratio iframe {
    border-radius: 10px;
}

/* Video Language Badges - active state */
.video-lang-badge {
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
}

.video-lang-badge.active {
    box-shadow: 0 0 0 2px currentColor;
    font-weight: 600;
}

.video-lang-badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.video-language-badges {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0;
}

/* Course Description */
.course-description {
    line-height: 1.8;
    color: #444;
    text-align: justify;
}

.tab-pane {
    text-align: justify;
}

.tab-pane h1, .tab-pane h2, .tab-pane h3, .tab-pane h4, .tab-pane h5, .tab-pane h6 {
    text-align: left;
}

.course-description h2,
.course-description h3,
.course-description h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--dark);
}

.course-description img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
}

.course-description ul,
.course-description ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.course-description li {
    margin-bottom: 0.5rem;
}

/* Curriculum Accordion */
.curriculum-accordion .accordion-item {
    border: 1px solid #e9ecef;
    margin-bottom: 0.5rem;
    border-radius: 8px !important;
    overflow: hidden;
}

.curriculum-accordion .accordion-button {
    font-weight: 600;
    font-size: 0.95rem;
    background-color: #f8f9fa;
    color: var(--dark);
    padding: 1rem 1.25rem;
}

.curriculum-accordion .accordion-button:not(.collapsed) {
    background-color: #fff0f0;
    color: var(--otavn-primary);
    box-shadow: none;
}

.curriculum-accordion .accordion-button:focus {
    box-shadow: none;
    border-color: transparent;
}

.curriculum-accordion .accordion-button .badge {
    font-weight: 400;
    font-size: 0.75rem;
}

.curriculum-accordion .list-group-item {
    border-left: none;
    border-right: none;
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
    transition: background-color 0.15s ease;
}

.curriculum-accordion .list-group-item:hover {
    background-color: #fafafa;
}

.curriculum-accordion .list-group-item:first-child {
    border-top: none;
}

/* Course Sidebar Card */
.course-sidebar-card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
}

.course-sidebar-card .card-img-top {
    height: 220px;
    object-fit: cover;
}

.course-sidebar-card .card-body {
    padding: 1.5rem;
}

.course-info-list li {
    font-size: 0.9rem;
}

.course-info-list li i {
    width: 20px;
    text-align: center;
}

/* Mobile Bottom Bar */
.course-mobile-bar {
    border-top: 1px solid #eee;
    z-index: 1040;
    padding: 0;
}

/* Add padding at bottom on mobile so content isn't hidden behind bar */
@media (max-width: 991.98px) {
    .course-mobile-bar ~ main,
    body {
        padding-bottom: 80px;
    }
}

/* FAQ Accordion */
#faqAccordion .accordion-item {
    border: 1px solid #e9ecef;
    margin-bottom: 0.5rem;
    border-radius: 8px !important;
    overflow: hidden;
}

#faqAccordion .accordion-button {
    font-weight: 500;
    font-size: 0.95rem;
}

#faqAccordion .accordion-button:not(.collapsed) {
    background-color: #fff0f0;
    color: var(--otavn-primary);
    box-shadow: none;
}

#faqAccordion .accordion-button:focus {
    box-shadow: none;
}

#faqAccordion .accordion-body {
    line-height: 1.7;
    color: #555;
}

/* Course listing responsive */
@media (max-width: 991.98px) {
    .course-detail-title {
        font-size: 1.5rem;
    }

    .course-sidebar-card .card-img-top {
        height: 180px;
    }

    .course-tabs .nav-link {
        padding: 0.6rem 0.75rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 575.98px) {
    .course-detail-title {
        font-size: 1.3rem;
    }

    .video-language-badges {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ============================================
   Homepage - Steps, Features, OTA Channels
   ============================================ */

/* Step Cards */
.step-card {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
    border: 1px solid #eef2f7;
}
.step-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}
.step-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--otavn-accent), var(--otavn-primary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin: 0 auto 0.75rem;
}
@media (max-width: 575.98px) {
    .step-card {
        padding: 1rem 0.75rem;
    }
    .step-card h6 {
        font-size: 0.85rem;
    }
    .step-card p {
        font-size: 0.75rem !important;
    }
    .step-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Risk-Free Box */
.risk-free-box {
    border: 2px solid #4CAF50;
    background-color: #f9fff9;
}
.risk-free-box ul, .risk-free-box ol {
    padding-left: 1.25rem;
}
.risk-free-box li {
    margin-bottom: 0.4rem;
}

/* Feature Box */
.feature-box {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

/* OTA Channel Badges */
.ota-channel-badge {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.ota-channel-badge:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* YouTube Thumbnail Links */
.yt-thumb-link {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.yt-thumb-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}
.yt-thumb-link img {
    aspect-ratio: 16/9;
    object-fit: cover;
}
.yt-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    color: #FF0000;
    opacity: 0.85;
    transition: opacity 0.2s ease, transform 0.2s ease;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}
.yt-thumb-link:hover .yt-play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

/* Reason Cards */
.reason-card {
    transition: transform 0.2s ease;
}
.reason-card:hover {
    transform: translateY(-2px);
}

/* ============================================
   HOME PAGE - Steps Section
   ============================================ */
.step-card {
    padding: 20px 15px;
    transition: transform 0.2s ease;
}
.step-card:hover {
    transform: translateY(-3px);
}
.step-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--otavn-primary), #1565c0);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin: 0 auto 12px;
    box-shadow: 0 4px 15px rgba(21,101,192,0.3);
}
.step-card h6 {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 5px;
}
.step-card p {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0;
}
.step-number {
    display: inline-block;
    width: 28px;
    height: 28px;
    line-height: 28px;
    border-radius: 50%;
    background: var(--otavn-primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

/* ============================================
   HOME PAGE - Feature Cards (Đặc điểm nổi bật)
   ============================================ */
.feature-highlight-card {
    background: #fff;
    border-radius: 12px;
    padding: 25px 20px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: 100%;
}
.feature-highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}
.feature-highlight-card .icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 15px;
}
.feature-highlight-card h5 {
    font-size: 1rem;
    font-weight: 700;
}
.feature-highlight-card p {
    font-size: 0.85rem;
    color: #666;
}

/* ============================================
   HOME PAGE - OTA Channel Badges
   ============================================ */
.ota-channel-badge {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ota-channel-badge:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12) !important;
}
.ota-channel-badge i {
    font-size: 2rem;
    margin-bottom: 8px;
}
.ota-channel-badge h6 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0;
}

/* ============================================
   HOME PAGE - Learning Methods
   ============================================ */
.learning-method-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    transition: transform 0.2s ease;
    height: 100%;
}
.learning-method-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0,0,0,0.1);
}
.learning-method-card .method-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}
.learning-method-card h5 {
    font-weight: 700;
    font-size: 1.05rem;
}
.learning-method-card p {
    font-size: 0.85rem;
    color: #666;
}

/* ============================================
   HOME PAGE - Video Thumbnails (YouTube)
   ============================================ */
.video-thumb-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    transition: transform 0.2s ease;
}
.video-thumb-card:hover {
    transform: translateY(-3px);
}
.video-thumb-card img {
    width: 100%;
    height: auto;
    display: block;
}
.video-thumb-card .play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255,0,0,0.85);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    transition: background 0.2s ease, transform 0.2s ease;
}
.video-thumb-card:hover .play-btn {
    background: rgba(255,0,0,1);
    transform: translate(-50%, -50%) scale(1.1);
}

/* ============================================
   HOME PAGE - CTA Section
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    border-radius: 12px;
    padding: 40px;
    color: #fff;
}
.cta-section h3 {
    font-weight: 800;
}
.cta-section p {
    opacity: 0.9;
}

/* ============================================
   Course Detail - text justify
   ============================================ */
.course-description,
.course-extra-section,
.tab-pane p,
.tab-pane .course-description {
    text-align: justify;
}

/* ============================================
   HOME - Responsive fixes
   ============================================ */
@media (max-width: 768px) {
    .step-icon {
        width: 48px;
        height: 48px;
        font-size: 1.1rem;
    }
    .step-card h6 {
        font-size: 0.8rem;
    }
    .cta-section {
        padding: 25px 20px;
    }
    .feature-highlight-card {
        padding: 20px 15px;
    }
}