/* ============================================================================
   Premium LMS UI Stylesheet (Kricate Theme Integration)
   ============================================================================ */

/* Design Tokens & Theme Variables */
:root {
    /* Font Family */
    --lms-font-sans: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;

    /* Branding Accent (KilatDev Electric Blue & Cyber Cyan) */
    --accent-gradient: linear-gradient(135deg, #0f52ba, #00f0ff);
    --accent-color: #0f52ba;
    --accent-hover: #0084ff;
    --star-color: #f59e0b;

    /* Light Mode Default Variables */
    --lms-bg: #f3f8fc;
    --lms-surface: #ffffff;
    --lms-surface-hover: #eaf3fc;
    --lms-border: rgba(15, 82, 186, 0.12);
    --lms-text: #0c2340;
    --lms-text-muted: #5b7086;
    --lms-shadow: 0 10px 30px -10px rgba(15, 82, 186, 0.08);
    --lms-glass-bg: rgba(255, 255, 255, 0.9);
    --lms-glass-border: rgba(15, 82, 186, 0.15);
}

/* Dark Mode Variables */
html.dark-mode,
body.dark-mode {
    --lms-bg: #090d16;
    --lms-surface: #111a2e;
    --lms-surface-hover: #1e293b;
    --lms-border: #1e293b;
    --lms-text: #f8fafc;
    --lms-text-muted: #94a3b8;
    --lms-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --lms-glass-bg: rgba(17, 26, 46, 0.85);
    --lms-glass-border: rgba(255, 255, 255, 0.08);
}

/* Global LMS Reset & Modernizations */
body {
    font-family: var(--lms-font-sans) !important;
}

body.dark-mode {
    background-color: var(--lms-bg) !important;
    color: var(--lms-text) !important;
}

body.dark-mode .wsus__course_video {
    background-color: var(--lms-bg) !important;
}

/* 1. Header Styling */
.wsus__course_header {
    background: var(--lms-glass-bg) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--lms-glass-border) !important;
    border-top: 3px solid var(--accent-color) !important;
    padding: 12px 30px !important;
    box-shadow: var(--lms-shadow);
    transition: all 0.3s ease;
}

.wsus__course_header a,
.wsus__course_header p {
    color: var(--lms-text) !important;
    font-family: var(--lms-font-sans);
}

.wsus__course_header a:hover {
    color: var(--accent-hover) !important;
}

/* 2. Course Sidebar Styling */
.wsus__course_sidebar {
    background: var(--lms-surface) !important;
    border-left: 1px solid var(--lms-border) !important;
    box-shadow: var(--lms-shadow);
}

.wsus__course_sidebar .video_heading {
    background: linear-gradient(180deg, #ffffff 0%, rgba(240, 247, 255, 0.7) 100%) !important;
    color: var(--lms-text) !important;
    border-bottom: 1px solid var(--lms-border) !important;
    font-family: var(--lms-font-sans);
    font-weight: 800;
    padding: 20px 24px !important;
    letter-spacing: 0.5px;
}

/* Modern Card Accordion style for Sidebar */
.wsus__course_sidebar .accordion-item {
    background-color: var(--lms-surface) !important;
    border: 1px solid var(--lms-border) !important;
    border-radius: 12px !important;
    margin: 12px 16px !important;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(15, 82, 186, 0.03);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.wsus__course_sidebar .accordion-item:hover {
    box-shadow: 0 8px 20px rgba(15, 82, 186, 0.08);
    border-color: rgba(15, 82, 186, 0.3) !important;
}

.wsus__course_sidebar .accordion-item button {
    background: #ffffff !important;
    color: var(--lms-text) !important;
    font-family: var(--lms-font-sans);
    font-weight: 700;
    padding: 16px 20px !important;
}

.wsus__course_sidebar .accordion-item button:not(.collapsed) {
    background: rgba(15, 82, 186, 0.05) !important;
    color: var(--accent-color) !important;
}

.wsus__course_sidebar .accordion-item button b {
    color: inherit !important;
    font-weight: 700;
}

.wsus__course_sidebar .accordion-item button span {
    color: var(--lms-text-muted) !important;
}

.wsus__course_sidebar .accordion-body {
    border-top: 1px solid var(--lms-border) !important;
    background: var(--lms-bg) !important;
    padding: 15px !important;
}

/* Sidebar checklist / lesson items */
.wsus__course_sidebar .form-check {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    margin-bottom: 8px !important;
    border-radius: 10px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.wsus__course_sidebar .form-check:hover {
    background: var(--lms-surface-hover) !important;
    border-color: var(--lms-border);
}

.wsus__course_sidebar .form-check.item-active {
    background: rgba(15, 82, 186, 0.08) !important;
    border-color: rgba(15, 82, 186, 0.2) !important;
    position: relative;
}

.wsus__course_sidebar .form-check.item-active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 15%;
    height: 70%;
    width: 4px;
    background: var(--accent-gradient);
    border-radius: 0 4px 4px 0;
    box-shadow: 0 0 8px rgba(15, 82, 186, 0.4);
}

.wsus__course_sidebar .form-check.item-active label {
    color: var(--accent-color) !important;
    font-weight: 700;
}

.wsus__course_sidebar .form-check label {
    color: var(--lms-text) !important;
    font-family: var(--lms-font-sans);
    font-size: 14px;
    width: 100%;
    cursor: pointer;
}

.wsus__course_sidebar .form-check label span {
    color: var(--lms-text-muted) !important;
    margin-top: 4px;
    font-size: 12px;
}

/* Custom Scrollbar for Sidebar Accordion */
.wsus__course_sidebar .accordion::-webkit-scrollbar {
    width: 6px;
    background: transparent;
}

.wsus__course_sidebar .accordion::-webkit-scrollbar-thumb {
    background: var(--lms-border);
    border-radius: 10px;
}

/* 3. Bottom Panel Styling (Tabs & Contents) */
.video_tabs_area {
    background: var(--lms-surface) !important;
    border-top: 1px solid var(--lms-border) !important;
    border-bottom: 1px solid var(--lms-border) !important;
    padding: 20px 30px 0 30px !important;
}

.video_tabs_area .nav-pills {
    border-bottom: 1px solid var(--lms-border) !important;
    gap: 12px;
    padding-bottom: 12px;
}

.video_tabs_area .nav-pills .nav-link {
    background: #f1f5f9 !important;
    color: var(--lms-text-muted) !important;
    font-family: var(--lms-font-sans);
    font-weight: 600;
    border-radius: 30px;
    padding: 10px 24px;
    transition: all 0.25s ease;
    border: 1px solid rgba(15, 82, 186, 0.08) !important;
}

.video_tabs_area .nav-pills .nav-link:hover {
    color: var(--accent-color) !important;
    background-color: var(--lms-surface-hover) !important;
}

.video_tabs_area .nav-pills .nav-link.active,
.video_tabs_area .nav-pills button.active,
.video_tabs_area ul li button.active {
    background: var(--accent-gradient) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 15px rgba(15, 82, 186, 0.35) !important;
    border-color: transparent !important;
}

.tab-content {
    background: var(--lms-surface) !important;
    min-height: 250px;
    font-family: var(--lms-font-sans);
    padding: 20px 30px !important;
}

.video_about h1,
.video_review h2,
.video_qna h3 {
    color: var(--lms-text) !important;
    font-family: var(--lms-font-sans);
    font-weight: 800;
}

.about-lecture,
.video_about,
.video_review,
.video_qna {
    color: var(--lms-text) !important;
}

/* Search Box and Buttons inside Bottom Panel */
.query-form {
    border: 1px solid var(--lms-border) !important;
    background: var(--lms-bg) !important;
    border-radius: 30px !important;
    overflow: hidden;
    display: flex;
}

.query-form input {
    background: transparent !important;
    color: var(--lms-text) !important;
    border: none !important;
    padding: 10px 20px !important;
    outline: none !important;
}

.query-form button {
    background: var(--accent-gradient) !important;
    color: #fff !important;
    border: none !important;
    padding: 0 20px !important;
    transition: all 0.2s ease;
}

.query-form button:hover {
    opacity: 0.9;
}

/* 4. Interactive Video Question Overlay */
.interactive-question-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.85);
    /* Back Drop filter blur background */
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.interactive-card {
    background: var(--lms-surface);
    border: 1px solid var(--lms-glass-border);
    border-radius: 16px;
    box-shadow: var(--lms-shadow);
    width: 100%;
    max-width: 550px;
    overflow: hidden;
    transform: scale(1);
    transition: transform 0.3s ease;
    animation: slideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.interactive-card-header {
    background: var(--accent-gradient);
    padding: 15px 20px;
    color: #ffffff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.interactive-badge {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
}

.interactive-card-body {
    padding: 25px;
}

.question-text {
    font-family: var(--lms-font-sans);
    font-weight: 700;
    font-size: 18px;
    line-height: 1.5;
    color: var(--lms-text);
    margin-bottom: 20px;
}

/* Modern Radio Inputs for Quiz choices */
.option-item {
    width: 100%;
}

.option-label {
    display: flex;
    align-items: center;
    padding: 12px 16px !important;
    border: 1px solid var(--lms-border) !important;
    border-radius: 10px !important;
    background: var(--lms-bg) !important;
    color: var(--lms-text) !important;
    transition: all 0.2s ease;
}

.option-label:hover {
    border-color: var(--accent-color) !important;
    background: var(--lms-surface-hover) !important;
}

.option-label input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
    margin-right: 12px;
}

.choice-letter {
    font-weight: 700;
    color: var(--accent-color);
}

.choice-text {
    font-size: 15px;
}

/* Submit Interactive button */
.btn-submit-interactive {
    background: var(--accent-gradient) !important;
    color: #ffffff !important;
    padding: 10px 24px !important;
    border-radius: 30px !important;
    font-family: var(--lms-font-sans);
    font-weight: 600;
    border: none !important;
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.2);
    transition: all 0.3s ease;
}

.btn-submit-interactive:hover {
    box-shadow: 0 6px 15px rgba(6, 182, 212, 0.35);
    transform: translateY(-1px);
}

.btn-submit-interactive:disabled {
    opacity: 0.6;
    transform: none;
    box-shadow: none;
}

/* Shake card animation for incorrect feedback */
.shake {
    animation: shakeCard 0.4s ease-in-out;
}

@keyframes shakeCard {

    0%,
    100% {
        transform: translateX(0);
    }

    20%,
    60% {
        transform: translateX(-8px);
    }

    40%,
    80% {
        transform: translateX(8px);
    }
}

.feedback-msg {
    font-family: var(--lms-font-sans);
    font-weight: 600;
    font-size: 15px;
}

/* 5. VideoJS Timeline Star Markers override */
.vjs-interactive-marker {
    transition: transform 0.2s ease;
}

.vjs-interactive-marker:hover {
    transform: scale(1.4);
}

.vjs-interactive-marker i {
    text-shadow: 0 0 4px rgba(0, 0, 0, 0.8);
}

/* 6. High Contrast and Clashing color overrides */
body.dark-mode .qna_list_area,
body.dark-mode .qna_details_area,
body.dark-mode .reply-holder,
body.dark-mode .video_review_imput {
    background: var(--lms-surface) !important;
    color: var(--lms-text) !important;
}

/* Fix tinymce image upload editor elements in dark mode */
body.dark-mode .tox-tinymce {
    border: 1px solid var(--lms-border) !important;
    background: var(--lms-surface) !important;
}

/* Fix modal contents in dark mode */
body.dark-mode .modal-content {
    background: var(--lms-surface) !important;
    border: 1px solid var(--lms-border) !important;
    color: var(--lms-text) !important;
}

body.dark-mode .modal-header {
    border-bottom: 1px solid var(--lms-border) !important;
}

body.dark-mode .modal-header h5 {
    color: var(--lms-text) !important;
}

body.dark-mode .modal-body label {
    color: var(--lms-text) !important;
}

body.dark-mode .modal-body input,
body.dark-mode .modal-body textarea,
body.dark-mode .modal-body select {
    background-color: var(--lms-bg) !important;
    border: 1px solid var(--lms-border) !important;
    color: var(--lms-text) !important;
}

body.dark-mode .btn-close {
    filter: invert(1);
}

/* Modern Video Player Placeholder */
.player-placeholder {
    background: #000 !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Resource files view card */
.resource-file {
    background: var(--lms-bg) !important;
    border: 1px solid var(--lms-border) !important;
    border-radius: 12px;
}

.resource-file h6,
.resource-file p {
    color: var(--lms-text) !important;
    font-family: var(--lms-font-sans);
}

/* ============================================================================
   Premium Modern Navigation Styles
   ============================================================================ */

.tgmenu__navbar-wrap .navigation {
    display: flex !important;
    flex-wrap: nowrap !important;
    align-items: center !important;
    gap: 4px !important;
    margin: 0 !important;
    padding: 0 !important;
    list-style: none !important;
}

.tgmenu__navbar-wrap .navigation>li {
    position: relative !important;
}

.tgmenu__navbar-wrap .navigation>li>a {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    padding: 8px 10px !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    color: var(--lms-text) !important;
    font-family: var(--lms-font-sans) !important;
    border-radius: 8px !important;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    position: relative !important;
}

/* Underline slide effect on hover */
.tgmenu__navbar-wrap .navigation>li>a::after {
    content: '' !important;
    position: absolute !important;
    bottom: 0px !important;
    left: 10px !important;
    right: 10px !important;
    height: 3px !important;
    background: var(--accent-gradient, linear-gradient(135deg, #10b981, #06b6d4)) !important;
    border-radius: 2px !important;
    transform: scaleX(0) !important;
    transform-origin: right !important;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.tgmenu__navbar-wrap .navigation>li:hover>a {
    color: var(--accent-color, #06b6d4) !important;
    background: var(--lms-surface-hover, rgba(0, 0, 0, 0.03)) !important;
}

.tgmenu__navbar-wrap .navigation>li:hover>a::after,
.tgmenu__navbar-wrap .navigation>li.active>a::after {
    transform: scaleX(1) !important;
    transform-origin: left !important;
}

/* Submenu Dropdown Container */
.tgmenu__navbar-wrap .navigation li .sub-menu {
    position: absolute !important;
    top: 100% !important;
    left: 0 !important;
    width: 230px !important;
    background: var(--lms-glass-bg, rgba(255, 255, 255, 0.95)) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    border: 1px solid var(--lms-glass-border, rgba(0, 0, 0, 0.08)) !important;
    border-radius: 12px !important;
    padding: 8px !important;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transform: translateY(10px) scale(0.95) !important;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    display: block !important;
    z-index: 999 !important;
}

.tgmenu__navbar-wrap .navigation li:hover>.sub-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(6px) scale(1) !important;
}

.tgmenu__navbar-wrap .navigation li .sub-menu li {
    list-style: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

.tgmenu__navbar-wrap .navigation li .sub-menu li a {
    display: block !important;
    padding: 8px 12px !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    color: var(--lms-text) !important;
    border-radius: 6px !important;
    transition: all 0.2s ease !important;
    background: transparent !important;
}

.tgmenu__navbar-wrap .navigation li .sub-menu li a:hover {
    background-color: var(--lms-surface-hover, rgba(0, 0, 0, 0.03)) !important;
    color: var(--accent-color, #06b6d4) !important;
    padding-left: 16px !important;
}

/* Arrow rotation on dropdown hover */
.tgmenu__navbar-wrap .navigation li a svg {
    transition: transform 0.25s ease !important;
    margin-left: 4px !important;
}

.tgmenu__navbar-wrap .navigation li:hover>a svg {
    transform: rotate(180deg) !important;
    color: var(--accent-color, #06b6d4) !important;
}

/* Dark mode overrides */
body.dark-mode .tgmenu__navbar-wrap .navigation li .sub-menu {
    background: rgba(17, 26, 46, 0.92) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2) !important;
}

body.dark-mode .tgmenu__navbar-wrap .navigation>li:hover>a {
    background: rgba(255, 255, 255, 0.05) !important;
}

body.dark-mode .tgmenu__navbar-wrap .navigation li .sub-menu li a:hover {
    background-color: rgba(255, 255, 255, 0.05) !important;
}

/* Footer bottom powered by styling */
.copy-right-text {
    display: flex !important;
    align-items: center !important;
    flex-wrap: wrap !important;
    gap: 12px !important;
}

.copy-right-text p {
    margin-bottom: 0 !important;
}

.powered-by-box {
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    font-size: 14px !important;
    opacity: 0.8;
}

.powered-by-box a {
    display: inline-flex !important;
    align-items: center !important;
    gap: 4px !important;
    font-weight: 700 !important;
    text-decoration: none !important;
    color: var(--accent-color, #06b6d4) !important;
    transition: color 0.2s ease !important;
}

.powered-by-box a:hover {
    color: var(--accent-hover, #0891b2) !important;
}

.powered-by-logo {
    height: 65px !important;
    width: 65px !important;
    object-fit: contain !important;
    border-radius: 10px !important;
    display: inline-block !important;
    vertical-align: middle !important;
    border: 1px solid rgba(255, 255, 255, 0.15) !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

/* ============================================================================
   Navbar Inline Flex & Wrap Override
   ============================================================================ */

.tgmenu__nav {
    display: flex !important;
    flex-wrap: nowrap !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
}

.tgmenu__navbar-wrap {
    flex-shrink: 1 !important;
}

.tgmenu__search {
    flex-shrink: 1 !important;
    max-width: 320px !important;
    min-width: 180px !important;
}

.tgmenu__search-form {
    display: flex !important;
    width: 100% !important;
}

.tgmenu__action {
    flex-shrink: 0 !important;
    display: flex !important;
    align-items: center !important;
}

/* Responsive adjustment to menu link paddings and search width */
@media (max-width: 1399px) {
    .tgmenu__navbar-wrap .navigation>li>a {
        padding: 8px 10px !important;
        font-size: 14px !important;
    }

    .tgmenu__search {
        max-width: 240px !important;
    }
}

@media (max-width: 1199px) {
    .tgmenu__navbar-wrap .navigation>li>a {
        padding: 6px 8px !important;
        font-size: 13px !important;
    }
}

/* ============================================================================
   Premium Student learning player UI enhancements
   ============================================================================ */

/* Redesigned Glassmorphic Header */
.wsus__course_header {
    background: var(--lms-glass-bg) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--lms-glass-border) !important;
    padding: 12px 30px !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--lms-shadow);
}

.btn-back-dashboard {
    font-family: var(--lms-font-sans);
    font-weight: 700;
    font-size: 13px;
    color: var(--lms-text) !important;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 30px;
    border: 1px solid var(--lms-border);
    background: var(--lms-surface);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-back-dashboard:hover {
    color: #ffffff !important;
    background: var(--accent-gradient);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
    transform: translateX(-3px);
}

/* Sleek Progress Bar in Header */
.header-progress-container {
    display: flex;
    flex-direction: column;
    width: 280px;
    gap: 3px;
    font-family: var(--lms-font-sans);
}

.progress-info-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--lms-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.progress-percentage {
    font-size: 12px;
    font-weight: 800;
    color: var(--accent-color);
}

.custom-progress-bar-bg {
    width: 100%;
    height: 5px;
    background: var(--lms-surface-hover);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--lms-border);
}

.custom-progress-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 10px;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-details {
    font-size: 10px;
    font-weight: 600;
    color: var(--lms-text-muted);
    text-align: right;
}

/* Custom premium circular checkboxes */
.wsus__course_sidebar .form-check {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    margin-bottom: 8px !important;
    border-radius: 10px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.wsus__course_sidebar .form-check-input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--lms-border);
    background-color: var(--lms-bg);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    appearance: none;
    -webkit-appearance: none;
    outline: none;
    margin-top: 0;
    flex-shrink: 0;
}

.wsus__course_sidebar .form-check-input[type="checkbox"]:checked {
    background: var(--accent-gradient);
    border-color: transparent;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

.wsus__course_sidebar .form-check-input[type="checkbox"]:checked::after {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: #ffffff;
    font-size: 10px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Active sidebar item glow and side border */
.wsus__course_sidebar .form-check.item-active {
    background: rgba(6, 182, 212, 0.08) !important;
    border-color: rgba(6, 182, 212, 0.2) !important;
    position: relative;
}

.wsus__course_sidebar .form-check.item-active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 15%;
    height: 70%;
    width: 4px;
    background: var(--accent-gradient);
    border-radius: 0 4px 4px 0;
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.6);
}

/* Sidebar Header & Accordion refinements */
.wsus__course_sidebar .video_heading {
    padding: 20px 24px !important;
    font-size: 16px !important;
    letter-spacing: 0.5px;
}

.wsus__course_sidebar .accordion-button {
    font-size: 14px !important;
    padding: 16px 20px !important;
}

/* Selection / Double click AI popups */
.ai-selection-btn {
    position: absolute;
    background: linear-gradient(135deg, #10b981, #06b6d4);
    color: #ffffff;
    border: none;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 20px;
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
    z-index: 99999;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--lms-font-sans);
    animation: fadeInScale 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.ai-selection-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.6);
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(5px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* High Contrast PDF/Docx view adjustments */
.docx-preview-container-style,
.docx-preview-container-style * {
    background-color: #ffffff !important;
    color: #0f172a !important;
}

/* Styling overlays inside student view */
body.dark-mode .qna_list_area,
body.dark-mode .qna_details_area,
body.dark-mode .reply-holder,
body.dark-mode .video_review_imput {
    background: var(--lms-surface) !important;
    border-radius: 12px;
    border: 1px solid var(--lms-border);
}