/* ==========================================================================
   MCU APPS V2 — APPLE / STRIPE / LINEAR DESIGN SYSTEM
   Tone: Minimal, Clean, Elegant, Premium, Professional, Trustworthy, Modern
   Palette: Background #F8FAFC | Primary #2563EB | Text #0F172A | Border #E5E7EB
   ========================================================================== */

:root {
    --mcu-bg: #F8FAFC;
    --mcu-surface: #FFFFFF;
    --mcu-primary: #2563EB;
    --mcu-primary-hover: #1D4ED8;
    --mcu-secondary: #3B82F6;
    --mcu-text-dark: #0F172A;
    --mcu-text-muted: #64748B;
    --mcu-border: #E5E7EB;
    --mcu-border-hover: #CBD5E1;
    --mcu-radius-card: 20px;
    --mcu-radius-btn: 12px;
    --mcu-shadow-sm: 0 2px 4px 0 rgba(15, 23, 42, 0.04);
    --mcu-shadow-md: 0 6px 16px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -2px rgba(15, 23, 42, 0.04);
    --mcu-shadow-lg: 0 20px 40px -4px rgba(15, 23, 42, 0.09), 0 8px 16px -4px rgba(15, 23, 42, 0.05);
}

html,
body,
*,
::after,
::before,
button,
input,
select,
textarea,
h1,
h2,
h3,
h4,
h5,
h6,
p,
div,
span,
a,
label,
li,
ul,
ol,
th,
td,
table,
section,
article,
header,
footer,
main,
nav,
aside,
blockquote,
figcaption,
figure,
.nav-link,
.btn,
.form-control,
.form-select,
.mcu-reading-paper-content * {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
}

html {
    scroll-behavior: smooth !important;
}

body,
body.mcu-v2-theme {
    background: radial-gradient(circle at 12% 15%, rgba(37, 99, 235, 0.045) 0%, transparent 45%), radial-gradient(circle at 88% 85%, rgba(236, 72, 153, 0.045) 0%, transparent 45%), #F8FAFC !important;
    color: var(--mcu-text-dark) !important;
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
}

/* Glassmorphism Header Navbar */
header.sticky-top {
    background: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: blur(16px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(16px) saturate(180%) !important;
    border-bottom: 1px solid rgba(229, 231, 235, 0.7) !important;
}

html.mcu-modal-open,
body.mcu-modal-open,
html:has(#btn-auth:not(:checked)),
body:has(#btn-auth:not(:checked)) {
    overflow: hidden !important;
    height: 100% !important;
    max-height: 100vh !important;
    touch-action: none !important;
    overscroll-behavior: none !important;
}

/* Keyframe Animations & Micro-Interactions */
@keyframes modalScaleIn {
    0% {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }

    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes mcuPulseGlow {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(37, 99, 235, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
    }
}

@keyframes mcuFloat {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-6px);
    }

    100% {
        transform: translateY(0px);
    }
}

@keyframes mcuFadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

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

.mcu-fade-in-up {
    animation: mcuFadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.mcu-pulse-badge {
    animation: mcuPulseGlow 2.5s infinite;
}

.mcu-float-elem {
    animation: mcuFloat 4s ease-in-out infinite;
}

/* ============================================
   POST-LOGIN PORTAL DESIGN ENHANCEMENTS
   Card Hover, Search Glow, Hero Variations,
   Page Transitions, Thumbnail Aspect Ratio
   ============================================ */

/* Card Hover Micro-Interactions (Dashboard & General) */
.mcu-dashboard-card {
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    border-radius: var(--mcu-radius-card);
    box-shadow: var(--mcu-shadow-sm);
    transition: all 0.28s cubic-bezier(0.25, 1, 0.5, 1);
}

.mcu-dashboard-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px -4px rgba(15, 23, 42, 0.08), 0 4px 8px -2px rgba(15, 23, 42, 0.04);
    border-color: var(--mcu-border-hover);
}

.mcu-card {
    background: #FFFFFF;
    border-radius: var(--mcu-radius-card);
    transition: all 0.28s cubic-bezier(0.25, 1, 0.5, 1);
}

a:hover>.mcu-card,
a:hover>.mcu-dashboard-card {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px -6px rgba(37, 99, 235, 0.12), 0 4px 10px -4px rgba(15, 23, 42, 0.06);
    border-color: rgba(37, 99, 235, 0.25);
}

a:hover>.mcu-card img,
a:hover>.mcu-dashboard-card img {
    transform: scale(1.04);
}

/* Search Bar Focus Glow Effect */
.mcu-card:focus-within {
    border-color: rgba(37, 99, 235, 0.4) !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1), var(--mcu-shadow-sm) !important;
}

/* Hero Banner Gradient Variations Per Page */
.mcu-hero-books {
    background: linear-gradient(135deg, #064E3B 0%, #047857 50%, #10B981 100%) !important;
}

.mcu-hero-exams {
    background: linear-gradient(135deg, #312E81 0%, #4338CA 50%, #6366F1 100%) !important;
}

.mcu-hero-progress {
    background: linear-gradient(135deg, #78350F 0%, #B45309 50%, #F59E0B 100%) !important;
}

.mcu-hero-contributors {
    background: linear-gradient(135deg, #701A75 0%, #A21CAF 50%, #D946EF 100%) !important;
}

.mcu-hero-profile {
    background: linear-gradient(135deg, #0C4A6E 0%, #0284C7 50%, #38BDF8 100%) !important;
}

/* Page Content Fade-In Animation */
.mcu-dashboard-view,
.mcu-books-view,
.mcu-exams-view,
.mcu-pustaka-view,
.mcu-contributors-view,
.mcu-help-center-view {
    animation: mcuFadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Section Wrapper with Tight Whitespace */
.mcu-section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
}

@media (max-width: 768px) {
    .mcu-section {
        padding-top: 2.25rem;
        padding-bottom: 2.25rem;
    }

    .mcu-hero-title {
        font-size: 2.15rem !important;
        letter-spacing: -0.02em !important;
    }

    .mcu-preview-card {
        padding: 1.25rem !important;
    }

    .mcu-pricing-card {
        padding: 1.75rem 1.25rem !important;
    }

    .mcu-testimonial-slide {
        padding: 0 6px !important;
    }

    .mcu-final-cta-card {
        padding: 2.5rem 1.25rem !important;
    }
}

/* Stat Box with Hover Lift Animation */
.mcu-stat-box {
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    border-radius: 16px;
    padding: 1.5rem 1rem;
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    box-shadow: var(--mcu-shadow-sm);
    height: 100%;
}

.mcu-stat-box:hover {
    transform: translateY(-4px);
    border-color: var(--mcu-primary);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.08);
}

/* Section Header Typography */
.mcu-section-label {
    display: inline-block;
    background: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.mcu-section-title {
    font-weight: 800;
    font-size: clamp(1.85rem, 3.5vw, 2.75rem);
    letter-spacing: -0.03em;
    line-height: 1.18;
    color: var(--mcu-text-dark);
}

.mcu-section-subtitle {
    color: var(--mcu-text-muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Hero Section Elements */
.mcu-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);
    color: var(--mcu-primary);
    border: 1px solid rgba(37, 99, 235, 0.22);
    padding: 7px 18px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.08);
}

/* Minimal Sticky Navbar (Apple / Stripe style) */
.mcu-navbar-v5 {
    background: rgba(255, 255, 255, 0.92) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--mcu-border) !important;
    border-radius: 16px !important;
    box-shadow: var(--mcu-shadow-sm) !important;
    padding: 10px 20px !important;
    margin-top: 1rem;
    transition: all 0.2s ease;
}

.mcu-nav-link {
    color: #475569 !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    padding: 8px 14px !important;
    border-radius: 8px;
    transition: color 0.2s ease, background 0.2s ease;
    text-decoration: none !important;
    white-space: nowrap;
}

.mcu-nav-link:hover {
    color: var(--mcu-primary) !important;
    background: #F1F5F9;
}

/* Mobile: kecilkan logo & tombol agar tetap satu baris */
@media (max-width: 767px) {
    .mcu-navbar-v5 {
        padding: 8px 12px !important;
        border-radius: 12px !important;
        gap: 0.4rem !important;
    }

    .mcu-navbar-v5 .navbar-brand img {
        height: 32px !important;
    }

    .mcu-navbar-v5 .btn-mcu-primary,
    .mcu-navbar-v5 .btn-mcu-secondary {
        font-size: 12px !important;
        padding: 7px 12px !important;
    }

    .mcu-navbar-v5 .d-flex.align-items-center.gap-3 {
        gap: 0.35rem !important;
    }
}

/* Primary Button (Stripe / Linear) */
.btn-mcu-primary {
    background-color: var(--mcu-primary) !important;
    color: #FFFFFF !important;
    border: 1px solid var(--mcu-primary) !important;
    border-radius: var(--mcu-radius-btn) !important;
    font-weight: 700 !important;
    font-size: 14px !important;
    padding: 10px 20px !important;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2) !important;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
    text-decoration: none !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    white-space: nowrap !important;
}

.btn-mcu-primary::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transform: rotate(30deg) translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-mcu-primary:hover::after {
    transform: rotate(30deg) translateX(100%);
}

.btn-mcu-primary:hover {
    background-color: var(--mcu-primary-hover) !important;
    border-color: var(--mcu-primary-hover) !important;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35) !important;
    color: #FFFFFF !important;
}

/* Secondary Button (Minimal Glass/White) */
.btn-mcu-secondary {
    background-color: #FFFFFF !important;
    color: var(--mcu-text-dark) !important;
    border: 1px solid var(--mcu-border) !important;
    border-radius: var(--mcu-radius-btn) !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    padding: 11px 22px !important;
    box-shadow: var(--mcu-shadow-sm) !important;
    transition: all 0.2s ease !important;
    text-decoration: none !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-mcu-secondary:hover {
    background-color: #F8FAFC !important;
    border-color: var(--mcu-border-hover) !important;
    color: var(--mcu-text-dark) !important;
    transform: translateY(-1px);
    box-shadow: var(--mcu-shadow-md) !important;
}

/* Clean White Card (18px Radius) */
.mcu-card {
    background: var(--mcu-surface);
    border: 1px solid var(--mcu-border);
    border-radius: var(--mcu-radius-card);
    padding: 2rem;
    box-shadow: var(--mcu-shadow-sm);
    transition: all 0.25s ease;
    height: 100%;
}

.mcu-card:hover {
    border-color: var(--mcu-border-hover);
    box-shadow: var(--mcu-shadow-lg);
    transform: translateY(-3px);
}

/* Hero Section Elements */
.mcu-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #EFF6FF;
    color: var(--mcu-primary);
    border: 1px solid #BFDBFE;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
}

/* Floating Info Badges on Hero Phone Mockup */
.mcu-hero-mockup-wrap {
    position: relative;
    display: inline-block;
}

.mcu-hero-badge-float-1 {
    position: absolute;
    top: 12%;
    left: -15px;
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    border-radius: 14px;
    padding: 10px 16px;
    box-shadow: var(--mcu-shadow-lg);
    z-index: 5;
    font-size: 13px;
    font-weight: 700;
    color: var(--mcu-text-dark);
}

.mcu-hero-badge-float-2 {
    position: absolute;
    bottom: 12%;
    right: -15px;
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    border-radius: 14px;
    padding: 10px 16px;
    box-shadow: var(--mcu-shadow-lg);
    z-index: 5;
    font-size: 13px;
    font-weight: 700;
    color: var(--mcu-text-dark);
}

/* Grayscale Partner Logos & Cards */
.mcu-partner-box {
    background: #FFFFFF;
    border-radius: 16px;
    padding: 14px 20px;
    border: 1px solid var(--mcu-border);
    box-shadow: var(--mcu-shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    height: 80px;
}

.mcu-partner-box:hover {
    border-color: var(--mcu-border-hover);
    box-shadow: var(--mcu-shadow-md);
    transform: translateY(-2px);
}

.mcu-partner-logo {
    height: 44px;
    width: auto;
    max-width: 165px;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.mcu-partner-box:hover .mcu-partner-logo {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
}

.mcu-price-original {
    text-decoration: line-through;
    color: #94A3B8;
    font-size: 1.15rem;
    font-weight: 600;
}

/* Platform Preview Interactive Tab System */
.mcu-preview-tab-btn {
    background: transparent;
    border: none;
    color: var(--mcu-text-muted);
    font-weight: 600;
    font-size: 14px;
    padding: 10px 20px;
    border-radius: 10px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.mcu-preview-tab-btn:hover {
    color: var(--mcu-text-dark);
    background: #F1F5F9;
}

.mcu-preview-tab-btn.active {
    color: var(--mcu-primary);
    background: #EFF6FF;
    font-weight: 700;
}

/* How It Works Steps */
.mcu-step-number {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: #EFF6FF;
    color: var(--mcu-primary);
    font-weight: 800;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

/* Single Pricing Panel Design */
.mcu-pricing-panel {
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
    transition: box-shadow 0.3s ease;
}

.mcu-pricing-panel:hover {
    box-shadow: 0 16px 40px rgba(37, 99, 235, 0.1);
}

@media (min-width: 992px) {
    .border-end-lg {
        border-right: 1px solid #E2E8F0 !important;
    }
}

@media (max-width: 991.98px) {
    .border-end-lg {
        border-right: none !important;
        border-bottom: 1px solid #E2E8F0 !important;
        padding-bottom: 1.5rem !important;
        margin-bottom: 1.5rem !important;
    }
}

/* Modern FAQ Accordion (Clean Notion / Apple Style) */
.mcu-accordion-item {
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px !important;
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: all 0.25s ease;
}

.mcu-accordion-item:has(.accordion-button:not(.collapsed)) {
    border-color: rgba(37, 99, 235, 0.4) !important;
    background-color: rgba(37, 99, 235, 0.015) !important;
}

.mcu-accordion-button {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    text-align: left !important;
    background: transparent !important;
    color: var(--mcu-text-dark) !important;
    font-weight: 700 !important;
    font-size: 1rem !important;
    padding: 1.1rem 1.35rem !important;
    box-shadow: none !important;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.mcu-accordion-button::after {
    margin-left: auto !important;
    flex-shrink: 0 !important;
}

.mcu-accordion-button:not(.collapsed) {
    color: var(--mcu-blue) !important;
}

.mcu-accordion-body {
    padding: 0 1.35rem 1.25rem 1.35rem;
    font-size: 0.935rem;
    line-height: 1.6;
    color: #4B5563;
}

.hover-primary {
    transition: color 0.2s ease;
}

.hover-primary:hover {
    color: var(--mcu-blue) !important;
}

.mcu-faq-store-tabs .nav-link {
    background: #F3F4F6;
    color: #4B5563;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.2s ease;
}

.mcu-faq-store-tabs .nav-link.active {
    background: var(--mcu-blue) !important;
    color: #FFFFFF !important;
    border-color: var(--mcu-blue) !important;
}

/* Modern 12-Testimonial Slider Styles */
.mcu-testimonial-slider-container {
    position: relative;
    overflow: hidden;
    padding: 10px 4px 20px 4px;
}

.mcu-testimonial-track {
    display: flex;
    transition: transform 0.45s cubic-bezier(0.25, 1, 0.5, 1);
    will-change: transform;
}

.mcu-testimonial-slide {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
    padding: 0 12px;
    box-sizing: border-box;
}

@media (max-width: 991.98px) {
    .mcu-testimonial-slide {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@media (max-width: 575.98px) {
    .mcu-testimonial-slide {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

.mcu-testimonial-card-modern {
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    border-radius: 20px;
    padding: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--mcu-shadow-sm);
    transition: all 0.3s ease;
    position: relative;
}

.mcu-testimonial-card-modern:hover {
    border-color: var(--mcu-border-hover);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
    transform: translateY(-4px);
}

.mcu-slider-nav-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #FFFFFF;
    border: 1px solid var(--mcu-border);
    color: var(--mcu-text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--mcu-shadow-sm);
    transition: all 0.25s ease;
    z-index: 5;
}

.mcu-slider-nav-btn:hover:not(:disabled) {
    background: var(--mcu-primary);
    color: #FFFFFF;
    border-color: var(--mcu-primary);
    transform: scale(1.08);
    box-shadow: var(--mcu-shadow-md);
}

.mcu-slider-nav-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.mcu-slider-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.mcu-slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #CBD5E1;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mcu-slider-dot.active {
    width: 28px;
    border-radius: 12px;
    background: var(--mcu-primary);
}

.mcu-accordion-button:not(.collapsed) {
    color: var(--mcu-primary) !important;
}

.mcu-accordion-body {
    padding: 0 1.5rem 1.25rem 1.5rem !important;
    color: #475569;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Final CTA Card - Soft, Clean & Simple Premium Blue */
.mcu-final-cta-card {
    background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 50%, #3B82F6 100%);
    border-radius: 20px;
    padding: 2.25rem 2rem;
    color: #FFFFFF;
    text-align: center;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.16);
}

/* Footer */
.mcu-footer {
    background: #FFFFFF;
    border-top: 1px solid var(--mcu-border);
    padding-top: 4rem;
    padding-bottom: 2.5rem;
    color: var(--mcu-text-muted);
}

.mcu-footer-title {
    color: var(--mcu-text-dark);
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 1.25rem;
}

.mcu-footer-link {
    color: #64748B !important;
    text-decoration: none !important;
    font-size: 14px;
    display: block;
    margin-bottom: 0.65rem;
    transition: color 0.2s ease;
}

.mcu-footer-link:hover {
    color: var(--mcu-primary) !important;
}

/* ==========================================================================
   35:65 SPLIT AUTH MODAL SYSTEM (Notion / Stripe Grade)
   ========================================================================== */

.mcu-auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 99999;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    overflow-y: auto;
    overscroll-behavior: contain !important;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

/* Modal Overlay Visibility Trigger Rules */
#btn-auth:checked~.mcu-auth-overlay,
#btn-auth:checked~#auth,
#btn-auth:checked~.auth {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

#btn-auth:not(:checked)~.mcu-auth-overlay,
#btn-auth:not(:checked)~#auth,
#btn-auth:not(:checked)~.auth {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

/* Auth Form Section Display Toggle Rules (Livewire Morph Resistant) */
.auth-signup,
.auth-forgot {
    display: none;
}

.auth-login {
    display: block;
}

#auth[data-tab="login"] .auth-login,
.mcu-auth-overlay[data-tab="login"] .auth-login {
    display: block !important;
}

#auth[data-tab="login"] .auth-signup,
.mcu-auth-overlay[data-tab="login"] .auth-signup,
#auth[data-tab="login"] .auth-forgot,
.mcu-auth-overlay[data-tab="login"] .auth-forgot {
    display: none !important;
}

#auth[data-tab="signup"] .auth-signup,
.mcu-auth-overlay[data-tab="signup"] .auth-signup {
    display: block !important;
}

#auth[data-tab="signup"] .auth-login,
.mcu-auth-overlay[data-tab="signup"] .auth-login,
#auth[data-tab="signup"] .auth-forgot,
.mcu-auth-overlay[data-tab="signup"] .auth-forgot {
    display: none !important;
}

#auth[data-tab="forgot"] .auth-forgot,
.mcu-auth-overlay[data-tab="forgot"] .auth-forgot {
    display: block !important;
}

#auth[data-tab="forgot"] .auth-login,
.mcu-auth-overlay[data-tab="forgot"] .auth-login,
#auth[data-tab="forgot"] .auth-signup,
.mcu-auth-overlay[data-tab="forgot"] .auth-signup {
    display: none !important;
}

.mcu-auth-card-3565 {
    position: relative;
    width: 100%;
    max-width: 980px;
    height: 640px;
    max-height: 94vh;
    background: #FFFFFF;
    border-radius: 24px;
    box-shadow: 0 25px 70px -15px rgba(15, 23, 42, 0.25);
    display: flex;
    flex-direction: row;
    overflow: hidden !important;
    border: 1px solid var(--mcu-border);
    animation: modalScaleIn 0.3s ease;
}

/* Floating Close Button X */
.mcu-auth-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 100010;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #F1F5F9;
    color: #475569;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--mcu-border);
    font-size: 15px;
    transition: all 0.2s ease;
}

.mcu-auth-close-btn:hover {
    background: #FFFFFF;
    color: #EF4444;
    border-color: #FCA5A5;
    transform: scale(1.08);
}

/* LEFT SIDE (35% WIDTH) — Modern Blue Gradient Panel */
.mcu-auth-left-35 {
    width: 35%;
    height: 100%;
    background: linear-gradient(150deg, #0F172A 0%, #1E3A8A 50%, #2563EB 100%);
    border-right: none;
    padding: 2rem 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

/* Ambient glow effects on left panel */
.mcu-auth-left-35::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -30%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
    filter: blur(40px);
    pointer-events: none;
}

.mcu-auth-left-35::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -20%;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.2) 0%, transparent 70%);
    filter: blur(40px);
    pointer-events: none;
}

.mcu-auth-left-35 h3 {
    font-weight: 800;
    font-size: 20px;
    letter-spacing: -0.02em;
    color: #FFFFFF;
    margin-top: 0.75rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.mcu-auth-bullet-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 10px;
}

.mcu-auth-bullet-icon {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    flex-shrink: 0;
}

.mcu-auth-stat-box {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 14px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 1;
}

/* RIGHT SIDE (65% WIDTH) — Form & Controls */
.mcu-auth-right-65 {
    width: 65%;
    height: 100%;
    padding: 2.25rem 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow-y: auto !important;
    overscroll-behavior: contain !important;
    background: #FFFFFF;
}

@media (max-width: 860px) {
    .mcu-auth-card-3565 {
        flex-direction: column;
        max-width: 480px;
        height: auto;
        max-height: 92vh;
        border-radius: 20px;
    }

    .mcu-auth-left-35 {
        display: none;
    }

    .mcu-auth-right-65 {
        width: 100%;
        padding: 2rem 1.5rem;
    }
}

/* Google Sign-in Button (Stripe / Canva style) */
.btn-google-auth-clean {
    background: #FFFFFF !important;
    color: var(--mcu-text-dark) !important;
    border: 1px solid var(--mcu-border) !important;
    border-radius: 12px !important;
    padding: 11px 18px !important;
    font-weight: 700 !important;
    font-size: 13.5px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 12px !important;
    box-shadow: var(--mcu-shadow-sm) !important;
    transition: all 0.2s ease !important;
    text-decoration: none !important;
    width: 100%;
}

.btn-google-auth-clean:hover {
    background: #F8FAFC !important;
    border-color: var(--mcu-border-hover) !important;
    transform: translateY(-1px);
    box-shadow: var(--mcu-shadow-md) !important;
}

/* Inputs & Form Groups */
.mcu-form-group {
    margin-bottom: 0.75rem;
}

.mcu-form-group label {
    font-size: 12px;
    font-weight: 700;
    color: #334155;
    margin-bottom: 4px;
    display: block;
}

.mcu-input-wrapper {
    position: relative;
}

.mcu-input-wrapper .form-control,
.mcu-input-wrapper .form-select {
    background-color: #FFFFFF !important;
    border: 1px solid var(--mcu-border) !important;
    border-radius: 10px !important;
    padding: 8.5px 14px 8.5px 38px !important;
    font-size: 13px !important;
    color: var(--mcu-text-dark) !important;
    transition: all 0.2s ease !important;
}

.mcu-input-wrapper .form-control:focus,
.mcu-input-wrapper .form-select:focus {
    border-color: var(--mcu-primary) !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12) !important;
}

.mcu-input-wrapper .input-icon-left {
    position: absolute;
    left: 13px;
    top: 50%;
    transform: translateY(-50%);
    color: #94A3B8;
    font-size: 14px;
}

.mcu-input-wrapper .input-icon-right {
    position: absolute;
    right: 13px;
    top: 50%;
    transform: translateY(-50%);
    color: #94A3B8;
    font-size: 14px;
    cursor: pointer;
    z-index: 10;
    pointer-events: auto;
}

/* ==========================================================================
   MCUApps V2 Book Reader & Table of Contents (Modern Premium Design)
   ========================================================================== */

/* Modern Top Header Navbar for Book Reader & TOC (Fixed Top Bar) */
.mcu-book-navbar-v2 {
    background: #2563EB !important;
    color: #FFFFFF !important;
    padding: 12px 24px !important;
    box-shadow: 0 6px 24px -2px rgba(37, 99, 235, 0.35) !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 1050 !important;
}

.book-layout .content {
    padding-top: 64px !important;
}

@media (max-width: 768px) {
    .book-layout .content {
        padding-top: 52px !important;
    }
}

.mcu-book-navbar-v2 .container-xl {
    display: grid !important;
    grid-template-columns: 1fr auto 1fr !important;
    align-items: center !important;
    gap: 12px !important;
}

.mcu-nav-left {
    justify-self: start;
    white-space: nowrap;
}

.mcu-nav-center {
    justify-self: center;
    text-align: center;
    min-width: 0 !important;
    max-width: 640px;
    width: 100%;
    overflow: hidden;
}

.mcu-nav-center .title-heading {
    color: #FFFFFF;
    margin: 0;
    text-align: center;
    max-width: 100% !important;
}

.mcu-nav-center .title-heading.short-title {
    font-size: 17.5px !important;
    font-weight: 800 !important;
    letter-spacing: 0.03em !important;
    white-space: normal !important;
    word-break: break-word;
    text-align: center !important;
    line-height: 1.25 !important;
}

.mcu-nav-center .title-heading.long-title {
    font-size: 13.5px !important;
    font-weight: 800 !important;
    letter-spacing: -0.01em !important;
    white-space: normal !important;
    word-break: break-word;
    display: -webkit-box !important;
    -webkit-line-clamp: 3 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    line-height: 1.25 !important;
    text-align: center !important;
}

.mcu-nav-right {
    justify-self: end;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .mcu-book-navbar-v2 {
        padding: 8px 12px !important;
    }

    .mcu-book-navbar-v2 .container-xl {
        grid-template-columns: auto minmax(0, 1fr) auto !important;
        gap: 6px !important;
    }

    .mcu-nav-center .title-heading.short-title {
        font-size: 14.5px !important;
    }

    .mcu-nav-center .title-heading.long-title {
        font-size: 12px !important;
        line-height: 1.2 !important;
    }

    .mcu-book-nav-btn {
        padding: 5px 10px !important;
        font-size: 11.5px !important;
    }
}

.mcu-book-nav-btn,
.mcu-book-nav-btn-accent {
    background: rgba(255, 255, 255, 0.18) !important;
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
    color: #FFFFFF !important;
    border: 1px solid rgba(255, 255, 255, 0.32) !important;
    border-radius: 50px !important;
    padding: 7px 18px !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    text-decoration: none !important;
    transition: all 0.25s ease !important;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08) !important;
}

.mcu-book-nav-btn:hover,
.mcu-book-nav-btn-accent:hover {
    background: #FFFFFF !important;
    color: #2563EB !important;
    border-color: #FFFFFF !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.18) !important;
}

/* Modern Reading Container & Paper Card */
.mcu-reading-wrapper {
    background: #F8FAFC;
    min-height: auto;
    padding: 1.25rem 1.25rem 0.5rem 1.25rem !important;
}

.mcu-reading-paper {
    background: #FFFFFF;
    border-radius: 20px;
    border: 1px solid #E2E8F0;
    padding: 2rem 2.5rem !important;
    box-shadow: 0 10px 35px rgba(15, 23, 42, 0.05);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    color: #1E293B;
    font-size: 15px;
    line-height: 1.7;
}

/* Override raw HTML column squashing in book content */
.mcu-reading-paper .content-item,
.mcu-reading-paper .pages {
    width: 100% !important;
    max-width: 100% !important;
    display: block !important;
    float: none !important;
    columns: 1 !important;
    -webkit-columns: 1 !important;
    -moz-columns: 1 !important;
    column-count: 1 !important;
}

.mcu-reading-paper h1,
.mcu-reading-paper h2 {
    color: #0F172A;
    font-size: 22px !important;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.mcu-reading-paper h3,
.mcu-reading-paper h4 {
    color: #0F172A;
    font-size: 18px !important;
    font-weight: 700;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.mcu-reading-paper,
.mcu-reading-paper-content,
.mcu-reading-paper .content-item {
    text-align: justify !important;
    text-justify: inter-word !important;
    hyphens: auto;
    -webkit-hyphens: auto;
}

.mcu-reading-paper p,
.mcu-reading-paper-content p,
.mcu-reading-paper li,
.mcu-reading-paper-content li,
.mcu-reading-paper ol,
.mcu-reading-paper-content ol,
.mcu-reading-paper ul,
.mcu-reading-paper-content ul,
.mcu-reading-paper blockquote,
.mcu-reading-paper-content blockquote,
.mcu-reading-paper span:not([class*="badge"]):not([class*="bi"]):not([class*="icon"]):not(.btn-pag-nav *),
.mcu-reading-paper-content span:not([class*="badge"]):not([class*="bi"]):not([class*="icon"]):not(.btn-pag-nav *),
.mcu-reading-paper div:not([class*="modal"]):not([class*="btn"]):not([class*="d-flex"]):not([class*="row"]):not([class*="col"]),
.mcu-reading-paper-content div:not([class*="modal"]):not([class*="btn"]):not([class*="d-flex"]):not([class*="row"]):not([class*="col"]) {
    font-size: 15px !important;
    line-height: 1.8 !important;
    color: #334155;
    margin-bottom: 1rem;
    text-align: justify !important;
    text-justify: inter-word !important;
    hyphens: auto;
    -webkit-hyphens: auto;
    word-break: normal;
    overflow-wrap: break-word;
}

/* Headings remain structured and clean */
.mcu-reading-paper h1,
.mcu-reading-paper h2,
.mcu-reading-paper h3,
.mcu-reading-paper h4,
.mcu-reading-paper h5,
.mcu-reading-paper h6,
.mcu-reading-paper-content h1,
.mcu-reading-paper-content h2,
.mcu-reading-paper-content h3,
.mcu-reading-paper-content h4,
.mcu-reading-paper-content h5,
.mcu-reading-paper-content h6 {
    text-align: left;
    text-justify: auto;
}

/* Respect explicit centered or right-aligned formatting */
.mcu-reading-paper [style*="text-align: center"],
.mcu-reading-paper [style*="text-align:center"],
.mcu-reading-paper .text-center,
.mcu-reading-paper-content [style*="text-align: center"],
.mcu-reading-paper-content [style*="text-align:center"],
.mcu-reading-paper-content .text-center {
    text-align: center !important;
}

.mcu-reading-paper [style*="text-align: right"],
.mcu-reading-paper [style*="text-align:right"],
.mcu-reading-paper .text-end,
.mcu-reading-paper .text-right,
.mcu-reading-paper-content [style*="text-align: right"],
.mcu-reading-paper-content [style*="text-align:right"],
.mcu-reading-paper-content .text-end,
.mcu-reading-paper-content .text-right {
    text-align: right !important;
}

.mcu-reading-paper video,
.mcu-reading-paper iframe,
.mcu-reading-paper img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 1rem 0;
}

/* Desktop 2-Column Book Layout Optimization via Bootstrap Grid */
.mcu-reading-paper .content-item {
    line-height: 1.8;
    color: #334155;
}

/* Security: Disable video download menu in WebKit browsers */
video::-internal-media-controls-download-button {
    display: none !important;
}

video::-webkit-media-controls-enclosure {
    overflow: hidden !important;
}

/* Mobile adjustments for reading paper */
@media (max-width: 768px) {
    .mcu-reading-wrapper {
        padding: 0.75rem 0.5rem 0.5rem 0.5rem !important;
    }

    .mcu-reading-paper {
        padding: 1.25rem 1rem !important;
        border-radius: 16px !important;
        font-size: 14px !important;
        line-height: 1.65 !important;
    }

    .mcu-reading-paper .mcu-reading-paper-content {
        column-count: 1 !important;
        -webkit-column-count: 1 !important;
    }

    .mcu-reading-paper h1,
    .mcu-reading-paper h2 {
        font-size: 18px !important;
        margin-top: 1rem !important;
        margin-bottom: 0.5rem !important;
    }

    .mcu-reading-paper h3,
    .mcu-reading-paper h4 {
        font-size: 16px !important;
        margin-top: 0.75rem !important;
        margin-bottom: 0.5rem !important;
    }

    .mcu-reading-paper p,
    .mcu-reading-paper span,
    .mcu-reading-paper div {
        font-size: 14px !important;
        line-height: 1.65 !important;
        margin-bottom: 0.85rem !important;
    }

    .mcu-book-navbar-v2 {
        padding: 8px 12px !important;
    }

    .mcu-book-navbar-v2 .title-heading {
        font-size: 13px !important;
        text-align: center !important;
    }
}

/* Modern Floating Paginator V2 */
/* Modern Floating Paginator V2 (Ultra Translucent Glassmorphism - Enlarged Size) */
.mcu-paginator-v2 {
    position: fixed !important;
    bottom: 14px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    z-index: 1050 !important;
    background: rgba(255, 255, 255, 0.45) !important;
    backdrop-filter: blur(12px) saturate(160%) !important;
    -webkit-backdrop-filter: blur(12px) saturate(160%) !important;
    border: 1px solid rgba(203, 213, 225, 0.8) !important;
    border-radius: 50px !important;
    padding: 7px 18px !important;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.6rem !important;
    white-space: nowrap !important;
    max-width: calc(100vw - 1rem) !important;
}

.mcu-paginator-v2 a,
.mcu-paginator-v2 .btn-pag-nav {
    color: #1D4ED8 !important;
    font-weight: 700 !important;
    font-size: 13.5px !important;
    text-decoration: none !important;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px !important;
    border-radius: 50px;
    transition: all 0.2s ease;
    white-space: nowrap !important;
}

.mcu-paginator-v2 a i,
.mcu-paginator-v2 .btn-pag-nav i {
    font-size: 15px !important;
    font-weight: 800 !important;
}

.mcu-paginator-v2 a:hover,
.mcu-paginator-v2 .btn-pag-nav:hover {
    background: rgba(219, 234, 254, 0.85) !important;
    color: #1E40AF !important;
}

.mcu-paginator-v2 .page-info {
    font-size: 13px !important;
    font-weight: 700 !important;
    color: #1E293B !important;
    white-space: nowrap !important;
    padding: 0 4px !important;
}

.mcu-book-footer-container {
    margin-top: 0.5rem !important;
    margin-bottom: 0 !important;
}

.mcu-app-footer {
    padding-top: 4px !important;
    padding-bottom: 4px !important;
    margin-top: 0 !important;
    font-size: 12.5px !important;
}

.mcu-app-footer p {
    font-size: 12.5px !important;
    line-height: 1.3 !important;
    opacity: 1 !important;
    color: #475569 !important;
    font-weight: 500 !important;
}

@media (max-width: 768px) {
    .mcu-paginator-v2 {
        position: fixed !important;
        bottom: 12px !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        z-index: 1050 !important;
        background: rgba(255, 255, 255, 0.45) !important;
        backdrop-filter: blur(12px) saturate(160%) !important;
        -webkit-backdrop-filter: blur(12px) saturate(160%) !important;
        border: 1px solid rgba(203, 213, 225, 0.8) !important;
        padding: 5px 12px !important;
        gap: 0.35rem !important;
        max-width: calc(100vw - 0.75rem) !important;
    }

    .mcu-paginator-v2 a,
    .mcu-paginator-v2 .btn-pag-nav {
        font-size: 12.5px !important;
        padding: 5px 10px !important;
    }

    .mcu-paginator-v2 a i,
    .mcu-paginator-v2 .btn-pag-nav i {
        font-size: 13.5px !important;
    }

    .mcu-paginator-v2 .page-info {
        font-size: 11.5px !important;
    }

    .mcu-reading-wrapper {
        padding-bottom: 72px !important;
    }

    .mcu-book-footer-container {
        padding-bottom: 60px !important;
    }
}

/* Modern Table of Contents V2 Styling */
.mcu-toc-card {
    background: #FFFFFF;
    border-radius: 20px;
    border: 1px solid #E2E8F0;
    padding: 2.25rem 2.5rem;
    box-shadow: 0 10px 35px rgba(15, 23, 42, 0.04);
    max-width: 1400px;
    width: 100%;
    margin: 1.5rem auto;
}

.mcu-toc-item-h1 {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    overflow: hidden !important;
    width: 100%;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.mcu-toc-item-h1:hover {
    background: #EFF6FF;
    border-color: #BFDBFE;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.08);
}

.mcu-toc-item-h1 a {
    color: #0F172A !important;
    font-weight: 700;
    font-size: 13.5px;
    text-decoration: none !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

.mcu-toc-item-h2 {
    background: #FFFFFF;
    border: 1px solid #F1F5F9;
    border-radius: 10px;
    padding: 10px 14px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    overflow: hidden !important;
    width: 100%;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.mcu-toc-item-h2:hover {
    background: #F8FAFC;
    border-color: #E2E8F0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
}

.mcu-toc-item-h2 a {
    color: #334155 !important;
    font-weight: 600;
    font-size: 13px;
    text-decoration: none !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

.mcu-toc-icon-box {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.mcu-toc-page-badge {
    background: #EFF6FF;
    color: #2563EB;
    font-weight: 700;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 50px;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
}

/* Ultra-Modern Compact Video Modal V2 (660px Spring Animation & Gradient Header) */
.modal-backdrop.show {
    background-color: rgba(15, 23, 42, 0.6) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
}

/* Modern Spring Pop-Up Animation */
.modal.fade .modal-dialog {
    transform: scale(0.88) translateY(24px) !important;
    opacity: 0 !important;
    transition: transform 0.38s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.28s ease !important;
}

.modal.show .modal-dialog {
    transform: scale(1) translateY(0) !important;
    opacity: 1 !important;
}

#book-content .modal-dialog,
.mcu-reading-wrapper .modal-dialog,
.modal-dialog {
    max-width: 660px !important;
    width: 88vw !important;
    margin: 1.5rem auto !important;
}

#book-content .modal-content,
.mcu-reading-wrapper .modal-content,
.modal-content {
    background: #FFFFFF !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    border-radius: 24px !important;
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.22) !important;
    color: #0F172A !important;
    overflow: hidden !important;
}

/* Colorful Solid Blue Header */
#book-content .modal-header,
.mcu-reading-wrapper .modal-header,
.modal-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.15) !important;
    padding: 1.1rem 1.5rem !important;
    background: #2563EB !important;
}

#book-content .modal-title,
.mcu-reading-wrapper .modal-title,
.modal-title {
    color: #FFFFFF !important;
    font-weight: 800 !important;
    font-size: 16px !important;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 8px;
}

#book-content .modal-header .btn-close,
.mcu-reading-wrapper .modal-header .btn-close,
.modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%) !important;
    opacity: 0.85 !important;
    transition: all 0.25s ease !important;
}

#book-content .modal-header .btn-close:hover,
.mcu-reading-wrapper .modal-header .btn-close:hover,
.modal-header .btn-close:hover {
    opacity: 1 !important;
    transform: scale(1.15) rotate(90deg);
}

#book-content .modal-body,
.mcu-reading-wrapper .modal-body,
.modal-body {
    padding: 1rem !important;
    background: #F8FAFC !important;
}

#book-content .modal-body video,
.mcu-reading-wrapper .modal-body video,
.modal-body video {
    width: 100% !important;
    height: auto !important;
    max-height: 70vh !important;
    aspect-ratio: auto !important;
    object-fit: cover !important;
    border-radius: 12px !important;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.12) !important;
    border: none !important;
    outline: none !important;
    background: transparent !important;
}

#book-content .modal-footer,
.mcu-reading-wrapper .modal-footer,
.modal-footer {
    border-top: 1px solid #F1F5F9 !important;
    padding: 0.85rem 1.5rem !important;
    background: #FFFFFF !important;
}

#book-content .modal-footer .btn,
.mcu-reading-wrapper .modal-footer .btn,
.modal-footer .btn {
    background: #F1F5F9 !important;
    color: #475569 !important;
    border: 1px solid #CBD5E1 !important;
    border-radius: 50px !important;
    padding: 7px 22px !important;
    font-weight: 700 !important;
    font-size: 13px !important;
    transition: all 0.2s ease !important;
}

#book-content .modal-footer .btn:hover,
.mcu-reading-wrapper .modal-footer .btn:hover,
.modal-footer .btn:hover {
    background: #2563EB !important;
    border-color: #2563EB !important;
    color: #FFFFFF !important;
}

/* Normal Blue Video Trigger Buttons inside content */
.mcu-reading-paper button[data-bs-toggle="modal"],
.mcu-reading-paper .btn-primary,
.mcu-reading-paper a.btn-primary {
    background: linear-gradient(135deg, #1E40AF 0%, #2563EB 100%) !important;
    color: #FFFFFF !important;
    border: none !important;
    border-radius: 50px !important;
    padding: 9px 24px !important;
    font-weight: 700 !important;
    font-size: 13.5px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 8px !important;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25) !important;
    transition: all 0.25s ease !important;
    margin: 0.85rem 0 !important;
    cursor: pointer !important;
}

.mcu-reading-paper button[data-bs-toggle="modal"]:hover,
.mcu-reading-paper .btn-primary:hover {
    background: #1D4ED8 !important;
    border-color: #1D4ED8 !important;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35) !important;
    transform: translateY(-2px) !important;
    color: #FFFFFF !important;
}

/* Vibrant Emerald Green Buttons — EXCLUSIVELY for Verified Offline Videos */
.btn-video-offline,
.mcu-reading-paper button.btn-video-offline,
.mcu-reading-paper .btn-video-offline {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%) !important;
    color: #FFFFFF !important;
    border: none !important;
    border-radius: 50px !important;
    padding: 9px 24px !important;
    font-weight: 700 !important;
    font-size: 13.5px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 8px !important;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35) !important;
    transition: all 0.25s ease !important;
    margin: 0.85rem 0 !important;
    cursor: pointer !important;
}

.btn-video-offline:hover,
.mcu-reading-paper button.btn-video-offline:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%) !important;
    border-color: #047857 !important;
    box-shadow: 0 6px 22px rgba(16, 185, 129, 0.5) !important;
    transform: translateY(-2px) !important;
    color: #FFFFFF !important;
}

.mcu-reading-paper button[data-bs-toggle="modal"] i,
.mcu-reading-paper .btn-primary i,
.btn-video-offline i {
    font-size: 15px !important;
    color: #FFFFFF !important;
}

/* Green Modal Header — EXCLUSIVELY for Verified Offline Videos */
#book-content .modal-header.modal-header-offline-video,
.mcu-reading-wrapper .modal-header.modal-header-offline-video {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%) !important;
}

/* Green Badge for Offline Video in TOC & Lists */
.badge-video-offline {
    background: rgba(16, 185, 129, 0.12) !important;
    color: #059669 !important;
    border: 1px solid rgba(16, 185, 129, 0.3) !important;
    font-weight: 700 !important;
    font-size: 11px !important;
    padding: 3px 9px !important;
    border-radius: 50px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 4px !important;
}

/* MCUApps V2 Modern App Footer */
.mcu-app-footer {
    background: transparent;
    border-top: 1px solid #E2E8F0 !important;
    padding: 1.25rem 0;
    color: #64748B;
    font-size: 12.5px;
}

.mcu-app-footer a {
    color: #2563EB !important;
    font-weight: 700;
}

.mcu-app-footer a:hover {
    text-decoration: underline !important;
}

/* ==========================================================================
   MCU APPS V2 — MODERN NATIVE VIDEO PLAYER STYLING (CLEAN & BULLETPROOF)
   ========================================================================== */
video {
    width: 100% !important;
    height: auto !important;
    max-width: 100% !important;
    border-radius: 12px !important;
    background: transparent !important;
    box-shadow: 0 6px 20px rgba(15, 23, 42, 0.15) !important;
    outline: none !important;
    object-fit: cover !important;
}

.modal-body video {
    border-radius: 12px !important;
    margin: 0 auto !important;
    display: block !important;
    object-fit: cover !important;
    background: transparent !important;
}

.modal-content:has(video) {
    border-radius: 16px !important;
    overflow: hidden !important;
}

.mcu-video-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: #000000;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    margin: 8px 0;
}

/* ==========================================================================
   REDESIGNED NAVBAR & HERO SYSTEM (MCUApps V2)
   ========================================================================== */

/* Smooth Scroll & Anchor Offset */
html {
    scroll-behavior: smooth !important;
    scroll-padding-top: 88px !important;
}

section,
[id] {
    scroll-margin-top: 88px !important;
}

/* Glassmorphism Sticky Header Container */
.mcu-header-sticky {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 255, 255, 0.75) !important;
    backdrop-filter: blur(14px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(14px) saturate(180%) !important;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6) !important;
    padding: 10px 0 !important;
    transition: transform 0.2s ease, background 0.2s ease;
    will-change: transform;
    transform: translateZ(0);
}

.mcu-navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

/* Navbar Brand & Logo */
.mcu-navbar-brand {
    display: inline-flex;
    align-items: center;
    text-decoration: none !important;
    gap: 12px;
}

.mcu-brand-img {
    height: 54px;
    width: auto;
    object-fit: contain;
    transition: transform 0.2s ease;
}

.mcu-brand-img:hover {
    transform: scale(1.02);
}

.mcu-brand-divider {
    width: 1px;
    height: 28px;
    background-color: #CBD5E1;
    display: inline-block;
}

.mcu-brand-tagline {
    font-size: 14.5px;
    font-weight: 600;
    color: #475569;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

@media (max-width: 576px) {

    .mcu-brand-divider,
    .mcu-brand-tagline {
        display: none !important;
    }

    .mcu-brand-img {
        height: 42px;
    }
}

/* Navbar Links (Desktop) */
.mcu-nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.mcu-nav-item {
    margin: 0;
}

.mcu-nav-link {
    color: #334155 !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    padding: 8px 16px !important;
    border-radius: 8px;
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1) !important;
    text-decoration: none !important;
    white-space: nowrap;
    display: inline-block;
}

.mcu-nav-link:hover,
.mcu-nav-link:focus-visible {
    color: #2563EB !important;
    background-color: #F1F5F9;
    outline: none;
}

.mcu-nav-link:active {
    transform: scale(0.98);
}

/* Navbar Actions Container */
.mcu-nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Mobile Toggle Hamburger Button */
.mcu-mobile-toggle {
    background: #FFFFFF;
    border: 1px solid #CBD5E1;
    border-radius: 10px;
    padding: 6px 10px;
    color: #0F172A;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mcu-mobile-toggle:hover {
    background-color: #F1F5F9;
    color: #2563EB;
    border-color: #94A3B8;
}

.mcu-mobile-toggle:focus-visible {
    outline: 2px solid #2563EB;
    outline-offset: 2px;
}

/* Mobile Drawer Menu */
.mcu-mobile-drawer {
    display: none;
    background: #FFFFFF;
    border-bottom: 1px solid #E2E8F0;
    box-shadow: 0 12px 28px -6px rgba(15, 23, 42, 0.1);
}

.mcu-mobile-drawer.show {
    display: block;
    animation: mcuFadeInUp 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.mcu-mobile-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mcu-mobile-link {
    display: block;
    padding: 11px 16px;
    font-size: 15px;
    font-weight: 600;
    color: #334155;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.15s ease;
}

.mcu-mobile-link:hover,
.mcu-mobile-link:focus {
    background-color: #F1F5F9;
    color: #2563EB;
}

/* ==========================================================================
   HERO SECTION STYLES
   ========================================================================== */

.mcu-hero-section {
    background: linear-gradient(180deg, #F8FAFC 0%, #EFF6FF 50%, #F8FAFC 100%);
    position: relative;
    overflow: hidden;
}

.mcu-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #EFF6FF;
    color: #1D4ED8;
    border: 1px solid #BFDBFE;
    padding: 7px 18px;
    border-radius: 50px;
    font-size: 13.5px;
    font-weight: 700;
    letter-spacing: -0.01em;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.06);
}

.mcu-hero-headline {
    font-weight: 800;
    font-size: clamp(2.1rem, 3.7vw, 3.15rem);
    letter-spacing: -0.035em;
    line-height: 1.18;
    color: #0F172A;
}

.mcu-hero-description {
    color: #475569;
    font-size: 1.08rem;
    line-height: 1.68;
    max-width: 550px;
}

/* Tersedia Untuk Desktop Download Buttons */
.mcu-download-label {
    font-size: 15px;
    font-weight: 700;
    color: #0F172A;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.btn-mcu-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: #FFFFFF;
    color: #0F172A;
    border: 1.5px solid #E2E8F0;
    border-radius: 12px;
    padding: 11px 22px;
    font-size: 14.5px;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
    cursor: pointer;
}

.btn-mcu-download:hover {
    background: #F8FAFC;
    color: #0284C7;
    border-color: #CBD5E1;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(15, 23, 42, 0.08), 0 3px 8px rgba(15, 23, 42, 0.04);
}

.btn-mcu-download:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(15, 23, 42, 0.04);
}

.btn-mcu-download svg.mcu-download-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

/* Social Proof & Trust Strip under hero buttons */
.mcu-hero-trust-strip {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 14px;
    font-size: 13px;
    color: #475569;
    background: #FFFFFF;
    padding: 8px 18px;
    border-radius: 50px;
    border: 1px solid #E2E8F0;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
    max-width: fit-content;
}

.mcu-hero-trust-strip .trust-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.mcu-hero-trust-strip .trust-bullet {
    color: #CBD5E1;
    font-size: 14px;
}

@media (max-width: 576px) {
    .mcu-hero-trust-strip {
        gap: 8px 10px;
        padding: 6px 14px;
        font-size: 12px;
        justify-content: flex-start;
        border-radius: 12px;
    }
}

/* Hero Right Column Visual Wrap */
.mcu-hero-visual-wrap {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px 0;
    min-height: 480px;
}

/* Ambient Blue Aura Background */
.mcu-hero-aura-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 55% 50%, rgba(219, 234, 254, 0.65) 0%, rgba(239, 246, 255, 0.4) 45%, transparent 75%);
    filter: blur(20px);
    z-index: 0;
    pointer-events: none;
}

/* Background Dot Grid Pattern */
.mcu-hero-dots-pattern {
    position: absolute;
    width: 90%;
    height: 90%;
    background-image: radial-gradient(#BFDBFE 1.5px, transparent 1.5px);
    background-size: 24px 24px;
    z-index: 0;
    opacity: 0.75;
    pointer-events: none;
}

/* SVG Dotted Connecting Lines */
.mcu-hero-connectors {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* Center Standalone 3D Phone Mockups (NO Box Frame!) */
.mcu-phones-showcase {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.4s ease;
}

.mcu-phones-showcase:hover {
    transform: translateY(-6px) scale(1.01);
}

.mcu-phones-img {
    max-height: 460px;
    width: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
    filter: drop-shadow(0 25px 45px rgba(15, 23, 42, 0.14));
}

/* Floating Info Cards (Glassmorphism Cards matching inspiration) */
.mcu-float-card {
    position: absolute;
    z-index: 3;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid rgba(219, 234, 254, 0.95);
    border-radius: 16px;
    padding: 12px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 16px 36px -8px rgba(37, 99, 235, 0.12), 0 4px 12px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    white-space: nowrap;
    transition: all 0.3s ease;
}

.mcu-float-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px -8px rgba(37, 99, 235, 0.18);
}

/* Card 1: Top Left */
.mcu-float-card-1 {
    top: 4%;
    left: -20px;
}

/* Card 2: Top Right */
.mcu-float-card-2 {
    top: 5%;
    right: -15px;
}

/* Card 3: Bottom Left */
.mcu-float-card-3 {
    bottom: 10%;
    left: -25px;
}

/* Card 4: Bottom Right */
.mcu-float-card-4 {
    bottom: 12%;
    right: -20px;
}

.mcu-float-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.mcu-float-text {
    display: flex;
    flex-direction: column;
}

.mcu-float-title {
    font-size: 13px;
    font-weight: 700;
    color: #0F172A;
    line-height: 1.3;
}

.mcu-float-sub {
    font-size: 11px;
    color: #64748B;
    margin-top: 2px;
    font-weight: 500;
}

.mcu-float-progress-wrap {
    width: 100px;
    height: 5px;
    background: #E2E8F0;
    border-radius: 10px;
    margin: 5px 0 2px 0;
    overflow: hidden;
}

.mcu-float-progress-bar {
    display: block;
    height: 100%;
    background: #10B981;
    border-radius: 10px;
}

@keyframes mcuFloatDelayed {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(6px);
    }

    100% {
        transform: translateY(0px);
    }
}

.mcu-float-elem-delayed {
    animation: mcuFloatDelayed 4.5s ease-in-out infinite;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto !important;
    }

    .mcu-float-elem,
    .mcu-float-elem-delayed,
    .btn-mcu-primary::after {
        animation: none !important;
        transition: none !important;
    }
}

/* Media Query Fine-Tuning for Mobile & Tablet */
@media (max-width: 991.98px) {
    .mcu-hero-section {
        padding-top: 1.5rem !important;
        padding-bottom: 2rem !important;
    }

    .mcu-hero-headline {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
    }

    .mcu-hero-description {
        font-size: 0.98rem;
    }

    .mcu-hero-visual-wrap {
        min-height: 380px;
        padding: 10px 0;
    }

    .mcu-phones-img {
        max-height: 340px;
    }

    .mcu-float-card {
        padding: 8px 12px;
        max-width: 175px;
        border-radius: 12px;
        box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.12);
    }

    .mcu-float-card-1 {
        top: 0%;
        left: 0px;
    }

    .mcu-float-card-2 {
        top: 0%;
        right: 0px;
    }

    .mcu-float-card-3 {
        bottom: 0%;
        left: 0px;
    }

    .mcu-float-card-4 {
        bottom: 0%;
        right: 0px;
    }

    .mcu-float-icon {
        width: 32px;
        height: 32px;
        font-size: 15px;
        border-radius: 8px;
    }

    .mcu-float-title {
        font-size: 11px;
    }

    .mcu-float-sub {
        font-size: 9.5px;
    }
}

/* Trusted Partner Logos Section */
.mcu-partner-box {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 14px;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 54px;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.03);
    transition: all 0.2s ease;
}

.mcu-partner-box:hover {
    border-color: #CBD5E1;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.06);
}

.mcu-partner-logo {
    max-height: 32px;
    max-width: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.75;
    transition: all 0.2s ease;
}

.mcu-partner-box:hover .mcu-partner-logo {
    filter: grayscale(0%);
    opacity: 1;
}

@media (max-width: 767.98px) {
    .mcu-hero-visual-wrap {
        display: flex;
        flex-direction: column;
        align-items: center;
        min-height: auto !important;
        padding: 10px 0;
    }

    .mcu-phones-showcase {
        order: 1;
        width: 100%;
        display: flex;
        justify-content: center;
        margin-bottom: 14px;
    }

    .mcu-phones-img {
        max-height: 230px !important;
    }

    .mcu-partner-box {
        height: 42px;
        padding: 6px 10px;
        border-radius: 10px;
    }

    .mcu-partner-logo {
        max-height: 22px;
    }

    .mcu-cards-container {
        order: 2;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        width: 100%;
        padding: 0;
        position: relative;
        z-index: 5;
    }

    .mcu-float-card {
        position: relative !important;
        top: auto !important;
        bottom: auto !important;
        left: auto !important;
        right: auto !important;
        width: 100% !important;
        max-width: 100% !important;
        white-space: normal !important;
        padding: 10px 10px !important;
        border-radius: 14px !important;
        box-shadow: 0 4px 14px rgba(37, 99, 235, 0.08) !important;
        display: flex !important;
        align-items: center !important;
        gap: 8px !important;
    }

    .mcu-float-icon {
        width: 32px !important;
        height: 32px !important;
        font-size: 15px !important;
        border-radius: 8px !important;
        flex-shrink: 0 !important;
    }

    .mcu-float-text {
        min-width: 0;
        flex: 1;
    }

    .mcu-float-title {
        font-size: 11px !important;
        font-weight: 700 !important;
        line-height: 1.25 !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        color: #0F172A !important;
    }

    .mcu-float-sub {
        font-size: 9.5px !important;
        line-height: 1.25 !important;
        color: #64748B !important;
        display: -webkit-box !important;
        -webkit-line-clamp: 2 !important;
        -webkit-box-orient: vertical !important;
        overflow: hidden !important;
        white-space: normal !important;
    }
}

@media (max-width: 576px) {
    .mcu-hero-section {
        padding-top: 1rem !important;
        padding-bottom: 1.5rem !important;
    }

    .mcu-hero-badge {
        font-size: 11px !important;
        padding: 5px 12px !important;
        white-space: normal !important;
    }

    .mcu-hero-headline {
        font-size: 1.55rem !important;
        line-height: 1.25 !important;
        letter-spacing: -0.02em !important;
    }

    .mcu-hero-description {
        font-size: 0.92rem !important;
        line-height: 1.5 !important;
    }

    .mcu-hero-trust-strip {
        gap: 6px 10px !important;
        padding: 8px 12px !important;
        font-size: 11.5px !important;
        border-radius: 12px !important;
        width: 100% !important;
    }

    .btn-mcu-primary,
    .btn-mcu-secondary {
        padding: 12px 18px !important;
        font-size: 14.5px !important;
        justify-content: center !important;
    }
}

/* Interactive Preview Tabs Styling */
.mcu-preview-tabs-wrap {
    display: flex;
    gap: 8px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.mcu-preview-tabs-wrap::-webkit-scrollbar {
    display: none;
}

.mcu-preview-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    color: #475569;
    font-weight: 600;
    font-size: 14px;
    padding: 9px 18px;
    border-radius: 12px;
    transition: all 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
}

.mcu-preview-tab-btn i {
    font-size: 15px;
    line-height: 1;
}

.mcu-preview-tab-btn:hover {
    background: #F1F5F9;
    color: #1E293B;
}

.mcu-preview-tab-btn:focus-visible {
    outline: 2px solid #2563EB;
    outline-offset: 2px;
}

.mcu-preview-tab-btn.active {
    background: #EFF6FF !important;
    border-color: #3B82F6 !important;
    color: #2563EB !important;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.preview-pane {
    transition: opacity 0.25s ease-in-out;
}

@media (prefers-reduced-motion: reduce) {
    .preview-pane {
        transition: none !important;
    }
}

.mcu-quiz-option {
    transition: background 0.15s ease, border-color 0.15s ease;
}

.mcu-quiz-option:hover {
    background: #F8FAFC;
    border-color: #CBD5E1 !important;
}

@media (max-width: 767.98px) {
    .mcu-preview-tabs-wrap {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        gap: 4px !important;
        padding: 4px 0 8px 0 !important;
        margin-bottom: 12px !important;
        width: 100% !important;
        overflow-x: hidden !important;
    }

    .mcu-preview-tabs-wrap::-webkit-scrollbar {
        display: none !important;
    }

    .mcu-preview-tab-btn {
        flex: 1 1 0px !important;
        min-width: 0 !important;
        padding: 7px 4px !important;
        font-size: 11.5px !important;
        gap: 4px !important;
        justify-content: center !important;
        text-align: center !important;
        border-radius: 8px !important;
    }

    .mcu-preview-tab-btn i {
        font-size: 12.5px !important;
        flex-shrink: 0 !important;
    }
}

/* Mobile Fine-Tuning for Demo Preview Section */
@media (max-width: 576px) {
    #platform-preview.mcu-section {
        padding-top: 1.75rem !important;
        padding-bottom: 2rem !important;
    }

    #platform-preview .mcu-card {
        background: #FFFFFF !important;
        border: 1px solid #E2E8F0 !important;
        padding: 12px 10px !important;
        border-radius: 16px !important;
        box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05) !important;
    }

    #platform-preview .preview-pane .bg-white {
        background: transparent !important;
        border: none !important;
        padding: 0 !important;
        border-radius: 0 !important;
    }

    #platform-preview .preview-pane .bg-light.rounded-3 {
        background: #F8FAFC !important;
        border: 1px solid #E2E8F0 !important;
        padding: 10px 10px !important;
        border-radius: 12px !important;
    }

    #platform-preview .preview-pane h4 {
        font-size: 1.15rem !important;
    }

    #platform-preview .preview-pane .bg-light.rounded-3 h3 {
        font-size: 1.35rem !important;
    }

    #platform-preview .preview-pane .bg-light.rounded-3 span {
        font-size: 10px !important;
        white-space: nowrap !important;
    }
}

/* Section Keunggulan Mobile Ultra-Clean Horizontal Card Layout */
@media (max-width: 576px) {
    #features.mcu-section {
        padding-top: 1.5rem !important;
        padding-bottom: 1.5rem !important;
    }

    #features .text-center.mb-5,
    #features .text-center.mb-3,
    #features .text-center.mb-3.mb-md-5 {
        margin-bottom: 1.1rem !important;
    }

    #features .mcu-section-title {
        font-size: 1.3rem !important;
        line-height: 1.25 !important;
        margin-bottom: 0.35rem !important;
    }

    #features .mcu-section-subtitle {
        font-size: 0.84rem !important;
        line-height: 1.45 !important;
        margin-bottom: 0 !important;
    }

    #features .mcu-card {
        display: flex !important;
        flex-direction: row !important;
        align-items: flex-start !important;
        gap: 12px !important;
        text-align: left !important;
        padding: 12px 14px !important;
        border-radius: 12px !important;
        box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04) !important;
    }

    #features .mcu-card-icon {
        width: 36px !important;
        height: 36px !important;
        font-size: 18px !important;
        margin-bottom: 0 !important;
        border-radius: 9px !important;
        flex-shrink: 0 !important;
    }

    #features .mcu-card-content {
        flex: 1 !important;
        min-width: 0 !important;
    }

    #features .mcu-card h4 {
        font-size: 0.95rem !important;
        font-weight: 700 !important;
        line-height: 1.3 !important;
        margin-bottom: 2px !important;
        color: #0F172A !important;
    }

    #features .mcu-card p {
        font-size: 0.82rem !important;
        line-height: 1.45 !important;
        color: #64748B !important;
    }
}

/* ==========================================================================
   GLOBAL MOBILE FRIENDLY AUDIT & FINE-TUNING (MAX-WIDTH: 576PX)
   ========================================================================== */
@media (max-width: 576px) {

    /* Section Headings Global Responsive Sizing */
    .mcu-section-label {
        font-size: 11px !important;
        letter-spacing: 0.08em !important;
        padding: 4px 12px !important;
        margin-bottom: 8px !important;
    }

    .mcu-section-title {
        font-size: 1.4rem !important;
        line-height: 1.28 !important;
        margin-bottom: 0.5rem !important;
    }

    .mcu-section-subtitle {
        font-size: 0.88rem !important;
        line-height: 1.5 !important;
    }

    /* Section Spacing on Mobile */
    .mcu-section {
        padding-top: 2rem !important;
        padding-bottom: 2.25rem !important;
    }

    /* Section Steps (Alur Aktivasi Akun) Mobile Balanced Spacing */
    #steps.mcu-section {
        padding-top: 1.75rem !important;
        padding-bottom: 2rem !important;
    }

    #steps .text-center.mb-5,
    #steps .text-center.mb-3,
    #steps .text-center.mb-3.mb-md-5 {
        margin-bottom: 1.5rem !important;
    }

    #steps .mcu-section-title {
        font-size: 1.35rem !important;
        line-height: 1.28 !important;
        margin-bottom: 0.4rem !important;
    }

    #steps .mcu-section-subtitle {
        font-size: 0.86rem !important;
        line-height: 1.48 !important;
        margin-bottom: 0 !important;
    }

    #steps .mcu-card {
        padding: 14px 16px !important;
        border-radius: 14px !important;
    }

    #steps .mcu-card .d-flex.mb-3 {
        margin-bottom: 10px !important;
    }

    #steps .mcu-step-number {
        width: 34px !important;
        height: 34px !important;
        font-size: 13.5px !important;
        border-radius: 9px !important;
    }

    #steps .mcu-card .rounded-3[style*="width: 40px"] {
        width: 34px !important;
        height: 34px !important;
        font-size: 15px !important;
        border-radius: 9px !important;
    }

    #steps .mcu-card h5 {
        font-size: 0.98rem !important;
        font-weight: 700 !important;
        margin-bottom: 3px !important;
    }

    #steps .mcu-card p {
        font-size: 0.82rem !important;
        line-height: 1.45 !important;
        color: #64748B !important;
    }

    /* Pricing Mobile Tab Switcher Style */
    .mcu-pricing-tab-btn {
        color: #64748B !important;
        transition: all 0.25s ease !important;
    }

    .mcu-pricing-tab-btn.active {
        background-color: var(--mcu-primary) !important;
        color: #FFFFFF !important;
        box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3) !important;
    }

    /* Pricing Section Cards Mobile Compact Fine-Tuning */
    #pricing.mcu-section {
        padding-top: 1.5rem !important;
        padding-bottom: 1.75rem !important;
    }

    #pricing .text-center.mb-5,
    #pricing .text-center.mb-4.mb-md-5 {
        margin-bottom: 1.25rem !important;
    }

    #pricing .mcu-section-title {
        font-size: 1.3rem !important;
        line-height: 1.25 !important;
        margin-bottom: 0.35rem !important;
    }

    #pricing .mcu-section-subtitle {
        font-size: 0.84rem !important;
        line-height: 1.45 !important;
    }

    #pricing .mcu-card {
        padding: 14px 16px !important;
        border-radius: 14px !important;
    }

    #pricing .mcu-card .badge {
        font-size: 10px !important;
        padding: 3px 10px !important;
        margin-bottom: 6px !important;
    }

    #pricing .mcu-card h4 {
        font-size: 1.08rem !important;
        margin-bottom: 4px !important;
    }

    #pricing .mcu-card p.text-muted.small {
        font-size: 0.78rem !important;
        line-height: 1.4 !important;
        margin-bottom: 10px !important;
    }

    #pricing .mcu-card .mb-4.pt-2 {
        margin-bottom: 10px !important;
        padding-top: 0 !important;
    }

    #pricing .mcu-card h3.fw-extrabold {
        font-size: 1.45rem !important;
        line-height: 1.1 !important;
    }

    #pricing .mcu-card span.text-muted.small.fw-semibold {
        font-size: 0.75rem !important;
    }

    #pricing .mcu-card ul {
        margin-bottom: 12px !important;
    }

    #pricing .mcu-card ul li {
        font-size: 0.78rem !important;
        margin-bottom: 4px !important;
    }

    #pricing .mcu-card ul li i {
        font-size: 0.85rem !important;
    }

    #pricing .mcu-card a.btn {
        padding: 8px 12px !important;
        font-size: 13px !important;
        border-radius: 8px !important;
    }

    /* Testimonial Cards Mobile Fine-Tuning */
    .mcu-testimonial-card {
        padding: 1.25rem 1.15rem !important;
        border-radius: 14px !important;
    }

    .mcu-testimonial-card p {
        font-size: 0.86rem !important;
        line-height: 1.5 !important;
    }

    /* FAQ Accordion Mobile Fine-Tuning */
    #faq .mcu-section-title {
        font-size: 1.35rem !important;
        margin-bottom: 0.35rem !important;
    }

    #faq .mcu-section-subtitle {
        font-size: 0.82rem !important;
        line-height: 1.5 !important;
        margin-bottom: 0.75rem !important;
    }

    .mcu-accordion-item {
        margin-bottom: 8px !important;
        border-radius: 10px !important;
    }

    .mcu-accordion-button {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        width: 100% !important;
        font-size: 0.88rem !important;
        font-weight: 600 !important;
        padding: 10px 14px !important;
        line-height: 1.4 !important;
        text-align: left !important;
    }

    .mcu-accordion-button::after {
        background-size: 0.85rem !important;
        margin-left: auto !important;
        flex-shrink: 0 !important;
    }

    .mcu-accordion-body {
        font-size: 0.83rem !important;
        padding: 0 14px 12px 14px !important;
        line-height: 1.55 !important;
    }

    .mcu-accordion-body .btn-sm {
        padding: 6px 12px !important;
        font-size: 12px !important;
    }

    /* Footer Mobile Fine-Tuning */
    footer.mcu-footer {
        padding-top: 2.5rem !important;
        padding-bottom: 2rem !important;
    }
}

/* ==========================================================================
   MCUApps V2 Authenticated Dashboard App Shell & UI Redesign
   ========================================================================== */
.mcu-app-shell {
    display: flex;
    min-height: 100vh;
    background-color: #F8FAFC;
    color: #0F172A;
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

/* Sidebar Styling */
.mcu-sidebar {
    width: 250px;
    background-color: #FFFFFF;
    border-right: 1px solid #E2E8F0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1030;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 1px 0 10px rgba(0, 0, 0, 0.02);
}

.mcu-sidebar.collapsed {
    width: 72px;
}

.sidebar-text, .sidebar-profile-info, .sidebar-badge, .mcu-nav-label {
    transition: opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1), max-width 0.25s cubic-bezier(0.4, 0, 0.2, 1), margin 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    opacity: 1;
    max-width: 200px;
    overflow: hidden;
}

.mcu-sidebar.collapsed .sidebar-text,
.mcu-sidebar.collapsed .sidebar-profile-info,
.mcu-sidebar.collapsed .sidebar-badge,
.mcu-sidebar.collapsed .mcu-nav-label {
    opacity: 0 !important;
    max-width: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    pointer-events: none;
    border: none !important;
}

.mcu-sidebar.collapsed .sidebar-full-logo {
    display: none !important;
}

.mcu-sidebar.collapsed .sidebar-icon-logo {
    display: block !important;
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.mcu-sidebar.collapsed .mcu-sidebar-header {
    justify-content: space-between !important;
    padding: 0 10px !important;
}

.mcu-sidebar.collapsed .mcu-sidebar-toggle {
    display: flex !important;
}

.mcu-sidebar.collapsed .sidebar-profile {
    justify-content: center !important;
    padding: 6px 0 !important;
    margin: 12px auto !important;
    width: 46px !important;
    background: transparent !important;
    border: none !important;
}

.mcu-sidebar.collapsed .mcu-nav-item {
    justify-content: center !important;
    padding: 0 !important;
    margin: 2px auto !important;
    gap: 0 !important;
    width: 44px;
    height: 44px;
}

.mcu-sidebar.collapsed .mcu-nav-item i {
    font-size: 1.25rem !important;
    margin-right: 0 !important;
}

/* Sidebar Brand Header */
.mcu-sidebar-header {
    height: 64px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #F1F5F9;
}

.mcu-sidebar-logo {
    height: 32px;
    object-fit: contain;
}

.mcu-sidebar-toggle {
    background: transparent;
    border: none;
    color: #64748B;
    font-size: 1.25rem;
    padding: 4px 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.mcu-sidebar-toggle:hover {
    background: #F1F5F9;
    color: #1E293B;
}

/* Sidebar Profile Box */
.sidebar-profile {
    padding: 14px 16px;
    margin: 12px 12px 8px 12px;
    background: #F8FAFC;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 1.5px solid #2563EB;
    flex-shrink: 0;
}

.sidebar-profile-info {
    overflow: hidden;
}

.sidebar-name {
    font-size: 13px;
    font-weight: 700;
    color: #0F172A;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 1px;
}

.sidebar-app-name {
    font-size: 11px;
    color: #2563EB;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Navigation Links */
.mcu-sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
}

.mcu-nav-label {
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94A3B8;
    padding: 12px 12px 6px 12px;
}

.mcu-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 9.5px 12px;
    color: #475569;
    font-size: 13.5px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 10px;
    margin-bottom: 2px;
    transition: all 0.15s ease-in-out;
}

.mcu-nav-item i {
    font-size: 1.1rem;
    color: #64748B;
    transition: color 0.15s ease;
    flex-shrink: 0;
}

.mcu-nav-item:hover {
    background-color: #F1F5F9;
    color: #1E293B;
}

.mcu-nav-item:hover i {
    color: #2563EB;
}

.mcu-nav-item.active {
    background-color: #EFF6FF;
    color: #1D4ED8;
    font-weight: 600;
}

.mcu-nav-item.active i {
    color: #2563EB;
}

.mcu-nav-item.disabled {
    opacity: 0.65;
    cursor: not-allowed;
    pointer-events: none;
}

/* App Main Wrapper */
.mcu-app-main {
    flex: 1;
    margin-left: 250px;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.mcu-app-shell.sidebar-collapsed .mcu-app-main {
    margin-left: 72px;
}

/* Topbar Styling (Glassmorphism Sticky) */
.mcu-topbar {
    height: 64px;
    background: rgba(255, 255, 255, 0.78) !important;
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8) !important;
    box-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.05);
    position: sticky;
    top: 0;
    z-index: 1020;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.mcu-topbar-breadcrumb {
    font-size: 14px;
    font-weight: 700;
    color: #0F172A;
}

/* Cards & Sections — LUXURY HIGH-END SPECIFICATION */
.mcu-welcome-panel {
    background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 35%, #1E3A8A 70%, #2563EB 100%) !important;
    border-radius: 20px !important;
    color: #FFFFFF;
    padding: 30px 36px;
    box-shadow: 0 20px 40px -10px rgba(30, 58, 138, 0.4), 0 8px 16px -4px rgba(15, 23, 42, 0.2) !important;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.15) !important;
}

.mcu-welcome-panel::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.35) 0%, rgba(37, 99, 235, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
}

.mcu-dashboard-card,
.mcu-card {
    background: #FFFFFF !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    border-radius: 18px !important;
    padding: 20px;
    box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.03), 0 2px 6px -1px rgba(15, 23, 42, 0.02) !important;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.mcu-dashboard-card:hover,
.mcu-card:hover {
    transform: translateY(-4px) !important;
    box-shadow: 0 16px 36px -4px rgba(37, 99, 235, 0.12), 0 4px 12px -2px rgba(15, 23, 42, 0.04) !important;
    border-color: rgba(37, 99, 235, 0.3) !important;
}

.mcu-stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px !important;
    background: #EFF6FF;
    color: #2563EB;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.mcu-book-thumb-container {
    aspect-ratio: 3 / 4;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #F1F5F9 0%, #E2E8F0 100%);
    border-radius: 12px;
}

.mcu-book-thumb-container img {
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

@media (min-width: 768px) {
    .mcu-book-thumb-container {
        aspect-ratio: 3 / 4;
    }
}

/* Dashboard Layout & Responsive Section Ordering */
.mcu-dashboard-view {
    width: 100%;
    max-width: 1440px;
    margin-inline: auto;
}

@media (min-width: 992px) {
    .mcu-dashboard-grid {
        display: grid;
        grid-template-columns: minmax(0, 2fr) minmax(320px, 0.95fr);
        gap: 28px;
        align-items: stretch;
    }
}

@media (max-width: 991.98px) {
    .mcu-dashboard-grid {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }

    .mcu-section-pustaka {
        order: 1;
    }

    .mcu-section-ringkasan {
        order: 2;
    }

    .mcu-section-rekomendasi {
        order: 3;
    }

    .mcu-section-pemberitahuan {
        order: 4;
    }
}

.mcu-menu-card {
    min-height: 90px;
}

.mcu-dashboard-view .mcu-book-thumb-container {
    aspect-ratio: 4 / 3 !important;
}

.mcu-notification-item-link {
    padding: 14px 16px !important;
}

.mcu-notification-item-link:hover {
    background: #F8FAFC !important;
}

/* Custom Scrollbar for Sidebar Navigation */
.mcu-sidebar {
    height: 100dvh;
    overflow: hidden;
}

.mcu-sidebar-nav {
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: #CBD5E1 transparent;
}

.mcu-sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.mcu-sidebar-nav::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}

.mcu-sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

/* Global Layout Overflow Fix */
html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

.mcu-app-shell {
    display: flex;
    min-height: 100vh;
    background-color: #F8FAFC;
    overflow-x: hidden;
}

/* Mobile-First Bottom Navigation Bar & Mobile App Shell */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1050;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
    padding: 6px 12px calc(6px + env(safe-area-inset-bottom, 0px));
}

.mobile-bottom-nav-inner {
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 500px;
    margin: 0 auto;
}

.mobile-bottom-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #64748B;
    font-size: 11px;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 12px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 56px;
    min-height: 44px;
}

.mobile-bottom-nav .nav-icon {
    font-size: 1.25rem;
    margin-bottom: 2px;
    transition: transform 0.2s ease, color 0.2s ease;
}

.mobile-bottom-nav .nav-item.active {
    color: #2563EB;
    font-weight: 700;
}

.mobile-bottom-nav .nav-item.active .nav-icon {
    transform: translateY(-1px) scale(1.1);
    color: #2563EB;
}

.mobile-bottom-nav .nav-item:active {
    transform: scale(0.92);
}

/* Mobile Responsiveness Media Queries */
@media (max-width: 991.98px) {
    body {
        padding-bottom: 80px !important;
    }

    .mcu-sidebar,
    aside.mcu-sidebar,
    .mcu-sidebar.collapsed {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        bottom: 0 !important;
        z-index: 1060 !important;
        transform: translateX(-100%) !important;
        width: 280px !important;
        max-width: 85vw !important;
        box-shadow: 6px 0 28px rgba(15, 23, 42, 0.25) !important;
        transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
        overflow-y: auto !important;
    }

    .mcu-sidebar-nav {
        padding-bottom: 90px !important;
    }

    .mcu-sidebar.mobile-open,
    aside.mcu-sidebar.mobile-open {
        transform: translateX(0) !important;
    }

    /* Force full expanded elements inside mobile sidebar drawer even if desktop was collapsed */
    .mcu-sidebar.collapsed .sidebar-text,
    .mcu-sidebar.collapsed .sidebar-profile-info,
    .mcu-sidebar.collapsed .sidebar-badge,
    .mcu-sidebar.collapsed .mcu-nav-label {
        opacity: 1 !important;
        max-width: 250px !important;
        pointer-events: auto;
    }

    .mcu-sidebar.collapsed .sidebar-full-logo {
        display: block !important;
    }

    .mcu-sidebar.collapsed .sidebar-icon-logo {
        display: none !important;
    }

    .mcu-sidebar.collapsed .sidebar-profile {
        justify-content: flex-start !important;
        padding: 10px 14px !important;
        margin: 12px 14px !important;
        width: auto !important;
        background: #F8FAFC !important;
        border: 1px solid #E2E8F0 !important;
        border-radius: 14px !important;
    }

    .mcu-sidebar.collapsed .mcu-nav-item {
        justify-content: flex-start !important;
        padding: 10px 14px !important;
        margin: 3px 14px !important;
        text-align: left !important;
    }

    .mcu-sidebar.collapsed .mcu-nav-item i {
        margin-right: 12px !important;
        font-size: 1.2rem !important;
    }

    .mcu-app-main {
        margin-left: 0 !important;
        width: 100% !important;
    }

    .mcu-topbar {
        padding: 0 16px;
    }

    .mcu-sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.45);
        backdrop-filter: blur(4px);
        z-index: 1055 !important;
        display: none;
    }

    .mcu-sidebar-backdrop.show {
        display: block;
    }

    .mcu-welcome-panel {
        padding: 20px 20px !important;
    }
}

/* MCUApps AI Help Center Overhaul Styles */
.mcu-help-center-view .mcu-ai-content ul {
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
}

.mcu-help-center-view .mcu-ai-content li {
    margin-bottom: 0.25rem;
    line-height: 1.5;
}

.mcu-help-center-view .hover-border-primary:hover {
    border-color: #2563EB !important;
    background-color: #F8FAFC !important;
}

.mcu-help-center-view .shadow-2xs {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.max-width-1280,
.max-width-1440 {
    max-width: 1440px !important;
    width: 100% !important;
    margin: 0 auto !important;
}

@media (max-width: 991.98px) {

    .mcu-help-center-view #chatBox,
    .mcu-ai-support-view #chatBoxSupport {
        max-height: 420px !important;
        min-height: 320px !important;
    }
}

/* Global Mobile & Desktop Responsive Optimization */
html,
body {
    overflow-x: hidden;
}

@media (max-width: 575.98px) {
    .mcu-welcome-panel {
        padding: 18px 16px !important;
    }

    .mcu-dashboard-card {
        padding: 16px !important;
        border-radius: 14px !important;
    }

    .mcu-nav-item {
        padding: 10px 14px !important;
    }

    .btn-sm {
        min-height: 38px;
    }
}

/* MCU Notifications UI/UX Overhaul */
.mcu-notification-item {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #E2E8F0;
    text-decoration: none !important;
    transition: all 0.2s ease;
}

.mcu-notification-item.unread {
    background-color: #EFF6FF !important;
    border-left: 4px solid #2563EB !important;
}

.mcu-notification-item.read {
    background-color: #FFFFFF !important;
    border-left: 4px solid transparent !important;
}

.mcu-notification-item:hover {
    background-color: #F8FAFC !important;
}

.mcu-notification-item .notif-icon {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 18px;
}

.mcu-notification-item .notif-title {
    color: #0F172A;
    font-weight: 700;
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 3px;
}

.mcu-notification-item .notif-desc {
    color: #475569;
    font-size: 13px;
    line-height: 1.5;
    margin-bottom: 6px;
}

.mcu-notification-item .notif-time {
    color: #64748B;
    font-size: 11.5px;
    font-weight: 500;
    white-space: nowrap;
}

/* Notification Rich Body Content in Detail View */
.notification-body-content {
    color: #1E293B !important;
    font-size: 15px !important;
    line-height: 1.7 !important;
    word-break: break-word !important;
}

.notification-body-content p {
    color: #334155 !important;
    margin-bottom: 1rem !important;
}

.notification-body-content h1,
.notification-body-content h2,
.notification-body-content h3,
.notification-body-content h4 {
    color: #0F172A !important;
    font-weight: 700 !important;
    margin-top: 1.25rem !important;
    margin-bottom: 0.75rem !important;
}

.notification-body-content ul,
.notification-body-content ol {
    padding-left: 1.5rem !important;
    margin-bottom: 1rem !important;
    color: #334155 !important;
}

.notification-body-content li {
    margin-bottom: 0.35rem !important;
}

.notification-body-content a {
    color: #2563EB !important;
    text-decoration: underline !important;
    font-weight: 600 !important;
}

.notification-body-content img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: 12px !important;
    margin: 1rem 0 !important;
}

.mcu-book-thumb-container {
    aspect-ratio: 3 / 4;
}

/* TOC Masonry Auto Fill Layout */
.mcu-toc-masonry {
    column-count: 2;
    column-gap: 2rem;
    display: block;
}

.mcu-toc-masonry-block {
    break-inside: avoid;
    page-break-inside: avoid;
    display: inline-block;
    margin-bottom: 2rem;
    width: 100%;
    vertical-align: top;
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
}

.mcu-toc-masonry-block .mcu-toc-item-h1 {
    background: #EFF6FF;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 10px 14px;
    margin-top: 0.5rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.mcu-toc-masonry-block .mcu-toc-item-h2 {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 10px 14px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.mcu-toc-masonry-block .mcu-toc-item-h2:last-child {
    margin-bottom: 0;
}

.mcu-toc-page-badge {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-width: 62px !important;
    max-width: 62px !important;
    width: 62px !important;
    text-align: center !important;
    font-size: 11px !important;
    font-weight: 700 !important;
    color: #2563EB !important;
    background-color: #EFF6FF !important;
    border-radius: 50px !important;
    padding: 3px 6px !important;
    flex-shrink: 0 !important;
}

.mcu-cbm-btn {
    width: 34px !important;
    height: 34px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
    background-color: transparent !important;
}

.mcu-cbm-btn:hover {
    transform: scale(1.1) !important;
    box-shadow: none !important;
    background-color: rgba(0, 0, 0, 0.05) !important;
    border-radius: 8px !important;
}

.mcu-cbm-btn:active {
    transform: scale(0.9) !important;
}

.mcu-cbm-btn i {
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
}

.mcu-cbm-btn i.bi-bookmark-star-fill {
    animation: bookmarkPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes bookmarkPop {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.35); }
    100% { transform: scale(1); }
}

.mcu-toc-icon-box {
    width: 30px !important;
    height: 30px !important;
    min-width: 30px !important;
    max-width: 30px !important;
    border-radius: 8px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
    font-size: 14px !important;
    margin-right: 14px !important;
}

@media (max-width: 767.98px) {
    .mcu-toc-masonry {
        column-count: 1;
    }
}

@media (max-width: 575.98px) {
    .mcu-book-thumb-container {
        aspect-ratio: 4 / 5 !important;
    }

    .mcu-dashboard-view .mcu-book-thumb-container {
        aspect-ratio: 4 / 3 !important;
    }

    .mcu-notification-item {
        padding: 0.85rem 0.85rem !important;
        gap: 0.65rem !important;
    }

    .mcu-notification-item .notif-icon {
        width: 36px !important;
        height: 36px !important;
        font-size: 16px !important;
    }

    .mcu-notification-item .notif-title {
        font-size: 13px !important;
    }

    .mcu-notification-item .notif-desc {
        font-size: 12px !important;
    }
}

/* AI SUPPORT FLOATING CIRCULAR LOGO BUTTON & SPEECH BUBBLE */
.mcu-ai-cta-widget {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1050;
    opacity: 0.85;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.mcu-ai-cta-widget:hover {
    opacity: 1;
}

/* Circular Logo Button */
.mcu-ai-circle-btn {
    width: 58px;
    height: 58px;
    background: linear-gradient(135deg, rgba(30, 27, 75, 0.9) 0%, rgba(37, 99, 235, 0.9) 100%);
    border: 2px solid rgba(255, 255, 255, 0.35);
    box-shadow: 0 10px 25px -4px rgba(37, 99, 235, 0.4), 0 8px 12px -6px rgba(30, 27, 75, 0.3);
    backdrop-filter: blur(8px);
    transition: transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.25s ease, background 0.25s ease;
}

.mcu-ai-circle-btn:hover {
    background: linear-gradient(135deg, #1E1B4B 0%, #2563EB 100%);
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 14px 28px -4px rgba(37, 99, 235, 0.6), 0 10px 14px -6px rgba(30, 27, 75, 0.4);
}

.mcu-ai-cta-pulse {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 12px;
    height: 12px;
    background-color: #10B981;
    border: 2px solid #1E1B4B;
    border-radius: 50%;
    animation: mcuPulseRing 2s infinite;
}

@keyframes mcuPulseRing {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }

    70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* Speech Bubble Tooltip */
.mcu-ai-speech-bubble {
    background: rgba(255, 255, 255, 0.92);
    color: #1E293B;
    padding: 7px 12px 7px 14px;
    border-radius: 16px;
    border: 1px solid rgba(226, 232, 240, 0.9);
    box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.12);
    backdrop-filter: blur(8px);
    animation: mcuFloatBubble 3s ease-in-out infinite;
    transition: opacity 0.25s ease, transform 0.25s ease;
    white-space: nowrap;
}

.mcu-ai-speech-bubble .bubble-arrow {
    position: absolute;
    bottom: -6px;
    right: 22px;
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.92);
    border-right: 1px solid rgba(226, 232, 240, 0.9);
    border-bottom: 1px solid rgba(226, 232, 240, 0.9);
    transform: rotate(45deg);
}

.mcu-ai-speech-bubble .btn-close-bubble {
    background: none;
    border: none;
    padding: 0;
    color: #94A3B8;
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    transition: color 0.15s ease;
}

.mcu-ai-speech-bubble .btn-close-bubble:hover {
    color: #EF4444;
}

.bubble-sparkle {
    font-size: 13px;
    animation: mcuTwinkle 1.5s ease-in-out infinite alternate;
}

@keyframes mcuFloatBubble {

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

    50% {
        transform: translateY(-5px);
    }
}

@keyframes mcuTwinkle {
    0% {
        opacity: 0.6;
        transform: scale(0.9);
    }

    100% {
        opacity: 1;
        transform: scale(1.15);
    }
}

@media (max-width: 991.98px) {
    .mcu-ai-cta-widget {
        bottom: 76px !important;
        right: 16px !important;
    }

    .mcu-ai-circle-btn {
        width: 52px;
        height: 52px;
    }

    .mcu-ai-circle-btn i {
        font-size: 1.4rem !important;
    }

    .mcu-ai-speech-bubble {
        padding: 6px 10px;
        font-size: 12px;
    }

    .mcu-ai-speech-bubble .bubble-arrow {
        right: 18px;
    }
}



/* AI SUPPORT POPUP WINDOW & MOBILE DRAWER STYLES */
.mcu-ai-popup-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1055;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    max-height: calc(100vh - 36px);
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.mcu-ai-popup-window {
    width: 380px;
    max-width: calc(100vw - 32px);
    max-height: min(540px, calc(100vh - 48px));
    display: flex;
    flex-direction: column;
    background: #FFFFFF;
    border: 1px solid #E2E8F0 !important;
    box-shadow: 0 20px 45px -10px rgba(15, 23, 42, 0.25), 0 10px 20px -5px rgba(30, 27, 75, 0.15) !important;
    overflow: hidden !important;
}

.mcu-ai-popup-header {
    flex-shrink: 0;
    padding: 12px 16px !important;
}

.mcu-ai-popup-footer {
    flex-shrink: 0;
}

#mcuAiPopupBody {
    flex: 1 1 auto;
    height: auto !important;
    max-height: 380px;
    min-height: 180px;
    overflow-x: hidden !important;
    overflow-y: auto !important;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.mcu-ai-popup-window * {
    max-width: 100%;
}

body.mcu-ai-popup-open .mcu-ai-cta-widget {
    display: none !important;
}

/* Biography Expand / Collapse Clamping */
.mcu-bio-preview {
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

/* Seamless Reader SPA Transitions & Zero-Flash Preloader */
.mcu-reading-wrapper {
    transition: opacity 0.18s ease-in-out;
}

.mcu-reading-wrapper.mcu-page-loading {
    opacity: 0.45;
    pointer-events: none;
}

#mcu-reader-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3.5px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa, #93c5fd);
    z-index: 99999;
    width: 0%;
    transition: width 0.2s ease, opacity 0.3s ease;
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.85);
    border-radius: 0 4px 4px 0;
}

/* Image Lightbox Zoom Modal */
.mcu-reading-paper-content img {
    cursor: zoom-in !important;
    transition: transform 0.25s ease, box-shadow 0.25s ease !important;
    border-radius: 8px !important;
}

.mcu-reading-paper-content img:hover {
    transform: scale(1.02) !important;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.14) !important;
}

.mcu-image-lightbox {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: rgba(255, 255, 255, 0.65) !important;
    backdrop-filter: blur(12px) saturate(160%) !important;
    -webkit-backdrop-filter: blur(12px) saturate(160%) !important;
    z-index: 99999 !important;
    display: none;
    align-items: center !important;
    justify-content: center !important;
    padding: 1.5rem !important;
}

.mcu-image-lightbox.active {
    display: flex !important;
}

.mcu-lightbox-content {
    position: relative !important;
    max-width: 92vw !important;
    max-height: 90vh !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
}

.mcu-lightbox-close {
    position: absolute !important;
    top: -48px !important;
    right: 0 !important;
    width: 40px !important;
    height: 40px !important;
    background: #1E293B !important;
    color: #FFFFFF !important;
    border: 1px solid rgba(255, 255, 255, 0.5) !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 18px !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    z-index: 100000 !important;
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.25) !important;
}

.mcu-lightbox-close:hover {
    background: #EF4444 !important;
    color: #FFFFFF !important;
    border-color: #EF4444 !important;
    transform: scale(1.1) !important;
}

.mcu-lightbox-img-wrapper {
    overflow: auto !important;
    max-width: 100% !important;
    max-height: 82vh !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.mcu-lightbox-img {
    max-width: 100% !important;
    max-height: 82vh !important;
    object-fit: contain !important;
    border-radius: 12px !important;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.18) !important;
    background: #FFFFFF !important;
    transition: transform 0.25s ease !important;
}

.mcu-lightbox-caption {
    color: #1E293B !important;
    font-size: 13.5px !important;
    font-weight: 700 !important;
    margin-top: 12px !important;
    text-align: center !important;
    font-family: 'Plus Jakarta Sans', sans-serif !important;
}

@media (max-width: 576px) {
    .mcu-lightbox-close {
        top: -44px !important;
        right: -2px !important;
        width: 36px !important;
        height: 36px !important;
        font-size: 16px !important;
    }
}

@media (max-width: 575.98px) {
    .mcu-ai-popup-container {
        bottom: 0 !important;
        right: 0 !important;
        left: 0 !important;
        width: 100% !important;
        z-index: 1060 !important;
    }

    .mcu-ai-popup-window {
        width: 100% !important;
        height: 82vh !important;
        max-height: 82vh !important;
        border-radius: 24px 24px 0 0 !important;
        border-bottom: none !important;
    }

    #mcuAiPopupBody {
        height: calc(82vh - 120px) !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
    }
}

/* Universal MCU Zero-Flash Theme Foundation */
html {
    background-color: #F8FAFC !important;
    /* Prevents browser white flash void */
}

body {
    background-color: #F8FAFC !important;
}

#book-content,
#mcu-app-body,
.mcu-app-main,
#book-layout {
    transition: opacity 0.16s ease-in-out !important;
}

.mcu-page-loading-state {
    opacity: 0.75 !important;
}

/* Prominent & Non-Truncated Material Titles */
.mcu-book-title {
    font-size: 14.5px !important;
    font-weight: 800 !important;
    line-height: 1.38 !important;
    letter-spacing: -0.01em !important;
    color: #0F172A !important;
    word-break: break-word !important;
    white-space: normal !important;
    display: block !important;
    overflow: visible !important;
    height: auto !important;
    max-height: none !important;
    -webkit-line-clamp: unset !important;
    text-align: center !important;
}

@media (max-width: 576px) {
    .mcu-book-title {
        font-size: 13.5px !important;
        line-height: 1.35 !important;
    }
}