:root {
            --primary-color: #1E293B;
            --secondary-color: #0F172A;
            --accent-color: #F59E0B;
            --accent-hover: #D97706;
            --support-accent: #10B981;
            --support-hover: #059669;
            --danger-color: #EF4444;
            --warning-color: #F59E0B;
            --info-color: #3B82F6;
            --bg-main: #F9FAFB;
            --bg-card: #FFFFFF;
            --bg-section: #FFFFFF;
            --text-heading: #111827;
            --text-body: #374151;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --border-color: #E5E7EB;
            --border-light: #F3F4F6;
            
            --dark-primary-color: #F9FAFB;
            --dark-secondary-color: #E5E7EB;
            --dark-accent-color: #F59E0B;
            --dark-accent-hover: #D97706;
            --dark-support-accent: #10B981;
            --dark-support-hover: #059669;
            --dark-danger-color: #EF4444;
            --dark-warning-color: #F59E0B;
            --dark-info-color: #3B82F6;
            --dark-bg-main: #0F172A;
            --dark-bg-card: #1E293B;
            --dark-bg-section: #1E293B;
            --dark-text-heading: #F9FAFB;
            --dark-text-body: #D1D5DB;
            --dark-text-muted: #9CA3AF;
            --dark-text-light: #6B7280;
            --dark-border-color: #334155;
            --dark-border-light: #1E293B;
            
            --font-heading: 'Playfair Display', serif;
            --font-body: 'Inter', sans-serif;
            
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            --spacing-3xl: 4rem;
            --spacing-section-desktop: 100px;
            --spacing-section-mobile: 60px;
            
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --radius-full: 9999px;
            
            --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            
            --dark-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
            --dark-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
            --dark-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
            --dark-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
            --dark-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
            --dark-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
            
            --transition-fast: 150ms ease;
            --transition-normal: 250ms ease;
            --transition-slow: 350ms ease;
            
            --z-dropdown: 1000;
            --z-sticky: 1020;
            --z-fixed: 1030;
            --z-modal-backdrop: 1040;
            --z-modal: 1050;
            --z-popover: 1060;
            --z-tooltip: 1070;
            --z-toast: 1080;
        }

        body.dark-theme {
            --primary-color: var(--dark-primary-color);
            --secondary-color: var(--dark-secondary-color);
            --accent-color: var(--dark-accent-color);
            --accent-hover: var(--dark-accent-hover);
            --support-accent: var(--dark-support-accent);
            --support-hover: var(--dark-support-hover);
            --danger-color: var(--dark-danger-color);
            --warning-color: var(--dark-warning-color);
            --info-color: var(--dark-info-color);
            --bg-main: var(--dark-bg-main);
            --bg-card: var(--dark-bg-card);
            --bg-section: var(--dark-bg-section);
            --text-heading: var(--dark-text-heading);
            --text-body: var(--dark-text-body);
            --text-muted: var(--dark-text-muted);
            --text-light: var(--dark-text-light);
            --border-color: var(--dark-border-color);
            --border-light: var(--dark-border-light);
            --shadow-xs: var(--dark-shadow-xs);
            --shadow-sm: var(--dark-shadow-sm);
            --shadow-md: var(--dark-shadow-md);
            --shadow-lg: var(--dark-shadow-lg);
            --shadow-xl: var(--dark-shadow-xl);
            --shadow-2xl: var(--dark-shadow-2xl);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.6;
            color: var(--text-body);
            background-color: var(--bg-main);
            overflow-x: hidden;
            transition: background-color var(--transition-normal), color var(--transition-normal);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: var(--spacing-lg);
            color: var(--text-heading);
            letter-spacing: -0.025em;
        }

        h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 900;
            line-height: 1.1;
        }

        h2 {
            font-size: clamp(2rem, 4vw, 3rem);
        }

        h3 {
            font-size: clamp(1.5rem, 3vw, 2rem);
        }

        h4 {
            font-size: clamp(1.25rem, 2.5vw, 1.5rem);
        }

        p {
            margin-bottom: var(--spacing-lg);
            max-width: 700px;
            color: var(--text-body);
        }

      
        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: color var(--transition-fast);
            font-weight: 500;
        }

        a:hover {
            color: var(--accent-hover);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        .container-sm {
            max-width: 640px;
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        .section {
            padding: var(--spacing-section-desktop) 0;
            position: relative;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-3xl);
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-title {
            font-size: clamp(2rem, 4vw, 3rem);
            margin-bottom: var(--spacing-md);
            color: var(--text-heading);
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-color), var(--support-accent));
            border-radius: var(--radius-full);
        }

        .section-subtitle {
            font-size: 1.25rem;
            color: var(--text-muted);
            font-weight: 400;
            margin-top: var(--spacing-lg);
        }

        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: var(--z-fixed);
            transition: all var(--transition-normal);
            border-bottom: 1px solid transparent;
        }

        body.dark-theme .navbar {
            background-color: rgba(15, 23, 42, 0.9);
        }

        .navbar.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-lg);
            border-bottom-color: var(--border-color);
        }

        body.dark-theme .navbar.scrolled {
            background-color: rgba(15, 23, 42, 0.98);
        }

        .navbar-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-md) 0;
        }

        .navbar-logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-heading);
            text-decoration: none;
            transition: transform var(--transition-fast);
        }

        .navbar-logo:hover {
            transform: scale(1.05);
        }

        .navbar-logo i {
            color: var(--accent-color);
            font-size: 1.75rem;
        }

        .navbar-menu {
            display: flex;
            list-style: none;
            gap: var(--spacing-xl);
        }

        .navbar-link {
            font-weight: 600;
            color: var(--text-body);
            position: relative;
            padding: var(--spacing-sm) 0;
            transition: color var(--transition-fast);
            font-size: 0.95rem;
        }

        .navbar-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: width var(--transition-normal);
        }

        .navbar-link:hover::after,
        .navbar-link.active::after {
            width: 100%;
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }

        .theme-toggle,
        .mobile-menu-toggle {
            background: none;
            border: none;
            color: var(--text-body);
            font-size: 1.25rem;
            cursor: pointer;
            padding: var(--spacing-sm);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover,
        .mobile-menu-toggle:hover {
            background-color: var(--bg-section);
            transform: scale(1.1);
        }

        .mobile-menu-toggle {
            display: none;
        }

        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: var(--z-modal-backdrop);
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition-normal);
        }

        .mobile-nav-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-sm);
            padding: var(--spacing-md) var(--spacing-xl);
            font-family: var(--font-body);
            font-weight: 600;
            font-size: 1rem;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
            vertical-align: middle;
            cursor: pointer;
            user-select: none;
            border: 2px solid transparent;
            border-radius: var(--radius-full);
            transition: all var(--transition-normal);
            text-decoration: none;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .btn:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.3);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .btn-primary {
            color: rgba(47, 0, 255, 0.423);
            background-color: green;
            border-color: var(--accent-color);
        }

        .btn-primary:hover:not(:disabled) {
            background-color: goldenrod;
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-secondary {
            color: var(--text-body);
            background-color: var(--bg-card);
            border-color: var(--border-color);
        }

        .btn-secondary:hover:not(:disabled) {
            background-color: var(--bg-section);
            border-color: var(--text-muted);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-accent {
            color: white;
            background-color: var(--support-accent);
            border-color: var(--support-accent);
        }

        .btn-accent:hover:not(:disabled) {
            background-color: var(--support-hover);
            border-color: var(--support-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-outline {
            color: var(--accent-color);
            background-color: transparent;
            border-color: var(--accent-color);
        }

        .btn-outline:hover:not(:disabled) {
            color: white;
            background-color: var(--accent-color);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-block {
            width: 100%;
        }

        .btn-lg {
            padding: var(--spacing-lg) var(--spacing-2xl);
            font-size: 1.125rem;
        }

        .btn-sm {
            padding: var(--spacing-sm) var(--spacing-lg);
            font-size: 0.875rem;
        }

        .hero {
            padding: calc(100px + var(--spacing-section-desktop)) 0 var(--spacing-section-desktop);
            background: linear-gradient(135deg, var(--secondary-color) 0%, #1E293B 50%, #334155 100%);
            position: relative;
            overflow: hidden;
        }

        body.dark-theme .hero {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #334155 100%);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                radial-gradient(circle at 20% 50%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content {
            color: white;
            animation: fadeInUp 0.8s ease forwards;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-xs);
            background-color: rgba(245, 158, 11, 0.2);
            color: var(--accent-color);
            padding: var(--spacing-xs) var(--spacing-md);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: var(--spacing-lg);
            border: 1px solid rgba(245, 158, 11, 0.3);
            animation: pulse 2s infinite;
        }

        .hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 900;
            margin-bottom: var(--spacing-lg);
            line-height: 1.1;
            background: linear-gradient(135deg, #ffffff 0%, #e5e7eb 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.5rem;
            font-weight: 400;
            margin-bottom: var(--spacing-xl);
            color: rgba(255, 255, 255, 0.9);
            opacity: 0;
            animation: fadeInUp 0.8s ease 0.2s forwards;
        }

        .hero-description {
            font-size: 1.125rem;
            margin-bottom: var(--spacing-2xl);
            color: rgba(255, 255, 255, 0.95);
            line-height: 1.7;
            opacity: 0;
            animation: fadeInUp 0.8s ease 0.4s forwards;
            max-width: 600px;
        }

        .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-2xl);
            opacity: 0;
            animation: fadeInUp 0.8s ease 0.6s forwards;
        }

        .hero-feature {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            color: white;
            font-weight: 500;
            background-color: rgba(255, 255, 255, 0.1);
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--radius-md);
            backdrop-filter: blur(10px);
        }

        .hero-feature i {
            color: var(--accent-color);
            font-size: 1.125rem;
        }

        .hero-actions {
            display: flex;
            gap: var(--spacing-md);
            opacity: 0;
            animation: fadeInUp 0.8s ease 0.8s forwards;
        }

       .hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 100%;
  overflow: hidden;
}

       .book-cover {
  max-width: 100%;
  position: relative;
}

        .book-cover::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, transparent 0%, rgba(0, 0, 0, 0.1) 100%);
            border-radius: inherit;
        }

        .book-cover:hover {
            transform: perspective(1000px) rotateY(0deg) scale(1.05);
        }

        .book-badge {
            position: absolute;
            top: -15px;
            right: -15px;
            background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
            color: var(--primary-color);
            padding: var(--spacing-sm) var(--spacing-md);
            font-size: 0.875rem;
            font-weight: 700;
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-lg);
            transform: rotate(15deg);
            z-index: 1;
        }

        .author-tag {
            position: absolute;
            bottom: -40px;
            left: 90%;
            transform: translateX(-50%);
            background-color: rgba(0, 0, 0, 0.8);
            color: white;
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
        }

        .stats-section {
            padding: var(--spacing-3xl) 0;
            background: linear-gradient(135deg, var(--bg-section) 0%, var(--bg-main) 100%);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--spacing-xl);
            text-align: center;
        }

        .stat-item {
            padding: var(--spacing-lg);
            background-color: var(--bg-card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
        }

        .stat-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-xl);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-color);
            margin-bottom: var(--spacing-sm);
            font-family: var(--font-heading);
        }

        .stat-label {
            font-size: 1rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .best-seller-img {
  width: 100%;
  max-width: 360px; /* desktop safe size */
  height: auto;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: var(--spacing-xl);
        }

        .benefit-card {
            background-color: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-2xl);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .benefit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-color), var(--support-accent));
            transform: scaleX(0);
            transition: transform var(--transition-normal);
        }

        .benefit-card:hover::before {
            transform: scaleX(1);
        }

        .benefit-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-2xl);
        }

        .benefit-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.2));
            color: var(--accent-color);
            border-radius: var(--radius-xl);
            font-size: 2rem;
            margin-bottom: var(--spacing-lg);
            transition: all var(--transition-normal);
        }

        .benefit-card:hover .benefit-icon {
            transform: scale(1.1) rotate(5deg);
        }

        .benefit-title {
            font-size: 1.5rem;
            margin-bottom: var(--spacing-md);
            color: var(--text-heading);
        }

        .benefit-description {
            color: var(--text-body);
            line-height: 1.7;
        }

        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
        }

        .about-image {
            position: relative;
        }

        .about-image img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            transition: transform var(--transition-normal);
        }

        .about-image:hover img {
            transform: scale(1.02);
        }

        .about-text h3 {
            font-size: 2rem;
            margin-bottom: var(--spacing-lg);
            color: var(--text-heading);
        }

        .about-text p {
            font-size: 1.125rem;
            margin-bottom: var(--spacing-lg);
            color: var(--text-body);
        }

        .target-audience {
            background-color: var(--bg-section);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            margin: var(--spacing-xl) 0;
            border: 1px solid var(--border-color);
        }

        .target-audience h4 {
            font-size: 1.25rem;
            margin-bottom: var(--spacing-lg);
            color: var(--text-heading);
        }

        .target-list {
            list-style: none;
        }

        .target-list li {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            color: var(--text-body);
            font-size: 1.05rem;
        }

        .target-list i {
            color: var(--support-accent);
            margin-top: 2px;
            font-size: 1.125rem;
        }

        .author-content {
            display: grid;
            grid-template-columns: 350px 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
        }

        .author-image {
            width: 350px;
            height: 350px;
            border-radius: 50%;
            overflow: hidden;
            margin: 0 auto;
            box-shadow: var(--shadow-xl);
            border: 8px solid var(--bg-card);
            position: relative;
            transition: transform var(--transition-normal);
        }

        .author-image:hover {
            transform: scale(1.05);
        }

        .author-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .author-text h3 {
            font-size: 2.25rem;
            margin-bottom: var(--spacing-lg);
            color: var(--text-heading);
        }

        .author-credentials {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            margin: var(--spacing-xl) 0;
        }

        .credential {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            background-color: var(--bg-section);
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            color: var(--text-body);
            border: 1px solid var(--border-color);
            transition: all var(--transition-normal);
        }

        .credential:hover {
            background-color: var(--accent-color);
            color: white;
            transform: translateY(-2px);
        }

        .credential i {
            color: var(--accent-color);
            font-size: 1rem;
        }

        .credential:hover i {
            color: white;
        }

        .social-links {
            display: flex;
            gap: var(--spacing-md);
            margin-top: var(--spacing-xl);
        }

        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background-color: var(--bg-section);
            color: var(--text-body);
            border-radius: 50%;
            transition: all var(--transition-normal);
            border: 1px solid var(--border-color);
            font-size: 1.25rem;
        }

        .social-link:hover {
            background-color: var(--accent-color);
            color: white;
            transform: translateY(-5px) rotate(360deg);
            box-shadow: var(--shadow-lg);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: var(--spacing-xl);
        }

        .testimonial-card {
            background-color: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-2xl);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
            position: relative;
            border: 1px solid var(--border-color);
        }

        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 1.5rem;
            left: 1.5rem;
            font-size: 4rem;
            color: var(--accent-color);
            opacity: 0.2;
            font-family: var(--font-heading);
        }

        .testimonial-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-2xl);
        }

        .testimonial-rating {
            color: var(--accent-color);
            margin-bottom: var(--spacing-lg);
            font-size: 1.25rem;
        }

        .testimonial-text {
            font-style: italic;
            margin-bottom: var(--spacing-xl);
            color: var(--text-body);
            line-height: 1.7;
            position: relative;
            z-index: 1;
            font-size: 1.05rem;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }

        .author-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid var(--border-color);
        }

        .author-info h4 {
            font-size: 1.125rem;
            margin-bottom: var(--spacing-xs);
            color: var(--text-heading);
        }

        .author-info p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin: 0;
        }

        .pricing-container {
            max-width: 650px;
            margin: 0 auto;
            background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-section) 100%);
            border-radius: var(--radius-2xl);
            padding: var(--spacing-3xl);
            box-shadow: var(--shadow-xl);
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .pricing-container::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
        }

        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .pricing-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-xs);
            background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
            color: var(--primary-color);
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 700;
            margin-bottom: var(--spacing-lg);
            box-shadow: var(--shadow-md);
            animation: pulse 2s infinite;
            position: relative;
            z-index: 1;
        }

        .pricing-title {
            font-size: 2.25rem;
            margin-bottom: var(--spacing-lg);
            color: var(--text-heading);
            position: relative;
            z-index: 1;
        }

        /* Prevent any image from overflowing */
img {
  max-width: 100%;
  height: auto;
  display: block;
}


        .pricing-price {
            display: flex;
            align-items: baseline;
            justify-content: center;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-xl);
            position: relative;
            z-index: 1;
        }

        .price-currency {
            font-size: 1.75rem;
            color: var(--text-muted);
        }

        .price-amount {
            font-size: 4rem;
            font-weight: 900;
            color: var(--accent-color);
            font-family: var(--font-heading);
        }

        .price-original {
            font-size: 1.75rem;
            color: var(--text-muted);
            text-decoration: line-through;
        }

        .pricing-features {
            list-style: none;
            text-align: left;
            max-width: 450px;
            margin: 0 auto var(--spacing-xl);
            position: relative;
            z-index: 1;
        }

        .pricing-features li {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-md);
            padding: var(--spacing-md) 0;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-body);
            font-size: 1.05rem;
        }

        .pricing-features li:last-child {
            border-bottom: none;
        }

        .pricing-features i {
            color: var(--support-accent);
            margin-top: 2px;
            font-size: 1.125rem;
        }

        .trust-badges {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-xl);
            position: relative;
            z-index: 1;
        }

        .trust-badge {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            color: var(--text-muted);
            font-size: 0.875rem;
            font-weight: 500;
        }

        .trust-badge i {
            color: var(--support-accent);
            font-size: 1.125rem;
        }

        .preview-container {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .preview-form {
            display: flex;
            gap: var(--spacing-md);
            max-width: 200px;
            margin: var(--spacing-xl) auto 0;
            background-color: var(--bg-card);
            border-radius: var(--radius-full);
            padding: var(--spacing-xs);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        .preview-input {
            flex: 1;
            padding: var(--spacing-md) var(--spacing-lg);
            border: none;
            border-radius: var(--radius-full);
            font-size: 1rem;
            background-color: transparent;
            color: var(--text-body);
        }

        .preview-input:focus {
            outline: none;
        }

        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--bg-card);
            border-radius: var(--radius-xl);
            margin-bottom: var(--spacing-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: all var(--transition-normal);
            border: 1px solid var(--border-color);
        }

        .faq-item.active {
            box-shadow: var(--shadow-xl);
        }

        .faq-question {
            width: 100%;
            padding: var(--spacing-xl);
            background: none;
            border: none;
            text-align: left;
            font-family: var(--font-body);
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text-heading);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all var(--transition-normal);
        }

        .faq-question:hover {
            background-color: var(--bg-section);
        }

        body.dark-theme .faq-question:hover {
            background-color: var(--dark-bg-card);
        }

        .faq-question i {
            transition: transform var(--transition-normal);
            font-size: 1.25rem;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
        }

        .faq-answer-content {
            padding: 0 var(--spacing-xl) var(--spacing-xl);
            color: var(--text-body);
            line-height: 1.7;
            font-size: 1.05rem;
        }

        .contact-container {
            max-width: 650px;
            margin: 0 auto;
        }

        .contact-form {
            background-color: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: var(--spacing-3xl);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        .form-group {
            margin-bottom: var(--spacing-xl);
        }

        .form-label {
            display: block;
            margin-bottom: var(--spacing-sm);
            font-weight: 600;
            color: green;
            font-size: 0.95rem;
        }

        .form-input,
        .form-textarea {
            width: 100%;
            padding: var(--spacing-md) var(--spacing-lg);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-lg);
            font-size: 1rem;
            background-color: var(--bg-card);
            color: var(--text-body);
            transition: all var(--transition-normal);
        }

        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
        }

        body.dark-theme .form-input,
        body.dark-theme .form-textarea {
            background-color: var(--dark-bg-card);
        }

        .form-textarea {
            resize: vertical;
            min-height: 150px;
        }

        .footer {
            background-color: var(--secondary-color);
            color: white;
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
        }

        body.dark-theme .footer {
            background-color: var(--dark-bg-main);
        }

        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-xl);
        }

        .footer-column h4 {
            font-size: 1.25rem;
            margin-bottom: var(--spacing-lg);
            color: white;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: var(--spacing-md);
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--transition-normal);
            font-weight: 400;
        }

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-xl);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.875rem;
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: var(--z-modal);
            align-items: center;
            justify-content: center;
            padding: var(--spacing-lg);
            backdrop-filter: blur(5px);
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background-color: var(--bg-card);
            border-radius: var(--radius-2xl);
            max-width: 550px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
            animation: modalSlideIn 0.3s ease;
            box-shadow: var(--shadow-2xl);
        }

        @keyframes modalSlideIn {
            from {
                opacity: 0;
                transform: translateY(-30px) scale(0.95);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        .modal-header {
            padding: var(--spacing-xl);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-title {
            font-size: 1.75rem;
            margin: 0;
            color: var(--text-heading);
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-muted);
            cursor: pointer;
            padding: var(--spacing-sm);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }

        .modal-close:hover {
            background-color: var(--bg-section);
            color: var(--text-body);
        }

        body.dark-theme .modal-close:hover {
            background-color: var(--dark-bg-card);
        }

        .modal-body {
            padding: var(--spacing-xl);
        }

        .modal-footer {
            padding: var(--spacing-xl);
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: flex-end;
            gap: var(--spacing-md);
        }

        .order-summary {
            background-color: var(--bg-section);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
            border: 1px solid var(--border-color);
        }

        .order-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: var(--spacing-md);
            color: var(--text-body);
            font-size: 1.05rem;
        }

        .order-item:last-child {
            margin-bottom: 0;
            padding-top: var(--spacing-md);
            border-top: 2px solid var(--border-color);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-heading);
        }

        .payment-methods {
            display: flex;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-xl);
        }

        .payment-method {
            flex: 1;
            padding: var(--spacing-lg);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-xl);
            text-align: center;
            cursor: pointer;
            transition: all var(--transition-normal);
        }

        .payment-method:hover {
            border-color: var(--accent-color);
            background-color: rgba(245, 158, 11, 0.05);
            transform: translateY(-2px);
        }

        body.dark-theme .payment-method:hover {
            background-color: rgba(245, 158, 11, 0.1);
        }

        .payment-method.selected {
            border-color: var(--accent-color);
            background-color: rgba(245, 158, 11, 0.1);
            box-shadow: var(--shadow-md);
        }

        body.dark-theme .payment-method.selected {
            background-color: rgba(245, 158, 11, 0.2);
        }

        .payment-method i {
            font-size: 2rem;
            color: var(--text-body);
            margin-bottom: var(--spacing-sm);
        }

        .payment-method.selected i {
            color: var(--accent-color);
        }

        .success-message,
        .error-message {
            display: none;
            padding: var(--spacing-lg);
            border-radius: var(--radius-lg);
            margin-bottom: var(--spacing-lg);
            animation: slideDown 0.3s ease;
            font-weight: 500;
        }

        .success-message {
            background-color: var(--support-accent);
            color: white;
        }

        .error-message {
            background-color: var(--danger-color);
            color: white;
        }

        .success-message.show,
        .error-message.show {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .spinner {
            display: none;
            width: 50px;
            height: 50px;
            border: 4px solid var(--border-color);
            border-top: 4px solid var(--accent-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: var(--spacing-xl) auto;
        }

        .spinner.show {
            display: block;
        }

        .scroll-top {
            position: fixed;
            bottom: var(--spacing-xl);
            right: var(--spacing-xl);
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
            color: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-lg);
            z-index: var(--z-fixed);
            font-size: 1.25rem;
        }

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

        .scroll-top:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-xl);
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-20px);
            }
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @media (max-width: 1024px) {
            .hero-container,
            .about-content {
                grid-template-columns: 1fr;
                text-align: center;
                gap: var(--spacing-2xl);
            }

            .author-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .author-image {
                width: 280px;
                height: 280px;
            }
        }

        @media (max-width: 768px) {
            .navbar-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--bg-card);
                flex-direction: column;
                padding: var(--spacing-xl);
                box-shadow: var(--shadow-xl);
                transform: translateY(-20px);
                opacity: 0;
                transition: all var(--transition-normal);
            }

            body.dark-theme .navbar-menu {
                background-color: var(--dark-bg-card);
            }

            .navbar-menu.active {
                display: flex;
                transform: translateY(0);
                opacity: 1;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .hero-title {
                font-size: clamp(2rem, 6vw, 3rem);
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn-block {
                width: 100%;
            }

            .preview-form {
                flex-direction: column;
            }

            .payment-methods {
                flex-direction: column;
            }

            .footer-container {
                grid-template-columns: 1fr;
                text-align: center;
            }

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

            .hero {
                padding: calc(100px + var(--spacing-section-mobile)) 0 var(--spacing-section-mobile);
            }

            .benefits-grid,
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }

            h2 {
                font-size: 1.75rem;
            }

            .container {
                padding: 0 var(--spacing-md);
            }

            .book-cover {
                max-width: 300px;
                height: 380px;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

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

        .mb-0 {
            margin-bottom: 0;
        }

        .mt-0 {
            margin-top: 0;
        }

        .btn {
            position: relative;
            overflow: hidden;
        }

        .ripple {
            position: absolute;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.5);
            transform: scale(0);
            animation: ripple-animation 0.6s ease-out;
            pointer-events: none;
        }

        @keyframes ripple-animation {
            to {
                transform: scale(4);
                opacity: 0;
            }
        }