/*
 * Vidyanex - Core Premium Stylesheet
 * Incorporates Modern HSL Colors, Sleek Dark Mode variables, Glassmorphic components, and micro-interactions.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --font-sans: 'Inter', sans-serif;
    
    /* Light Mode Variables */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --color-text-main: #0f172a;
    --color-text-muted: #64748b;
    --color-brand-primary: #667eea;
    --color-brand-secondary: #764ba2;
    --color-accent: #06b6d4;
    
    --border-color: #e2e8f0;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(226, 232, 240, 0.6);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.05);
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

[data-theme="dark"] {
    /* Dark Mode Variables */
    --bg-primary: #09090b;
    --bg-secondary: #121214;
    --bg-tertiary: #1a1a1e;
    --color-text-main: #f4f4f5;
    --color-text-muted: #a1a1aa;
    --color-brand-primary: #6366f1;
    --color-brand-secondary: #8b5cf6;
    --color-accent: #22d3ee;
    
    --border-color: #27272a;
    --glass-bg: rgba(18, 18, 20, 0.8);
    --glass-border: rgba(39, 39, 42, 0.6);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--color-text-main);
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
    margin: 0;
    overflow-x: hidden;
}

/* Redesign Headers */
h1, h2, h3, h4, h5, h6, .display-1, .display-2, .display-3, .display-4 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Glassmorphism Styles */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-md);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
}

.glass-panel-hover:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 12px 40px rgba(0, 242, 254, 0.15);
}

/* Floating Drop Shadow Cards & Badges System */
.drop-shadow-card {
    background: var(--bg-secondary, #ffffff);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 20px;
    box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.12), 0 8px 16px -8px rgba(15, 23, 42, 0.08);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
}

.drop-shadow-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 60px -15px rgba(99, 102, 241, 0.2), 0 12px 24px -8px rgba(15, 23, 42, 0.1);
}

.drop-shadow-pill {
    background: var(--bg-secondary, #ffffff);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 9999px;
    box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.drop-shadow-pill:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 35px -8px rgba(99, 102, 241, 0.18);
}

[data-theme="dark"] .drop-shadow-card,
[data-theme="dark"] .drop-shadow-pill {
    background: #121214;
    border-color: rgba(39, 39, 42, 0.8);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6), 0 8px 16px -8px rgba(0, 0, 0, 0.4);
}

/* Glowing outline border modifier */
.glow-border {
    position: relative;
}
.glow-border::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0.35;
    transition: opacity var(--transition-fast);
}
.glow-border:hover::after {
    opacity: 0.9;
}

/* Linear Gradients */
.gradient-text {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.gradient-bg {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary));
    color: #ffffff;
}

/* Custom Nav Header */
.sticky-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 13, 26, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: background var(--transition-fast);
}

/* Interactive Buttons */
.btn-premium {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary));
    color: #05070f !important;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 28px;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn-premium::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: all 0.6s ease;
}

.btn-premium:hover::before {
    left: 100%;
}

.btn-premium:hover {
    opacity: 1;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 24px rgba(0, 242, 254, 0.5);
    color: #05070f !important;
}

.btn-premium-outline {
    background: transparent;
    color: var(--color-brand-primary) !important;
    border: 2.5px solid var(--color-brand-primary);
    border-radius: var(--radius-sm);
    padding: 10px 26px;
    font-weight: 600;
    transition: all var(--transition-smooth);
}

.btn-premium-outline:hover {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary));
    color: #05070f !important;
    border-color: transparent;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 24px rgba(0, 242, 254, 0.4);
}

/* Floating Action Trigger Buttons */
.floating-cta {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
}

.floating-chat-trigger {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-accent));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.4);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.floating-chat-trigger:hover {
    transform: scale(1.08);
}

/* Modern Dashboard Layout Framework */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.dashboard-sidebar {
    width: 260px;
    background: var(--bg-secondary);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-right: 1px solid var(--border-color);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-smooth);
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
}

.dashboard-content {
    flex-grow: 1;
    padding: 30px;
    background-color: transparent;
    overflow-y: auto;
}

.sidebar-menu-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--color-text-muted);
    text-decoration: none;
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.sidebar-menu-item i {
    margin-right: 12px;
    font-size: 18px;
}

.sidebar-menu-item:hover, .sidebar-menu-item.active {
    background-color: rgba(0, 242, 254, 0.1);
    color: var(--color-brand-primary);
}

/* Dashboard Cards */
.stat-card {
    padding: 24px;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 12px 40px rgba(0, 242, 254, 0.15);
}

/* Live Chat Widget Box */
.chat-widget-box {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 380px;
    height: 500px;
    display: none;
    flex-direction: column;
    z-index: 1000;
    overflow: hidden;
}

.chat-header {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary));
    color: white;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-messages-container {
    flex-grow: 1;
    padding: 16px;
    overflow-y: auto;
    background-color: var(--bg-primary);
}

.chat-bubble {
    max-width: 75%;
    padding: 10px 14px;
    border-radius: 18px;
    margin-bottom: 12px;
    font-size: 14px;
    line-height: 1.4;
}

.chat-bubble.sent {
    background-color: var(--color-brand-primary);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: 4px;
}

.chat-bubble.received {
    background-color: var(--border-color);
    color: var(--color-text-main);
    margin-right: auto;
    border-bottom-left-radius: 4px;
}

.chat-input-area {
    padding: 12px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.chat-input-area input {
    flex-grow: 1;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 16px;
    outline: none;
    font-size: 14px;
}

/* Mobile Responsive Sidebar Overlays */
@media (max-width: 991px) {
    .dashboard-sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        z-index: 1050;
        box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    }
    
    .dashboard-sidebar.show {
        left: 0;
    }
    
    .chat-widget-box {
        width: 90%;
        right: 5%;
        left: 5%;
    }
}

/* Table and question image scaling inside mathjax-render-zone */
.mathjax-render-zone img {
    max-height: 80px;
    width: auto;
    object-fit: contain;
    vertical-align: middle;
    margin: 4px;
}

/* Iframe mode layout styles */
html.iframe-mode .dashboard-sidebar {
    display: none !important;
}
html.iframe-mode .dashboard-container {
    display: block !important;
}
html.iframe-mode .dashboard-content {
    padding: 20px 20px 100px 20px !important;
    width: 100% !important;
    min-height: 100vh !important;
    background-color: var(--bg-primary) !important;
}
html.iframe-mode header.sticky-nav, 
html.iframe-mode header.navbar,
html.iframe-mode header.sticky-top,
html.iframe-mode .topbar-wrapper, 
html.iframe-mode #topbar,
html.iframe-mode .admin-tab-bar {
    display: none !important;
}

/* Parent dashboard tab bar */
.admin-tab-bar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 8px 16px 0 16px;
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    white-space: nowrap;
    flex-wrap: nowrap !important;
}
.admin-tab-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.admin-tab-item:hover {
    background-color: var(--bg-secondary);
    color: var(--color-text-main);
}
.admin-tab-item.active {
    background-color: var(--bg-secondary);
    color: var(--color-brand-primary);
    border-bottom: 1px solid var(--bg-secondary);
    font-weight: 600;
}
.admin-tab-close {
    font-size: 11px;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}
.admin-tab-close:hover {
    background-color: #ef4444;
    color: white;
}

/* Tab contents iframe container */
.admin-tab-pane {
    width: 100%;
    height: calc(100vh - 120px);
    border: none;
}
.admin-tab-pane-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}
.admin-tab-pane-container.active {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
}

/* Premium Form Input Enhancements */
.form-control:focus {
    border-color: var(--color-brand-primary) !important;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15) !important;
}

/* Reference site navigation styles (Online Growth Hub style) */
.sticky-nav {
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}
.brand-icon {
    color: var(--color-brand-primary);
    transition: all 0.3s ease;
}
.sticky-nav a:hover .brand-icon {
    transform: rotate(-10deg) scale(1.1);
    color: var(--color-brand-secondary);
}
.sticky-nav .nav-link {
    color: #333 !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px !important;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}
.sticky-nav .nav-link i {
    font-size: 1rem;
    opacity: 0.7;
    transition: all 0.3s ease;
}
.sticky-nav .nav-link:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--color-brand-primary) !important;
    transform: translateY(-2px);
}
.sticky-nav .nav-link:hover i {
    opacity: 1;
    transform: scale(1.1);
}
.sticky-nav .nav-link.active {
    background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%) !important;
    color: white !important;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}
.sticky-nav .nav-link.active i {
    opacity: 1;
    color: white;
}
.btn-register-ref {
    background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
    border: none;
    border-radius: 25px;
    padding: 8px 20px;
    font-weight: 600;
    color: white !important;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.btn-register-ref:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    opacity: 0.95;
}
.login-link-ref {
    color: var(--color-brand-primary) !important;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
}
.login-link-ref:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--color-brand-secondary) !important;
}

/* Diagonal split background for hero */
.hero-section-ref {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    overflow: hidden;
}
.hero-section-ref::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
    clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
    opacity: 0.08;
    z-index: 0;
}

/* Testimonial Card reference styles */
.testimonial-card-ref {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.testimonial-card-ref:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.07);
}
.testimonial-card-ref.highlighted {
    border: 1.5px solid var(--color-brand-primary) !important;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15) !important;
}
.quote-icon-ref {
    color: var(--color-brand-primary);
    opacity: 0.25;
    font-size: 2.2rem;
    line-height: 1;
    margin-bottom: 2px;
}

/* Scroll-Driven reveal animations */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}
.reveal-on-scroll.active {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }
.delay-500 { transition-delay: 500ms; }

/* Slide from Left */
.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}
.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

/* Slide from Right */
.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}
.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* Scale up reveal */
.reveal-scale {
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}
.reveal-scale.active {
    opacity: 1;
    transform: scale(1);
}

/* Dark theme support for landing page cards */
[data-theme="dark"] .bg-white {
    background-color: var(--bg-secondary) !important;
}
[data-theme="dark"] .testimonial-card-ref {
    background-color: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
}
[data-theme="dark"] .card {
    background-color: var(--bg-secondary) !important;
    color: var(--color-text-main) !important;
}
[data-theme="dark"] .card .text-dark-emphasis {
    color: var(--color-text-main) !important;
}
[data-theme="dark"] .card .bg-light {
    background-color: var(--bg-tertiary) !important;
    border-color: var(--border-color) !important;
}
[data-theme="dark"] .bg-gradient-light-dark {
    background: linear-gradient(135deg, #09090b 0%, #121214 100%) !important;
}
.bg-gradient-light-dark {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.02) 0%, rgba(118, 75, 162, 0.02) 100%);
}
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%) !important;
}

/* Quiz interaction buttons hover glows */
.quiz-btn {
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
}

/* Quiz Custom Styles */
.quiz-step h4 {
    color: var(--color-text-main);
    font-size: 1.35rem;
    letter-spacing: -0.02em;
}

/* Custom interactive quiz option cards */
.quiz-option-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    text-align: left;
    width: 100%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.01);
}

.quiz-option-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-brand-primary), var(--color-brand-secondary));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.quiz-option-card:hover {
    transform: translateY(-3px) scale(1.01);
    border-color: rgba(102, 126, 234, 0.4) !important;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.08);
}

.quiz-option-card:hover::before {
    opacity: 1;
}

/* Icon box inside card */
.quiz-icon-box {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

/* Specific colors for icon boxes */
.quiz-icon-yellow {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
}
.quiz-icon-blue {
    background: rgba(59, 130, 246, 0.1);
    color: #2563eb;
}
.quiz-icon-green {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}
.quiz-icon-cyan {
    background: rgba(6, 182, 212, 0.1);
    color: #0891b2;
}
.quiz-icon-red {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.quiz-option-card:hover .quiz-icon-box {
    transform: scale(1.1);
}

/* Quiz Option Text */
.quiz-option-text {
    flex-grow: 1;
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-text-main);
}

/* Chevron indicator */
.quiz-chevron {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    opacity: 0.5;
    transition: all 0.3s ease;
}

.quiz-option-card:hover .quiz-chevron {
    transform: translateX(4px);
    opacity: 1;
    color: var(--color-brand-primary);
}

/* Grade buttons grid */
.quiz-grade-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px;
    font-weight: 700;
    font-size: 1.02rem;
    color: var(--color-text-main);
    transition: all 0.3s ease;
    cursor: pointer;
    width: 100%;
}

.quiz-grade-btn:hover {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-secondary)) !important;
    color: #ffffff !important;
    border-color: transparent !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(102, 126, 234, 0.3);
}

/* Step Animations */
.quiz-step {
    animation: quizFadeIn 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

@keyframes quizFadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Orbiting graphic visual (Sisya Class inspired) */
.orbit-container {
    position: relative;
    width: 480px;
    height: 480px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Central profile image */
.orbit-center {
    width: 270px;
    height: 270px;
    border-radius: 50%;
    border: 4px solid var(--bg-secondary);
    box-shadow: 0 0 45px rgba(102, 126, 234, 0.25);
    background-color: var(--bg-secondary);
    overflow: hidden;
    z-index: 10;
    position: relative;
}

.orbit-center img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Outer orbit line */
.orbit-line {
    position: absolute;
    width: 390px;
    height: 390px;
    border: 1px dashed var(--color-brand-primary);
    border-radius: 50%;
    opacity: 0.6;
    z-index: 1;
}

/* Spinning wrapper */
.orbit-ring {
    position: absolute;
    width: 390px;
    height: 390px;
    z-index: 5;
    animation: orbitSpin 35s linear infinite;
    transform-style: preserve-3d;
}

/* Individual orbit item */
.orbit-item {
    position: absolute;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.22rem;
    animation: orbitCounterSpin 35s linear infinite;
}

/* Position orbit items mathematically along the 390px diameter circle (radius 195px) */
.orbit-item-1 {
    top: -24px;
    left: 171px;
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border-color: rgba(245, 158, 11, 0.2);
}
.orbit-item-2 {
    top: 74px;
    left: 340px;
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border-color: rgba(16, 185, 129, 0.2);
}
.orbit-item-3 {
    top: 268px;
    left: 340px;
    background: rgba(59, 130, 246, 0.1);
    color: #2563eb;
    border-color: rgba(59, 130, 246, 0.2);
}
.orbit-item-4 {
    top: 366px;
    left: 171px;
    background: rgba(6, 182, 212, 0.1);
    color: #0891b2;
    border-color: rgba(6, 182, 212, 0.2);
}
.orbit-item-5 {
    top: 268px;
    left: 2px;
    background: rgba(139, 92, 246, 0.1);
    color: #7c3aed;
    border-color: rgba(139, 92, 246, 0.2);
}
.orbit-item-6 {
    top: 74px;
    left: 2px;
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border-color: rgba(239, 68, 68, 0.2);
}

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

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

/* Personalized highlights */
.personalized-highlight {
    border: 2px solid var(--color-brand-primary) !important;
    transform: scale(1.02);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.15) !important;
    opacity: 1 !important;
}

[data-theme="dark"] .personalized-highlight {
    border-color: var(--color-brand-secondary) !important;
    box-shadow: 0 12px 35px rgba(139, 92, 246, 0.2) !important;
}

/* Admin Tab Pane Container and Iframe Layout */
.admin-tab-pane-container {
    display: none;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.admin-tab-pane-container.active {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
}

.admin-tab-pane {
    width: 100%;
    height: 100%;
    border: none;
}