/* ============================================
   SKILL EXPO — Design System CSS
   Premium Education Platform Styles
   ============================================ */

/* ─── Google Fonts ─── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ─── CSS Custom Properties (Design Tokens) ─── */
:root {
    /* Primary Palette — Deep Indigo to Vibrant Violet */
    --primary-50: #EEF2FF;
    --primary-100: #E0E7FF;
    --primary-200: #C7D2FE;
    --primary-300: #A5B4FC;
    --primary-400: #818CF8;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --primary-900: #312E81;

    /* Accent — Vibrant Violet */
    --accent-50: #F5F3FF;
    --accent-100: #EDE9FE;
    --accent-200: #DDD6FE;
    --accent-300: #C4B5FD;
    --accent-400: #A78BFA;
    --accent-500: #8B5CF6;
    --accent-600: #7C3AED;
    --accent-700: #6D28D9;
    --accent-800: #5B21B6;
    --accent-900: #4C1D95;

    /* Success — Teal/Green */
    --success-50: #F0FDF4;
    --success-100: #DCFCE7;
    --success-500: #22C55E;
    --success-600: #16A34A;
    --success-700: #15803D;

    /* Warning — Amber */
    --warning-50: #FFFBEB;
    --warning-100: #FEF3C7;
    --warning-500: #F59E0B;
    --warning-600: #D97706;

    /* Danger — Red */
    --danger-50: #FEF2F2;
    --danger-100: #FEE2E2;
    --danger-500: #EF4444;
    --danger-600: #DC2626;
    --danger-700: #B91C1C;

    /* Info — Cyan */
    --info-50: #ECFEFF;
    --info-100: #CFFAFE;
    --info-500: #06B6D4;
    --info-600: #0891B2;

    /* Neutrals */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --gray-950: #030712;

    /* Functional */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --border-color: #E2E8F0;
    --border-light: #F1F5F9;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #A855F7 100%);
    --gradient-hero: linear-gradient(135deg, #1E1B4B 0%, #312E81 30%, #4338CA 60%, #6D28D9 100%);
    --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #F8FAFC 100%);
    --gradient-dark: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
    --gradient-accent: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
    --gradient-success: linear-gradient(135deg, #059669 0%, #10B981 100%);
    --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px 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);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.04);
    --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.12), 0 16px 40px rgba(0,0,0,0.08);

    /* Typography */
    --font-primary: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Layout */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1400px;
    --header-height: 72px;
    --sidebar-width: 280px;
}

/* ─── Reset & Base ─── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-700);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; letter-spacing: -0.025em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ─── Container ─── */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-2xl { max-width: var(--container-2xl); }

/* ─── Header / Navbar ─── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-brand .brand-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    font-weight: 900;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.navbar-brand span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
}

.navbar-nav a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    color: var(--text-primary);
    font-size: 1.5rem;
}

/* ─── Hero Section ─── */
.hero {
    position: relative;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: calc(var(--header-height) + var(--space-8)) 0 var(--space-12);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 15% 40%, rgba(124, 58, 237, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 85% 25%, rgba(99, 102, 241, 0.35) 0%, transparent 45%),
        radial-gradient(circle at 60% 85%, rgba(168, 85, 247, 0.25) 0%, transparent 45%);
    z-index: 1;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px);
    background-size: 32px 32px;
    z-index: 1;
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: var(--space-12);
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 640px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.4rem 1.1rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-full);
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-5);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hero-badge .badge-dot {
    width: 8px;
    height: 8px;
    background: #34D399;
    border-radius: 50%;
    box-shadow: 0 0 10px #34D399;
    animation: pulse 2s infinite;
}

.hero h1 {
    font-size: clamp(2.4rem, 4.2vw, 3.8rem);
    font-weight: 800;
    color: white;
    line-height: 1.12;
    margin-bottom: var(--space-5);
    letter-spacing: -0.03em;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #C4B5FD 0%, #F0ABFC 50%, #93C5FD 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.82);
    margin-bottom: var(--space-8);
    max-width: 540px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
}

.hero-features-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}

.hero-features-row span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ─── Hero Visual & Interactive Preview Card ─── */
.hero-visual {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-quiz-card {
    width: 100%;
    max-width: 480px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 28px;
    padding: var(--space-6);
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.6), 0 0 50px rgba(124, 58, 237, 0.3);
    color: white;
    position: relative;
    z-index: 2;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hero-quiz-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 35px 70px -15px rgba(0, 0, 0, 0.7), 0 0 60px rgba(124, 58, 237, 0.45);
}

.hero-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-timer-pill {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.45);
    color: #FCA5A5;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.hero-preview-qtext {
    font-size: 1.15rem;
    font-weight: 700;
    color: white;
    line-height: 1.45;
    margin: 10px 0 16px;
}

.hero-option-choice {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 10px 14px;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.hero-option-choice:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
}

.hero-option-choice.selected-preview {
    background: rgba(99, 102, 241, 0.28);
    border-color: #818CF8;
    box-shadow: 0 0 16px rgba(99, 102, 241, 0.35);
    color: white;
    font-weight: 600;
}

.hero-opt-badge {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: white;
    flex-shrink: 0;
}

.selected-preview .hero-opt-badge {
    background: var(--primary-500);
}

.hero-floating-pill {
    position: absolute;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 18px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
    z-index: 3;
    white-space: nowrap;
    animation: float 6s ease-in-out infinite;
}

.hero-floating-pill.pill-top {
    top: -20px;
    right: -20px;
}

.hero-floating-pill.pill-bottom {
    bottom: -18px;
    left: -20px;
    animation-delay: -3s;
}

/* ─── Hero Full-Width Stats Banner ─── */
.hero-stats-banner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-stat-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-fast);
}

.hero-stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.25);
}

.hero-stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.hero-stat-val {
    font-size: 1.75rem;
    font-weight: 800;
    color: white;
    line-height: 1.1;
}

.hero-stat-lbl {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 2px;
}

/* Floating decorative elements */
.float-element {
    position: absolute;
    border-radius: var(--radius-2xl);
    animation: float 6s ease-in-out infinite;
}

.float-element:nth-child(1) {
    width: 200px;
    height: 200px;
    background: rgba(124, 58, 237, 0.15);
    top: 10%;
    right: 5%;
    animation-delay: 0s;
}

.float-element:nth-child(2) {
    width: 120px;
    height: 120px;
    background: rgba(99, 102, 241, 0.1);
    bottom: 20%;
    right: 15%;
    animation-delay: -2s;
}

.float-element:nth-child(3) {
    width: 80px;
    height: 80px;
    background: rgba(168, 85, 247, 0.1);
    top: 40%;
    right: 25%;
    animation-delay: -4s;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.75rem 1.75rem;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::after {
    opacity: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.45);
    color: white;
}

.btn-secondary {
    background: #F1F5F9;
    color: #0F172A !important;
    border: 1px solid #CBD5E1;
    font-weight: 600;
}

.btn-secondary:hover {
    background: #E2E8F0;
    color: #020617 !important;
    border-color: #94A3B8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Scoped dark / glass variants for hero & dark headers */
.hero .btn-secondary,
.dash-header-wrap .btn-secondary,
.page-header .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #FFFFFF !important;
    border: 1px solid rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(10px);
}

.hero .btn-secondary:hover,
.dash-header-wrap .btn-secondary:hover,
.page-header .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #FFFFFF !important;
    border-color: rgba(255, 255, 255, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--primary-600);
    border: 2px solid var(--primary-200);
}

.btn-outline:hover {
    background: var(--primary-50);
    border-color: var(--primary-400);
    transform: translateY(-1px);
}

.btn-success {
    background: var(--gradient-success);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
}

.btn-danger {
    background: var(--danger-500);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.85rem;
    border-radius: var(--radius-lg);
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.05rem;
    border-radius: var(--radius-xl);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-lg);
}

/* ─── Section Styles ─── */
.section {
    padding: var(--space-20) 0;
}

.section-sm {
    padding: var(--space-12) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-header .section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-4);
    background: var(--primary-50);
    color: var(--primary-600);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-header h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* ─── Cards ─── */
.card {
    background: white;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-card);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-100);
}

.card-body {
    padding: var(--space-6);
}

.card-header {
    padding: var(--space-6) var(--space-6) 0;
}

.card-footer {
    padding: 0 var(--space-6) var(--space-6);
}

/* Quiz Card */
.quiz-card {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.quiz-card .card-thumbnail {
    position: relative;
    height: 200px;
    background: var(--gradient-primary);
    overflow: hidden;
}

.quiz-card .card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.quiz-card .card-thumbnail .category-badge {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.quiz-card .card-thumbnail .price-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-1) var(--space-3);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: var(--radius-full);
}

.price-badge.free {
    background: var(--success-500);
    color: white;
}

.price-badge.paid {
    background: white;
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.quiz-card .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.quiz-card .quiz-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.quiz-card .quiz-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.quiz-card .quiz-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.quiz-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.quiz-meta-item i {
    color: var(--primary-400);
    font-size: 0.85rem;
}

.quiz-card .quiz-rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.star-rating {
    display: flex;
    gap: 2px;
}

.star-rating .star {
    color: #FCD34D;
    font-size: 0.85rem;
}

.star-rating .star.empty {
    color: var(--gray-300);
}

.quiz-card .card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
}

/* Category Card */
.category-card {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-6);
    background: white;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-card);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-100);
}

.category-card .cat-icon {
    width: 64px;
    height: 64px;
    min-width: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.category-card .cat-info h4 {
    font-size: 1.05rem;
    margin-bottom: var(--space-1);
}

.category-card .cat-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.category-card .cat-count {
    margin-left: auto;
    padding: var(--space-1) var(--space-3);
    background: var(--primary-50);
    color: var(--primary-600);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

/* ─── Grid System ─── */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ─── How It Works ─── */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    position: relative;
}

.steps-grid::before {
    content: '';
    position: absolute;
    top: 48px;
    left: 15%;
    right: 15%;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0.2;
    z-index: 0;
}

.step-card {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-card .step-number {
    width: 96px;
    height: 96px;
    margin: 0 auto var(--space-5);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-size: 2rem;
    font-weight: 800;
    border-radius: var(--radius-2xl);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.25);
    transition: transform var(--transition-base);
}

.step-card:hover .step-number {
    transform: scale(1.08) rotate(-3deg);
}

.step-card h4 {
    margin-bottom: var(--space-2);
    font-size: 1.1rem;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ─── Testimonials ─── */
.testimonial-card {
    padding: var(--space-6);
    background: white;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-card);
}

.testimonial-card .review-stars {
    margin-bottom: var(--space-3);
}

.testimonial-card .review-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

.testimonial-card .reviewer {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.testimonial-card .reviewer-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1rem;
}

.testimonial-card .reviewer-info h5 {
    font-size: 0.9rem;
    font-weight: 600;
}

.testimonial-card .reviewer-info span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ─── Stats Banner ─── */
.stats-banner {
    background: var(--gradient-hero);
    padding: var(--space-12) 0;
    position: relative;
    overflow: hidden;
}

.stats-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(124, 58, 237, 0.3), transparent 60%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
    position: relative;
    z-index: 1;
}

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

.stat-item .stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-item .stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

/* ─── FAQ ─── */
.faq-item {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    margin-bottom: var(--space-3);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--primary-200);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-family: var(--font-primary);
    color: var(--text-primary);
}

.faq-question .faq-icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    color: var(--primary-600);
    border-radius: var(--radius-md);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: var(--primary-600);
    color: white;
}

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

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 var(--space-6) var(--space-5);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ─── Footer ─── */
.footer {
    background: var(--gradient-dark);
    color: white;
    padding: var(--space-16) 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

.footer-brand {
    max-width: 360px;
}

.footer-brand .brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-4);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-bottom: var(--space-6);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary-600);
    color: white;
    transform: translateY(-2px);
}

.footer-col h4 {
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: var(--space-5);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: var(--space-3);
}

.footer-col a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.footer-col a:hover {
    color: white;
    padding-left: var(--space-2);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-6) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ─── Forms ─── */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--space-1);
}

.form-error {
    font-size: 0.8rem;
    color: var(--danger-500);
    margin-top: var(--space-1);
}

/* ─── Alerts ─── */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    margin-bottom: var(--space-5);
    animation: slideDown 0.3s ease-out;
}

.alert-success {
    background: var(--success-50);
    color: var(--success-700);
    border: 1px solid var(--success-100);
}

.alert-error, .alert-danger {
    background: var(--danger-50);
    color: var(--danger-700);
    border: 1px solid var(--danger-100);
}

.alert-info {
    background: var(--info-50);
    color: var(--info-600);
    border: 1px solid var(--info-100);
}

.alert-warning {
    background: var(--warning-50);
    color: var(--warning-600);
    border: 1px solid var(--warning-100);
}

/* ─── Data Tables ─── */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table th {
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: var(--space-4);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-light);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

/* ─── Badges ─── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0.2em 0.65em;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: var(--primary-50);
    color: var(--primary-700);
}

.badge-success {
    background: var(--success-50);
    color: var(--success-700);
}

.badge-warning {
    background: var(--warning-50);
    color: var(--warning-600);
}

.badge-danger {
    background: var(--danger-50);
    color: var(--danger-700);
}

.badge-info {
    background: var(--info-50);
    color: var(--info-600);
}

/* ─── Pagination ─── */
.pagination {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    justify-content: center;
    margin-top: var(--space-8);
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.pagination a {
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.pagination a:hover {
    background: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-600);
}

.pagination .active {
    background: var(--primary-600);
    color: white;
    border: none;
}

/* ─── Search Bar ─── */
.search-bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    max-width: 800px;
    margin: 0 auto;
}

.search-bar .search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    font-family: var(--font-primary);
    outline: none;
    color: var(--text-primary);
}

.search-bar .search-input::placeholder {
    color: var(--text-muted);
}

.search-bar .search-filters {
    display: flex;
    gap: var(--space-2);
}

.search-bar select {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-family: var(--font-primary);
    background: var(--gray-50);
    color: var(--text-secondary);
    outline: none;
    cursor: pointer;
}

/* ─── Auth Pages ─── */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 25% 25%, rgba(124, 58, 237, 0.3), transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(99, 102, 241, 0.2), transparent 50%);
}

.auth-card {
    position: relative;
    width: 100%;
    max-width: 440px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-3xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-2xl);
}

.auth-card .auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-card .auth-header .auth-logo {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-5);
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 900;
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
}

.auth-card h2 {
    font-size: 1.5rem;
    margin-bottom: var(--space-2);
}

.auth-card .auth-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ─── Admin Layout ─── */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--gradient-dark);
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-header .brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: white;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 800;
}

.sidebar-header .brand-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.sidebar-nav {
    padding: var(--space-4);
}

.sidebar-section-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.35);
    padding: var(--space-4) var(--space-3) var(--space-2);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    text-decoration: none;
    margin-bottom: 2px;
}

.sidebar-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.08);
}

.sidebar-link.active {
    color: white;
    background: var(--primary-600);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.sidebar-link i {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: var(--bg-secondary);
}

.admin-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--space-8);
    background: white;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 50;
}

.admin-topbar .topbar-title h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.admin-topbar .topbar-title .breadcrumb {
    display: flex;
    gap: var(--space-2);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.admin-topbar .topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.admin-topbar .admin-profile {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.admin-topbar .admin-profile:hover {
    background: var(--gray-50);
}

.admin-topbar .admin-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
}

.admin-content {
    padding: var(--space-8);
}

/* ─── Dashboard Stats Cards ─── */
.stat-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-card);
}

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

.stat-card .stat-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    font-size: 1.3rem;
}

.stat-card .stat-icon.primary { background: var(--primary-50); color: var(--primary-600); }
.stat-card .stat-icon.success { background: var(--success-50); color: var(--success-600); }
.stat-card .stat-icon.warning { background: var(--warning-50); color: var(--warning-600); }
.stat-card .stat-icon.danger { background: var(--danger-50); color: var(--danger-600); }
.stat-card .stat-icon.info { background: var(--info-50); color: var(--info-600); }
.stat-card .stat-icon.accent { background: var(--accent-50); color: var(--accent-600); }

.stat-card .stat-info .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.stat-card .stat-info .stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ─── Animations ─── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Loading skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

/* ─── Utilities ─── */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-600); }
.text-success { color: var(--success-600); }
.text-danger { color: var(--danger-500); }
.text-white { color: white; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.w-full { width: 100%; }
.hidden { display: none; }
.relative { position: relative; }

.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }

.bg-white { background: white; }
.bg-gradient { background: var(--gradient-primary); }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
}

.empty-state .empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-5);
    background: var(--gray-100);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--gray-400);
}

.empty-state h3 {
    font-size: 1.15rem;
    margin-bottom: var(--space-2);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: var(--space-6);
}
/* ─── Dashboard & Checkout Enhanced System ─── */
.dashboard-header-wrap {
    background: var(--gradient-hero);
    padding: calc(var(--header-height) + var(--space-6)) 0 var(--space-16);
    color: white;
    position: relative;
    overflow: hidden;
}

.dashboard-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    margin-top: -48px;
    position: relative;
    z-index: 10;
    margin-bottom: var(--space-10);
}

.dashboard-kpi-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-light);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.dashboard-kpi-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.12);
}

.kpi-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.empty-showcase-card {
    background: white;
    border-radius: 28px;
    padding: var(--space-12) var(--space-8);
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.empty-showcase-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

/* Checkout 2-Column System */
.checkout-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-8);
    align-items: start;
}

.checkout-order-card {
    background: white;
    border-radius: 28px;
    padding: var(--space-8);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.checkout-pay-card {
    background: white;
    border-radius: 28px;
    padding: var(--space-8);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    position: sticky;
    top: calc(var(--header-height) + var(--space-6));
}

.pay-method-option {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-5);
    margin-bottom: var(--space-4);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
}

.pay-method-option:hover {
    border-color: var(--primary-400);
    background: white;
}

.pay-method-option.selected {
    border-color: var(--primary-600);
    background: white;
    box-shadow: 0 4px 18px rgba(79, 70, 229, 0.15);
}

.pay-method-option.demo-option {
    border-color: #10B981;
    background: #F0FDF4;
}

.pay-method-option.demo-option.selected {
    border-color: #059669;
    background: white;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.2);
}

.pay-badge-recommended {
    position: absolute;
    top: -12px;
    right: 18px;
    background: linear-gradient(135deg, #10B981, #059669);
    color: white;
    font-size: 0.725rem;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.4);
}

.checkout-breakdown-table {
    width: 100%;
    margin-bottom: var(--space-6);
}

.checkout-breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.checkout-breakdown-row.total-row {
    border-top: 2px dashed var(--border-color);
    padding-top: var(--space-4);
    margin-top: var(--space-2);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

.btn-glass-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #FCA5A5;
    border: 1px solid rgba(239, 68, 68, 0.4);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-xl);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-glass-danger:hover {
    background: rgba(239, 68, 68, 0.35);
    color: white;
    border-color: #EF4444;
}

.btn-glass-light {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-xl);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-glass-light:hover {
    background: rgba(255, 255, 255, 0.25);
    color: white;
    border-color: white;
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero-grid { grid-template-columns: 1fr; gap: var(--space-10); }
    .checkout-grid { grid-template-columns: 1fr; }
    .dashboard-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid::before { display: none; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-stats-banner { grid-template-columns: repeat(2, 1fr); }

    .admin-sidebar {
        transform: translateX(-100%);
    }
    .admin-sidebar.open {
        transform: translateX(0);
    }
    .admin-main {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .navbar-nav { display: none; }
    .mobile-toggle { display: flex; }

    .navbar-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: white;
        padding: var(--space-4);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
    }

    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--space-10)) 0 var(--space-10);
    }

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

    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .hero-stat {
        flex: 1;
        min-width: 100px;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

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

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

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-4);
    }

    .search-bar {
        flex-direction: column;
    }

    .search-bar .search-filters {
        width: 100%;
        flex-wrap: wrap;
    }

    .section {
        padding: var(--space-12) 0;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .auth-card {
        padding: var(--space-6);
    }

    .admin-content {
        padding: var(--space-4);
    }

    .category-card {
        flex-direction: column;
        text-align: center;
    }

    .category-card .cat-count {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
    }

    .btn-lg {
        width: 100%;
    }

    .quiz-card .card-thumbnail {
        height: 160px;
    }
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ═════════════════════════════════════════════════════════════════
   DASHBOARD & CHECKOUT ENHANCED STYLING
   ═════════════════════════════════════════════════════════════════ */

/* ─── Glass Buttons ─── */
.btn-glass-light {
    background: rgba(255, 255, 255, 0.16);
    color: #FFFFFF !important;
    border: 1px solid rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--transition-base);
}
.btn-glass-light:hover {
    background: rgba(255, 255, 255, 0.28);
    border-color: rgba(255, 255, 255, 0.45);
    transform: translateY(-2px);
    color: #FFFFFF !important;
}

.btn-glass-danger {
    background: rgba(239, 68, 68, 0.16);
    color: #FECACA !important;
    border: 1px solid rgba(239, 68, 68, 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--transition-base);
}
.btn-glass-danger:hover {
    background: rgba(239, 68, 68, 0.32);
    border-color: rgba(239, 68, 68, 0.55);
    color: #FFFFFF !important;
    transform: translateY(-2px);
}

/* ─── Universal Header & Navbar Clearances ─── */
.page-header {
    padding-top: calc(var(--header-height) + var(--space-8)) !important;
    position: relative;
}

.auth-wrapper {
    padding-top: calc(var(--header-height) + var(--space-6)) !important;
}

main > .section:first-child {
    padding-top: calc(var(--header-height) + var(--space-8));
}

/* ─── Dashboard Header Banner ─── */
.dash-header-wrap {
    background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #311042 100%);
    padding: calc(var(--header-height) + var(--space-8)) 0 calc(var(--space-12) + 42px) 0;
    position: relative;
    overflow: hidden;
    color: white;
}
.dash-header-wrap::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, transparent 70%);
    top: -150px;
    right: -100px;
    pointer-events: none;
}
.dash-header-wrap::after {
    content: '';
    position: absolute;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.18) 0%, transparent 70%);
    bottom: -100px;
    left: 10%;
    pointer-events: none;
}

.dash-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.dash-student-profile {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.dash-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366F1 0%, #A855F7 100%);
    color: white;
    font-size: 1.75rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.15), 0 10px 25px rgba(99, 102, 241, 0.4);
    flex-shrink: 0;
}

.dash-student-name {
    font-size: clamp(1.6rem, 2.5vw, 2.2rem);
    font-weight: 800;
    color: white;
    margin: 0;
    line-height: 1.2;
}

.dash-actions-group {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* ─── Dashboard Stats Grid (Floating over header) ─── */
.dashboard-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    margin-top: -38px;
    position: relative;
    z-index: 5;
    margin-bottom: var(--space-8);
}

@media (max-width: 992px) {
    .dash-header-wrap {
        padding: calc(var(--header-height) + var(--space-6)) 0 calc(var(--space-10) + 32px) 0;
    }
    .dash-header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }
    .dash-actions-group {
        width: 100%;
        justify-content: flex-start;
    }
    .dashboard-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        margin-top: -24px;
    }
}
@media (max-width: 576px) {
    .dash-header-wrap {
        padding: calc(var(--header-height) + var(--space-4)) 0 calc(var(--space-8) + 24px) 0;
    }
    .dashboard-stats-grid {
        grid-template-columns: 1fr;
    }
}

.dashboard-kpi-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-5) var(--space-6);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.dashboard-kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    background: transparent;
    transition: all var(--transition-fast);
}

.dashboard-kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.12);
}

.dashboard-kpi-card.kpi-blue::before { background: #3B82F6; }
.dashboard-kpi-card.kpi-purple::before { background: #8B5CF6; }
.dashboard-kpi-card.kpi-green::before { background: #10B981; }
.dashboard-kpi-card.kpi-amber::before { background: #F59E0B; }

.kpi-icon-wrap {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    flex-shrink: 0;
}

.kpi-blue .kpi-icon-wrap { background: #EFF6FF; color: #2563EB; }
.kpi-purple .kpi-icon-wrap { background: #F5F3FF; color: #7C3AED; }
.kpi-green .kpi-icon-wrap { background: #ECFDF5; color: #059669; }
.kpi-amber .kpi-icon-wrap { background: #FFFBEB; color: #D97706; }

.kpi-info {
    flex: 1;
}

.kpi-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
}

.kpi-subtext {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 3px;
}

/* ─── Dashboard Empty State Showcase ─── */
.empty-showcase-card {
    background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
}

.empty-showcase-header {
    text-align: center;
    max-width: 580px;
    margin: 0 auto var(--space-8) auto;
}

.empty-icon-bubble {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    color: var(--primary-600);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--space-3);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.15);
}

.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-5);
}

.rec-quiz-card {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-xs);
}

.rec-quiz-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-300);
}

/* ═════════════════════════════════════════════════════════════════
   CHECKOUT & PAYMENT STYLING
   ═════════════════════════════════════════════════════════════════ */
.checkout-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-8);
    align-items: start;
}

@media (max-width: 992px) {
    .checkout-grid {
        grid-template-columns: 1fr;
    }
}

.checkout-order-card {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
}

.checkout-specs-pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: var(--space-4) 0 var(--space-6) 0;
}

.checkout-spec-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.checkout-spec-pill i {
    color: var(--primary-600);
}

.features-check-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    margin-bottom: var(--space-6);
}

@media (max-width: 576px) {
    .features-check-grid {
        grid-template-columns: 1fr;
    }
}

.feature-check-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.feature-check-item i {
    color: var(--success-500);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.checkout-user-box {
    background: #FAFAFA;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-4) var(--space-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

/* ─── Right Column Payment Card ─── */
.checkout-pay-card {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--space-7);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 90px;
}

.price-summary-box {
    border-bottom: 1px solid var(--border-light);
    padding-bottom: var(--space-5);
    margin-bottom: var(--space-5);
}

.price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.price-row.total-row {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px dashed var(--border-light);
}

.price-row.total-row .total-amount {
    font-size: 1.85rem;
    font-weight: 900;
    color: var(--primary-700);
}

/* Payment Method Tabs / Options */
.pay-methods-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.pay-method-card {
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    cursor: pointer;
    transition: all var(--transition-base);
    background: #FFFFFF;
}

.pay-method-card.active {
    border-color: var(--primary-600);
    background: #F8FAFC;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.12);
}

.pay-method-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pay-method-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.demo-sub-options {
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: var(--space-2);
}

.demo-sub-badge {
    font-size: 0.75rem;
    padding: 4px 8px;
    background: #EEF2FF;
    color: #4F46E5;
    border-radius: var(--radius-md);
    font-weight: 600;
}