/* ========================================
   GLOBAL STYLES & VARIABLES
   ======================================== */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-purple: linear-gradient(135deg, #a855f7 0%, #7c3aed 100%);
    --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    
    /* Dark Theme */
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ========================================
   PARTICLE BACKGROUND
   ======================================== */
#particles-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(ellipse at top, #1e293b 0%, #0f172a 100%);
}

#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

/* ========================================
   CONTAINER & LAYOUT
   ======================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.logo-section i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 1px;
}

/* ========================================
   PROGRESS DASHBOARD
   ======================================== */
.progress-dashboard {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    animation: fadeIn 0.6s ease-out;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.stat-card {
    background: var(--bg-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s;
}

.stat-card:hover::before {
    left: 100%;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.3);
}

.stat-card i {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'Orbitron', sans-serif;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.progress-bar-container {
    height: 12px;
    background: var(--bg-dark);
    border-radius: 100px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 100px;
    width: 0%;
    transition: width 0.5s ease;
    position: relative;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.6);
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ========================================
   NAVIGATION TABS
   ======================================== */
.nav-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-card);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    min-width: 150px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: 'Poppins', sans-serif;
}

.tab-btn i {
    font-size: 1.2rem;
}

.tab-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

/* ========================================
   TAB CONTENT
   ======================================== */
.tab-content {
    display: none;
    animation: fadeInUp 0.4s ease-out;
}

.tab-content.active {
    display: block;
}

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

/* ========================================
   LEARN SECTION
   ======================================== */
.learn-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
}

.section-title i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.infographic-card h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.leadership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.leadership-style {
    background: var(--bg-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.leadership-style::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.leadership-style:hover::before {
    opacity: 1;
}

.leadership-style:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.style-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    box-shadow: var(--shadow-glow);
}

.leadership-style h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    text-align: center;
}

.leadership-style p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.8;
}

.leadership-style p strong {
    color: var(--primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   INTERACTIVE MATCHING GAME
   ======================================== */
.interactive-matching {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.interactive-matching h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.interactive-matching h3 i {
    background: var(--gradient-warning);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.instruction {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.matching-game {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.situations-column h4,
.drop-zones-column h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--primary);
}

.draggable-item {
    background: var(--bg-dark);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--border-color);
    cursor: grab;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.draggable-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: scale(1.02);
}

.draggable-item:active {
    cursor: grabbing;
    opacity: 0.5;
}

.draggable-item.dragging {
    opacity: 0.3;
}

.drop-zone {
    background: var(--bg-dark);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px dashed var(--border-color);
    min-height: 80px;
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-normal);
}

.drop-zone.drag-over {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
    border-style: solid;
    transform: scale(1.02);
}

.drop-zone i {
    margin-right: var(--spacing-xs);
    color: var(--primary);
}

.dropped-items {
    margin-top: var(--spacing-sm);
}

.dropped-items .draggable-item {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn-primary,
.btn-secondary,
.btn-start-test {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: 'Poppins', sans-serif;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--bg-dark);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    margin-left: var(--spacing-md);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.btn-start-test {
    background: var(--gradient-success);
    color: white;
    font-size: 1.3rem;
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.btn-start-test:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(16, 185, 129, 0.5);
}

.btn-start-test:active {
    transform: translateY(-2px) scale(1.02);
}

.cta-section {
    text-align: center;
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.cta-section h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   CASE STUDY CARD
   ======================================== */
.case-study-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.4s ease-out;
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.case-level {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.case-level.level-1 {
    background: var(--gradient-success);
    color: white;
}

.case-level.level-2 {
    background: var(--gradient-warning);
    color: white;
}

.case-level.level-3 {
    background: var(--gradient-danger);
    color: white;
}

.case-number {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.case-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.case-scenario {
    background: var(--bg-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary);
    line-height: 1.8;
}

.case-scenario p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.case-scenario strong {
    color: var(--text-primary);
    display: block;
    margin-top: var(--spacing-md);
}

.case-scenario ul {
    margin-left: var(--spacing-lg);
    margin-top: var(--spacing-sm);
}

.case-scenario li {
    margin-bottom: var(--spacing-xs);
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.option-card {
    background: var(--bg-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.option-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.5s;
}

.option-card:hover::before {
    left: 100%;
}

.option-card:hover {
    border-color: var(--primary);
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.3);
}

.option-card.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.option-card.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    animation: correctPulse 0.5s ease-out;
}

@keyframes correctPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.option-card.incorrect {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
    animation: shake 0.5s ease-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.option-label {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: var(--spacing-md);
    color: white;
    font-size: 1.1rem;
}

.option-card.correct .option-label {
    background: var(--gradient-success);
}

.option-card.incorrect .option-label {
    background: var(--gradient-danger);
}

.option-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

.feedback-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid;
    animation: fadeInUp 0.4s ease-out;
}

.feedback-section.correct {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
}

.feedback-section.incorrect {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
}

.feedback-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 700;
}

.feedback-header i {
    font-size: 2rem;
}

.feedback-section.correct .feedback-header {
    color: var(--success);
}

.feedback-section.incorrect .feedback-header {
    color: var(--danger);
}

.feedback-content {
    color: var(--text-secondary);
    line-height: 1.8;
}

.feedback-content strong {
    color: var(--text-primary);
    display: block;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.feedback-content ul {
    margin-left: var(--spacing-lg);
    margin-top: var(--spacing-sm);
}

.feedback-content li {
    margin-bottom: var(--spacing-xs);
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xl);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-nav {
    flex: 1;
    min-width: 150px;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: 'Poppins', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn-prev {
    background: var(--bg-dark);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-prev:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateX(-5px);
}

.btn-next {
    background: var(--gradient-primary);
    color: white;
}

.btn-next:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.5);
}

.btn-submit {
    background: var(--gradient-success);
    color: white;
}

.btn-submit:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(16, 185, 129, 0.5);
}

/* ========================================
   REVISION SECTION
   ======================================== */
.revision-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.revision-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

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

.revision-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.revision-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
    color: white;
    box-shadow: var(--shadow-glow);
}

.revision-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--text-primary);
}

.revision-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.revision-card ul {
    list-style: none;
    margin-left: 0;
}

.revision-card li {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-dark);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
    color: var(--text-secondary);
}

.revision-card li strong {
    color: var(--primary);
}

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

.infographic-full h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.matrix-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.matrix-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.matrix-cell {
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.matrix-cell:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.matrix-cell.s1 {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(220, 38, 38, 0.2) 100%);
    border-color: var(--danger);
}

.matrix-cell.s2 {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(217, 119, 6, 0.2) 100%);
    border-color: var(--warning);
}

.matrix-cell.s3 {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(29, 78, 216, 0.2) 100%);
    border-color: var(--info);
}

.matrix-cell.s4 {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.2) 100%);
    border-color: var(--success);
}

.matrix-cell strong {
    display: block;
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.matrix-cell p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.matrix-cell .example {
    font-style: italic;
    color: var(--primary);
    font-weight: 600;
}

.matrix-labels {
    margin-top: var(--spacing-lg);
}

.label-y,
.label-x {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 600;
    margin: var(--spacing-md) 0;
}

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

.memory-aids h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
}

.memory-aids h3 i {
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.memory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.memory-card {
    background: var(--bg-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary);
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}

.memory-card:hover {
    transform: translateX(10px);
    border-color: var(--secondary);
}

.memory-card strong {
    color: var(--primary);
    font-size: 1.2rem;
}

.memory-card em {
    color: var(--text-primary);
    font-style: normal;
    font-weight: 600;
}

/* ========================================
   RESULTS SECTION
   ======================================== */
.results-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.results-summary {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    text-align: center;
}

.final-score {
    font-size: 4rem;
    font-weight: 900;
    font-family: 'Orbitron', sans-serif;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: var(--spacing-lg) 0;
}

.performance-badge {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: white;
}

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

.score-guide h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--text-primary);
}

.score-levels {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.score-level {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    background: var(--bg-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.score-level:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.level-badge {
    min-width: 100px;
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: white;
    font-weight: 700;
}

.score-level.beginner .level-badge {
    background: var(--gradient-danger);
}

.score-level.intermediate .level-badge {
    background: var(--gradient-warning);
}

.score-level.advanced .level-badge {
    background: var(--gradient-blue);
}

.score-level.expert .level-badge {
    background: var(--gradient-success);
}

.level-badge i {
    display: block;
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.level-content h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.level-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.level-content p strong {
    color: var(--primary);
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .matching-game {
        grid-template-columns: 1fr;
    }
    
    .matrix-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
    }
    
    .leadership-grid {
        grid-template-columns: 1fr;
    }
    
    .navigation-buttons {
        flex-direction: column;
    }
    
    .btn-nav {
        width: 100%;
    }
    
    .score-level {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.2rem;
    }
    
    .logo-section i {
        font-size: 2rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .final-score {
        font-size: 3rem;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.hidden {
    display: none !important;
}

.disabled {
    opacity: 0.5;
    pointer-events: none;
}

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

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}