/* Error Message Styles */
.error-message {
    background: #2d1b1b;
    border: 1px solid #e53e3e;
    color: #fbb6ce;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    text-align: center;
    font-weight: 500;
}

.answer-options .error-message {
    margin: 2rem 0;
    padding: 2rem;
    font-size: 1.1rem;
}

/* Reset and Base Styles */
:root {
    --vh: 1vh;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* Prevent text selection on the entire website */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #F9FAFB;
    background: #111827;
    min-height: 100vh;
    /* Prevent text selection */
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    /* Prevent copy shortcuts */
    -webkit-context-menu: none;
}

/* Disable context menu */
body {
    -webkit-context-menu: none;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 12px;
}

/* Page Management */
.page {
    display: none;
    min-height: 100vh;
    animation: fadeIn 0.5s ease-in-out;
    padding: 0.5rem 0;
}

.page.active {
    display: block;
}

/* Improved screen fit */
.main-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 120px);
    min-height: calc(var(--vh, 1vh) * 100 - 120px);
    padding: 1rem 0;
}

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

/* Import Premium Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* Modern Header Design */
.modern-header {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.15) 0%, 
        rgba(255, 255, 255, 0.05) 100%);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 14px;
    padding: 0.875rem 1.5rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 
        0 6px 24px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.modern-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        #ff6b6b 0%, 
        #4ecdc4 25%, 
        #45b7d1 50%, 
        #96ceb4 75%, 
        #feca57 100%);
    opacity: 0.8;
}

.modern-header::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, 
        rgba(255, 255, 255, 0.1) 0%, 
        transparent 70%);
    animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { transform: translate(-50%, -50%) rotate(0deg); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) rotate(180deg); opacity: 0.1; }
}

.brand-container {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    position: relative;
    z-index: 1;
}

.brand-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 
        0 4px 16px rgba(37, 99, 235, 0.35),
        0 2px 6px rgba(0, 0, 0, 0.15);
    position: relative;
    animation: iconPulse 3s ease-in-out infinite;
}

.brand-icon::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #2563EB, #F59E0B, #2563EB);
    border-radius: 14px;
    z-index: -1;
    animation: borderRotate 3s linear infinite;
}

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

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

.brand-content {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-title h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0;
    line-height: 1.1;
}

.brand-company {
    background: linear-gradient(135deg, #2563EB, #F59E0B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    text-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.brand-certification {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
    opacity: 0.95;
    background: linear-gradient(135deg, #2563EB, #F59E0B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.brand-subtitle {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    margin-top: 0.1rem;
    letter-spacing: 0.02em;
}

.certification-badge {
    background: linear-gradient(135deg, 
        rgba(245, 158, 11, 0.9) 0%, 
        rgba(217, 119, 6, 0.9) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 0.4rem 0.875rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: #111827;
    font-weight: 700;
    font-size: 0.75rem;
    box-shadow: 
        0 3px 12px rgba(245, 158, 11, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    animation: badgeGlow 2s ease-in-out infinite alternate;
}

@keyframes badgeGlow {
    0% { 
        box-shadow: 
            0 4px 16px rgba(245, 158, 11, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.3);
    }
    100% { 
        box-shadow: 
            0 6px 24px rgba(245, 158, 11, 0.5),
            inset 0 1px 0 rgba(255, 255, 255, 0.4);
    }
}

.badge-icon {
    font-size: 0.8rem;
    animation: bounce 1.5s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

.header-decorations {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    display: flex;
    gap: 0.5rem;
}

.decoration-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    animation: dotPulse 2s ease-in-out infinite;
}

.decoration-dot:nth-child(2) {
    animation-delay: 0.3s;
}

.decoration-dot:nth-child(3) {
    animation-delay: 0.6s;
}

@keyframes dotPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.2); }
}

/* Mobile Responsive - Primary 768px breakpoint */
@media (max-width: 768px) {
    .container {
        padding: 0 12px;
        max-width: 100%;
        margin: 0 auto;
    }
    
    .page {
        min-height: 100vh;
        padding: 0.5rem 0;
    }
    
    .hero-section,
    .question-container {
        padding: 1.2rem;
        margin: 0.75rem 0;
        border-radius: 12px;
    }
    
    .question-container {
        max-height: calc(75vh - 75px);
        min-height: calc(75vh - 75px);
    }
    
    .modern-header {
        padding: 0.75rem 1.25rem;
        margin-bottom: 1.5rem;
        border-radius: 12px;
    }
    
    .brand-container {
        flex-direction: column;
        text-align: center;
        gap: 0.625rem;
    }
    
    .brand-content {
        flex-direction: column;
        gap: 0.625rem;
        align-items: center;
    }
    
    .brand-icon {
        width: 40px;
        height: 40px;
    }
    
    .brand-title h1 {
        font-size: 1.25rem;
        text-align: center;
    }
    
    .brand-certification {
        font-size: 1.25rem;
    }
    
    .certification-badge {
        padding: 0.35rem 0.7rem;
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .modern-header {
        padding: 0.625rem 1rem;
        border-radius: 10px;
    }
    
    .brand-icon {
        width: 36px;
        height: 36px;
    }
    
    .brand-title h1 {
        font-size: 1.125rem;
    }
    
    .brand-certification {
        font-size: 1.125rem;
    }
}

/* Home Page Styles */
.header {
    text-align: center;
    padding: 1rem 0;
    display: none; /* Hidden in favor of modern-header */
}

.logo h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-section {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    max-width: 700px;
    width: 100%;
    border: 1px solid #374151;
}

.hero-section h2 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #F9FAFB;
}

.description {
    font-size: 1rem;
    color: #9CA3AF;
    margin-bottom: 2rem;
    line-height: 1.7;
}

/* Mock Selection Styles */
.mock-selection {
    margin-bottom: 1.5rem;
}

.mock-selection h3 {
    font-size: 1.1rem;
    color: #F9FAFB;
    margin-bottom: 0.8rem;
}

.mock-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    justify-content: center;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
}

.mock-btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid #374151;
    border-radius: 8px;
    background: #111827;
    color: #9CA3AF;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 70px;
}

.mock-btn:hover {
    border-color: #2563EB;
    background: #1F2937;
    transform: translateY(-1px);
}

.mock-btn.active {
    background: linear-gradient(135deg, #2563EB, #1D4ED8);
    color: white;
    border-color: #2563EB;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.exam-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: #111827;
    border-radius: 16px;
    border: 1px solid #374151;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.exam-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2563EB, #1D4ED8, #F59E0B);
}

.info-item {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.info-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

.info-label {
    display: block;
    font-size: 0.75rem;
    color: #9CA3AF;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.info-value {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    color: #F9FAFB;
    background: linear-gradient(135deg, #2563EB, #F59E0B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Add icons to info items */
.info-item[data-type="questions"]::before {
    content: "📝";
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
    display: block;
}

.info-item[data-type="time"]::before {
    content: "⏱️";
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
    display: block;
}

.info-item[data-type="score"]::before {
    content: "🎯";
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
    display: block;
}

/* Button Styles */
.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    min-width: 100px;
}

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

.btn-primary {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: white;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-primary:disabled {
    background: #374151;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: #374151;
    color: #F9FAFB;
    border: 1px solid #4B5563;
}

.btn-secondary:hover {
    background: #1F2937;
    transform: translateY(-1px);
}

.btn-warning {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: white;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
    background: linear-gradient(135deg, #D97706, #B45309);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(237, 137, 54, 0.4);
}

/* Question Page Styles */
.exam-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    margin: 0.5rem 0;
    padding: 0.75rem 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    border: 1px solid #374151;
}

.exam-progress {
    flex: 1;
    margin-right: 1rem;
}

#question-counter {
    display: block;
    font-weight: 500;
    color: #F9FAFB;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #374151;
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #2563EB, #1D4ED8);
    transition: width 0.3s ease;
    border-radius: 4px;
}

.timer {
    text-align: right;
}

.timer-label {
    display: block;
    font-size: 0.8rem;
    color: #9CA3AF;
    margin-bottom: 0.2rem;
}

.timer-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: #e53e3e;
}

.timer-value.warning {
    animation: pulse 1s infinite;
}

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

/* Question Content */
.question-content {
    padding: 1rem 0;
}

.question-container {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    max-height: calc(100vh - 100px);
    height: auto;
    min-height: calc(90vh - 100px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-width: 750px;
    margin: 0 auto;
    border: 1px solid #374151;
}

.question-text {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.8rem;
    line-height: 1.4;
    color: #F9FAFB;
    flex-shrink: 0;
    padding: 0.8rem;
    background: #1F2937;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    border: 1px solid #374151;
}

.question-type {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-right: 0.8rem;
    margin-bottom: 0.4rem;
}

.question-type.single-choice {
    background: #e6fffa;
    color: #234e52;
    border: 1px solid #81e6d9;
}

.question-type.multiple-choice {
    background: #2d3748;
    color: #f6ad55;
    border: 1px solid #f6ad55;
}

.answer-options {
    margin-bottom: 1.5rem;
    flex: 1;
    overflow-y: auto;
    max-height: calc(100vh - 350px);
    min-height: 180px;
}

.answer-option {
    display: flex;
    align-items: center;
    padding: 0.7rem 1rem;
    margin-bottom: 0.6rem;
    background: #111827;
    border: 2px solid #374151;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.answer-option:hover {
    background: #1F2937;
    border-color: #4B5563;
}

.answer-option.selected {
    background: #1E3A8A;
    border-color: #2563EB;
}

.answer-option input[type="radio"] {
    margin-right: 0.8rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.answer-option input[type="checkbox"] {
    margin-right: 0.8rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #2563EB;
}

/* Different styling for multiple choice questions */
.answer-option:has(input[type="checkbox"]) {
    border-left: 4px solid #2563EB;
}

.answer-option:has(input[type="checkbox"]).selected {
    background: #2d4a3d;
    border-color: #319795;
    border-left-color: #319795;
}

.answer-option label {
    flex: 1;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.3;
    color: #F9FAFB;
}

.question-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
    margin-top: auto;
    padding-top: 0;
}

.nav-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Results Page Styles */
.results-header {
    text-align: center;
    padding: 1rem 0 0.5rem;
    position: relative;
}

.results-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #2563EB, #1D4ED8);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.results-header h1 {
    color: #F9FAFB;
    font-size: 2rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 0.25rem;
}

.results-subtitle {
    color: #a0aec0;
    font-size: 1rem;
    margin: 0;
}

.results-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 0.5rem 0 0.5rem;
}

/* Performance Overview */
.performance-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    width: 100%;
    max-width: 1000px;
}

/* Medium screens optimization */
@media (min-width: 769px) and (max-width: 999px) {
    .performance-overview {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.2rem;
    }
    
    .performance-insights {
        order: 3;
        grid-column: 1 / -1;
    }
    
    .results-actions {
        order: 4;
    }
}

/* Wider screens - more efficient layout */
@media (min-width: 1000px) {
    .performance-overview {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        max-width: 1200px;
    }
}

.score-card {
    background: linear-gradient(145deg, #1F2937 0%, #111827 100%);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 
        0 15px 30px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.score-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #4299e1, #3182ce, #2c5282);
}

.score-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    width: 100%;
}

.score-card-header h3 {
    color: #F9FAFB;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.score-trend {
    color: #48bb78;
    opacity: 0.8;
}

.score-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 100%;
}

/* Progress Ring */
.score-circle {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-background {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 5;
}

.progress-ring-foreground {
    fill: none;
    stroke: url(#scoreGradient);
    stroke-width: 5;
    stroke-linecap: round;
    stroke-dasharray: 214;
    stroke-dashoffset: 214;
    transition: stroke-dashoffset 2s ease-in-out;
}

.score-text {
    position: absolute;
    text-align: center;
}

.score-number {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    color: #F9FAFB;
}

.score-label {
    color: #9CA3AF;
    font-size: 0.75rem;
}

/* Pass Status */
.pass-status {
    text-align: center;
    width: 100%;
}

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.5rem 0.6rem;
    border-radius: 8px;
    margin-bottom: 0.3rem;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 0.8rem;
}

.status-indicator.passed {
    background: rgba(72, 187, 120, 0.2);
    color: #48bb78;
    border: 1px solid rgba(72, 187, 120, 0.3);
}

.status-indicator.failed {
    background: rgba(229, 62, 62, 0.2);
    color: #e53e3e;
    border: 1px solid rgba(229, 62, 62, 0.3);
}

.pass-requirement {
    color: #9CA3AF;
    font-size: 0.7rem;
    margin: 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-rows: repeat(2, 1fr);
    gap: 0.8rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-card.correct .stat-icon {
    background: rgba(72, 187, 120, 0.2);
    color: #48bb78;
}

.stat-card.incorrect .stat-icon {
    background: rgba(229, 62, 62, 0.2);
    color: #e53e3e;
}

.stat-card.total .stat-icon {
    background: rgba(66, 153, 225, 0.2);
    color: #4299e1;
}

.stat-card.time .stat-icon {
    background: rgba(159, 122, 234, 0.2);
    color: #9f7aea;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: #F9FAFB;
    line-height: 1.2;
}

.stat-label {
    color: #9CA3AF;
    font-size: 0.8rem;
}

.results-actions {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    max-width: 600px;
}

.results-actions .btn {
    padding: 0.75rem 1.2rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    min-width: 140px;
    justify-content: center;
    font-size: 0.9rem;
}

.results-actions .btn-primary {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    border: none;
    color: white;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.results-actions .btn-primary:hover {
    background: linear-gradient(135deg, #D97706, #B45309);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 153, 225, 0.4);
}

.results-actions .btn-outline {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: #F9FAFB;
}

.results-actions .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.results-actions .btn-secondary {
    background: rgba(159, 122, 234, 0.2);
    border: 2px solid rgba(159, 122, 234, 0.3);
    color: #9f7aea;
}

.results-actions .btn-secondary:hover {
    background: rgba(159, 122, 234, 0.3);
    border-color: rgba(159, 122, 234, 0.4);
    transform: translateY(-2px);
}

/* Detailed Review */
.detailed-review {
    width: 100%;
    max-width: 1600px;
    background: linear-gradient(145deg, #1F2937 0%, #111827 100%);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.review-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.review-header h3 {
    color: #F9FAFB;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.review-header p {
    color: #9CA3AF;
    margin: 0;
}

.review-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Detailed Answers - Updated to match new structure */
.answer-review-item {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.answer-review-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.review-question {
    background: linear-gradient(135deg, #1F2937, #374151);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #F9FAFB;
    font-size: 1.05rem;
}

.user-selection-summary {
    padding: 1rem 1.5rem;
    margin: 0;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-selection-summary::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.user-selection-summary.correct {
    background: rgba(72, 187, 120, 0.15);
    color: #68d391;
    border-left: 4px solid #48bb78;
}

.user-selection-summary.correct::before {
    background: #48bb78;
}

.user-selection-summary.incorrect {
    background: rgba(229, 62, 62, 0.15);
    color: #fc8181;
    border-left: 4px solid #e53e3e;
}

.user-selection-summary.incorrect::before {
    background: #e53e3e;
}

.user-selection-summary.unanswered {
    background: #3d2b1f;
    border-color: #f6ad55;
    color: #f6ad55;
}

.review-answers {
    padding: 1.5rem;
    background: #1F2937;
}

.review-answer {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    font-size: 0.95rem;
    color: #F9FAFB;
}

.review-answer.correct {
    background: #2d5a3d;
    border: 1px solid #68d391;
    color: #9ae6b4;
}

.review-answer.user-incorrect {
    background: #2d1b1b;
    border: 1px solid #fc8181;
    color: #fbb6ce;
}

.review-answer.not-selected {
    background: #2d3748;
    color: #9CA3AF;
    border: 1px solid #374151;
}

.review-answer.unanswered {
    background: #3d2b1f;
    color: #f6ad55;
    border: 1px solid #f6ad55;
}

.review-status {
    margin-top: 0.5rem;
    padding: 0.5rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}

.review-status.correct {
    background: #2d5a3d;
    color: #9ae6b4;
}

.review-status.incorrect {
    background: #2d1b1b;
    color: #fbb6ce;
}

.review-status.unanswered {
    background: #3d2b1f;
    color: #f6ad55;
}

.review-explanation {
    margin-top: 1rem;
    padding: 1rem;
    background: #2a4365;
    border-radius: 8px;
    font-size: 0.95rem;
    line-height: 1.6;
    color: #F9FAFB;
    border: 1px solid #2563EB;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* Medium screens */
@media (max-width: 1024px) {
    .container {
        max-width: 750px;
        padding: 0 12px;
    }
    
    .question-container {
        max-width: 700px;
        padding: 1rem;
    }
    
    .question-text {
        font-size: 1.05rem;
        padding: 0.8rem;
    }
    
    .answer-option {
        padding: 0.7rem 1rem;
    }
}

/* Mobile-First Responsive Design */
/* Enhanced Touch Interactions */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .mock-btn,
    .answer-option {
        min-height: 44px; /* iOS recommendation for touch targets */
        padding: 0.75rem 1rem;
    }
    
    .mock-btn {
        min-width: 80px;
    }
    
    .answer-option {
        padding: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .question-navigation .btn {
        min-height: 48px;
        font-size: 0.95rem;
    }

/* Small Mobile Devices (320px - 479px) */
@media (max-width: 479px) {
    body {
        font-size: 14px;
    }
    
    .container {
        padding: 0 10px;
        max-width: 100%;
    }
    
    .header {
        padding: 0.75rem 0;
    }
    
    .logo h1 {
        font-size: 1.3rem;
        line-height: 1.2;
    }
    
    .hero-section {
        padding: 1rem;
        margin: 0.5rem 0;
        border-radius: 12px;
    }
    
    .hero-section h2 {
        font-size: 1.3rem;
        margin-bottom: 1rem;
    }
    
    .mock-selection h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .mock-options {
        gap: 0.4rem;
        margin-bottom: 1rem;
    }
    
    .mock-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.8rem;
        min-width: 65px;
        border-radius: 6px;
    }
    
    .exam-info {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 1rem;
        margin: 0 0.5rem 1rem 0.5rem;
        max-width: calc(100% - 1rem);
    }
    
    .info-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem;
        background: rgba(255, 255, 255, 0.02);
        border-radius: 8px;
        border: 1px solid rgba(255, 255, 255, 0.08);
    }
    
    .info-item:hover {
        transform: none;
        box-shadow: none;
    }
    
    .info-label {
        font-size: 0.8rem;
        margin-bottom: 0;
        text-align: left;
    }
    
    .info-value {
        font-size: 1.1rem;
        text-align: right;
    }
    }
    
    .info-value {
        font-size: 1rem;
        font-weight: 600;
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
        border-radius: 8px;
        min-height: 44px;
    }
    
    #start-exam-btn {
        width: 100%;
        margin-top: 0.5rem;
    }
    
    /* Hero Section Mobile */
    .hero-section,
    .question-container,
    .score-summary {
        padding: 1.2rem;
        margin: 0.75rem 0;
    }
    
    /* Reduce question container height to 3/4 on mobile */
    .question-container {
        max-height: calc(75vh - 75px);
        min-height: calc(75vh - 75px);
    }
    
    .logo h1 {
        font-size: 1.5rem;
        text-align: center;
        padding: 0.5rem 0;
    }
    
    .hero-section h2 {
        font-size: 1.4rem;
        margin-bottom: 1.25rem;
    }
    
    .mock-options {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
        margin-bottom: 1.25rem;
    }
    
    .mock-btn {
        padding: 0.6rem 0.4rem;
        font-size: 0.85rem;
        min-height: 44px;
    }
    
    .exam-info {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        padding: 1.25rem;
        margin: 0 1rem 1.25rem 1rem;
        max-width: calc(100% - 2rem);
    }
    
    .info-item {
        padding: 0.75rem;
        border-radius: 8px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 0;
        border-bottom: 1px solid #374151;
    }
    
    .info-item:last-child {
        border-bottom: none;
    }
    
    .info-label {
        font-size: 0.7rem;
    }
    
    .info-value {
        font-size: 1.2rem;
    }
}
    
    /* Question Page Mobile Optimizations */
    .question-text {
        font-size: 1rem;
        padding: 1rem;
        line-height: 1.5;
    }
    
    .exam-header {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
        padding: 1rem;
        margin: 0.5rem 0;
    }
    
    .exam-progress {
        margin-right: 0;
        width: 100%;
    }
    
    #question-counter {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
    
    .progress-bar {
        height: 8px;
        margin-bottom: 0.75rem;
    }
    
    .timer {
        text-align: center;
    }
    
    .timer-label {
        font-size: 0.9rem;
    }
    
    .timer-value {
        font-size: 1.3rem;
        font-weight: 700;
    }
    
    /* Answer Options Mobile */
    .answer-options {
        margin-bottom: 1.5rem;
        padding: 0.5rem 0;
    }
    
    .answer-option {
        padding: 1rem;
        margin-bottom: 0.75rem;
        border-radius: 10px;
        min-height: 60px;
        align-items: flex-start;
    }
    
    .answer-option input[type="radio"],
    .answer-option input[type="checkbox"] {
        margin-right: 1rem;
        margin-top: 0.25rem;
        flex-shrink: 0;
    }
    
    .answer-option label {
        font-size: 0.95rem;
        line-height: 1.4;
        cursor: pointer;
    }
    
    /* Navigation Mobile */
    .question-navigation {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0;
        margin-top: 0;
    }
    
    .nav-buttons {
        order: 2;
        width: 100%;
        justify-content: space-between;
        gap: 0.75rem;
    }
    
    .nav-buttons .btn {
        flex: 1;
        min-height: 48px;
        font-size: 0.9rem;
    }
    
    #stop-exam-btn {
        order: 1;
        width: 100%;
        margin-bottom: 0.5rem;
        background: linear-gradient(135deg, #e53e3e, #c53030);
        min-height: 48px;
    }
    
    #submit-exam-btn {
        order: 3;
        width: 100%;
        margin-top: 0.5rem;
        min-height: 48px;
    }
    
    /* Results Page Mobile */
    .performance-overview {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .score-details {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .score-circle {
        width: 70px;
        height: 70px;
        margin: 0 auto 0.8rem;
    }
    
    .score-circle svg {
        width: 70px;
        height: 70px;
    }
    
    .score-circle svg circle {
        r: 30;
        cx: 35;
        cy: 35;
    }
    
    .results-content {
        gap: 1.2rem;
        padding: 0.5rem 0 0.5rem;
    }
    
    .score-number {
        font-size: 1.2rem;
    }
    
    .score-item .score-value {
        font-size: 1.3rem;
    }
    
    .results-actions {
        flex-direction: column;
        gap: 0.6rem;
        width: 100%;
    }
    
    .results-actions .btn {
        width: 100%;
        min-height: 44px;
        font-size: 0.9rem;
    }
    
    .detailed-answers {
        padding: 1rem;
        margin-top: 0.8rem;
    }
    
    .detailed-answers h3 {
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }
    
    .answer-review-item {
        margin-bottom: 1rem;
    }
    
    .review-question {
        padding: 0.8rem;
        font-size: 0.9rem;
        line-height: 1.4;
    }
    
    .review-answers {
        padding: 0.8rem;
    }
    
    .review-answer {
        padding: 0.6rem;
        margin-bottom: 0.6rem;
        font-size: 0.85rem;
    }
    
    .review-explanation {
        padding: 0.8rem;
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

/* Very Small Mobile Devices */
@media (max-width: 360px) {
    .container {
        padding: 0 8px;
    }
    
    .hero-section,
    .question-container,
    .score-summary {
        padding: 0.75rem;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .hero-section h2 {
        font-size: 1.1rem;
    }
    
    .mock-options {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.4rem;
    }
    
    .mock-btn {
        padding: 0.5rem 0.3rem;
        font-size: 0.75rem;
    }
    
    .exam-info {
        margin: 0 0.25rem 1rem 0.25rem;
        max-width: calc(100% - 0.5rem);
        padding: 0.75rem;
        gap: 0.4rem;
    }
    
    .info-item {
        padding: 0.5rem;
    }
    
    .info-label {
        font-size: 0.75rem;
    }
    
    .info-value {
        font-size: 1rem;
    }
    
    .question-text {
        font-size: 0.9rem;
        padding: 0.75rem;
    }
    
    .answer-option {
        padding: 0.75rem;
        min-height: 50px;
    }
    
    .answer-option label {
        font-size: 0.85rem;
    }
    
    .nav-buttons .btn {
        font-size: 0.8rem;
        padding: 0.6rem 0.5rem;
    }
    
    .score-circle {
        width: 100px;
        height: 100px;
    }
    
    .score-number {
        font-size: 1.75rem;
    }
}

/* Enhanced Mobile Interactions */
@media (max-width: 768px) {
    /* Improve touch targets */
    .btn, .mock-btn, .answer-option {
        min-height: 44px;
    }
    
    /* Better spacing for fingers */
    .answer-options {
        padding: 0;
    }
    
    .answer-option {
        margin-bottom: 0.75rem;
    }
    
    /* Prevent zoom on input focus */
    input, select, textarea {
        font-size: 16px;
    }
    
    /* Better modal experience */
    .feedback-modal-content,
    .stop-modal-content,
    .issue-modal-content {
        width: 95%;
        margin: 1rem;
        max-height: 85vh;
    }
    
    /* Sticky navigation for better UX */
    .question-navigation {
        position: sticky;
        bottom: 0;
        background: rgba(45, 55, 72, 0.98);
        backdrop-filter: blur(10px);
        border-top: 1px solid #374151;
        margin: 0 -1.2rem -1.2rem -1.2rem;
        padding: 1rem 1.2rem;
        border-radius: 0 0 12px 12px;
    }
}

/* Landscape Mobile Optimizations */
@media (max-width: 768px) and (orientation: landscape) {
    .question-container {
        max-height: calc(75vh - 60px);
        min-height: calc(75vh - 60px);
    }
    
    .answer-options {
        max-height: calc(75vh - 225px);
        overflow-y: auto;
    }
    
    .exam-header {
        flex-direction: row;
        padding: 0.5rem 1rem;
    }
    
    .exam-progress {
        margin-right: 1rem;
        width: auto;
        flex: 1;
    }
    
    .timer {
        text-align: right;
        flex-shrink: 0;
    }
    
    .question-text {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
    
    .answer-option {
        padding: 0.6rem 0.8rem;
        margin-bottom: 0.5rem;
        min-height: 40px;
    }
    
    .question-navigation {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(45, 55, 72, 0.98);
        backdrop-filter: blur(10px);
        border-top: 1px solid #4a5568;
        margin: 0;
        padding: 0.6rem 1rem;
        border-radius: 0;
        flex-direction: row;
        gap: 0.6rem;
        z-index: 1000;
    }
    
    .nav-buttons {
        order: 2;
        flex: 1;
        display: flex;
        gap: 0.5rem;
    }
    
    #stop-exam-btn {
        order: 1;
        flex-shrink: 0;
        width: auto;
        margin: 0;
    }
    
    #submit-exam-btn {
        order: 3;
        flex-shrink: 0;
        width: auto;
        margin: 0;
    }
    
    /* Adjust container padding for fixed navigation */
    .question-content {
        padding-bottom: 70px;
    }
}

/* iPad and Tablet Optimizations */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 900px;
        padding: 0 20px;
    }
    
    .hero-section {
        padding: 2.5rem;
    }
    
    .question-container {
        padding: 1.5rem;
    }
    
    .mock-options {
        grid-template-columns: repeat(6, 1fr);
        gap: 0.75rem;
    }
    
    .answer-option {
        padding: 1rem 1.25rem;
    }
}

/* ========================================
   ENHANCED MOBILE NATIVE APP EXPERIENCE
   ======================================== */

/* Mobile-First Base Improvements */
@media (max-width: 768px) {
    /* Remove default margins and ensure full-width */
    body {
        margin: 0;
        padding: 0;
        overflow-x: hidden;
    }
    
    .container {
        padding: 0 12px;
        max-width: 100%;
        margin: 0 auto;
    }
    
    /* Native app-style hero section */
    .hero-section {
        padding: 1.5rem 1rem;
        margin: 0;
        border-radius: 0;
        background: linear-gradient(135deg, #111827 0%, #1F2937 100%);
        border: none;
        box-shadow: none;
        max-width: none;
        width: 100%;
        flex: 1;
    }
    
    /* Large, touch-friendly mock exam selection */
    .mock-selection h3 {
        font-size: 1.1rem;
        margin-bottom: 1rem;
        text-align: center;
    }
    
    .mock-options {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }
    
    .mock-btn {
        padding: 1rem 0.75rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 56px;
        border-radius: 12px;
        transition: all 0.2s ease;
        background: linear-gradient(135deg, #374151 0%, #4B5563 100%);
        border: 2px solid transparent;
    }
    
    .mock-btn.active {
        background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
        border-color: #3B82F6;
        transform: scale(1.02);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }
    
    .mock-btn:hover,
    .mock-btn:focus {
        transform: translateY(-1px);
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    }
    
    /* Full-width exam info cards */
    .exam-info {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        padding: 0;
        margin: 1.5rem 0;
        max-width: none;
        background: none;
        border-radius: 0;
        box-shadow: none;
    }
    
    .info-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1.25rem;
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border-radius: 12px;
        border: 1px solid #4B5563;
        margin: 0;
    }
    
    .info-item:hover {
        background: linear-gradient(135deg, #374151 0%, #4B5563 100%);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
    
    .info-label {
        font-size: 0.9rem;
        font-weight: 500;
        color: #9CA3AF;
    }
    
    .info-value {
        font-size: 1.3rem;
        font-weight: 700;
        color: #F9FAFB;
    }
    
    /* Large, prominent start button */
    #start-exam-btn {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1.1rem;
        font-weight: 700;
        min-height: 64px;
        border-radius: 16px;
        margin-top: 2rem;
        background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
        border: none;
        box-shadow: 0 8px 24px rgba(245, 158, 11, 0.3);
        transition: all 0.3s ease;
    }
    
    #start-exam-btn:hover,
    #start-exam-btn:focus {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(245, 158, 11, 0.4);
        background: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%);
    }
    
    /* QUESTION PAGE MOBILE NATIVE EXPERIENCE */
    
    /* Sticky header for better navigation */
    .exam-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(17, 24, 39, 0.95);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid #374151;
        padding: 1rem;
        margin: 0;
        flex-direction: column;
        gap: 1rem;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }
    
    .exam-progress {
        width: 100%;
        margin: 0;
    }
    
    #question-counter {
        font-size: 1.1rem;
        font-weight: 600;
        text-align: center;
        margin-bottom: 0.75rem;
        color: #F9FAFB;
    }
    
    .progress-bar {
        height: 8px;
        background: #374151;
        border-radius: 8px;
        overflow: hidden;
        margin-bottom: 1rem;
    }
    
    .progress-fill {
        height: 100%;
        background: linear-gradient(90deg, #2563EB 0%, #3B82F6 100%);
        border-radius: 8px;
        transition: width 0.3s ease;
    }
    
    .timer {
        text-align: center;
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        padding: 0.75rem 1rem;
        border-radius: 12px;
        border: 1px solid #4B5563;
    }
    
    .timer-label {
        font-size: 0.9rem;
        color: #9CA3AF;
        margin-bottom: 0.25rem;
        display: block;
    }
    
    .timer-value {
        font-size: 1.4rem;
        font-weight: 700;
        color: #F9FAFB;
    }
    
    /* Full-screen question container */
    .question-content {
        flex: 1;
        padding: 0;
        margin: 0;
        background: #111827;
    }
    
    .question-container {
        padding: 1.5rem 1rem;
        margin: 0;
        border-radius: 0;
        background: none;
        box-shadow: none;
        border: none;
        max-height: none;
        min-height: calc(100vh - 200px);
        display: flex;
        flex-direction: column;
    }
    
    .question-text {
        font-size: 1.1rem;
        line-height: 1.6;
        padding: 1.5rem;
        margin-bottom: 1.5rem;
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border-radius: 16px;
        border: 1px solid #4B5563;
        color: #F9FAFB;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    
    /* Touch-optimized answer options */
    .answer-options {
        flex: 1;
        padding: 0;
        margin-bottom: 0;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }
    
    .answer-option {
        padding: 1.25rem 1rem;
        margin: 0;
        border-radius: 16px;
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border: 2px solid #4B5563;
        min-height: 68px;
        display: flex;
        align-items: center;
        transition: all 0.2s ease;
        cursor: pointer;
        position: relative;
    }
    
    .answer-option:hover {
        background: linear-gradient(135deg, #374151 0%, #4B5563 100%);
        border-color: #6B7280;
        transform: translateY(-1px);
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
    }
    
    .answer-option.selected {
        background: linear-gradient(135deg, #2563EB 0%, #3B82F6 100%);
        border-color: #60A5FA;
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
    }
    
    .answer-option.correct {
        background: linear-gradient(135deg, #059669 0%, #10B981 100%);
        border-color: #34D399;
        box-shadow: 0 6px 20px rgba(5, 150, 105, 0.3);
    }
    
    .answer-option.incorrect {
        background: linear-gradient(135deg, #DC2626 0%, #EF4444 100%);
        border-color: #F87171;
        box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
    }
    
    .answer-option input[type="radio"],
    .answer-option input[type="checkbox"] {
        width: 24px;
        height: 24px;
        margin-right: 1rem;
        margin-top: 0;
        flex-shrink: 0;
        accent-color: #2563EB;
    }
    
    .answer-option label {
        font-size: 1rem;
        line-height: 1.5;
        color: #F9FAFB;
        font-weight: 500;
        cursor: pointer;
        flex: 1;
        user-select: none;
    }
    
    /* Bottom sticky navigation */
    .question-navigation {
        position: sticky;
        bottom: 0;
        background: rgba(17, 24, 39, 0.98);
        backdrop-filter: blur(20px);
        border-top: 1px solid #374151;
        padding: 1.25rem 1rem;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
        z-index: 100;
    }
    
    /* Navigation buttons row */
    .nav-buttons {
        display: flex;
        gap: 1rem;
        order: 1;
    }
    
    .nav-buttons .btn {
        flex: 1;
        padding: 1rem 1.5rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 56px;
        border-radius: 12px;
        border: none;
        transition: all 0.2s ease;
    }
    
    #prev-question-btn {
        background: linear-gradient(135deg, #374151 0%, #4B5563 100%);
        color: #F9FAFB;
    }
    
    #next-question-btn {
        background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
        color: white;
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }
    
    #next-question-btn:disabled {
        background: linear-gradient(135deg, #4B5563 0%, #6B7280 100%);
        box-shadow: none;
        opacity: 0.6;
    }
    
    /* Stop exam button */
    #stop-exam-btn {
        order: 2;
        width: 100%;
        padding: 1rem 1.5rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 56px;
        border-radius: 12px;
        background: linear-gradient(135deg, #DC2626 0%, #B91C1C 100%);
        border: none;
        color: white;
        box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
    }
    
    #submit-exam-btn {
        order: 3;
        width: 100%;
        padding: 1rem 1.5rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 56px;
        border-radius: 12px;
        background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
        border: none;
        color: white;
        box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
    }
    
    /* Button hover effects */
    .question-navigation .btn:hover:not(:disabled) {
        transform: translateY(-1px);
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    }
    
    /* RESULTS PAGE MOBILE NATIVE EXPERIENCE */
    
    #results-page .container {
        padding: 0;
        background: #111827;
        min-height: 100vh;
    }
    
    .results-header {
        padding: 2rem 1rem 1rem;
        text-align: center;
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border-bottom: 1px solid #4B5563;
    }
    
    .results-badge {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        background: rgba(37, 99, 235, 0.15);
        color: #3B82F6;
        padding: 0.75rem 1.25rem;
        border-radius: 20px;
        font-size: 0.9rem;
        font-weight: 600;
        margin-bottom: 1rem;
        border: 1px solid rgba(37, 99, 235, 0.3);
    }
    
    .results-header h1 {
        font-size: 2rem;
        margin: 0.5rem 0;
        color: #F9FAFB;
    }
    
    .results-subtitle {
        color: #9CA3AF;
        margin: 0;
    }
    
    .results-content {
        padding: 1.5rem 1rem;
        gap: 2rem;
    }
    
    /* Performance overview cards */
    .performance-overview {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .score-card {
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border: 1px solid #4B5563;
        border-radius: 20px;
        padding: 2rem 1.5rem;
        text-align: center;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    }
    
    .score-card.primary {
        background: linear-gradient(135deg, #2563EB 0%, #1E40AF 100%);
        border-color: #3B82F6;
        color: white;
    }
    
    .score-card-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1.5rem;
    }
    
    .score-card-header h3 {
        font-size: 1.3rem;
        margin: 0;
        font-weight: 700;
    }
    
    .score-display {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .score-circle {
        width: 120px;
        height: 120px;
        position: relative;
        margin: 0 auto;
    }
    
    .score-circle svg {
        width: 120px;
        height: 120px;
        transform: rotate(-90deg);
    }
    
    .score-text {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        text-align: center;
    }
    
    .score-number {
        display: block;
        font-size: 2rem;
        font-weight: 800;
        line-height: 1;
        margin-bottom: 0.25rem;
    }
    
    .score-label {
        font-size: 0.9rem;
        opacity: 0.8;
    }
    
    .pass-status {
        flex: 1;
    }
    
    .status-indicator {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        font-size: 1.1rem;
        font-weight: 600;
        margin-bottom: 0.5rem;
    }
    
    .status-icon {
        font-size: 1.5rem;
    }
    
    .pass-requirement {
        font-size: 0.9rem;
        opacity: 0.8;
    }
    
    /* Stats grid */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .stat-card {
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border: 1px solid #4B5563;
        border-radius: 16px;
        padding: 1.5rem 1rem;
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    
    .stat-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: currentColor;
    }
    
    .stat-card.correct {
        color: #10B981;
    }
    
    .stat-card.incorrect {
        color: #EF4444;
    }
    
    .stat-card.total {
        color: #3B82F6;
    }
    
    .stat-card.time {
        color: #F59E0B;
    }
    
    .stat-icon {
        margin-bottom: 0.75rem;
        opacity: 0.8;
    }
    
    .stat-content {
        color: #F9FAFB;
    }
    
    .stat-value {
        display: block;
        font-size: 1.8rem;
        font-weight: 800;
        line-height: 1;
        margin-bottom: 0.25rem;
    }
    
    .stat-label {
        font-size: 0.9rem;
        color: #9CA3AF;
        font-weight: 500;
    }
    
    /* Action buttons */
    .results-actions {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 2rem;
    }
    
    .results-actions .btn {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 60px;
        border-radius: 16px;
        border: none;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        transition: all 0.2s ease;
    }
    
    .results-actions .btn-outline {
        background: transparent;
        border: 2px solid #4B5563;
        color: #F9FAFB;
    }
    
    .results-actions .btn-primary {
        background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
        color: white;
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
    }
    
    .results-actions .btn-secondary {
        background: linear-gradient(135deg, #6B7280 0%, #4B5563 100%);
        color: white;
    }
    
    .results-actions .btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }
    
    .results-actions .btn:active {
        transform: translateY(0);
    }
    
    /* Detailed review section */
    .detailed-review {
        background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
        border-radius: 20px;
        padding: 1.5rem;
        margin-top: 2rem;
        border: 1px solid #374151;
    }
    
    .review-header {
        text-align: center;
        margin-bottom: 2rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid #374151;
    }
    
    .review-header h3 {
        font-size: 1.4rem;
        margin-bottom: 0.5rem;
        color: #F9FAFB;
    }
    
    /* MOBILE MODAL NATIVE EXPERIENCE */
    
    /* Stop exam modal */
    .stop-modal {
        z-index: 2000;
    }
    
    .stop-modal-backdrop {
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(8px);
    }
    
    .stop-modal-content {
        width: calc(100vw - 2rem);
        max-width: none;
        margin: 1rem;
        padding: 0;
        border-radius: 24px;
        background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
        border: 1px solid #374151;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        max-height: 90vh;
        overflow: hidden;
    }
    
    .stop-modal-header {
        padding: 2rem 1.5rem 1rem;
        text-align: center;
        background: linear-gradient(135deg, #DC2626 0%, #B91C1C 100%);
        color: white;
    }
    
    .stop-modal-header h3 {
        font-size: 1.4rem;
        margin: 0;
        font-weight: 700;
    }
    
    .stop-modal-body {
        padding: 2rem 1.5rem;
        text-align: center;
    }
    
    .stop-modal-body p {
        font-size: 1.1rem;
        line-height: 1.5;
        color: #F9FAFB;
        margin-bottom: 1rem;
    }
    
    .stop-modal-warning {
        color: #FBBF24 !important;
        font-weight: 600;
        font-size: 1rem !important;
        background: rgba(245, 158, 11, 0.1);
        padding: 1rem;
        border-radius: 12px;
        border: 1px solid rgba(245, 158, 11, 0.3);
    }
    
    .stop-modal-actions {
        padding: 1rem 1.5rem 2rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }
    
    .stop-modal-actions .btn {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 60px;
        border-radius: 16px;
        border: none;
        transition: all 0.2s ease;
    }
    
    #continue-exam-btn {
        background: linear-gradient(135deg, #6B7280 0%, #4B5563 100%);
        color: white;
        order: 2;
    }
    
    #exit-exam-btn {
        background: linear-gradient(135deg, #DC2626 0%, #B91C1C 100%);
        color: white;
        box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
        order: 1;
    }
    
    /* Issue report modal */
    .issue-modal {
        z-index: 2000;
    }
    
    .issue-modal-backdrop {
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(8px);
    }
    
    .issue-modal-content {
        width: calc(100vw - 1rem);
        max-width: none;
        margin: 0.5rem;
        padding: 0;
        border-radius: 24px;
        background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
        border: 1px solid #374151;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        max-height: 95vh;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }
    
    .issue-modal-header {
        padding: 1.5rem;
        background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
        color: white;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-shrink: 0;
    }
    
    .issue-modal-header h3 {
        font-size: 1.3rem;
        margin: 0;
        font-weight: 700;
    }
    
    .close-issue-btn {
        background: none;
        border: none;
        color: white;
        font-size: 1.5rem;
        padding: 0.5rem;
        cursor: pointer;
        border-radius: 8px;
        transition: background-color 0.2s ease;
    }
    
    .close-issue-btn:hover {
        background: rgba(255, 255, 255, 0.2);
    }
    
    .issue-modal-body {
        flex: 1;
        overflow-y: auto;
        padding: 1.5rem;
    }
    
    .issue-form {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .form-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .form-group label {
        font-size: 1rem;
        font-weight: 600;
        color: #F9FAFB;
    }
    
    .issue-select,
    .form-group input,
    .form-group textarea {
        padding: 1rem;
        border-radius: 12px;
        border: 1px solid #4B5563;
        background: #374151;
        color: #F9FAFB;
        font-size: 16px; /* Prevent zoom on focus */
        min-height: 56px;
    }
    
    .form-group textarea {
        min-height: 120px;
        resize: vertical;
    }
    
    .issue-select:focus,
    .form-group input:focus,
    .form-group textarea:focus {
        outline: none;
        border-color: #2563EB;
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    }
    
    .issue-context {
        background: rgba(75, 85, 99, 0.3);
        border-radius: 12px;
        padding: 1rem;
        margin-top: 1rem;
    }
    
    .issue-context h4 {
        font-size: 0.9rem;
        color: #9CA3AF;
        margin: 0 0 0.75rem 0;
        text-transform: uppercase;
        font-weight: 600;
        letter-spacing: 0.5px;
    }
    
    .context-info {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        font-size: 0.85rem;
        color: #D1D5DB;
    }
    
    .issue-actions {
        padding: 1.5rem;
        background: rgba(31, 41, 55, 0.5);
        display: flex;
        flex-direction: column;
        gap: 1rem;
        flex-shrink: 0;
    }
    
    .issue-actions .btn {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 60px;
        border-radius: 16px;
        border: none;
        transition: all 0.2s ease;
    }
    
    #submit-issue-btn {
        background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
        color: white;
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        order: 1;
    }
    
    #cancel-issue-btn {
        background: linear-gradient(135deg, #6B7280 0%, #4B5563 100%);
        color: white;
        order: 2;
    }
    
    /* Feedback modal */
    .feedback-modal {
        z-index: 2000;
    }
    
    .feedback-modal-backdrop {
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(8px);
    }
    
    .feedback-modal-container {
        padding: 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
    }
    
    .feedback-modal-content {
        width: 100%;
        max-width: none;
        border-radius: 24px;
        background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
        border: 1px solid #374151;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        max-height: 90vh;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }
    
    .feedback-header {
        padding: 2rem 1.5rem 1rem;
        background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
        color: white;
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        flex-shrink: 0;
    }
    
    .feedback-title h3 {
        font-size: 1.4rem;
        margin: 0 0 0.5rem 0;
        font-weight: 700;
    }
    
    .feedback-subtitle {
        font-size: 1rem;
        opacity: 0.9;
        margin: 0;
    }
    
    .close-feedback-btn {
        background: none;
        border: none;
        color: white;
        padding: 0.5rem;
        cursor: pointer;
        border-radius: 8px;
        transition: background-color 0.2s ease;
        margin-left: 1rem;
    }
    
    .close-feedback-btn:hover {
        background: rgba(255, 255, 255, 0.2);
    }
    
    .feedback-body {
        flex: 1;
        overflow-y: auto;
        padding: 2rem 1.5rem;
    }
    
    .feedback-form {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .form-row {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .star-rating {
        display: flex;
        gap: 0.5rem;
        justify-content: center;
        margin-top: 0.5rem;
    }
    
    .star-rating input {
        display: none;
    }
    
    .star {
        font-size: 2rem;
        color: #4B5563;
        cursor: pointer;
        transition: color 0.2s ease;
        user-select: none;
    }
    
    .star:hover,
    .star-rating input:checked ~ .star,
    .star-rating input:checked + .star {
        color: #F59E0B;
    }
    
    .form-hint {
        font-size: 0.85rem;
        color: #9CA3AF;
        margin-top: 0.5rem;
    }
    
    .feedback-actions {
        padding: 1.5rem;
        background: rgba(31, 41, 55, 0.5);
        display: flex;
        flex-direction: column;
        gap: 1rem;
        flex-shrink: 0;
    }
    
    .feedback-actions .btn {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1rem;
        font-weight: 600;
        min-height: 60px;
        border-radius: 16px;
        border: none;
        transition: all 0.2s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
    }
    
    #submit-feedback-btn {
        background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
        color: white;
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        order: 1;
    }
    
    /* ABOUT & STUDY GUIDE PAGES MOBILE NATIVE EXPERIENCE */
    
    #about-page .container,
    #study-guide-page .container {
        padding: 0;
        background: #111827;
        min-height: 100vh;
    }
    
    .page-header {
        padding: 1rem;
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border-bottom: 1px solid #4B5563;
        position: sticky;
        top: 0;
        z-index: 100;
        backdrop-filter: blur(20px);
    }
    
    .header-content {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }
    
    .back-btn {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        background: transparent;
        border: 1px solid #4B5563;
        color: #F9FAFB;
        padding: 0.75rem 1rem;
        border-radius: 12px;
        font-size: 0.9rem;
        font-weight: 500;
        text-decoration: none;
        transition: all 0.2s ease;
        align-self: flex-start;
    }
    
    .back-btn:hover {
        background: #374151;
        border-color: #6B7280;
        transform: translateX(-2px);
    }
    
    .page-title {
        text-align: center;
    }
    
    .page-title h1 {
        font-size: 1.6rem;
        margin: 0 0 0.5rem 0;
        color: #F9FAFB;
        font-weight: 700;
    }
    
    .page-subtitle {
        color: #9CA3AF;
        margin: 0;
        font-size: 1rem;
    }
    
    .about-content,
    .study-guide-content {
        padding: 2rem 1rem;
    }
    
    .about-section,
    .guide-section {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }
    
    .content-card {
        background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
        border: 1px solid #4B5563;
        border-radius: 20px;
        overflow: hidden;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    }
    
    .card-header {
        padding: 2rem 1.5rem 1rem;
        background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
        color: white;
        display: flex;
        align-items: center;
        gap: 1rem;
    }
    
    .card-icon {
        background: rgba(255, 255, 255, 0.2);
        padding: 0.75rem;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }
    
    .card-header h2 {
        font-size: 1.3rem;
        margin: 0;
        font-weight: 700;
        flex: 1;
    }
    
    .card-content {
        padding: 2rem 1.5rem;
    }
    
    .card-content p {
        font-size: 1rem;
        line-height: 1.6;
        color: #F9FAFB;
        margin-bottom: 1.5rem;
    }
    
    /* Info grid mobile layout */
    .info-grid {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .info-grid .info-item {
        background: rgba(75, 85, 99, 0.3);
        padding: 1.25rem;
        border-radius: 12px;
        border: 1px solid #6B7280;
    }
    
    .info-grid .info-item h4 {
        font-size: 0.9rem;
        font-weight: 600;
        color: #9CA3AF;
        margin: 0 0 0.5rem 0;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    
    .info-grid .info-item p {
        font-size: 1.2rem;
        font-weight: 700;
        color: #F9FAFB;
        margin: 0;
    }
    
    /* Topics grid mobile layout */
    .topics-grid {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .topic-item {
        padding: 1.5rem;
        background: rgba(75, 85, 99, 0.3);
        border-radius: 12px;
        border-left: 4px solid #2563EB;
        border: 1px solid #6B7280;
    }
    
    .topic-item h4 {
        font-size: 1.1rem;
        font-weight: 600;
        color: #F9FAFB;
        margin: 0 0 0.75rem 0;
    }
    
    .topic-item p {
        font-size: 0.9rem;
        color: #9CA3AF;
        margin: 0;
        line-height: 1.5;
    }
    
    /* Features list mobile layout */
    .features-list {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .feature-item {
        display: flex;
        align-items: center;
        gap: 1rem;
        padding: 1.25rem;
        background: rgba(75, 85, 99, 0.3);
        border-radius: 12px;
        border: 1px solid #6B7280;
    }
    
    .feature-item svg {
        color: #2563EB;
        flex-shrink: 0;
        background: rgba(37, 99, 235, 0.15);
        padding: 0.5rem;
        border-radius: 8px;
    }
    
    .feature-item span {
        font-size: 0.95rem;
        color: #F9FAFB;
        font-weight: 500;
        line-height: 1.4;
    }
    
    /* Study timeline mobile layout */
    .study-timeline {
        display: flex;
        flex-direction: column;
        gap: 2rem;
        margin-top: 1.5rem;
    }
    
    .timeline-item {
        display: flex;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .timeline-marker {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 56px;
        height: 56px;
        background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
        color: white;
        border-radius: 50%;
        font-weight: 700;
        font-size: 1.2rem;
        flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }
    
    .timeline-content {
        flex: 1;
        padding-top: 0.25rem;
    }
    
    .timeline-content h4 {
        font-size: 1.2rem;
        font-weight: 700;
        color: #F9FAFB;
        margin: 0 0 0.75rem 0;
    }
    
    .timeline-content p {
        font-size: 1rem;
        color: #9CA3AF;
        margin: 0 0 1rem 0;
        line-height: 1.5;
    }
    
    .timeline-content ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .timeline-content li {
        font-size: 0.9rem;
        color: #F9FAFB;
        padding: 0.5rem 0;
        position: relative;
        padding-left: 1.5rem;
        background: rgba(75, 85, 99, 0.2);
        border-radius: 8px;
        padding: 0.75rem 0.75rem 0.75rem 2rem;
    }
    
    .timeline-content li::before {
        content: "•";
        color: #2563EB;
        font-weight: bold;
        position: absolute;
        left: 0.75rem;
        top: 0.75rem;
    }
    
    /* Resources grid mobile layout */
    .resources-grid {
        display: flex;
        flex-direction: column;
        gap: 2rem;
        margin-top: 1.5rem;
    }
    
    .resource-category {
        background: rgba(75, 85, 99, 0.3);
        padding: 1.5rem;
        border-radius: 12px;
        border: 1px solid #6B7280;
    }
    
    .resource-category h4 {
        font-size: 1.1rem;
        font-weight: 700;
        color: #F9FAFB;
        margin: 0 0 1rem 0;
        padding-bottom: 0.75rem;
        border-bottom: 2px solid #2563EB;
    }
    
    .resource-category ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .resource-category li {
        font-size: 0.9rem;
        color: #F9FAFB;
        padding: 0.75rem;
        background: rgba(75, 85, 99, 0.2);
        border-radius: 8px;
        border: none;
        border-left: 3px solid #2563EB;
    }
    
    /* Tips grid mobile layout */
    .tips-grid {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        margin-top: 1.5rem;
    }
    
    .tip-item {
        padding: 2rem 1.5rem;
        background: rgba(75, 85, 99, 0.3);
        border-radius: 16px;
        border: 1px solid #6B7280;
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    
    .tip-item::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, #2563EB, #F59E0B);
    }
    
    .tip-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        display: block;
    }
    
    .tip-item h4 {
        font-size: 1.2rem;
        font-weight: 700;
        color: #F9FAFB;
        margin: 0 0 1rem 0;
    }
    
    .tip-item p {
        font-size: 0.95rem;
        color: #9CA3AF;
        margin: 0;
        line-height: 1.6;
    }
    
    /* Practice steps mobile layout */
    .practice-steps {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        margin-top: 1.5rem;
    }
    
    .step-item {
        display: flex;
        gap: 1rem;
        align-items: flex-start;
        padding: 1.5rem;
        background: rgba(75, 85, 99, 0.3);
        border-radius: 16px;
        border-left: 4px solid #F59E0B;
        border: 1px solid #6B7280;
    }
    
    .step-number {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 48px;
        height: 48px;
        background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
        color: white;
        border-radius: 50%;
        font-weight: 700;
        font-size: 1.2rem;
        flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
    }
    
    .step-content h4 {
        font-size: 1.1rem;
        font-weight: 700;
        color: #F9FAFB;
        margin: 0 0 0.75rem 0;
    }
    
    /* ENHANCED FOOTER MOBILE EXPERIENCE */
    
    .app-footer {
        margin-top: 3rem;
        background: linear-gradient(135deg, #111827 0%, #1F2937 100%);
        border-top: 1px solid #374151;
    }
    
    .footer-content {
        padding: 2rem 1rem 1.5rem;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
        margin-bottom: 2rem;
    }
    
    .footer-brand {
        max-width: none;
    }
    
    .footer-logo {
        justify-content: center;
        margin-bottom: 1rem;
    }
    
    .footer-brand-name {
        font-size: 1.1rem;
        font-weight: 700;
    }
    
    .footer-tagline {
        font-size: 0.95rem;
        text-align: center;
        margin-top: 0.5rem;
    }
    
    .footer-nav {
        justify-content: center;
        gap: 3rem;
        flex-wrap: wrap;
    }
    
    .footer-nav-section {
        min-width: 150px;
    }
    
    .footer-nav-section h4 {
        text-align: center;
        margin-bottom: 1rem;
        font-size: 0.95rem;
    }
    
    .footer-nav-section ul {
        align-items: center;
        gap: 1rem;
    }
    
    .footer-link {
        font-size: 0.9rem;
        padding: 0.5rem 0.75rem;
        border-radius: 8px;
        transition: all 0.2s ease;
    }
    
    .footer-link:hover {
        background: rgba(37, 99, 235, 0.1);
        color: #3B82F6;
    }
    
    .footer-social {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        min-width: 90px;
        padding: 0.75rem;
        background: rgba(75, 85, 99, 0.3);
        border-radius: 12px;
        border: 1px solid #4B5563;
        transition: all 0.2s ease;
    }
    
    .footer-social:hover {
        background: rgba(37, 99, 235, 0.2);
        border-color: #2563EB;
        transform: translateY(-1px);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid #374151;
    }
    
    .footer-copyright {
        order: 1;
    }
    
    .footer-copyright p {
        font-size: 0.85rem;
        line-height: 1.6;
    }
    
    .footer-disclaimer {
        font-size: 0.8rem !important;
        margin-top: 0.5rem;
    }
    
    .footer-meta {
        justify-content: center;
        order: 2;
        gap: 1rem;
        flex-wrap: wrap;
    }
    
    .footer-version {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
        border-radius: 16px;
    }
    
    .footer-updated {
        font-size: 0.8rem;
    }
    
    /* GENERAL MOBILE ENHANCEMENTS */
    
    /* Prevent horizontal scroll */
    html,
    body {
        overflow-x: hidden;
    }
    
    /* Improve tap targets */
    button,
    .btn,
    .mock-btn,
    .answer-option,
    .footer-link,
    .back-btn {
        min-height: 44px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(37, 99, 235, 0.2);
    }
    
    /* Improve form inputs */
    input,
    select,
    textarea {
        font-size: 16px; /* Prevent iOS zoom */
        border-radius: 12px;
        min-height: 56px;
    }
    
    input:focus,
    select:focus,
    textarea:focus {
        outline: none;
        border-color: #2563EB;
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    }
    
    /* Better loading screen */
    .loading-screen {
        background: rgba(17, 24, 39, 0.95);
        backdrop-filter: blur(20px);
    }
    
    .loading-content {
        text-align: center;
        color: #F9FAFB;
    }
    
    .loading-content p {
        font-size: 1.1rem;
        margin-top: 1rem;
        color: #9CA3AF;
    }
    
    .loading-spinner {
        width: 60px;
        height: 60px;
        border: 4px solid #374151;
        border-top: 4px solid #2563EB;
        border-radius: 50%;
        animation: spin 1s linear infinite;
        margin: 0 auto;
    }
    
    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
    
    /* Safe area insets for iOS */
    .page {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    /* Sticky header safe area */
    .exam-header.sticky {
        top: env(safe-area-inset-top);
    }
    
}

/* ENHANCED VERY SMALL MOBILE DEVICES (≤480px) */
@media (max-width: 480px) {
    /* Ultra-compact layouts */
    .hero-section {
        padding: 1rem 0.75rem;
    }
    
    .hero-section h2 {
        font-size: 1.3rem;
        margin-bottom: 1rem;
    }
    
    .mock-options {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .mock-btn {
        padding: 0.875rem 0.5rem;
        font-size: 0.9rem;
        min-height: 52px;
    }
    
    #start-exam-btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
        min-height: 56px;
        margin-top: 1.5rem;
    }
    
    /* Question page compact */
    .exam-header {
        padding: 0.75rem;
    }
    
    .question-container {
        padding: 1rem 0.75rem;
        min-height: calc(100vh - 180px);
    }
    
    .question-text {
        padding: 1rem;
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .answer-options {
        gap: 0.75rem;
    }
    
    .answer-option {
        padding: 1rem 0.75rem;
        min-height: 60px;
    }
    
    .answer-option label {
        font-size: 0.95rem;
    }
    
    .question-navigation {
        padding: 1rem 0.75rem;
    }
    
    .nav-buttons .btn {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
        min-height: 52px;
    }
    
    #stop-exam-btn,
    #submit-exam-btn {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
        min-height: 52px;
    }
    
    /* Results page compact */
    .results-content {
        padding: 1rem 0.75rem;
    }
    
    .score-circle {
        width: 100px;
        height: 100px;
    }
    
    .score-circle svg {
        width: 100px;
        height: 100px;
    }
    
    .score-number {
        font-size: 1.6rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .stat-card {
        padding: 1.25rem 1rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .results-actions .btn {
        padding: 1rem 1.5rem;
        font-size: 0.9rem;
        min-height: 52px;
    }
    
    /* Modal compact */
    .stop-modal-content,
    .issue-modal-content,
    .feedback-modal-content {
        width: calc(100vw - 1rem);
        margin: 0.5rem;
        border-radius: 20px;
    }
    
    .stop-modal-header,
    .issue-modal-header,
    .feedback-header {
        padding: 1.5rem 1rem 1rem;
    }
    
    .stop-modal-body,
    .issue-modal-body,
    .feedback-body {
        padding: 1.5rem 1rem;
    }
    
    .stop-modal-actions,
    .issue-actions,
    .feedback-actions {
        padding: 1rem;
    }
    
    .modal .btn {
        padding: 1rem 1.5rem;
        font-size: 0.9rem;
        min-height: 52px;
    }
    
    /* About/Study pages compact */
    .page-header {
        padding: 0.75rem;
    }
    
    .page-title h1 {
        font-size: 1.4rem;
    }
    
    .about-content,
    .study-guide-content {
        padding: 1.5rem 0.75rem;
    }
    
    .content-card {
        border-radius: 16px;
    }
    
    .card-header {
        padding: 1.5rem 1rem 0.75rem;
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
    
    .card-header h2 {
        font-size: 1.2rem;
    }
    
    .card-content {
        padding: 1.5rem 1rem;
    }
    
    .timeline-marker {
        width: 48px;
        height: 48px;
        font-size: 1.1rem;
    }
    
    .tip-item {
        padding: 1.5rem 1rem;
    }
    
    .tip-icon {
        font-size: 2rem;
    }
    
    /* Footer compact */
    .footer-content {
        padding: 1.5rem 0.75rem 1rem;
    }
    
    .footer-nav {
        gap: 2rem;
    }
    
    .footer-nav-section {
        min-width: 130px;
    }
    
    .footer-social {
        min-width: 80px;
        padding: 0.625rem;
    }
    
    .footer-link {
        font-size: 0.85rem;
        padding: 0.375rem 0.5rem;
    }
}

/* LANDSCAPE MOBILE OPTIMIZATIONS */
@media (max-width: 768px) and (orientation: landscape) and (max-height: 500px) {
    /* Optimize for landscape phones */
    .exam-header {
        padding: 0.5rem 1rem;
        flex-direction: row;
    }
    
    .exam-progress {
        flex: 1;
        margin-right: 1rem;
    }
    
    .timer {
        text-align: right;
        flex-shrink: 0;
        background: none;
        padding: 0;
        border: none;
    }
    
    .timer-value {
        font-size: 1.2rem;
    }
    
    .question-container {
        min-height: calc(100vh - 140px);
        padding: 1rem;
    }
    
    .question-text {
        padding: 1rem;
        font-size: 0.95rem;
        margin-bottom: 1rem;
    }
    
    .answer-options {
        gap: 0.5rem;
    }
    
    .answer-option {
        padding: 0.75rem 1rem;
        min-height: 48px;
    }
    
    .question-navigation {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 0.75rem 1rem;
        flex-direction: row;
        gap: 0.75rem;
        z-index: 1001;
    }
    
    .nav-buttons {
        flex: 1;
        order: 2;
    }
    
    .nav-buttons .btn {
        padding: 0.75rem 1rem;
        min-height: 44px;
        font-size: 0.9rem;
    }
    
    #stop-exam-btn {
        order: 1;
        width: auto;
        flex-shrink: 0;
        margin: 0;
        padding: 0.75rem 1rem;
        min-height: 44px;
        font-size: 0.9rem;
    }
    
    #submit-exam-btn {
        order: 3;
        width: auto;
        flex-shrink: 0;
        margin: 0;
        padding: 0.75rem 1rem;
        min-height: 44px;
        font-size: 0.9rem;
    }
    
    /* Adjust content padding for fixed navigation */
    .question-content {
        padding-bottom: 80px;
    }
}

@media (max-width: 480px) {
    .hero-section,
    .question-container,
    .score-summary {
        padding: 1rem;
    }
    
    .results-content {
        gap: 1rem;
        padding: 0.5rem 0 0.25rem;
    }
    
    /* Ultra-compact mobile layout */
    .question-text {
        margin-bottom: 0.4rem;
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .answer-option {
        padding: 0.5rem 0.7rem;
        margin-bottom: 0.3rem;
    }
    
    .answer-option label {
        font-size: 0.85rem;
        line-height: 1.3;
    }
    
    /* Ensure 1.5rem spacing on small mobile */
    .answer-options {
        margin-bottom: 1.5rem;
    }
    
    .question-navigation {
        padding: 0;
        margin-top: 0;
    }
    
    .score-circle {
        width: 60px;
        height: 60px;
    }
    
    .score-circle svg {
        width: 60px;
        height: 60px;
    }
    
    .score-circle svg circle {
        r: 25;
        cx: 30;
        cy: 30;
    }
    
    .score-number {
        font-size: 1rem;
    }
    
    .score-number {
        font-size: 2rem;
    }
    
    .mock-options {
        justify-content: center;
    }
    
    .mock-btn {
        min-width: 50px;
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
    
    .page {
        padding: 0.25rem 0;
        min-height: 100vh;
    }
    
    .header {
        padding: 1rem 0;
    }
    
    .main-content {
        min-height: calc(100vh - 80px);
    }
}

/* Extra small devices (phones, less than 480px) */
@media (max-width: 479px) {
    .container {
        padding: 0 6px;
    }
    
    .hero-section {
        padding: 1rem;
        border-radius: 12px;
    }
    
    .question-container {
        padding: 0.6rem;
        border-radius: 8px;
        max-height: calc(75vh - 60px);
        min-height: calc(75vh - 60px);
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .hero-section h2 {
        font-size: 1.1rem;
        margin-bottom: 0.6rem;
    }
    
    .question-text {
        font-size: 0.85rem;
        padding: 0.6rem;
        line-height: 1.3;
    }
    
    .answer-option {
        padding: 0.4rem 0.6rem;
        margin-bottom: 0.4rem;
        border-radius: 6px;
    }
    
    .answer-option label {
        font-size: 0.8rem;
        line-height: 1.2;
    }
    
    .exam-header {
        padding: 0.5rem;
    }
    
    .timer-value {
        font-size: 1rem;
    }
    
    .timer-label {
        font-size: 0.7rem;
    }
    
    #question-counter {
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }
    
    .mock-btn {
        min-width: 45px;
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }
    
    .answer-options {
        max-height: calc(75vh - 187px);
        margin-bottom: 1.5rem;
    }
    
    .question-navigation {
        gap: 0.3rem;
        padding-top: 0;
        margin-top: 0;
    }
    
    .nav-buttons {
        gap: 0.3rem;
    }
}

/* Landscape mode for mobile devices */
@media (max-width: 768px) and (orientation: landscape) {
    .main-content {
        min-height: calc(100vh - 40px);
        padding: 0.3rem 0;
    }
    
    .hero-section {
        padding: 1rem;
    }
    
    .question-container {
        max-height: calc(75vh - 45px);
        min-height: calc(75vh - 45px);
        padding: 0.8rem;
    }
    
    .exam-header {
        padding: 0.4rem;
    }
    
    .question-text {
        padding: 0.6rem;
        font-size: 0.9rem;
    }
    
    .answer-option {
        padding: 0.4rem 0.8rem;
        margin-bottom: 0.4rem;
    }
    
    .answer-options {
        max-height: calc(75vh - 150px);
    }
    
    .question-container {
        max-height: calc(75vh - 75px);
        padding: 1rem;
    }
    
    .exam-header {
        padding: 0.6rem 0.8rem;
    }
}

/* Tablet devices (769px to 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 600px;
        padding: 0 10px;
    }
    
    .hero-section {
        max-width: 550px;
        padding: 1.8rem;
    }
    
    .question-container {
        max-width: 550px;
        padding: 1rem;
    }
    
    .logo h1 {
        font-size: 1.6rem;
    }
    
    .hero-section h2 {
        font-size: 1.4rem;
    }
    
    .question-text {
        font-size: 0.95rem;
        padding: 0.9rem;
    }
    
    .answer-option {
        padding: 0.6rem 0.9rem;
    }
    
    .answer-option label {
        font-size: 0.85rem;
    }
}

/* High density displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo h1,
    .hero-section h2,
    .question-text {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .btn-primary {
        border: 2px solid #000;
    }
    
    .answer-option {
        border-width: 3px;
    }
    
    .answer-option.selected {
        border-width: 3px;
        border-color: #000;
    }
}

/* Feedback Modal Styles */
.feedback-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.feedback-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
}

.feedback-modal-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.feedback-modal-content {
    background: linear-gradient(145deg, #1F2937 0%, #111827 100%);
    border-radius: 20px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.8),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    animation: slideUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: hidden;
}

@keyframes slideUp {
    from { 
        transform: translateY(40px) scale(0.95); 
        opacity: 0; 
    }
    to { 
        transform: translateY(0) scale(1); 
        opacity: 1; 
    }
}

.feedback-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 2rem 2rem 1rem;
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 50%, #4a5568 100%);
    color: white;
    position: relative;
}

.feedback-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.feedback-title h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: #e2e8f0;
}

.feedback-subtitle {
    margin: 0;
    font-size: 0.9rem;
    color: #a0aec0;
    font-weight: 400;
}

.close-feedback-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #e2e8f0;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-feedback-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.feedback-body {
    padding: 2rem;
    overflow-y: auto;
    max-height: calc(90vh - 200px);
}

/* Feedback Form Styles */
.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: #e2e8f0;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    padding: 0.875rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.05);
    color: #F9FAFB;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.form-input:focus {
    outline: none;
    border-color: #2563EB;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

.form-input::placeholder {
    color: #a0aec0;
}

/* Select dropdown specific styling */
.form-input select,
.form-input option {
    background: #2d3748;
    color: #e2e8f0;
}

.form-input option {
    padding: 0.5rem;
    background: #2d3748;
    color: #e2e8f0;
    border: none;
}

.form-input option:hover,
.form-input option:focus,
.form-input option:checked {
    background: #4a5568;
    color: #ffffff;
}

.form-hint {
    font-size: 0.8rem;
    color: #a0aec0;
    margin-top: 0.25rem;
}

/* Star Rating Styles */
.star-rating {
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    gap: 0.25rem;
}

.star-rating input[type="radio"] {
    display: none;
}

.star-rating .star {
    font-size: 1.75rem;
    color: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
}

.star-rating .star:hover,
.star-rating .star.active {
    color: #fbbf24;
    text-shadow: 0 0 10px rgba(251, 191, 36, 0.5);
    transform: scale(1.1);
}

.feedback-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.feedback-actions .btn {
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feedback-actions .btn-primary {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    border: none;
    color: white;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.feedback-actions .btn-primary:hover {
    background: linear-gradient(135deg, #D97706, #B45309);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 153, 225, 0.4);
}

.feedback-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
}

.feedback-actions .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-feedback {
    background: linear-gradient(135deg, #48bb78, #38a169);
    color: white;
    box-shadow: 0 4px 15px rgba(72, 187, 120, 0.3);
}

.btn-feedback:hover {
    background: linear-gradient(135deg, #38a169, #2f855a);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(72, 187, 120, 0.4);
}

/* Feedback Success Styles */
.feedback-success {
    text-align: center;
    padding: 2rem 0;
    animation: fadeInSuccess 0.5s ease-in-out;
}

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

.success-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #48bb78;
    animation: bounceIn 0.6s ease-in-out;
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.95);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.feedback-success h3 {
    color: #e2e8f0;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.feedback-success p {
    color: #a0aec0;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.success-social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.success-social-links .social-link {
    background: rgba(102, 126, 234, 0.2);
    color: #667eea;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.success-social-links .social-link:hover {
    background: rgba(102, 126, 234, 0.3);
    transform: translateY(-2px);
    border-color: rgba(102, 126, 234, 0.5);
}

.dismiss-hint {
    margin-top: 1.5rem;
    opacity: 0.7;
    font-style: italic;
}

.dismiss-hint small {
    color: #a0aec0;
    font-size: 0.8rem;
}

/* Minimal Professional Footer Styles */
.app-footer {
    background: linear-gradient(135deg, 
        rgba(17, 24, 39, 0.98) 0%, 
        rgba(31, 41, 55, 0.98) 100%);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(37, 99, 235, 0.15);
    color: #F9FAFB;
    margin-top: 2rem;
    position: relative;
}

.app-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(37, 99, 235, 0.4), 
        transparent);
}

.footer-content {
    padding: 1.5rem 0 1rem;
}

/* Main Footer Layout */
.footer-main {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2rem;
    align-items: start;
    margin-bottom: 1.5rem;
}

/* Brand Section */
.footer-brand {
    max-width: 280px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.footer-logo svg {
    color: #2563EB;
    flex-shrink: 0;
}

.footer-brand-name {
    font-size: 1rem;
    font-weight: 600;
    color: #f7fafc;
    line-height: 1.2;
}

.footer-tagline {
    font-size: 0.85rem;
    color: #9CA3AF;
    margin: 0;
    line-height: 1.4;
}

/* Navigation */
.footer-nav {
    display: flex;
    gap: 2rem;
}

.footer-nav-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: #f7fafc;
    margin: 0 0 0.75rem 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-nav-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-link {
    color: #9CA3AF;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.125rem 0;
}

.footer-link:hover,
.footer-link:focus {
    color: #F59E0B;
    outline: none;
}

.footer-link:focus-visible {
    outline: 2px solid #2563EB;
    outline-offset: 2px;
    border-radius: 3px;
}

/* Social Links */
.footer-social svg {
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.footer-social:hover svg,
.footer-social:focus svg {
    opacity: 1;
}

/* Footer Button */
.footer-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    padding: 0.125rem 0;
    text-align: left;
}

.footer-btn:hover,
.footer-btn:focus {
    color: #e2e8f0;
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    gap: 1rem;
}

.footer-copyright {
    flex: 1;
}

.footer-copyright p {
    font-size: 0.8rem;
    color: #a0aec0;
    margin: 0;
    line-height: 1.4;
}

.footer-copyright p:first-child {
    margin-bottom: 0.25rem;
}

.footer-disclaimer {
    font-size: 0.75rem !important;
    color: #718096 !important;
    opacity: 0.8;
}

.footer-creator {
    color: #4299e1;
    font-weight: 600;
}

/* Meta Info */
.footer-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: #718096;
    flex-shrink: 0;
}

.footer-version {
    background: rgba(66, 153, 225, 0.15);
    color: #4299e1;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 600;
    letter-spacing: 0.25px;
}

.footer-updated {
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .footer-content {
        padding: 1.25rem 0 0.75rem;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 1.75rem;
        text-align: center;
    }
    
    .footer-brand {
        max-width: none;
    }
    
    .footer-logo {
        justify-content: center;
        margin-bottom: 0.75rem;
    }
    
    .footer-tagline {
        text-align: center;
    }
    
    .footer-nav {
        justify-content: center;
        gap: 2rem;
        flex-wrap: wrap;
    }
    
    .footer-nav-section {
        min-width: 140px;
    }
    
    .footer-nav-section h4 {
        text-align: center;
        margin-bottom: 1rem;
    }
    
    .footer-nav-section ul {
        align-items: center;
        gap: 0.75rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        padding-top: 1rem;
    }
    
    .footer-copyright {
        order: 1;
    }
    
    .footer-meta {
        justify-content: center;
        order: 2;
    }
}

@media (max-width: 480px) {
    .footer-content {
        padding: 1rem 0 0.75rem;
    }
    
    .footer-main {
        gap: 1.5rem;
    }
    
    .footer-logo {
        margin-bottom: 0.5rem;
    }
    
    .footer-logo svg {
        width: 20px;
        height: 20px;
    }
    
    .footer-brand-name {
        font-size: 0.9rem;
    }
    
    .footer-tagline {
        font-size: 0.8rem;
    }
    
    .footer-nav {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
        width: 100%;
    }
    
    .footer-nav-section {
        width: 100%;
        min-width: auto;
    }
    
    .footer-nav-section h4 {
        font-size: 0.8rem;
        margin-bottom: 0.75rem;
        text-align: center;
    }
    
    .footer-nav-section ul {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .footer-link {
        font-size: 0.8rem;
        padding: 0.375rem 0.5rem;
        border-radius: 6px;
    }
    
    .footer-social {
        min-width: 70px;
        justify-content: center;
    }
    
    .footer-copyright p {
        font-size: 0.75rem;
        line-height: 1.5;
    }
    
    .footer-copyright p:first-child {
        margin-bottom: 0.5rem;
    }
    
    .footer-disclaimer {
        font-size: 0.7rem !important;
        line-height: 1.4 !important;
    }
    
    .footer-meta {
        flex-direction: row;
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer-version {
        font-size: 0.7rem;
        padding: 0.2rem 0.4rem;
    }
    
    .footer-updated {
        font-size: 0.7rem;
    }
}

@media (max-width: 360px) {
    .footer-content {
        padding: 0.75rem 0 0.5rem;
    }
    
    .footer-main {
        gap: 1.25rem;
    }
    
    .footer-nav {
        gap: 1.25rem;
    }
    
    .footer-nav-section ul {
        gap: 0.375rem;
    }
    
    .footer-link {
        font-size: 0.75rem;
        padding: 0.3rem 0.4rem;
    }
    
    .footer-social svg {
        width: 14px;
        height: 14px;
    }
    
    .footer-copyright p {
        font-size: 0.7rem;
    }
    
    .footer-disclaimer {
        font-size: 0.65rem !important;
    }
    
    .footer-meta {
        gap: 0.75rem;
    }
    
    .footer-version,
    .footer-updated {
        font-size: 0.65rem;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .app-footer {
        border-top-color: #4299e1;
    }
    
    .footer-link:hover,
    .footer-link:focus {
        color: #ffffff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .footer-link {
        transition: none;
    }
    
    .footer-social svg {
        transition: none;
    }
}

/* Extra small devices (phones in portrait) */
@media (max-width: 480px) {
    .app-footer {
        padding: 1rem 0 0.75rem;
        margin-top: 1rem;
        text-align: center;
    }
    
    .footer-content {
        gap: 0.75rem;
        margin-bottom: 0.75rem;
        text-align: center;
        align-items: center;
    }
    
    .footer-section {
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
    
    .footer-section h4 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
        text-align: center;
    }
    
    .footer-section p {
        font-size: 0.85rem;
        margin-bottom: 0.5rem;
        text-align: center;
        max-width: 280px;
    }
    
    .social-links, .support-links {
        flex-direction: column;
        align-items: center;
        gap: 0.4rem;
        width: 100%;
    }
    
    .social-link {
        padding: 0.5rem 0.7rem;
        font-size: 0.8rem;
        width: 100%;
        max-width: 200px;
        min-width: auto;
        justify-content: center;
    }
    
    .footer-links {
        align-items: center;
        text-align: center;
    }
    
    .footer-link-btn {
        text-align: center;
    }
    
    .footer-bottom {
        padding-top: 0.75rem;
        font-size: 0.75rem;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .feedback-modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .feedback-header {
        padding: 1rem 1.5rem;
    }
    
    .feedback-body {
        padding: 1.5rem;
    }
    
    .feedback-actions {
        flex-direction: column;
    }
}

/* Stop Exam Modal Styles */
.stop-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.stop-modal.show {
    opacity: 1;
    visibility: visible;
}

.stop-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.stop-modal-content {
    background: #1F2937;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    border: 1px solid #374151;
    max-width: 450px;
    width: 90%;
    position: relative;
    z-index: 1001;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.3s ease;
}

.stop-modal.show .stop-modal-content {
    transform: scale(1) translateY(0);
}

.stop-modal-header {
    padding: 2rem 2rem 0 2rem;
    text-align: center;
}

.stop-modal-header h3 {
    color: #F9FAFB;
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0;
}

.stop-modal-body {
    padding: 1.5rem 2rem;
    text-align: center;
}

.stop-modal-body p {
    color: #9CA3AF;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 1rem 0;
}

.stop-modal-warning {
    color: #fbb6ce !important;
    font-size: 0.9rem !important;
    font-style: italic;
}

.stop-modal-actions {
    padding: 0 2rem 2rem 2rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.stop-modal-actions .btn {
    flex: 1;
    max-width: 150px;
}

.btn-danger {
    background: linear-gradient(135deg, #e53e3e, #c53030);
    color: white;
    border: none;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #c53030, #9c2727);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .stop-modal-content {
        max-width: 350px;
    }
    
    .stop-modal-header {
        padding: 1.5rem 1.5rem 0 1.5rem;
    }
    
    .stop-modal-body {
        padding: 1rem 1.5rem;
    }
    
    .stop-modal-actions {
        padding: 0 1.5rem 1.5rem 1.5rem;
        flex-direction: column;
    }
    
    .stop-modal-actions .btn {
        max-width: none;
    }
}

/* Issue Report Modal Styles */
.issue-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.issue-modal.show {
    opacity: 1;
    visibility: visible;
}

.issue-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.issue-modal-content {
    background: #1F2937;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    border: 1px solid #374151;
    max-width: 600px;
    width: 95%;
    max-height: 90vh;
    position: relative;
    z-index: 1001;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.3s ease;
    overflow: hidden;
}

.issue-modal.show .issue-modal-content {
    transform: scale(1) translateY(0);
}

.issue-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #374151;
    background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
    color: white;
}

.issue-modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 600;
}

.close-issue-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.close-issue-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.issue-modal-body {
    padding: 2rem;
    max-height: calc(90vh - 140px);
    overflow-y: auto;
}

.issue-modal-body p {
    color: #9CA3AF;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.issue-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: #F9FAFB;
    font-weight: 500;
    font-size: 0.9rem;
}

.issue-select,
.form-group input,
.form-group textarea {
    background: #111827;
    border: 1px solid #374151;
    border-radius: 8px;
    padding: 0.75rem;
    color: #F9FAFB;
    font-size: 0.9rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    resize: vertical;
}

.issue-select:focus,
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563EB;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.issue-select option {
    background: #111827;
    color: #F9FAFB;
}

.issue-context {
    background: #1a202c;
    border: 1px solid #4a5568;
    border-radius: 8px;
    padding: 1rem;
}

.issue-context h4 {
    color: #e2e8f0;
    margin: 0 0 0.75rem 0;
    font-size: 0.95rem;
    font-weight: 600;
}

.context-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.context-info span {
    color: #cbd5e0;
}

.context-info strong {
    color: #e2e8f0;
}

.issue-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #4a5568;
}

.issue-actions .btn {
    min-width: 120px;
}

@media (max-width: 768px) {
    .issue-modal-content {
        max-width: 95%;
        margin: 1rem;
    }
    
    .issue-modal-header {
        padding: 1rem 1.5rem;
    }
    
    .issue-modal-body {
        padding: 1.5rem;
    }
    
    .issue-actions {
        flex-direction: column;
    }
    
    .issue-actions .btn {
        min-width: auto;
    }
    
    .context-info {
        font-size: 0.8rem;
    }
}

/* Extra Small Mobile Devices (max-width: 375px) - iPhone SE and smaller */
@media (max-width: 375px) {
    .question-container {
        padding: 0.75rem;
        max-height: calc(75vh - 105px);
    }
    
    .question-text {
        margin-bottom: 0.3rem;
        padding: 0.4rem;
        font-size: 0.85rem;
    }
    
    .answer-options {
        margin-bottom: 1.5rem;
        max-height: calc(75vh - 165px);
    }
    
    .answer-option {
        padding: 0.4rem 0.6rem;
        margin-bottom: 0.25rem;
    }
    
    .answer-option label {
        font-size: 0.8rem;
        line-height: 1.2;
    }
    
    .question-navigation {
        gap: 0.2rem;
        padding-top: 0;
        margin-top: 0;
    }
    
    .nav-buttons {
        gap: 0.2rem;
    }
    
    .nav-buttons .btn {
        font-size: 0.75rem;
        padding: 0.5rem 0.8rem;
    }
}

/* Enhanced Review and Security Styles */

/* Tab Switch Warning Styles */
.tab-switch-warning {
    animation: slideDown 0.5s ease-out;
    border-bottom: 3px solid #f56565;
}

.tab-switch-submission {
    animation: zoomIn 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes zoomIn {
    from {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

/* Enhanced Review Styles */
.review-summary {
    background: linear-gradient(135deg, #2d3748, #4a5568);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid #4a5568;
}

.review-navigation h3 {
    color: #e2e8f0;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.review-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.stat {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.correct-stat {
    background: rgba(72, 187, 120, 0.2);
    color: #68d391;
    border: 1px solid #68d391;
}

.incorrect-stat {
    background: rgba(245, 101, 101, 0.2);
    color: #f56565;
    border: 1px solid #f56565;
}

.unanswered-stat {
    background: rgba(237, 137, 54, 0.2);
    color: #ed8936;
    border: 1px solid #ed8936;
}

.review-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background: #4a5568;
    color: #e2e8f0;
    border: 1px solid #718096;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn:hover {
    background: #718096;
    transform: translateY(-1px);
}

.filter-btn.active {
    background: linear-gradient(135deg, #4299e1, #3182ce);
    border-color: #4299e1;
    color: white;
}

/* Enhanced Answer Review Items */
.answer-review-item[data-question-index] {
    background: linear-gradient(135deg, #2d3748, #4a5568);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid #4a5568;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.review-question-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.question-number {
    background: linear-gradient(135deg, #4299e1, #3182ce);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.question-type-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.question-type-badge.multiple {
    background: rgba(237, 137, 54, 0.2);
    color: #ed8936;
    border: 1px solid #ed8936;
}

.question-type-badge.single {
    background: rgba(72, 187, 120, 0.2);
    color: #68d391;
    border: 1px solid #68d391;
}

.difficulty-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.difficulty-badge.basic {
    background: rgba(72, 187, 120, 0.2);
    color: #68d391;
}

.difficulty-badge.intermediate {
    background: rgba(237, 137, 54, 0.2);
    color: #ed8936;
}

.difficulty-badge.advanced {
    background: rgba(245, 101, 101, 0.2);
    color: #f56565;
}

.review-question {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    line-height: 1.6;
    color: #e2e8f0;
}

.review-answers {
    margin-bottom: 1rem;
}

.review-answer {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.review-answer.correct-selected {
    background: rgba(72, 187, 120, 0.2);
    border-color: #68d391;
    color: #68d391;
}

.review-answer.correct-not-selected,
.review-answer.correct-not-answered {
    background: rgba(72, 187, 120, 0.1);
    border-color: #68d391;
    color: #a7f3d0;
    border-style: dashed;
}

.review-answer.incorrect-selected {
    background: rgba(245, 101, 101, 0.2);
    border-color: #f56565;
    color: #f56565;
}

.review-answer.not-selected {
    background: rgba(160, 174, 192, 0.1);
    color: #a0aec0;
}

.answer-content {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.answer-explanation {
    color: #a0aec0;
    font-style: italic;
    font-size: 0.85rem;
}

.review-status {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    margin-bottom: 1rem;
    display: inline-block;
}

.review-status.correct {
    background: rgba(72, 187, 120, 0.2);
    color: #68d391;
    border: 1px solid #68d391;
}

.review-status.incorrect {
    background: rgba(245, 101, 101, 0.2);
    color: #f56565;
    border: 1px solid #f56565;
}

.review-status.unanswered {
    background: rgba(237, 137, 54, 0.2);
    color: #ed8936;
    border: 1px solid #ed8936;
}

.review-feedback {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.review-feedback.correct {
    background: rgba(72, 187, 120, 0.1);
    border-left-color: #68d391;
    color: #a7f3d0;
}

.review-feedback.incorrect {
    background: rgba(245, 101, 101, 0.1);
    border-left-color: #f56565;
    color: #fbb6ce;
}

.review-feedback.unanswered {
    background: rgba(237, 137, 54, 0.1);
    border-left-color: #ed8936;
    color: #fbd38d;
}

.review-explanation {
    background: rgba(66, 153, 225, 0.1);
    border: 1px solid #4299e1;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.explanation-header {
    color: #4299e1;
    margin-bottom: 0.5rem;
}

.explanation-content {
    color: #e2e8f0;
    line-height: 1.6;
}

.study-recommendations {
    background: rgba(128, 90, 213, 0.1);
    border: 1px solid #805ad5;
    border-radius: 8px;
    padding: 1rem;
}

.recommendation-header {
    color: #b794f6;
    margin-bottom: 0.5rem;
}

.recommendation-content {
    color: #e2e8f0;
    line-height: 1.6;
}

/* Mobile Responsiveness for Enhanced Features */
@media (max-width: 768px) {
    .review-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .review-filters {
        justify-content: center;
    }
    
    .filter-btn {
        flex: 1;
        text-align: center;
        min-width: 0;
    }
    
    .review-question-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .question-number {
        text-align: center;
    }
}

@media (max-width: 479px) {
    .review-summary {
        padding: 1rem;
    }
    
    .answer-review-item[data-question-index] {
        padding: 1rem;
    }
    
    .review-question {
        font-size: 1rem;
    }
}

/* Responsive Feedback Modal */
@media (max-width: 768px) {
    .feedback-modal-container {
        padding: 0.5rem;
    }
    
    .feedback-modal-content {
        max-width: 100%;
        max-height: 95vh;
        border-radius: 16px;
    }
    
    .feedback-header {
        padding: 1.5rem 1.5rem 1rem;
    }
    
    .feedback-title h3 {
        font-size: 1.3rem;
    }
    
    .feedback-body {
        padding: 1.5rem;
        max-height: calc(95vh - 150px);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .feedback-actions {
        flex-direction: column-reverse;
        gap: 0.75rem;
    }
    
    .feedback-actions .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .feedback-modal-container {
        padding: 0.25rem;
    }
    
    .feedback-header {
        padding: 1rem;
    }
    
    .feedback-body {
        padding: 1rem;
    }
    
    .star-rating .star {
        font-size: 1.5rem;
    }
}

/* Responsive Results Page */
@media (max-width: 768px) {
    .results-header {
        padding: 1.5rem 0 1rem;
    }
    
    .results-header h1 {
        font-size: 2rem;
    }
    
    .performance-overview {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .score-card.primary {
        grid-row: span 1;
    }
    
    .score-card {
        padding: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
    }
    
    .detailed-review {
        padding: 1.5rem;
    }
    
    .results-actions {
        flex-direction: column;
        max-width: 100%;
    }
    
    .results-actions .btn {
        min-width: auto;
        width: 100%;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .results-badge {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .results-header h1 {
        font-size: 1.75rem;
    }
    
    .score-card,
    .detailed-review {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .score-circle {
        width: 100px;
        height: 100px;
    }
    
    .progress-ring {
        width: 100px;
        height: 100px;
    }
    
    .score-number {
        font-size: 1.5rem;
    }
}

/* About and Study Guide Pages Styles */
.page-header {
    padding: 2rem 0 1rem;
    border-bottom: 1px solid #4a5568;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #2d3748;
    color: #e2e8f0;
    border: 1px solid #4a5568;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    align-self: flex-start;
}

.back-btn:hover {
    background: #4a5568;
    border-color: #667eea;
    transform: translateX(-2px);
}

.page-title h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #e2e8f0;
    margin: 0 0 0.5rem 0;
}

.page-subtitle {
    font-size: 1.125rem;
    color: #a0aec0;
    margin: 0;
}

.about-content,
.study-guide-content {
    padding-bottom: 3rem;
}

.about-section,
.guide-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.content-card {
    background: #1F2937;
    border-radius: 12px;
    border: 1px solid #374151;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    transition: box-shadow 0.2s ease;
}

.content-card:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
    border-color: #2563EB;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    flex-shrink: 0;
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.card-content {
    padding: 1.5rem;
}

.card-content p {
    font-size: 1rem;
    color: #9CA3AF;
    line-height: 1.6;
    margin: 0 0 1.5rem 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.info-item h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: #9CA3AF;
    margin: 0 0 0.5rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-item p {
    font-size: 1.125rem;
    font-weight: 600;
    color: #F9FAFB;
    margin: 0;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.topic-item {
    padding: 1.5rem;
    background: #1F2937;
    border-radius: 8px;
    border-left: 4px solid #2563EB;
    border: 1px solid #374151;
}

.topic-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #F9FAFB;
    margin: 0 0 0.5rem 0;
}

.topic-item p {
    font-size: 0.875rem;
    color: #9CA3AF;
    margin: 0;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: #1F2937;
    border-radius: 8px;
    border: 1px solid #374151;
}

.feature-item svg {
    color: #2563EB;
    flex-shrink: 0;
}

.feature-item span {
    font-size: 0.875rem;
    color: #F9FAFB;
    font-weight: 500;
}

.study-timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.timeline-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.timeline-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2563EB 0%, #F59E0B 100%);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.timeline-content {
    flex: 1;
    padding-top: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #F9FAFB;
    margin: 0 0 0.5rem 0;
}

.timeline-content p {
    font-size: 1rem;
    color: #9CA3AF;
    margin: 0 0 1rem 0;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.timeline-content li {
    font-size: 0.875rem;
    color: #F9FAFB;
    padding: 0.25rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.timeline-content li::before {
    content: "•";
    color: #2563EB;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.resource-category h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #F9FAFB;
    margin: 0 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #2563EB;
}

.resource-category ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.resource-category li {
    font-size: 0.875rem;
    color: #F9FAFB;
    padding: 0.5rem 0;
    border-bottom: 1px solid #374151;
}

.resource-category li:last-child {
    border-bottom: none;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tip-item {
    padding: 1.5rem;
    background: #1F2937;
    border-radius: 12px;
    border: 1px solid #374151;
    text-align: center;
}

.tip-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.tip-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #F9FAFB;
    margin: 0 0 0.5rem 0;
}

.tip-item p {
    font-size: 0.875rem;
    color: #9CA3AF;
    margin: 0;
    line-height: 1.5;
}

.practice-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.step-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: #1F2937;
    border-radius: 12px;
    border-left: 4px solid #F59E0B;
    border: 1px solid #374151;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: #F59E0B;
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #F9FAFB;
    margin: 0 0 0.5rem 0;
}

.step-content p {
    font-size: 0.875rem;
    color: #9CA3AF;
    margin: 0;
    line-height: 1.5;
}

/* Responsive Design for New Pages */
@media (max-width: 768px) {
    .page-header {
        padding: 1.5rem 0 1rem;
    }
    
    .page-title h1 {
        font-size: 1.5rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .card-header {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
    
    .card-header h2 {
        font-size: 1.25rem;
    }
    
    .card-content {
        padding: 1rem;
    }
    
    .info-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .topics-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .topic-item {
        padding: 1rem;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .timeline-content {
        padding-top: 0;
    }
    
    .resources-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .step-item {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .back-btn {
        padding: 0.375rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .page-title h1 {
        font-size: 1.25rem;
    }
    
    .page-subtitle {
        font-size: 0.9rem;
    }
    
    .card-icon {
        width: 40px;
        height: 40px;
    }
    
    .timeline-marker {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .step-number {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}