/* Math Java Backend Integration Styles */

/* New Two-Column Layout Styles */
.math-layout {
    display: flex;
    min-height: 100vh;
    background: #f8f9fa;
}

/* Left Menu Navigation */
.math-left-menu {
    width: 320px;
    background: white;
    border-right: 1px solid #e1e5e9;
    box-shadow: 2px 0 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 200;
}

.menu-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e1e5e9;
}

.menu-header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.menu-header .breadcrumb {
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 0;
}

.menu-header .breadcrumb a {
    color: #3498db;
    text-decoration: none;
}

.menu-header .breadcrumb a:hover {
    text-decoration: underline;
}

.menu-tabs {
    padding: 1rem 0;
    border-bottom: 1px solid #e1e5e9;
}

.menu-tab {
    width: 100%;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #6c757d;
    border-left: 4px solid transparent;
}

.menu-tab:hover {
    background: #f8f9fa;
    color: #3498db;
}

.menu-tab.active {
    background: #e3f2fd;
    color: #1976d2;
    border-left-color: #1976d2;
}

.menu-tab .tab-icon {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.menu-tab .tab-text {
    font-size: 1rem;
    font-weight: 500;
}

/* Context info moved to left menu */
.aside-info {
    margin: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

/* Hide aside info when empty */
.aside-info:empty {
    display: none;
}

.aside-info h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.aside-info .level-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

/* Navigation controls moved to left menu */
.aside-navigation {
    margin: 1.5rem;
    margin-top: auto;
}

.aside-navigation .btn {
    width: 100%;
    margin-bottom: 0.5rem;
}

/* Main content area */
.math-main-content {
    flex: 1;
    margin-left: 320px;
    padding: 2rem;
    max-width: calc(100vw - 320px);
    height: calc(100vh - 0px);
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    box-sizing: border-box;
}

/* Tab content styles */
.tab-content {
    width: 100%;
}

/* Quiz placeholder styles */
.quiz-placeholder {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.placeholder-card {
    background: white;
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 600px;
    border: 1px solid #e1e5e9;
}

.placeholder-card h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.placeholder-card p {
    font-size: 1.1rem;
    color: #6c757d;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.placeholder-card ul {
    text-align: left;
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.placeholder-card li {
    margin-bottom: 0.75rem;
    color: #4a5568;
    font-size: 1rem;
}

.math-section {
    margin-bottom: 2rem;
}

.section-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid #e1e5e9;
}

/* Questions container styles for new layout */
.questions-container.all-questions {
    margin-top: 1rem;
}

.practice-controls {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid #e1e5e9;
}

.button-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.button-row:last-child {
    margin-bottom: 0;
}

.button-row .btn {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

/* Responsive design for mobile */
@media (max-width: 768px) {
    .math-layout {
        flex-direction: column;
    }
    
    .math-left-menu {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid #e1e5e9;
    }
    
    .math-main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 1rem;
    }
    
    .placeholder-card {
        padding: 2rem;
        margin: 1rem;
    }
    
    .button-row {
        flex-direction: column;
    }
    
    .button-row .btn {
        width: 100%;
    }
}

.level-selection-container {
    text-align: center;
    padding: 2rem;
}

.level-selection-container h2 {
    margin-bottom: 2rem;
    color: #333;
    font-size: 2rem;
}

.levels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.level-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 2rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.level-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.level-button h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
}

.level-button p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.9rem;
}

/* Enhanced Question Rendering */
.question-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid #e1e5e9;
}

.question-title h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.5rem;
}

.question-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #333;
    margin-bottom: 1.5rem;
    text-align: left;
}

/* LaTeX and Math Content */
.question-text .mjx-chtml {
    font-size: 1.1em !important;
}

.question-image {
    max-width: 100%;
    height: auto;
    margin: 1rem 0;
    border-radius: 8px;
    box-shadow: none !important; /* Remove shadow from question images */
}

/* Remove shadows from all images in quiz content */
.question-content img,
.question-text img,
.solution-text img,
.choice-text img {
    box-shadow: none !important;
}

/* Remove shadows from any image elements */
img {
    box-shadow: none !important;
}

/* Choice Styling */
.choices-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.choice-button {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    width: 100%;
}

.choice-button:hover {
    background: #e3f2fd;
    border-color: #2196f3;
    transform: translateX(4px);
}

.choice-button.selected {
    background: #e8f5e8;
    border-color: #4caf50;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

/* Choice styling - simplified for viewing only */
.choice-text {
    font-size: 1.1rem;
    line-height: 1.5;
    color: #1f2937;
    font-weight: 500;
    text-align: left;
}



.choice-content {
    flex: 1;
    font-size: 1.1rem;
    line-height: 1.5;
    color: #1f2937;
    font-weight: 500;
}

/* Choice Images */
.choice-image {
    max-width: 300px;
    height: auto;
    border-radius: 4px;
    box-shadow: none; /* Remove shadow from choice images */
}

/* LaTeX Choice Rendering */
.choice-content .mjx-chtml {
    font-size: 1.1em !important;
    display: inline-block;
}

/* LaTeX Math in choices */
.choice-content .MathJax {
    font-size: 1.1em !important;
}



/* Remove old choice-label styling conflict */
label.choice-label {
    font-weight: 500 !important;
    color: #1f2937 !important;
    min-width: unset !important;
    font-size: 1.1rem !important;
}

/* All Questions Layout */
.all-questions-display {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 1rem 0;
}

.question-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 2px solid #e5e7eb;
    transition: all 0.3s ease;
}

.question-card:hover {
    transform: translateY(-2px);
}

.question-card.correct {
    border-color: #10b981;
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
}

.question-card.incorrect {
    border-color: #ef4444;
    background: linear-gradient(135deg, #fef2f2 0%, #fefaf9 100%);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f3f4f6;
}

.question-header h3 {
    color: #1f2937;
    margin: 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.question-status {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.status-answered {
    color: #3b82f6;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
}

.status-correct {
    color: #059669;
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
}

.status-incorrect {
    color: #dc2626;
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.status-unanswered {
    color: #6b7280;
    background: #f9fafb;
    border: 1px solid #d1d5db;
}

.status-solution {
    color: #7c3aed;
    background: #f3e8ff;
    border: 1px solid #c4b5fd;
    font-size: 0.85rem;
    max-width: 400px;
    word-wrap: break-word;
}

/* Enhanced question content for all-questions view */
.all-questions .question-content {
    margin-bottom: 1.5rem;
}

.all-questions .question-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #374151;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 12px;
    border-left: 4px solid #3b82f6;
}

/* Answer section in all-questions view */
.all-questions .answer-section {
    margin-top: 1.5rem;
}

.all-questions .answer-choices {
    display: grid;
    gap: 0.8rem;
}

/* Sticky header section - contains everything that should stick */
.sticky-header-section {
    position: sticky;
    top: 0;
    background: white;
    padding: 1.5rem;
    border-radius: 0 0 16px 16px;
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.1);
    z-index: 100;
    border: 2px solid #e5e7eb;
    border-top: none;
    margin-bottom: 2rem;
}

/* Practice controls organization */
.questions-container.all-questions .practice-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.button-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.primary-actions {
    margin-bottom: 0.5rem;
}

.button-row .btn {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
}

/* Sticky header content styling */
.sticky-header-section .questions-header {
    text-align: center;
    margin-bottom: 1rem;
}

.sticky-header-section .questions-header h2 {
    margin: 0 0 0.5rem 0;
    color: #1f2937;
    font-size: 1.8rem;
    font-weight: 700;
}

.sticky-header-section .practice-info {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.sticky-header-section .level-badge {
    background: #7c3aed;
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.sticky-header-section .question-counter {
    background: #f3f4f6;
    color: #374151;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.sticky-header-section .question-navigation {
    text-align: center;
    margin: 1rem 0;
}

.sticky-header-section .back-button {
    background: #6b7280;
    color: white;
    border: 2px solid #6b7280;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.sticky-header-section .back-button:hover {
    background: #4b5563;
    border-color: #4b5563;
    transform: translateY(-1px);
}

.questions-container.all-questions .practice-controls .btn {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.btn-success {
    background: #10b981;
    color: white;
    border: 2px solid #10b981;
}

.btn-success:hover {
    background: #059669;
    border-color: #059669;
    transform: translateY(-2px);
}

.btn-warning {
    background: #f59e0b;
    color: white;
    border: 2px solid #f59e0b;
}

.btn-warning:hover {
    background: #d97706;
    border-color: #d97706;
    transform: translateY(-2px);
}

.btn-primary {
    background: #3b82f6;
    color: white;
    border: 2px solid #3b82f6;
}

.btn-primary:hover {
    background: #2563eb;
    border-color: #2563eb;
    transform: translateY(-2px);
}

/* Responsive design for all questions */
@media (max-width: 768px) {
    .question-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .question-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    /* Sticky header mobile adjustments */
    .sticky-header-section {
        padding: 1rem;
        border-radius: 0 0 12px 12px;
    }
    
    .sticky-header-section .questions-header h2 {
        font-size: 1.5rem;
    }
    
    .button-row {
        flex-direction: column;
        align-items: center;
    }
    
    .button-row .btn {
        width: 100%;
        max-width: 280px;
        min-width: auto;
    }
    
    .sticky-header-section .practice-info {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }
}

/* Progress and Navigation */
.question-progress {
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 500;
    color: #666;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.nav-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    padding: 0.75rem 2rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.nav-button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .levels-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .level-button {
        padding: 1.5rem 1rem;
    }
    
    .question-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .question-text {
        font-size: 1rem;
        padding: 0.75rem;
    }
    
    .choice-button {
        padding: 0.75rem;
    }
    
    .choice-content {
        font-size: 0.9rem;
    }
    
    .navigation-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-button {
        width: 100%;
    }
}

/* Year Selection Styles */
.year-selection-container {
    text-align: center;
    padding: 2rem;
}

.year-selection-container h2 {
    margin-bottom: 1.5rem;
    color: #1f2937;
    font-size: 2rem;
    font-weight: 700;
}

.years-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 2rem auto;
}

.year-button {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    border: none;
    border-radius: 16px;
    padding: 2rem 1.5rem;
    cursor: pointer;
    transition: all 0.4s ease;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
    position: relative;
    overflow: hidden;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.year-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.year-button:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.year-button:hover::before {
    left: 100%;
}

.year-button h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.8rem;
    font-weight: 800;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.year-button .year-description {
    margin: 0;
    opacity: 0.9;
    font-size: 1rem;
    font-weight: 500;
}

/* Personalized Training Button */
.personalized-training-section {
    margin: 3rem auto 2rem;
    max-width: 600px;
    text-align: center;
}

.personalized-training-button {
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 2.5rem 3rem;
    cursor: pointer;
    transition: all 0.4s ease;
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    position: relative;
    overflow: hidden;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    width: 100%;
    max-width: 500px;
    margin: 1rem auto;
    display: block;
}

.personalized-training-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

.personalized-training-button:hover {
    background: linear-gradient(135deg, #6d28d9 0%, #9333ea 100%);
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.5);
}

.personalized-training-button:hover::before {
    left: 100%;
}

.personalized-training-button .button-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.personalized-training-button .button-title {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    display: block;
}

.personalized-training-button .button-subtitle {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0.025em;
}

.training-option-divider {
    margin: 2rem auto;
    text-align: center;
    position: relative;
}

.training-option-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #e5e7eb, transparent);
}

.training-option-divider span {
    background: white;
    padding: 0 2rem;
    color: #6b7280;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Loading and Error States */
.loading-message {
    text-align: center;
    padding: 2rem;
    color: #666;
    font-style: italic;
}

.error-message {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    color: #856404;
    text-align: center;
}

/* Animation for question transitions */
.question-card {
    animation: fadeInSlide 0.5s ease-in-out;
}

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

/* Notification styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 400px;
    font-weight: 500;
    animation: slideInFromRight 0.3s ease-out;
}

.notification-info {
    background: #3b82f6;
    color: white;
}

.notification-success {
    background: #10b981;
    color: white;
}

.notification-warning {
    background: #f59e0b;
    color: white;
}

.notification-error {
    background: #ef4444;
    color: white;
}

.notification > div {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    position: relative;
}

.notification button {
    background: none;
    border: none;
    color: white;
    float: right;
    margin-left: 1rem;
    font-size: 1.2rem;
    cursor: pointer;
    font-weight: bold;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.notification button:hover {
    opacity: 1;
}

@keyframes slideInFromRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
} 

/* Responsive Design */
@media (max-width: 1200px) {
    .math-left-menu {
        width: 280px;
    }
    
    .math-main-content {
        margin-left: 280px;
        max-width: calc(100vw - 280px);
    }
}

@media (max-width: 768px) {
    .math-layout {
        flex-direction: column;
    }
    
    .math-left-menu {
        width: 100%;
        height: auto;
        position: relative;
        z-index: 200;
    }
    
    .menu-tabs {
        display: flex;
        padding: 0;
        border-bottom: none;
    }
    
    .menu-tab {
        flex: 1;
        padding: 1rem;
        justify-content: center;
        border-left: none;
        border-bottom: 4px solid transparent;
    }
    
    .menu-tab.active {
        border-left-color: transparent;
        border-bottom-color: #1976d2;
    }
    
    .math-main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 1rem;
    }
    
    .placeholder-card {
        padding: 2rem;
        margin: 1rem;
    }
    
    .button-row {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .button-row .btn {
        width: 100%;
    }
    
    .aside-info {
        margin: 1rem;
    }
    
    .aside-navigation {
        margin: 1rem;
    }
}

/* =============================================================================
   QUIZ FUNCTIONALITY STYLES
   ============================================================================= */

/* Quiz List Styles */
.quiz-list-container {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.quiz-list-container h2 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    text-align: center;
}

.quiz-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.quiz-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.quiz-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-color: #3498db;
}

.quiz-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.quiz-card-header h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin: 0;
    font-weight: 600;
}

.quiz-type-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.quiz-progress-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.progress-text {
    color: #6c757d;
}

.progress-percentage {
    color: #3498db;
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    transition: width 0.3s ease;
}

.quiz-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.quiz-date {
    color: #6c757d;
}

.quiz-status {
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-weight: 500;
}

.quiz-status.completed {
    background: #d4edda;
    color: #155724;
}

.quiz-status.in-progress {
    background: #fff3cd;
    color: #856404;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: #6c757d;
    margin-bottom: 2rem;
}

/* Quiz Creation Styles */
.create-quiz-container {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.create-quiz-container h2 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    text-align: center;
}

.quiz-creation-step {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.quiz-creation-step h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Quiz Taking Styles */
.quiz-taking-container {
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.quiz-header {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quiz-header h2 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin: 0;
}

.quiz-progress {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

#quizProgressText {
    font-size: 0.9rem;
    color: #6c757d;
    font-weight: 500;
}

.progress-bar {
    width: 200px;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    transition: width 0.3s ease;
}

.quiz-questions-display {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.quiz-question-card {
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
}

.quiz-question-card:hover {
    border-color: #3498db;
}

/* Fallback question styles */
.quiz-question-card .question-text {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.quiz-question-card .question-choices {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.quiz-question-card .choice-option {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: white;
}

.quiz-question-card .choice-option:hover {
    border-color: #3498db;
    background: #f8f9fa;
}

.quiz-question-card .choice-option input[type="radio"] {
    margin-right: 0.75rem;
    transform: scale(1.2);
}

.quiz-question-card .choice-option input[type="radio"]:checked + .choice-label {
    font-weight: 600;
    color: #1976d2;
}

.quiz-question-card .choice-label {
    font-size: 1rem;
    color: #2c3e50;
    cursor: pointer;
    flex: 1;
}

.quiz-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
}

.quiz-controls .btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quiz-controls .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Level and Year Selection for Quiz Creation */
.level-selection, .year-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

/* Year selection with scrollbar */
.year-selection {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 10px;
    border: 1px solid #e1e5e9;
    border-radius: 8px;
    background: #f8f9fa;
}

.year-selection::-webkit-scrollbar {
    width: 8px;
}

.year-selection::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.year-selection::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.year-selection::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

.level-button, .year-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 12px;
    padding: 1.5rem;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.level-button:hover, .year-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.level-button h3, .year-button h3 {
    font-size: 1.3rem;
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.level-button p, .year-button p {
    margin: 0 0 0.5rem 0;
    opacity: 0.9;
    font-size: 0.9rem;
}

.question-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    display: inline-block;
}

/* Responsive Design for Quiz */
@media (max-width: 768px) {
    .quiz-list {
        grid-template-columns: 1fr;
    }
    
    .quiz-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .quiz-progress {
        align-items: center;
    }
    
    .quiz-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .level-selection, .year-selection {
        grid-template-columns: 1fr;
    }
    
    .create-quiz-container, .quiz-taking-container {
        padding: 1rem;
    }
}

/* Solutions Page Styles */
.solutions-container {
    max-width: 100%;
    padding: 0;
    height: auto;
    min-height: calc(100vh - 4rem); /* Account for main content padding */
}

.solutions-container h2 {
    margin-bottom: 2rem;
    color: #2d3748;
    font-size: 2rem;
    font-weight: 600;
}

.solutions-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.solution-question-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
}

.question-header h3 {
    color: #4a5568;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #667eea;
}

.question-section, .choices-section, .answer-section, .solution-section {
    margin-bottom: 1.5rem;
}

.question-section h4, .choices-section h4, .answer-section h4, .solution-section h4 {
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.question-text {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    line-height: 1.6;
}

.choices-container {
    padding: 1.5rem;
    border-radius: 8px;
}

.text-choices {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.text-choice {
    padding: 0.75rem;
    background: white;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}

.image-choices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.image-choice {
    text-align: center;
    padding: 1rem;
    background: white;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}

.choice-image {
    max-width: 100%;
    height: auto;
    margin-top: 0.5rem;
}

.answer-section {
    background: #f0fff4;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #48bb78;
}

.correct-answer {
    color: #38a169;
    font-weight: 700;
    font-size: 1.2rem;
}

.solution-section {
    background: #fffaf0;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #ed8936;
}

.solution-content {
    margin-top: 0.75rem;
}

.solution-item {
    margin-bottom: 1.5rem;
}

.solution-item h4 {
    color: #c05621;
    margin-bottom: 0.75rem;
}

.solution-text {
    font-size: 1rem;
    line-height: 1.6;
}

/* Loading and Error States */
.loading-container, .error-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
    flex-direction: column;
}

.loading, .error-message {
    text-align: center;
    padding: 2rem;
    font-size: 1.1rem;
}

.error-message {
    color: #e53e3e;
    background: #fed7d7;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* Quiz List Container */
.quiz-list-container {
    max-width: 100%;
    padding: 0;
}

.quiz-list-container h2 {
    color: #1a202c;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.quiz-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Modern Quiz Card Design */
.quiz-item {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.8);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.quiz-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px 16px 0 0;
}

.quiz-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    border-color: rgba(102, 126, 234, 0.3);
}

.quiz-info {
    margin-bottom: 1.5rem;
}

.quiz-info h3 {
    color: #1a202c;
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.quiz-details {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.quiz-level {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.quiz-year {
    color: #4a5568;
    font-weight: 600;
    font-size: 1rem;
}

.quiz-questions {
    color: #718096;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.quiz-questions::before {
    content: "📝";
    font-size: 1rem;
}

.quiz-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 0.75rem;
}

.quiz-status.in_progress {
    background: linear-gradient(135deg, #bee3f8 0%, #90cdf4 100%);
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.quiz-status.in_progress::before {
    content: "⏳";
}

.quiz-status.completed {
    background: linear-gradient(135deg, #c6f6d5 0%, #9ae6b4 100%);
    color: #047857;
    border: 1px solid #a7f3d0;
}

.quiz-status.completed::before {
    content: "✅";
}

/* Modern Button Styling */
.quiz-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.quiz-actions .btn {
    flex: 1;
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.quiz-actions .btn-primary {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
}

.quiz-actions .btn-primary:hover {
    background: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
}

.quiz-actions .btn-secondary {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #475569;
    border: 1px solid #cbd5e0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.quiz-actions .btn-secondary:hover {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e0 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    color: #2d3748;
}

/* Empty State Styling */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

.empty-state p {
    color: #718096;
    font-size: 1.125rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.empty-state .btn {
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: 12px;
}

/* Tablet Optimization */
@media (min-width: 768px) and (max-width: 1024px) {
    .math-main-content {
        height: 100vh;
        overflow-y: auto;
        padding: 1.5rem;
    }
    
    .solution-question-container {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .solutions-container {
        min-height: calc(100vh - 3rem);
    }
}

/* Mobile Responsive Design */
@media (max-width: 767px) {
    .math-layout {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
    }
    
    .math-left-menu {
        width: 100%;
        height: auto;
        position: relative;
        order: 1;
    }
    
    .math-main-content {
        margin-left: 0;
        max-width: 100%;
        height: auto;
        overflow-y: visible;
        order: 2;
        padding: 1rem;
    }
    
    .quiz-list {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .quiz-item {
        padding: 1.5rem;
    }
    
    .quiz-info h3 {
        font-size: 1.25rem;
    }
    
    .quiz-details {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .quiz-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .quiz-actions .btn {
        flex: none;
        width: 100%;
    }
    
    .solution-question-container {
        padding: 1.5rem;
        margin: 0 0 1rem 0;
    }
    
    .question-header h3 {
        font-size: 1.3rem;
    }
    
    .image-choices {
        grid-template-columns: 1fr;
    }
}