.materials-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.upload-section {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.upload-section h2 {
    padding: 1.5rem;
    margin: 0;
    border-bottom: 1px solid #e5e7eb;
    color: #1f2937;
}

.upload-form {
    padding: 1.5rem;
}

.form-group {
    display: grid;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.upload-btn {
    background: #1a73e8;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.material-meta {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.class-tag,
.subject-tag {
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.class-tag {
    background-color: #e0f2fe;
    color: #0369a1;
}

.subject-tag {
    background-color: #f0fdf4;
    color: #166534;
}

.last-updated {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 1rem;
}

.view-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

.view-btn:hover {
    background-color: #45a049;
}

.download-btn {
    background-color: #f3f4f6;
    color: #374151;
    border: 1px solid #e5e7eb;
    text-decoration: none;
}

.download-btn:hover {
    background-color: #e5e7eb;
}

.filters {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    border: 1px solid #e5e7eb;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filter-group label {
    font-weight: 600;
    color: #374151;
    font-size: 0.95rem;
}

.filter-group select,
.filter-group input {
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: white;
    font-size: 0.95rem;
    color: #1f2937;
    transition: all 0.2s ease;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.filter-group select:hover,
.filter-group input:hover {
    border-color: #d1d5db;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.filter-group.search {
    grid-column: 1 / -1;
}

.filter-group.search input {
    width: 100%;
    padding-left: 2.5rem;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="%236B7280"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"/></svg>');
    background-repeat: no-repeat;
    background-position: 0.75rem center;
    background-size: 1.25rem;
}

@media (max-width: 768px) {
    .filters {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

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

    .material-card {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .material-actions {
        flex-direction: column;
    }

    .view-btn,
    .download-btn {
        width: 100%;
    }
}

/* Dashboard Section */
.dashboard-section {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.content-type-card {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.content-type-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.content-type-card i {
    font-size: 2rem;
    color: #1a73e8;
    margin-bottom: 1rem;
}

.content-type-card h3 {
    margin-bottom: 0.5rem;
    color: #334155;
}

.content-type-card p {
    color: #64748b;
    font-size: 0.875rem;
}

/* Material Card Updates */
.material-meta {
    display: flex;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

.class-tag {
    background: #e0f2fe;
    color: #0369a1;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
}

.last-updated {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.5rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #fff;
    z-index: 999;
    overflow-y: auto;
}

.modal-content {
    position: relative;
    padding: 20px;
    margin-top: 60px; /* Space for navbar */
}

.close {
    position: fixed;
    top: 80px; /* Position below navbar */
    right: 30px;
    font-size: 30px;
    font-weight: bold;
    color: #333;
    cursor: pointer;
    z-index: 1001;
}

.close:hover {
    color: #000;
}

/* Content Container Styles */
#markdown-content {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    line-height: 1.6;
    font-size: 16px;
    color: #333;
}

/* Image Handling */
#markdown-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Content Typography */
#markdown-content h1 {
    color: #1a73e8;
    margin: 1.5rem 0;
    font-size: 2rem;
    line-height: 1.2;
}

#markdown-content h2 {
    color: #2c5282;
    margin: 1.2rem 0;
    font-size: 1.5rem;
}

#markdown-content h3 {
    color: #2d3748;
    margin: 1rem 0;
    font-size: 1.25rem;
}

#markdown-content p {
    margin: 1rem 0;
    line-height: 1.8;
}

/* Lists Styling */
#markdown-content ul, 
#markdown-content ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

#markdown-content li {
    margin: 0.5rem 0;
}

/* Code Blocks */
#markdown-content pre {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1rem 0;
    font-family: monospace;
}

#markdown-content code {
    background-color: #f1f1f1;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

/* Tables */
#markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    overflow-x: auto;
    display: block;
}

#markdown-content th,
#markdown-content td {
    border: 1px solid #e2e8f0;
    padding: 0.75rem;
    text-align: left;
}

#markdown-content th {
    background-color: #f8f9fa;
}

/* Blockquotes */
#markdown-content blockquote {
    border-left: 4px solid #1a73e8;
    padding-left: 1rem;
    margin: 1rem 0;
    color: #4a5568;
    font-style: italic;
}

/* Material Meta Information */
#markdown-content .material-meta {
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

#markdown-content .material-meta span {
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
}

#markdown-content .class-tag {
    background-color: #e0f2fe;
    color: #0369a1;
}

#markdown-content .subject-tag {
    background-color: #f0fdf4;
    color: #166534;
}

/* Back Button */
.back-to-materials {
    position: fixed;
    top: 80px; /* Position below navbar */
    left: 30px;
    padding: 12px;
    width: 45px;
    height: 45px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.back-to-materials:hover {
    background-color: #45a049;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.back-to-materials i {
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .back-to-materials {
        top: 70px;
        left: 15px;
        width: 40px;
        height: 40px;
    }
    
    .back-to-materials i {
        font-size: 1rem;
    }
}

/* Hide materials container when modal is open */
.modal-open .materials-container {
    display: none;
}

/* Responsive Design */
@media (max-width: 1024px) {
    #markdown-content {
        max-width: 90%;
        padding: 15px;
    }
}

@media (max-width: 768px) {
    .modal-content {
        margin-top: 50px;
    }

    #markdown-content {
        font-size: 15px;
        padding: 10px;
    }

    #markdown-content h1 {
        font-size: 1.75rem;
    }

    .back-to-materials {
        top: 70px;
        left: 15px;
        padding: 8px 15px;
        font-size: 0.9rem;
    }

    .close {
        top: 70px;
        right: 15px;
    }
}

@media (max-width: 480px) {
    #markdown-content {
        max-width: 95%;
        padding: 10px;
    }

    #markdown-content h1 {
        font-size: 1.5rem;
    }

    .material-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Tab Styles */
.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5rem;
    position: relative;
}

.tab-btn {
    cursor: pointer;
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    font-size: 1rem;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.3s ease;
    position: relative;
    outline: none;
}

.tab-btn:hover {
    color: #4CAF50;
}

.tab-btn.active {
    color: #4CAF50;
    border-bottom: 2px solid #4CAF50;
    margin-bottom: -2px;
}

.tab-content {
    display: none;
}

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

/* Study Materials Grid */
#study-materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

/* Study Material Card Styles */
.study-material-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
}

.study-material-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 20px rgba(0,0,0,0.1);
}

.study-material-info {
    padding: 1.5rem;
    flex-grow: 1;
}

.study-material-title {
    color: #1f2937;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.material-actions {
    padding: 1rem 1.5rem;
    background-color: #f9fafb;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 1rem;
}

.material-actions .view-btn,
.material-actions .download-btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    flex: 1;
    justify-content: center;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #study-materials-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .material-actions {
        flex-direction: column;
    }

    .material-actions .view-btn,
    .material-actions .download-btn {
        width: 100%;
    }
}

.viewer-container {
    margin: 2rem 0;
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.viewer-container iframe {
    display: block;
    background: white;
    border-radius: 4px;
    width: 100%;
}

.unsupported-format {
    text-align: center;
    padding: 3rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.unsupported-format p {
    margin-bottom: 1.5rem;
    color: #666;
}

.unsupported-format .download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: #4CAF50;
    color: white;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.unsupported-format .download-btn:hover {
    background-color: #45a049;
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .viewer-container iframe {
        height: 500px;
    }
}

/* Content Display Styles */
.select-prompt,
.no-content {
    text-align: center;
    padding: 3rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin: 1rem 0;
}

.select-prompt i,
.no-content i {
    font-size: 3rem;
    color: #9ca3af;
    margin-bottom: 1rem;
}

.select-prompt p,
.no-content p {
    color: #6b7280;
    font-size: 1.1rem;
}

.content-display {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: 2rem;
    margin: 1rem 0;
}

.content-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.content-header h2 {
    color: #1f2937;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.content-body {
    line-height: 1.8;
    color: #374151;
    font-size: 1rem;
}

.content-body h1,
.content-body h2,
.content-body h3 {
    color: #1f2937;
    margin: 1.5rem 0 1rem;
}

.content-body p {
    margin-bottom: 1rem;
}

.content-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem auto;
    display: block;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-body img[width] {
    max-width: min(100%, 800px); /* Limit width to container or 800px, whichever is smaller */
    width: auto; /* Override any inline width */
    margin: 1.5rem auto;
}

.content-body .image-container {
    max-width: 800px;
    margin: 1.5rem auto;
    text-align: center;
}

.content-body .image-container img {
    max-width: 100%;
    height: auto;
    margin: 0;
}

@media (max-width: 1024px) {
    .content-body img[width] {
        max-width: min(100%, 600px);
    }
}

@media (max-width: 768px) {
    .content-body img[width] {
        max-width: 100%;
    }
    
    .content-body .image-container {
        max-width: 100%;
    }
}

.content-body ul,
.content-body ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.content-body li {
    margin: 0.5rem 0;
}

@media (max-width: 768px) {
    .content-display {
        padding: 1.5rem;
    }

    .content-header h2 {
        font-size: 1.25rem;
    }
}

/* Tab Styles */
.tab-content {
    display: none;
}

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

/* Ensure quiz tab content is properly styled */
#quiz-tab .container {
    padding: 0;
    margin: 0;
    max-width: none;
}

#quiz-tab #mainContent {
    display: block;
}

.file-hint {
    color: #6b7280;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

.file-attachment {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.75rem 0;
    padding: 0.5rem;
    background-color: #f3f4f6;
    border-radius: 4px;
}

.file-attachment i {
    color: #6b7280;
}

.file-attachment a {
    color: #2563eb;
    text-decoration: none;
}

.file-attachment a:hover {
    text-decoration: underline;
}

/* Content List Styles */
.content-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.content-count {
    color: #6b7280;
    font-size: 0.9rem;
}

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

.content-card {
    background: white;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    overflow: hidden;
    transition: all 0.2s ease;
}

.content-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.content-card-header {
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid #e5e7eb;
}

.content-card-header i {
    color: #4b5563;
    font-size: 1.2rem;
}

.content-card-header h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: #1f2937;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.content-card-meta {
    padding: 0.75rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.content-card-actions {
    padding: 0.75rem;
    background: #f9fafb;
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.action-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    color: white;
}

.action-btn.view-btn {
    background-color: #3b82f6;
}

.action-btn.edit-btn {
    background-color: #10b981;
}

.action-btn.download-btn {
    background-color: #6366f1;
}

.action-btn.delete-btn {
    background-color: #ef4444;
}

.action-btn:hover {
    transform: scale(1.05);
}

.no-content-message {
    text-align: center;
    padding: 3rem;
    color: #6b7280;
}

.no-content-message i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Enhanced Tab Navigation */
.tabs {
    background: white;
    padding: 1rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 1rem 2rem;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

/* Content Header */
.content-header {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.content-header h2 {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.content-header p {
    color: #6b7280;
}

/* Section Header */
.section-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.section-header h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #1f2937;
    margin: 0;
}

/* Form Grid Layout */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 1.5rem;
}

/* Enhanced File Upload */
.file-upload {
    position: relative;
}

.file-upload label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem;
    border: 2px dashed #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.file-upload label:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}

.file-upload input[type="file"] {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
}

.file-upload i {
    font-size: 1.5rem;
    color: #6b7280;
}

/* Upload Button */
.upload-btn {
    margin: 0 1.5rem 1.5rem;
    width: calc(100% - 3rem);
    background: #3b82f6;
    color: white;
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.upload-btn:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

/* Content List Enhancements */
.content-list {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .tabs {
        overflow-x: auto;
        white-space: nowrap;
        padding: 0.75rem;
    }
    
    .tab-btn {
        padding: 0.75rem 1.5rem;
    }
} 

/* Add these new styles for compact layout */

.upload-section.compact {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.upload-section.compact .section-header {
    padding: 0.75rem 1.25rem;
    background: #f8fafc;
    border-bottom: 1px solid #e5e7eb;
}

.upload-section.compact .section-header h3 {
    font-size: 1rem;
}

.form-grid-compact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.select-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.select-group .form-group {
    margin: 0;
}

.select-group .form-group label {
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
    color: #4b5563;
    display: block;
}

.select-group select {
    width: 100%;
    padding: 0.375rem 0.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    font-size: 0.875rem;
    height: 32px;
    background-color: #fff;
}

.file-upload-compact {
    position: relative;
    height: 100%;
    min-height: 32px;
}

.file-upload-compact label {
    height: 100%;
    min-height: 84px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    border: 2px dashed #e5e7eb;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.file-upload-compact label:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}

.file-upload-compact i {
    font-size: 1.25rem;
    color: #6b7280;
}

.file-upload-compact span {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
}

.file-upload-compact .file-hint {
    font-size: 0.7rem;
    line-height: 1.2;
    color: #6b7280;
    text-align: center;
}

.upload-section.compact .upload-btn {
    margin: 0.5rem 0.75rem 0.75rem;
    padding: 0.5rem;
    font-size: 0.875rem;
    height: 36px;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .form-grid-compact {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .file-upload-compact label {
        min-height: 76px;
    }
}

@media (max-width: 768px) {
    .select-group {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .file-upload-compact label {
        min-height: 84px;
        padding: 0.75rem 0.5rem;
    }
} 

/* Add styles for images in markdown content */
#markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Add a placeholder style for failed images */
#markdown-content img[src$="image-placeholder.png"] {
    background-color: #f5f5f5;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    position: relative;
}

#markdown-content img[src$="image-placeholder.png"]::after {
    content: 'Image failed to load';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666;
    font-size: 0.9rem;
} 

/* Add these styles for better image handling */
.markdown-image-wrapper {
    position: relative;
    margin: 1rem 0;
    min-height: 200px;
    background: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
}

.markdown-image-wrapper img {
    opacity: 0;
    transition: opacity 0.3s ease;
    position: relative;
    z-index: 2;
}

.markdown-image-wrapper img.image-loaded {
    opacity: 1;
}

.image-loading-placeholder,
.image-error-message {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: #666;
    z-index: 1;
}

.image-loading-placeholder {
    display: flex;
}

.image-error-message {
    display: none;
}

.markdown-image-wrapper img.image-error + .image-loading-placeholder {
    display: none;
}

.markdown-image-wrapper img.image-error + .image-loading-placeholder + .image-error-message {
    display: flex;
}

.markdown-image-wrapper img.image-loaded + .image-loading-placeholder {
    display: none;
} 

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dashboard-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a73e8;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    margin-top: 0.5rem;
} 

/* Quiz & Assignment Styles */
.question-container {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.question-header h4 {
    margin: 0;
    color: #374151;
}

.remove-question-btn {
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
}

.add-question-btn {
    padding: 0.75rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: white;
    transition: transform 0.2s;
    margin: 0;
}

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

.add-question-btn.mcq {
    background: #10b981;
}

.add-question-btn.true-false {
    background: #3b82f6;
}

.add-question-btn.short {
    background: #8b5cf6;
}

.mcq-options,
.true-false-options,
.short-answer-field {
    margin-top: 1rem;
}

.type-tag {
    background-color: #e0f2fe;
    color: #0369a1;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
}

#questions-container {
    margin: 1rem 0;
}

#assignment-container {
    margin: 1rem 0;
} 

/* Teacher Quiz Styles */
.quiz-section {
    margin-top: 2rem;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

#quiz-container {
    margin: 1.5rem -1.5rem -1.5rem -1.5rem;
    padding: 0 1.5rem 1.5rem;
    background: #f8fafc;
}

#quiz-container .section-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

#quiz-container .section-header h4 {
    font-size: 1.1rem;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#quiz-container .section-description {
    color: #6b7280;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.question-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1rem;
} 

/* Quiz Preview Modal Styles */
.quiz-preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    color: #666;
}

.close-modal:hover {
    color: #000;
}

.quiz-meta {
    margin-bottom: 20px;
}

.question-preview {
    border: 1px solid #ddd;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.options-preview .option {
    display: flex;
    align-items: center;
    padding: 8px;
    margin: 5px 0;
    background-color: #f5f5f5;
    border-radius: 4px;
}

.options-preview .option.correct {
    background-color: #e8f5e9;
}

.correct-badge {
    margin-left: auto;
    color: #4caf50;
    font-weight: bold;
}

.option-label {
    font-weight: bold;
    margin-right: 10px;
}

.true-false-preview {
    display: flex;
    gap: 20px;
}

.true-false-preview .option {
    padding: 8px 15px;
    background-color: #f5f5f5;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.true-false-preview .option.correct {
    background-color: #e8f5e9;
}

.sample-answer {
    padding: 10px;
    background-color: #f5f5f5;
    border-radius: 4px;
} 

.quiz-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    padding: 1rem;
}

.quiz-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem;
}

.quiz-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.quiz-container {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.quiz-timer {
    background: #f0f0f0;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: bold;
}

.quiz-question {
    margin-bottom: 2rem;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.quiz-options {
    margin-top: 1rem;
}

.quiz-option {
    margin: 0.5rem 0;
}

.submit-quiz-btn {
    background: #4CAF50;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.submit-quiz-btn:hover {
    background: #45a049;
} 

/* Add these styles to your existing CSS */
.quiz-grid {
    display: grid;
    gap: 1rem;
    padding: 1rem;
}

.quiz-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.quiz-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem;
    transition: transform 0.2s;
}

.quiz-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.quiz-card-header {
    margin-bottom: 1rem;
}

.quiz-card-header h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
}

.quiz-meta {
    display: flex;
    gap: 0.5rem;
}

.quiz-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #666;
}

.quiz-info span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.quiz-info .urgent {
    color: #dc3545;
}

.start-quiz-btn {
    width: 100%;
    padding: 0.5rem;
    margin-top: 1rem;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.start-quiz-btn:hover {
    background: #0056b3;
}

.loading-message,
.no-content-message,
.error-message {
    text-align: center;
    padding: 2rem;
    color: #666;
}

.loading-message i,
.no-content-message i,
.error-message i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #999;
}

.error-message {
    color: #dc3545;
}

.error-message small {
    display: block;
    margin-top: 0.5rem;
    color: #666;
} 

.quiz-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
}

.quiz-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px;
}

.quiz-card-header {
    margin-bottom: 10px;
}

.quiz-card-body {
    margin-bottom: 15px;
}

.quiz-info {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.quiz-card-actions {
    text-align: right;
}

.start-quiz-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
}

.start-quiz-btn:hover {
    background: #45a049;
}