.slide-generator-container {
        max-width: 800px;
        margin: 0 auto;
        padding: 2rem;
}

.upload-area {
    border: 3px dashed #28a745;
    border-radius: 15px;
    padding: 3rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: #218838;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.2);
}

.upload-area.dragover {
    border-color: #007bff;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.upload-icon {
    font-size: 4rem;
    color: #28a745;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.upload-area:hover .upload-icon {
    color: #218838;
    transform: scale(1.1);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.slide-options {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
}

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

.option-group label {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
    display: block;
}

.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: #28a745;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

.generate-btn {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border: none;
    border-radius: 50px;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
    background: linear-gradient(135deg, #218838 0%, #1dd1a1 100%);
}

.generate-btn:disabled {
    background: #6c757d;
    transform: none;
    box-shadow: none;
    cursor: not-allowed;
}

.file-preview {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-top: 1rem;
    border: 2px solid #e9ecef;
    display: none;
}

.file-preview.show {
    display: block;
    animation: fadeInUp 0.5s ease;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
    margin-bottom: 0.5rem;
}

.file-icon {
    font-size: 1.5rem;
    margin-right: 1rem;
    color: #28a745;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.875rem;
    color: #6c757d;
}

.remove-file {
    background: #dc3545;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.remove-file:hover {
    background: #c82333;
    transform: scale(1.1);
}

.progress-container {
    display: none;
    margin-top: 2rem;
}

.progress-container.show {
    display: block;
    animation: fadeInUp 0.5s ease;
}

.progress {
    height: 20px;
    border-radius: 10px;
    overflow: hidden;
    background: #e9ecef;
}

.progress-bar {
    background: linear-gradient(90deg, #28a745, #20c997);
    transition: width 0.3s ease;
}

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

.supported-formats {
    margin-top: 1rem;
    text-align: center;
}

.format-badge {
    display: inline-block;
    background: #e9ecef;
    color: #6c757d;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.875rem;
    margin: 0.25rem;
}

/* Content Source Selection */
.content-source-selection {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.content-option {
    position: relative;
}

.content-option input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.content-option-label {
    display: block;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    height: 100%;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.content-option-label:hover {
    border-color: #007bff;
    background: #f0f8ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.15);
}

.content-option input[type="radio"]:checked + .content-option-label {
    border-color: #28a745;
    background: #f0fff4;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.2);
}

.content-option-icon {
    font-size: 2.5rem;
    color: #6c757d;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.content-option input[type="radio"]:checked + .content-option-label .content-option-icon {
    color: #28a745;
}

.content-option-label h6 {
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.content-option-label small {
    color: #6c757d;
    font-size: 0.875rem;
}

/* Document Selection */
.document-selection, .subject-selection {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.document-list, .subject-list {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #e9ecef;
    border-radius: 10px;
    padding: 1rem;
}

.document-item, .subject-item {
    margin-bottom: 1rem;
}

.document-item:last-child, .subject-item:last-child {
    margin-bottom: 0;
}

.document-item-label, .subject-item-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.document-item-label:hover, .subject-item-label:hover {
    border-color: #007bff;
    background: #f0f8ff;
}

.document-item input[type="checkbox"]:checked + .document-item-label,
.subject-item input[type="radio"]:checked + .subject-item-label {
    border-color: #28a745;
    background: #f0fff4;
}

.document-item input[type="checkbox"],
.subject-item input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.document-info, .subject-info {
    flex: 1;
}

.document-title, .subject-title {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.25rem;
}

.subject-code {
    font-size: 0.875rem;
    color: #007bff;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.document-meta, .subject-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.subject-badge, .file-type, .page-count, .document-count {
    background: #e9ecef;
    color: #6c757d;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.subject-badge {
    background: #d1ecf1;
    color: #0c5460;
}

.file-type {
    background: #f8d7da;
    color: #721c24;
}

.document-count {
    background: #d4edda;
    color: #155724;
}

.subject-description {
    color: #6c757d;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

.document-icon, .subject-icon {
    font-size: 1.5rem;
    color: #6c757d;
    margin-left: 1rem;
}

.subject-icon {
    color: #007bff;
}

/* =============================================
   DARK MODE STYLES
   ============================================= */

[data-theme="dark"] .slide-generator-container {
    color: var(--text-primary);
}

/* Upload Area Dark Mode */
[data-theme="dark"] .upload-area {
    border-color: var(--success-color);
    background: linear-gradient(135deg, var(--background-dark) 0%, var(--chat-bg) 100%);
    color: var(--text-primary);
}

[data-theme="dark"] .upload-area:hover {
    border-color: var(--primary-dark);
    background: linear-gradient(135deg, var(--chat-bg) 0%, var(--background-light) 100%);
    box-shadow: 0 8px 25px rgba(52, 211, 153, 0.3);
}

[data-theme="dark"] .upload-area.dragover {
    border-color: var(--info-color);
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(56, 189, 248, 0.2) 100%);
}

[data-theme="dark"] .upload-icon {
    color: var(--success-color);
}

[data-theme="dark"] .upload-area:hover .upload-icon {
    color: var(--primary-dark);
}

/* Slide Options Dark Mode */
[data-theme="dark"] .slide-options,
[data-theme="dark"] .content-source-selection,
[data-theme="dark"] .document-selection,
[data-theme="dark"] .subject-selection {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .option-group label {
    color: var(--text-primary);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background: var(--input-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    border-color: var(--success-color);
    background: var(--input-bg);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(52, 211, 153, 0.25);
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-muted);
}

/* Content Options Dark Mode */
[data-theme="dark"] .content-option-label {
    background: var(--background-dark);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .content-option-label:hover {
    border-color: var(--info-color);
    background: var(--chat-bg);
}

[data-theme="dark"] .content-option input[type="radio"]:checked + .content-option-label {
    border-color: var(--success-color);
    background: var(--card-bg);
    box-shadow: 0 4px 15px rgba(52, 211, 153, 0.2);
}

[data-theme="dark"] .content-option-icon {
    color: var(--text-muted);
}

[data-theme="dark"] .content-option input[type="radio"]:checked + .content-option-label .content-option-icon {
    color: var(--success-color);
}

[data-theme="dark"] .content-option-label h6 {
    color: var(--text-primary);
}

[data-theme="dark"] .content-option-label small {
    color: var(--text-muted);
}

/* Document and Subject Lists Dark Mode */
[data-theme="dark"] .document-list,
[data-theme="dark"] .subject-list {
    border-color: var(--border-color);
    background: var(--background-dark);
}

[data-theme="dark"] .document-item-label,
[data-theme="dark"] .subject-item-label {
    background: var(--background-dark);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .document-item-label:hover,
[data-theme="dark"] .subject-item-label:hover {
    border-color: var(--info-color);
    background: var(--chat-bg);
}

[data-theme="dark"] .document-item input[type="checkbox"]:checked + .document-item-label,
[data-theme="dark"] .subject-item input[type="radio"]:checked + .subject-item-label {
    border-color: var(--success-color);
    background: var(--card-bg);
}

[data-theme="dark"] .document-title,
[data-theme="dark"] .subject-title {
    color: var(--text-primary);
}

[data-theme="dark"] .subject-code {
    color: var(--info-color);
}

[data-theme="dark"] .subject-description {
    color: var(--text-muted);
}

[data-theme="dark"] .subject-badge {
    background: rgba(56, 189, 248, 0.2);
    color: var(--info-color);
}

[data-theme="dark"] .file-type {
    background: rgba(248, 113, 113, 0.2);
    color: var(--danger-color);
}

[data-theme="dark"] .document-count {
    background: rgba(52, 211, 153, 0.2);
    color: var(--success-color);
}

[data-theme="dark"] .page-count {
    background: var(--border-color);
    color: var(--text-muted);
}

[data-theme="dark"] .document-icon,
[data-theme="dark"] .subject-icon {
    color: var(--text-muted);
}

[data-theme="dark"] .subject-icon {
    color: var(--info-color);
}

/* File Preview Dark Mode */
[data-theme="dark"] .file-preview {
    background: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .file-item {
    background: var(--background-dark);
    color: var(--text-primary);
}

[data-theme="dark"] .file-icon {
    color: var(--success-color);
}

[data-theme="dark"] .file-name {
    color: var(--text-primary);
}

[data-theme="dark"] .file-size {
    color: var(--text-muted);
}

[data-theme="dark"] .remove-file {
    background: var(--danger-color);
}

[data-theme="dark"] .remove-file:hover {
    background: #dc2626;
}

/* Generate Button Dark Mode */
[data-theme="dark"] .generate-btn {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--primary-dark) 100%);
    box-shadow: 0 4px 15px rgba(52, 211, 153, 0.3);
}

[data-theme="dark"] .generate-btn:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #059669 100%);
    box-shadow: 0 6px 20px rgba(52, 211, 153, 0.4);
}

[data-theme="dark"] .generate-btn:disabled,
[data-theme="dark"] .btn-secondary {
    background: var(--border-color);
    color: var(--text-muted);
    border-color: var(--border-color);
}

/* Progress Container Dark Mode */
[data-theme="dark"] .progress-container {
    background: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .progress {
    background-color: var(--border-color);
}

[data-theme="dark"] .progress-bar {
    background: linear-gradient(90deg, var(--success-color), var(--primary-dark));
}

/* Supported Formats Dark Mode */
[data-theme="dark"] .supported-formats {
    color: var(--text-muted);
}

[data-theme="dark"] .format-badge {
    background: var(--border-color);
    color: var(--text-muted);
}

/* Alert Messages Dark Mode */
[data-theme="dark"] .alert-success {
    background: rgba(52, 211, 153, 0.1);
    border-color: rgba(52, 211, 153, 0.3);
    color: var(--success-color);
}

[data-theme="dark"] .alert-warning {
    background: rgba(251, 191, 36, 0.1);
    border-color: rgba(251, 191, 36, 0.3);
    color: var(--warning-color);
}

[data-theme="dark"] .alert-danger {
    background: rgba(248, 113, 113, 0.1);
    border-color: rgba(248, 113, 113, 0.3);
    color: var(--danger-color);
}

/* Additional Bootstrap overrides for dark mode */
[data-theme="dark"] .text-primary {
    color: var(--primary-color) !important;
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .lead {
    color: var(--text-secondary);
}

[data-theme="dark"] .display-5 {
    color: var(--text-primary);
}

/* Button group and button outline styles */
[data-theme="dark"] .btn-outline-success {
    color: var(--success-color);
    border-color: var(--success-color);
}

[data-theme="dark"] .btn-outline-success:hover {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: var(--background-dark);
}

/* Custom slide count input */
[data-theme="dark"] #customSlideCount {
    background: var(--card-bg);
    border-color: var(--border-color);
}

/* Background image preview */
[data-theme="dark"] #bgPreview {
    border-color: var(--border-color);
}

/* Small text elements */
[data-theme="dark"] small.text-muted {
    color: var(--text-muted) !important;
}