.hidden {
    display: none !important;
}

:root {
    --mauxanhtoinen: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
}
.epic-preloader__title-word {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
/* ==============================index.html======================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    background-attachment: fixed;
    min-height: 100vh;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    margin-top: 80px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 15px;
}

.format-counter {
    background: rgba(255,255,255,0.2);
    padding: 10px 20px;
    border-radius: 25px;
    display: inline-block;
    backdrop-filter: blur(10px);
}

.format-counter span {
    font-size: 1.5rem;
    font-weight: bold;
    color: #FFD700;
}

.main-content {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

/* Supported Formats Section */
.supported-formats {
    margin-top: 20px;
    text-align: center;
}

.toggle-formats {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.toggle-formats:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3);
}

.formats-list {
    margin-top: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 15px;
    text-align: left;
}

.format-category {
    margin-bottom: 20px;
}

.format-category h4 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.format-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.format-tags span {
    background: #667eea;
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Upload Section */
.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9ff;
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f0f2ff;
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #4CAF50;
    background: #e8f5e8;
}

.upload-icon {
    color: #667eea;
    margin-bottom: 20px;
}

.upload-area h3 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.upload-area p {
    color: #666;
    font-size: 0.9rem;
}

/* Preview Section */
.preview-section {
    margin: 30px 0;
    text-align: center;
}

.image-preview {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 20px;
    display: inline-block;
    max-width: 100%;
}

.image-preview img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.image-info {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.image-info span {
    background: #667eea;
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Format Selection */
.format-selection h3 {
    margin-bottom: 25px;
    color: #333;
    font-size: 1.4rem;
}

.format-group {
    margin-bottom: 30px;
}

.format-group h4 {
    color: #555;
    margin-bottom: 15px;
    font-size: 1.1rem;
    padding-left: 10px;
    border-left: 4px solid #667eea;
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.format-option {
    cursor: pointer;
}

.format-option input[type="radio"] {
    display: none;
}

.format-card {
    display: block;
    padding: 18px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    background: #f8f9fa;
    height: 100%;
}

.format-card:hover {
    border-color: #667eea;
    background: #f0f2ff;
    transform: translateY(-2px);
}

.format-option input[type="radio"]:checked + .format-card {
    border-color: #667eea;
    background: #667eea;
    color: white;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.format-card strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.format-card small {
    font-size: 0.85rem;
    opacity: 0.8;
    line-height: 1.3;
}

/* Advanced Settings */
.advanced-settings {
    margin: 40px 0;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
}

.advanced-settings h3 {
    margin-bottom: 25px;
    color: #333;
    font-size: 1.3rem;
}

.setting-group {
    margin-bottom: 25px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.setting-group label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: #333;
}

/* Quality Slider */
#qualitySlider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
    margin-bottom: 15px;
}

#qualitySlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.quality-presets, .size-presets {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.preset-btn, .size-preset {
    background: #e9ecef;
    border: 1px solid #dee2e6;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.preset-btn:hover, .size-preset:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* Resize Controls */
.resize-inputs {
    margin-top: 15px;
}

.dimension-inputs {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.dimension-inputs input[type="number"] {
    width: 140px;
    padding: 10px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.dimension-inputs input[type="number"]:focus {
    border-color: #667eea;
    outline: none;
}

.dimension-inputs span {
    font-size: 1.2rem;
    font-weight: bold;
    color: #666;
}

.resize-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Color Space Select */
#colorSpace {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 0.9rem;
    background: white;
    transition: border-color 0.3s ease;
}

#colorSpace:focus {
    border-color: #667eea;
    outline: none;
}

/* Batch Processing */
.batch-section {
    margin: 30px 0;
    padding: 25px;
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 15px;
}

.batch-section h3 {
    margin-bottom: 15px;
    color: #856404;
}

.batch-controls {
    margin-top: 15px;
}

.batch-select-btn {
    background: #ffc107;
    color: #212529;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.batch-select-btn:hover {
    background: #e0a800;
    transform: translateY(-1px);
}

.batch-list {
    margin-top: 15px;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    background: white;
}

/* Buttons */
.convert-btn, .download-btn, .download-all-btn, .reset-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 10px;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.convert-btn:hover, .download-btn:hover, .download-all-btn:hover, .reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.convert-btn {
    width: 100%;
    margin: 25px 0;
    font-size: 1.2rem;
    padding: 20px;
}

.download-all-btn {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
}

.reset-btn {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
}

/* Download Section */
.download-section {
    text-align: center;
    margin-top: 40px;
}

.download-preview {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 30px;
}

.download-preview img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    margin-bottom: 25px;
}

.download-info h3 {
    color: #4CAF50;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.conversion-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 25px 0;
    text-align: left;
}

.stat-item {
    background: white;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.stat-label {
    font-weight: 600;
    color: #666;
    display: block;
    margin-bottom: 5px;
}

.download-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 25px;
}

/* Filename Editor */
.setting-group .filename-input-group {
    display: flex;
    align-items: center;
    gap: 0;
    background: white;
    border: 2px solid #94a3b8;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin-top: 10px;
}

.setting-group .filename-input-group:focus-within {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.setting-group input[type="text"]#customFileName {
    flex: 1;
    padding: 12px 15px;
    border: none;
    outline: none;
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    color: #1e293b;
    background: transparent;
}

.setting-group input[type="text"]#customFileName::placeholder {
    color: #94a3b8;
    font-style: italic;
}

.setting-group .file-extension {
    padding: 12px 15px;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    white-space: nowrap;
    box-shadow: -2px 0 4px rgba(0, 0, 0, 0.1);
}

.setting-group .filename-hint {
    display: block;
    margin-top: 8px;
    color: #64748b;
    font-size: 0.85rem;
    font-style: italic;
}

/* Old Filename Editor styles - keep for backward compatibility */
.filename-editor {
    margin: 25px 0;
    padding: 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    border: 2px solid #cbd5e1;
    animation: fadeInUp 0.5s ease-out;
}

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

.filename-editor label {
    display: block;
    font-weight: 600;
    color: #334155;
    margin-bottom: 10px;
    font-size: 1rem;
}

.filename-input-group {
    display: flex;
    align-items: center;
    gap: 0;
    background: white;
    border: 2px solid #94a3b8;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filename-input-group:focus-within {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.filename-editor input[type="text"] {
    flex: 1;
    padding: 12px 15px;
    border: none;
    outline: none;
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    color: #1e293b;
    background: transparent;
}

.filename-editor input[type="text"]::placeholder {
    color: #94a3b8;
    font-style: italic;
}

.file-extension {
    padding: 12px 15px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    white-space: nowrap;
    box-shadow: -2px 0 4px rgba(0, 0, 0, 0.1);
}

.filename-hint {
    display: block;
    margin-top: 8px;
    color: #64748b;
    font-size: 0.85rem;
    font-style: italic;
}

.footer {
    text-align: center;
    color: white;
    opacity: 0.8;
    font-size: 0.9rem;
}

.footer p {
    margin-bottom: 5px;
}

/* Loading Animation */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #fff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 2.2rem;
    }
    
    .format-grid {
        grid-template-columns: 1fr;
    }
    
    .dimension-inputs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .dimension-inputs input[type="number"] {
        width: 100%;
    }
    
    .image-info {
        flex-direction: column;
        gap: 10px;
    }
    
    .conversion-stats {
        grid-template-columns: 1fr;
    }
    
    .download-actions {
        flex-direction: column;
    }
    
    .quality-presets, .size-presets {
        justify-content: center;
    }
    
    /* Filename Editor Mobile */
    .filename-editor {
        padding: 15px;
    }
    
    .filename-editor label {
        font-size: 0.9rem;
    }
    
    .filename-editor input[type="text"] {
        font-size: 0.9rem;
        padding: 10px 12px;
    }
    
    .file-extension {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
}

/* Animation cho format cards */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.format-group {
    animation: slideIn 0.5s ease-out;
}

/* Hover effects cho các nút */
.preset-btn:active, .size-preset:active {
    transform: scale(0.95);
}

/* Progress bar cho conversion */
.progress-bar {
    width: 100%;
    height: 6px;
    background: #e9ecef;
    border-radius: 3px;
    overflow: hidden;
    margin: 15px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}
/* Mode Selector */
.upload-modes {
    margin-bottom: 30px;
}

.mode-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.mode-option {
    cursor: pointer;
}

.mode-option input[type="radio"] {
    display: none;
}

.mode-card {
    display: block;
    padding: 20px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.mode-card:hover {
    border-color: #667eea;
    background: #f0f2ff;
    transform: translateY(-2px);
}

.mode-option input[type="radio"]:checked + .mode-card {
    border-color: #667eea;
    background: #667eea;
    color: white;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.mode-card strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.mode-card small {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* File Preview Grid */
.file-preview-grid {
    margin-top: 30px;
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
}

.grid-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.grid-header h3 {
    color: #333;
    margin: 0;
}

.grid-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.control-btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.control-btn:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
}

.control-btn.danger {
    background: #dc3545;
}

.control-btn.danger:hover {
    background: #c82333;
}

/* File Grid */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.file-item {
    background: white;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
}

.file-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.file-item.selected {
    border: 2px solid #667eea;
    background: #f0f2ff;
}

.file-item.processing {
    opacity: 0.6;
    pointer-events: none;
}

.file-checkbox {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.file-preview {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 10px;
    background: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #6c757d;
}

.file-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

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

.file-name {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 5px;
    word-break: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.file-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 8px;
}

.file-status {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: #e9ecef;
    color: #495057;
}

.file-status.ready {
    background: #d4edda;
    color: #155724;
}

.file-status.processing {
    background: #fff3cd;
    color: #856404;
}

.file-status.completed {
    background: #d1ecf1;
    color: #0c5460;
}

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

.file-actions {
    display: flex;
    gap: 5px;
    margin-top: 8px;
}

.file-action-btn {
    flex: 1;
    background: #6c757d;
    color: white;
    border: none;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.file-action-btn:hover {
    background: #5a6268;
}

.file-action-btn.remove {
    background: #dc3545;
}

.file-action-btn.remove:hover {
    background: #c82333;
}

/* Grid Footer */
.grid-footer {
    border-top: 1px solid #dee2e6;
    padding-top: 15px;
}

.selection-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 0.9rem;
    color: #495057;
}

/* Quick Actions */
.quick-actions {
    margin-top: 20px;
    padding: 20px;
    background: #fff3cd;
    border-radius: 10px;
    border: 1px solid #ffeaa7;
}

.quick-actions h3 {
    color: #856404;
    margin-bottom: 15px;
}

.action-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.action-btn {
    background: #ffc107;
    color: #212529;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.action-btn:hover {
    background: #e0a800;
    transform: translateY(-1px);
}

/* Progress indicators */
.progress-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

.progress-circle {
    width: 40px;
    height: 40px;
    border: 3px solid #e9ecef;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Drag and drop states for multiple files */
.file-grid.drag-over {
    border: 2px dashed #667eea;
    background: #f0f2ff;
}

/* Responsive design */
@media (max-width: 768px) {
    .mode-selector {
        grid-template-columns: 1fr;
    }
    
    .grid-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .grid-controls {
        justify-content: center;
    }
    
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .selection-info {
        flex-direction: column;
        text-align: center;
    }
    
    .action-buttons {
        justify-content: center;
    }
}

/* Animation for file items */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.file-item {
    animation: slideInUp 0.3s ease-out;
}

/* Batch progress bar */
.batch-progress {
    margin: 20px 0;
    background: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
    height: 8px;
}

.batch-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

.batch-progress-text {
    text-align: center;
    margin-top: 10px;
    font-size: 0.9rem;
    color: #495057;
}
.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9ff;
    position: relative;
    z-index: 1;
}

.upload-area * {
    pointer-events: none; /* Ngăn các element con chặn click */
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f0f2ff;
    transform: translateY(-2px);
}
/* Show More/Less Button */
.show-more-section {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.show-more-btn {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.show-more-btn:hover {
    background: linear-gradient(135deg, #218838 0%, #1e7e34 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
}

.show-more-btn.collapse {
    background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
}

.show-more-btn.collapse:hover {
    background: linear-gradient(135deg, #5a6268 0%, #343a40 100%);
}

.show-more-info {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #6c757d;
}

/* Animation cho file items */
.file-item.show-animation {
    animation: fadeInUp 0.3s ease-out;
}

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

/* Sharpen Settings */
.sharpen-group {
    margin-bottom: 25px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.sharpen-control {
    margin-bottom: 15px;
}

.sharpen-control label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #333;
}

#sharpenSlider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
    margin-bottom: 15px;
}

#sharpenSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #28a745;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.sharpen-presets {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.sharpen-preset {
    background: #e8f5e9;
    border: 1px solid #4caf50;
    color: #2e7d32;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.sharpen-preset:hover {
    background: #4caf50;
    color: white;
}

.compression-info {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.9rem;
    color: #856404;
}
/* Sharpen Settings - Ẩn ban đầu */
.sharpen-control {
    display: none !important;
    margin-top: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    transition: all 0.3s ease;
}

.sharpen-control.show {
    display: block !important;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        max-height: 300px;
        transform: translateY(0);
    }
}

/* Checkbox styling */
#sharpenEnabled {
    margin-right: 8px;
    transform: scale(1.2);
}
/* Thêm vào CSS */
.quality-warning {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    padding: 10px;
    border-radius: 5px;
    margin-top: 10px;
    font-size: 0.85rem;
    color: #856404;
}

.quality-warning.error {
    background: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}
/* Reset và Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Header Sticky */
.doitenhinhanhsticky__header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 10px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    /* position: sticky; */
    z-index: 1000;
    transition: all 0.3s ease;
}

.doitenhinhanhsticky__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Logo Section */
.doitenhinhanhsticky__logo {
    flex-shrink: 0;
    z-index: 1001;
    background: #fff;
    border-radius: 50%;
    padding: 4px;
    position: relative;
    overflow: hidden;
}

/* Hiệu ứng gradient border xoay tròn */
.doitenhinhanhsticky__logo::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: linear-gradient(45deg, #667eea, #764ba2, #f093fb, #667eea);
    background-size: 400% 400%;
    border-radius: 50%;
    z-index: -1;
    animation: logoGradientRotate 3s ease infinite;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.doitenhinhanhsticky__logo:hover::before {
    opacity: 1;
}

@keyframes logoGradientRotate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.doitenhinhanhsticky__logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
    font-weight: 700;
    font-size: 1.5rem;
    position: relative;
}

.doitenhinhanhsticky__logo-image {
    height: 40px;
    width: auto;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    position: relative;
    z-index: 1;
}

/* Hiệu ứng khi hover */
.doitenhinhanhsticky__logo-link:hover .doitenhinhanhsticky__logo-image {
    transform: scale(1.15) rotate(5deg);
    filter: drop-shadow(0 8px 16px rgba(102, 126, 234, 0.4));
}

/* Hiệu ứng bounce nhẹ khi load trang */
.doitenhinhanhsticky__logo-image {
    animation: logoEntrance 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.3s backwards;
}

@keyframes logoEntrance {
    0% {
        opacity: 0;
        transform: scale(0) rotate(-180deg);
    }
    60% {
        transform: scale(1.2) rotate(10deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

/* Hiệu ứng shine (ánh sáng chạy qua) */
.doitenhinhanhsticky__logo-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.6), 
        transparent
    );
    transition: left 0.5s ease;
    border-radius: 50%;
    pointer-events: none;
}

.doitenhinhanhsticky__logo-link:hover::after {
    left: 100%;
}

/* Hiệu ứng pulse nhẹ liên tục */
.doitenhinhanhsticky__logo {
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(102, 126, 234, 0.1);
    }
}

.doitenhinhanhsticky__logo-text {
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Mobile Menu Checkbox (ẩn) */
.doitenhinhanhsticky__mobile-checkbox {
    display: none;
}

/* Mobile Menu Toggle */
.doitenhinhanhsticky__mobile-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
    width: 30px;
    height: 30px;
    justify-content: space-between;
    z-index: 1001;
    transition: all 0.3s ease;
}

.doitenhinhanhsticky__mobile-toggle-line {
    width: 100%;
    height: 3px;
    background: #333;
    background: #ffffffff;
    transition: all 0.3s ease;
    border-radius: 2px;
    transform-origin: center;
}

/* Animation cho mobile menu toggle khi checked */
.doitenhinhanhsticky__mobile-checkbox:checked + .doitenhinhanhsticky__mobile-toggle .doitenhinhanhsticky__mobile-toggle-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.doitenhinhanhsticky__mobile-checkbox:checked + .doitenhinhanhsticky__mobile-toggle .doitenhinhanhsticky__mobile-toggle-line:nth-child(2) {
    opacity: 0;
}

.doitenhinhanhsticky__mobile-checkbox:checked + .doitenhinhanhsticky__mobile-toggle .doitenhinhanhsticky__mobile-toggle-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Navigation Menu */
.doitenhinhanhsticky__nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.doitenhinhanhsticky__nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.doitenhinhanhsticky__nav-item {
    position: relative;
}

.doitenhinhanhsticky__nav-link {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    text-decoration: none;
    color: #ffffffff;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 8px;
    position: relative;
}

.doitenhinhanhsticky__nav-link:hover,
.doitenhinhanhsticky__nav-link--active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.doitenhinhanhsticky__nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.doitenhinhanhsticky__nav-link:hover::after,
.doitenhinhanhsticky__nav-link--active::after {
    width: 80%;
}

/* Dropdown Menu */
.doitenhinhanhsticky__nav-arrow {
    margin-left: 5px;
    border: solid #ffffffff;
    border-width: 0 2px 2px 0;
    display: inline-block;
    padding: 3px;
    transform: rotate(45deg);
    transition: transform 0.3s ease;
}

.doitenhinhanhsticky__nav-item--dropdown:hover .doitenhinhanhsticky__nav-arrow {
    transform: rotate(225deg);
}

.doitenhinhanhsticky__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
    padding: 0.5rem 0;
    margin-top: 10px;
}

.doitenhinhanhsticky__nav-item--dropdown:hover .doitenhinhanhsticky__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.doitenhinhanhsticky__dropdown-item {
    padding: 0;
}

.doitenhinhanhsticky__dropdown-link {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
}

.doitenhinhanhsticky__dropdown-link:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

/* CTA Button */
.doitenhinhanhsticky__cta {
    flex-shrink: 0;
}

.doitenhinhanhsticky__cta-button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

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

/* Main Content */
.doitenhinhanhsticky__main {
    margin-top: 70px;
    min-height: 100vh;
}

.doitenhinhanhsticky__hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.doitenhinhanhsticky__hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.doitenhinhanhsticky__hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.doitenhinhanhsticky__hero-description {
    font-size: 1.2rem;
    opacity: 0.9;
}

.doitenhinhanhsticky__content {
    padding: 2rem 0;
}

.doitenhinhanhsticky__content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .doitenhinhanhsticky__container {
        padding: 0 15px;
    }
    
    /* Hiển thị mobile toggle */
    .doitenhinhanhsticky__mobile-toggle {
        display: flex;
    }
    
    /* Ẩn CTA button trên mobile */
    .doitenhinhanhsticky__cta {
        display: none;
    }
    
    /* Navigation mobile */
    .doitenhinhanhsticky__nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    /* Hiển thị nav khi checkbox được check */
    .doitenhinhanhsticky__mobile-checkbox:checked ~ .doitenhinhanhsticky__nav {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .doitenhinhanhsticky__nav-list {
        flex-direction: column;
        gap: 0;
        padding: 0 1rem;
    }
    
    .doitenhinhanhsticky__nav-link {
        padding: 1rem;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        justify-content: space-between;
    }
    
    .doitenhinhanhsticky__nav-link::after {
        display: none;
    }
    
    /* Dropdown mobile */
    .doitenhinhanhsticky__dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(102, 126, 234, 0.05);
        margin: 0;
        border-radius: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .doitenhinhanhsticky__nav-item--dropdown:hover .doitenhinhanhsticky__dropdown {
        max-height: 200px;
    }
    
    .doitenhinhanhsticky__nav-item--dropdown .doitenhinhanhsticky__nav-link {
        border-bottom: none;
    }
    
    .doitenhinhanhsticky__hero-title {
        font-size: 2rem;
    }
    .doitenhinhanhsticky__nav-link {
        color: #000;
    }
    .doitenhinhanhsticky__nav-arrow {
        border-color: #000;
    }
}

@media (max-width: 480px) {
    .doitenhinhanhsticky__container {
        height: 60px;
    }
    
    .doitenhinhanhsticky__main {
        margin-top: 60px;
    }
    
    .doitenhinhanhsticky__nav {
        top: 60px;
    }
    
    .doitenhinhanhsticky__logo-text {
        font-size: 1.2rem;
    }
    
    .doitenhinhanhsticky__hero-title {
        font-size: 1.8rem;
    }
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Focus styles cho accessibility */
.doitenhinhanhsticky__nav-link:focus,
.doitenhinhanhsticky__cta-button:focus,
.doitenhinhanhsticky__mobile-toggle:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* ===============================lienhe.html================================= */

/* Container */
.dvnt-lienhe__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Section */
.dvnt-lienhe__header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    color: white;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    background-attachment: fixed;
}

.dvnt-lienhe__header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.dvnt-lienhe__title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.dvnt-lienhe__subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

/* Main Content */
.dvnt-lienhe__content {
    padding: 80px 0;
}

.dvnt-lienhe__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

/* Contact Info */
.dvnt-lienhe__info {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.dvnt-lienhe__info-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: #2d3748;
}

.dvnt-lienhe__info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    padding: 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.dvnt-lienhe__info-item:hover {
    background-color: #f7fafc;
    transform: translateY(-2px);
}

.dvnt-lienhe__info-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    flex-shrink: 0;
}

.dvnt-lienhe__info-icon i {
    color: white;
    font-size: 1.2rem;
}

.dvnt-lienhe__info-content {
    flex: 1;
}

.dvnt-lienhe__info-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 5px;
}

.dvnt-lienhe__info-text {
    color: #718096;
    margin-bottom: 3px;
}

.dvnt-lienhe__info-link {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

.dvnt-lienhe__info-link:hover {
    color: #764ba2;
}

/* Social Media */
.dvnt-lienhe__social {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid #e2e8f0;
}

.dvnt-lienhe__social-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #2d3748;
}

.dvnt-lienhe__social-links {
    display: flex;
    gap: 15px;
}

.dvnt-lienhe__social-link {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
    color: white;
}

.dvnt-lienhe__social-link--facebook {
    background: #1877f2;
}

.dvnt-lienhe__social-link--instagram {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.dvnt-lienhe__social-link--linkedin {
    background: #0077b5;
}

.dvnt-lienhe__social-link--youtube {
    background: #ff0000;
}

.dvnt-lienhe__social-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Form Styles */
.dvnt-lienhe__form-wrapper {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.dvnt-lienhe__form-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: #2d3748;
}

.dvnt-lienhe__form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.dvnt-lienhe__form-group {
    margin-bottom: 25px;
}

.dvnt-lienhe__form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: #2d3748;
}

.dvnt-lienhe__form-required {
    color: #e53e3e;
}

.dvnt-lienhe__form-input,
.dvnt-lienhe__form-select,
.dvnt-lienhe__form-textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f7fafc;
}

.dvnt-lienhe__form-input:focus,
.dvnt-lienhe__form-select:focus,
.dvnt-lienhe__form-textarea:focus {
    outline: none;
    border-color: #667eea;
    background-color: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.dvnt-lienhe__form-input.dvnt-lienhe__form-input--error,
.dvnt-lienhe__form-select.dvnt-lienhe__form-select--error,
.dvnt-lienhe__form-textarea.dvnt-lienhe__form-textarea--error {
    border-color: #e53e3e;
    background-color: #fed7d7;
}

.dvnt-lienhe__form-textarea {
    resize: vertical;
    min-height: 120px;
}

.dvnt-lienhe__form-error {
    display: block;
    color: #e53e3e;
    font-size: 0.875rem;
    margin-top: 5px;
    min-height: 20px;
}

/* Checkbox */
.dvnt-lienhe__form-checkbox {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
    color: #4a5568;
}

.dvnt-lienhe__form-checkbox input[type="checkbox"] {
    display: none;
}

.dvnt-lienhe__form-checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #e2e8f0;
    border-radius: 4px;
    margin-right: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.dvnt-lienhe__form-checkbox input[type="checkbox"]:checked + .dvnt-lienhe__form-checkmark {
    background-color: #667eea;
    border-color: #667eea;
}

.dvnt-lienhe__form-checkbox input[type="checkbox"]:checked + .dvnt-lienhe__form-checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.dvnt-lienhe__form-link {
    color: #667eea;
    text-decoration: none;
}

.dvnt-lienhe__form-link:hover {
    text-decoration: underline;
}

/* Submit Button */
.dvnt-lienhe__form-button {
    width: 100%;
    padding: 18px 30px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.dvnt-lienhe__form-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.dvnt-lienhe__form-button:active {
    transform: translateY(0);
}

.dvnt-lienhe__form-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.dvnt-lienhe__form-button-icon {
    transition: transform 0.3s ease;
}

.dvnt-lienhe__form-button:hover .dvnt-lienhe__form-button-icon {
    transform: translateX(3px);
}

/* Messages */
.dvnt-lienhe__message {
    display: none;
    padding: 15px 20px;
    border-radius: 12px;
    margin-top: 20px;
    align-items: center;
    gap: 10px;
}

.dvnt-lienhe__message--success {
    background-color: #c6f6d5;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.dvnt-lienhe__message--error {
    background-color: #fed7d7;
    color: #742a2a;
    border: 1px solid #feb2b2;
}

.dvnt-lienhe__message.dvnt-lienhe__message--show {
    display: flex;
}

/* Map Section */
.dvnt-lienhe__map {
    padding: 80px 0;
    background-color: white;
}

.dvnt-lienhe__map-title {
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #2d3748;
}

.dvnt-lienhe__map-wrapper {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.dvnt-lienhe__map-iframe {
    width: 100%;
    height: 400px;
    border: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .dvnt-lienhe__container {
        padding: 0 15px;
    }
    
    .dvnt-lienhe__title {
        font-size: 2rem;
    }
    
    .dvnt-lienhe__subtitle {
        font-size: 1rem;
    }
    
    .dvnt-lienhe__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .dvnt-lienhe__info,
    .dvnt-lienhe__form-wrapper {
        padding: 30px 20px;
    }
    
    .dvnt-lienhe__form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .dvnt-lienhe__info-item {
        padding: 15px;
    }
    
    .dvnt-lienhe__social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .dvnt-lienhe__header {
        padding: 60px 0;
    }
    
    .dvnt-lienhe__content,
    .dvnt-lienhe__map {
        padding: 60px 0;
    }
    
    .dvnt-lienhe__title {
        font-size: 1.75rem;
    }
    
    .dvnt-lienhe__info-title,
    .dvnt-lienhe__form-title,
    .dvnt-lienhe__map-title {
        font-size: 1.5rem;
    }
    
    .dvnt-lienhe__form-button {
        padding: 15px 25px;
        font-size: 1rem;
    }
}

/* Loading Animation */
.dvnt-lienhe__loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus Styles for Accessibility */
.dvnt-lienhe__form-input:focus,
.dvnt-lienhe__form-select:focus,
.dvnt-lienhe__form-textarea:focus,
.dvnt-lienhe__form-button:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}
/* ===================================thaydoitenanh.html=================== */
.doitenhinhanh__body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: #2d3748;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }

        .doitenhinhanh__container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .doitenhinhanh__header {
            background: rgba(255, 255, 255, 0.95);
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
            background-attachment: fixed;
            backdrop-filter: blur(10px);
            padding: 2rem 0;
            text-align: center;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            margin-top: 60px;
        }

        .doitenhinhanh__title {
            font-size: 2.5rem;
            font-weight: 700;
            color: #2d3748;
            color: #ffffffff;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
        }

        .doitenhinhanh__title-icon {
            font-size: 2.5rem;
        }

        .doitenhinhanh__subtitle {
            font-size: 1.1rem;
            color: #718096;
            font-weight: 400;
        }

        /* Main Content */
        .doitenhinhanh__main {
            padding: 3rem 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
            background-attachment: fixed;
        }

        /* Upload Section */
        .doitenhinhanh__upload-section {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        }

        .doitenhinhanh__upload-area {
            border: 3px dashed #cbd5e0;
            border-radius: 12px;
            padding: 3rem 2rem;
            text-align: center;
            transition: all 0.3s ease;
            cursor: pointer;
            position: relative;
            background: #f7fafc;
        }

        .doitenhinhanh__upload-area:hover,
        .doitenhinhanh__upload-area--dragover {
            border-color: #667eea;
            background: #edf2f7;
            transform: translateY(-2px);
        }

        .doitenhinhanh__upload-content {
            pointer-events: none;
        }

        .doitenhinhanh__upload-icon {
            font-size: 4rem;
            margin-bottom: 1rem;
        }

        .doitenhinhanh__upload-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 0.5rem;
        }

        .doitenhinhanh__upload-description {
            color: #718096;
            margin-bottom: 1.5rem;
        }

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

        .doitenhinhanh__upload-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            pointer-events: auto;
        }

        .doitenhinhanh__upload-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
        }

        .doitenhinhanh__upload-info {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #e2e8f0;
        }

        .doitenhinhanh__info-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .doitenhinhanh__info-label {
            font-weight: 500;
            color: #4a5568;
        }

        .doitenhinhanh__info-value {
            color: #718096;
        }

        /* Settings Section */
        .doitenhinhanh__settings-section {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        }

        .doitenhinhanh__section-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 1.5rem;
        }

        .doitenhinhanh__settings-simple {
            max-width: 600px;
            margin: 0 auto 2rem;
        }

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

        .doitenhinhanh__setting-label {
            font-weight: 500;
            color: #4a5568;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.5rem;
        }

        .doitenhinhanh__setting-input {
            width: 100%;
            padding: 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        .doitenhinhanh__setting-input:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .doitenhinhanh__setting-note {
            font-size: 0.9rem;
            color: #718096;
            margin-top: 0.5rem;
            font-style: italic;
        }

        .doitenhinhanh__setting-checkbox {
            width: 18px;
            height: 18px;
            accent-color: #667eea;
        }

        .doitenhinhanh__apply-btn {
            width: 100%;
            max-width: 300px;
            margin: 0 auto;
            display: block;
            background: #48bb78;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .doitenhinhanh__apply-btn:hover {
            background: #38a169;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(72, 187, 120, 0.3);
        }

        /* Preview Section */
        .doitenhinhanh__preview-section {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        }

        .doitenhinhanh__section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .doitenhinhanh__section-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .doitenhinhanh__file-count {
            background: #edf2f7;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 500;
            color: #4a5568;
        }

        /* Control Buttons */
        .doitenhinhanh__control-buttons {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .doitenhinhanh__refresh-btn,
        .doitenhinhanh__select-all-btn,
        .doitenhinhanh__delete-selected-btn {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .doitenhinhanh__refresh-btn {
            background: #4299e1;
            color: white;
        }

        .doitenhinhanh__refresh-btn:hover {
            background: #3182ce;
        }

        .doitenhinhanh__select-all-btn {
            background: #805ad5;
            color: white;
        }

        .doitenhinhanh__select-all-btn:hover {
            background: #6b46c1;
        }

        .doitenhinhanh__delete-selected-btn {
            background: #e53e3e;
            color: white;
        }

        .doitenhinhanh__delete-selected-btn:hover {
            background: #c53030;
        }

        /* Download Buttons */
        .doitenhinhanh__download-buttons {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .doitenhinhanh__download-batch-btn,
        .doitenhinhanh__download-zip-btn {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 140px;
            justify-content: center;
        }

        .doitenhinhanh__download-batch-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .doitenhinhanh__download-batch-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
        }

        .doitenhinhanh__download-zip-btn {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            color: white;
        }

        .doitenhinhanh__download-zip-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(245, 87, 108, 0.3);
        }

        .doitenhinhanh__download-batch-btn:disabled,
        .doitenhinhanh__download-zip-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .doitenhinhanh__btn-icon {
            font-size: 1.1rem;
        }

        .doitenhinhanh__preview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .doitenhinhanh__preview-item {
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            position: relative;
        }

        .doitenhinhanh__preview-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        }

        .doitenhinhanh__preview-item--selected {
            border-color: #667eea;
            box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
        }

        .doitenhinhanh__preview-checkbox {
            position: absolute;
            top: 10px;
            left: 10px;
            width: 20px;
            height: 20px;
            z-index: 10;
            accent-color: #667eea;
        }

        .doitenhinhanh__preview-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: #f7fafc;
        }

        .doitenhinhanh__preview-info {
            padding: 1rem;
        }

        .doitenhinhanh__preview-names {
            margin-bottom: 1rem;
        }

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

        .doitenhinhanh__name-label {
            font-weight: 500;
            color: #4a5568;
            min-width: 80px;
        }

        .doitenhinhanh__name-value {
            color: #2d3748;
            word-break: break-all;
            flex: 1;
        }

        .doitenhinhanh__name-value--new {
            color: #48bb78;
            font-weight: 500;
        }

        .doitenhinhanh__preview-actions {
            display: flex;
            gap: 0.5rem;
        }

        .doitenhinhanh__download-btn {
            flex: 1;
            background: #667eea;
            color: white;
            border: none;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        .doitenhinhanh__download-btn:hover {
            background: #5a67d8;
        }

        .doitenhinhanh__remove-btn {
            background: #e53e3e;
            color: white;
            border: none;
            padding: 0.5rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        .doitenhinhanh__remove-btn:hover {
            background: #c53030;
        }

        /* Load More Button */
        .doitenhinhanh__load-more-container {
            text-align: center;
            margin-top: 2rem;
        }

        .doitenhinhanh__load-more-btn {
            background: linear-gradient(135deg, #38b2ac 0%, #319795 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin: 0 auto;
        }

        .doitenhinhanh__load-more-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(56, 178, 172, 0.3);
        }

        /* Footer */
        .doitenhinhanh__footer {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 2rem 0;
            text-align: center;
            margin-top: 3rem;
        }

        .doitenhinhanh__footer-text {
            color: #718096;
        }

        /* Loading state */
        .doitenhinhanh__btn-loading {
            position: relative;
            overflow: hidden;
        }

        .doitenhinhanh__btn-loading::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            animation: btnLoading 1.5s infinite;
        }

        @keyframes btnLoading {
            0% { left: -100%; }
            100% { left: 100%; }
        }

        /* Animation Classes */
        .doitenhinhanh__fade-in {
            animation: fadeIn 0.5s ease-in-out;
        }

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

        /* Responsive Design */
        @media (max-width: 768px) {
            .doitenhinhanh__container {
                padding: 0 15px;
            }
            
            .doitenhinhanh__title {
                font-size: 2rem;
                flex-direction: column;
                gap: 0.5rem;
            }
            
            .doitenhinhanh__upload-area {
                padding: 2rem 1rem;
            }
            
            .doitenhinhanh__section-header {
                flex-direction: column;
                align-items: stretch;
            }
            
            .doitenhinhanh__section-actions {
                justify-content: center;
                flex-direction: column;
                gap: 1rem;
            }
            
            .doitenhinhanh__control-buttons,
            .doitenhinhanh__download-buttons {
                justify-content: center;
            }
            
            .doitenhinhanh__preview-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .doitenhinhanh__main {
                padding: 1.5rem 0;
            }
            
            .doitenhinhanh__upload-section,
            .doitenhinhanh__settings-section,
            .doitenhinhanh__preview-section {
                padding: 1.5rem;
                margin-bottom: 1.5rem;
            }
            
            .doitenhinhanh__upload-title {
                font-size: 1.2rem;
            }
            
            .doitenhinhanh__section-title {
                font-size: 1.3rem;
            }
            
            .doitenhinhanh__download-buttons {
                width: 100%;
                flex-direction: column;
            }
            
            .doitenhinhanh__download-batch-btn,
            .doitenhinhanh__download-zip-btn {
                width: 100%;
                min-width: auto;
            }
        }
 /* =======================================thaynen.html============================ */
 .dvnt-thaydoinen {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    position: relative;
}

.dvnt-thaydoinen__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles - Cải thiện */
.dvnt-thaydoinen__header {
    background: rgba(255, 255, 255, 0.95);
    Background: var(--mauxanhtoinen);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 2.5rem 0;
    text-align: center;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    /* position: sticky; */
    top: 0;
    z-index: 100;
    margin-top: 33px;
    margin-top: 80px;
}

.dvnt-thaydoinen__title {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea, #764ba2);
    background: linear-gradient(135deg, #ffffffff, #ffffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.8rem;
    text-shadow: none;
    letter-spacing: -0.5px;
}

.dvnt-thaydoinen__subtitle {
    font-size: 1.3rem;
    color: #6c757d;
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

/* Main Content */
.dvnt-thaydoinen__main {
    padding: 4rem 0;
    background: var( --mauxanhtoinen);
}

.dvnt-thaydoinen__section-title {
    font-size: 2rem;
    font-weight: 700;
    color: #5e3f7d;
    margin-bottom: 2rem;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    position: relative;
}

.dvnt-thaydoinen__section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, transparent, #fff, transparent);
    border-radius: 2px;
}

/* Upload Section - Cải thiện */
.dvnt-thaydoinen__upload-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__upload-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.dvnt-thaydoinen__upload-area {
    margin-top: 1.5rem;
}

.dvnt-thaydoinen__upload-zone {
    border: 3px dashed #667eea;
    border-radius: 20px;
    padding: 4rem 2rem;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    background: linear-gradient(135deg, #f8f9ff 0%, #fff 100%);
    overflow: hidden;
}

.dvnt-thaydoinen__upload-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s ease;
}

.dvnt-thaydoinen__upload-zone:hover::before {
    left: 100%;
}

.dvnt-thaydoinen__upload-zone:hover {
    border-color: #764ba2;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.25);
    background: linear-gradient(135deg, #f0f2ff 0%, #fff 100%);
}

.dvnt-thaydoinen__upload-zone--dragover {
    border-color: #28a745 !important;
    background: linear-gradient(135deg, #f0fff4 0%, #e8f5e8 100%) !important;
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(40, 167, 69, 0.2);
}

.dvnt-thaydoinen__upload-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.dvnt-thaydoinen__upload-text {
    font-size: 1.4rem;
    color: #495057;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.dvnt-thaydoinen__upload-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 1.2rem 3rem;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.dvnt-thaydoinen__upload-btn::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 ease;
}

.dvnt-thaydoinen__upload-btn:hover::before {
    left: 100%;
}

.dvnt-thaydoinen__upload-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

.dvnt-thaydoinen__upload-btn:active {
    transform: translateY(-1px);
}

.dvnt-thaydoinen__upload-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    z-index: 10;
}

.dvnt-thaydoinen__upload-note {
    font-size: 1rem;
    color: #6c757d;
    margin-top: 1.5rem;
    line-height: 1.6;
    font-style: italic;
}

/* File Info - Cải thiện */
.dvnt-thaydoinen__file-info {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f0ff 100%);
    border-radius: 16px;
    padding: 1.5rem;
    margin: 2rem 0;
    font-size: 0.95rem;
    color: #495057;
    border-left: 5px solid #667eea;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__file-info:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.15);
}

/* Statistics Section - KHẮC PHỤC */
.dvnt-thaydoinen__stats-section {
    background: linear-gradient(135deg, #e8f5e8 0%, #f0fff4 100%);
    border-radius: 20px;
    padding: 2rem;
    margin-top: 2rem;
    border: 2px solid #28a745;
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.1);
    display: none; /* Hidden by default */
}

.dvnt-thaydoinen__stats-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #28a745;
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.dvnt-thaydoinen__stat-item {
    background: rgba(255, 255, 255, 0.8);
    padding: 1.2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__stat-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.dvnt-thaydoinen__stat-label {
    display: block;
    font-size: 0.9rem;
    color: #6c757d;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dvnt-thaydoinen__stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: #28a745;
    text-shadow: 0 2px 4px rgba(40, 167, 69, 0.2);
}

/* Background Section - Cải thiện */
.dvnt-thaydoinen__background-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__background-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.dvnt-thaydoinen__background-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.dvnt-thaydoinen__tab {
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
    padding: 1rem 2rem;
    border-radius: 30px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}

.dvnt-thaydoinen__tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    transition: left 0.3s ease;
    z-index: -1;
}

.dvnt-thaydoinen__tab--active::before,
.dvnt-thaydoinen__tab:hover::before {
    left: 0;
}

.dvnt-thaydoinen__tab--active,
.dvnt-thaydoinen__tab:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.dvnt-thaydoinen__background-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 1.5rem;
    max-width: 700px;
    margin: 0 auto;
}

.dvnt-thaydoinen__background-item {
    width: 90px;
    height: 90px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.4s ease;
    border: 3px solid transparent;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.dvnt-thaydoinen__background-item::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__background-item:hover::after {
    width: 100%;
    height: 100%;
    border-radius: 20px;
}

.dvnt-thaydoinen__background-item:hover {
    transform: scale(1.15) rotate(5deg);
    border-color: #667eea;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.dvnt-thaydoinen__background-item--active {
    border-color: #28a745 !important;
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.4) !important;
}

.dvnt-thaydoinen__background-item--active::before {
    content: '✓';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 25px;
    height: 25px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 12px;
    z-index: 10;
}

.dvnt-thaydoinen__background-item--upload {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f0ff 100%) !important;
    color: #667eea;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px dashed #667eea;
    font-size: 1.5rem;
}

.dvnt-thaydoinen__background-item--upload:hover {
    background: linear-gradient(135deg, #e8f0ff 0%, #d0e0ff 100%) !important;
    border-color: #764ba2;
}

/* Preview Section - Cải thiện */
.dvnt-thaydoinen__preview-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__preview-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.dvnt-thaydoinen__preview-area {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.dvnt-thaydoinen__preview-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 20px;
    padding: 2.5rem;
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed #dee2e6;
    overflow: hidden;
    position: relative;
}

.dvnt-thaydoinen__preview-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%),
        linear-gradient(-45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
    background-size: 20px 20px;
    opacity: 0.5;
}

.dvnt-thaydoinen__preview-container canvas {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    z-index: 10;
    position: relative;
}

.dvnt-thaydoinen__preview-container canvas:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.dvnt-thaydoinen__preview-placeholder {
    text-align: center;
    z-index: 10;
    position: relative;
}

.dvnt-thaydoinen__preview-text {
    color: #6c757d;
    font-size: 1.2rem;
    font-weight: 500;
}

.dvnt-thaydoinen__controls {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f0ff 100%);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.dvnt-thaydoinen__control-group {
    margin-bottom: 2rem;
}

.dvnt-thaydoinen__control-label {
    display: block;
    font-weight: 700;
    color: #495057;
    margin-bottom: 0.8rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dvnt-thaydoinen__control-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, #dee2e6, #adb5bd);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__control-slider:hover {
    background: linear-gradient(90deg, #adb5bd, #6c757d);
}

.dvnt-thaydoinen__control-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__control-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.6);
}

.dvnt-thaydoinen__control-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__control-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.6);
}

.dvnt-thaydoinen__control-value {
    font-size: 1rem;
    color: #667eea;
    font-weight: 700;
    margin-left: 1rem;
    background: rgba(102, 126, 234, 0.1);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    display: inline-block;
}

/* Buttons - KHẮC PHỤC */
.dvnt-thaydoinen__reset-btn,
.dvnt-thaydoinen__prev-btn,
.dvnt-thaydoinen__next-btn,
.dvnt-thaydoinen__undo-btn,
.dvnt-thaydoinen__redo-btn,
.dvnt-thaydoinen__comparison-btn {
    background: linear-gradient(135deg, #6c757d, #495057);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dvnt-thaydoinen__reset-btn:hover,
.dvnt-thaydoinen__prev-btn:hover,
.dvnt-thaydoinen__next-btn:hover,
.dvnt-thaydoinen__undo-btn:hover,
.dvnt-thaydoinen__redo-btn:hover,
.dvnt-thaydoinen__comparison-btn:hover {
    background: linear-gradient(135deg, #495057, #343a40);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(108, 117, 125, 0.4);
}

/* History Controls - KHẮC PHỤC */
.dvnt-thaydoinen__history-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.dvnt-thaydoinen__undo-btn,
.dvnt-thaydoinen__redo-btn {
    background: linear-gradient(135deg, #17a2b8, #138496);
    flex: 1;
    margin-bottom: 0;
}

.dvnt-thaydoinen__undo-btn:hover,
.dvnt-thaydoinen__redo-btn:hover {
    background: linear-gradient(135deg, #138496, #117a8b);
}

.dvnt-thaydoinen__btn--disabled {
    background: #dee2e6 !important;
    color: #6c757d !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
}

/* Keyboard Shortcuts Info - KHẮC PHỤC */
.dvnt-thaydoinen__shortcuts-info {
    background: rgba(102, 126, 234, 0.05);
    border-radius: 15px;
    padding: 1rem;
    margin-top: 1rem;
}

.dvnt-thaydoinen__shortcuts-info details {
    cursor: pointer;
}

.dvnt-thaydoinen__shortcuts-info summary {
    font-weight: 600;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.dvnt-thaydoinen__shortcuts-info ul {
    list-style: none;
    padding-left: 0;
}

.dvnt-thaydoinen__shortcuts-info li {
    padding: 0.3rem 0;
    color: #495057;
}

.dvnt-thaydoinen__shortcuts-info kbd {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
    color: #495057;
    margin-right: 0.5rem;
}

/* Download Section - Cải thiện */
.dvnt-thaydoinen__download-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__download-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.dvnt-thaydoinen__download-options {
    text-align: center;
}

/* Format Selection - KHẮC PHỤC */
.dvnt-thaydoinen__format-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.dvnt-thaydoinen__format-option {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    padding: 1.2rem;
    border-radius: 15px;
    transition: all 0.3s ease;
    background: rgba(102, 126, 234, 0.05);
    border: 2px solid transparent;
}

.dvnt-thaydoinen__format-option:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
}

.dvnt-thaydoinen__format-input {
    width: 24px;
    height: 24px;
    accent-color: #667eea;
    cursor: pointer;
}

.dvnt-thaydoinen__format-input:checked + .dvnt-thaydoinen__format-label {
    color: #667eea;
    font-weight: 700;
}

.dvnt-thaydoinen__format-option:has(.dvnt-thaydoinen__format-input:checked) {
    background: rgba(102, 126, 234, 0.15);
    border-color: #667eea;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* Quality Selection - KHẮC PHỤC */
.dvnt-thaydoinen__quality-selection {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f0ff 100%);
    border-radius: 15px;
    border: 2px solid #667eea;
}

.dvnt-thaydoinen__quality-label {
    font-weight: 700;
    color: #495057;
    font-size: 1.1rem;
}

.dvnt-thaydoinen__quality-slider {
    flex: 1;
    max-width: 300px;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, #dc3545, #ffc107, #28a745);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.dvnt-thaydoinen__quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__quality-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.6);
}

.dvnt-thaydoinen__quality-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    min-width: 60px;
    text-align: center;
}

.dvnt-thaydoinen__download-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.dvnt-thaydoinen__download-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 1.5rem 3rem;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.dvnt-thaydoinen__download-btn::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 ease;
}

.dvnt-thaydoinen__download-btn:hover:not(:disabled)::before {
    left: 100%;
}

.dvnt-thaydoinen__download-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
}

.dvnt-thaydoinen__download-btn--disabled {
    background: linear-gradient(135deg, #dee2e6, #adb5bd);
    color: #6c757d;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.dvnt-thaydoinen__download-all-btn {
    background: linear-gradient(135deg, #28a745, #20c997);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.dvnt-thaydoinen__download-all-btn:hover:not(:disabled) {
    box-shadow: 0 10px 30px rgba(40, 167, 69, 0.5);
}

/* Progress Bar - KHẮC PHỤC */
.dvnt-thaydoinen__progress-container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    min-width: 400px;
    text-align: center;
}

.dvnt-thaydoinen__progress-bar {
    width: 100%;
    height: 12px;
    background: #e9ecef;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.dvnt-thaydoinen__progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 6px;
    transition: width 0.3s ease;
    position: relative;
}

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

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

.dvnt-thaydoinen__progress-text {
    font-weight: 600;
    color: #495057;
    font-size: 1.1rem;
}

/* Comparison View - KHẮC PHỤC */
.dvnt-thaydoinen__comparison-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dvnt-thaydoinen__comparison-content {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
}

.dvnt-thaydoinen__comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
}

.dvnt-thaydoinen__comparison-header h3 {
    color: #495057;
    font-size: 1.5rem;
}

.dvnt-thaydoinen__comparison-close {
    background: #dc3545;
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__comparison-close:hover {
    background: #c82333;
    transform: scale(1.1);
}

.dvnt-thaydoinen__comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.dvnt-thaydoinen__comparison-item {
    text-align: center;
}

.dvnt-thaydoinen__comparison-item h4 {
    margin-bottom: 1rem;
    color: #495057;
    font-size: 1.2rem;
}

.dvnt-thaydoinen__comparison-canvas {
    border: 2px solid #dee2e6;
    border-radius: 10px;
    max-width: 100%;
    height: auto;
}

/* Restore Dialog - KHẮC PHỤC */
.dvnt-thaydoinen__restore-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dvnt-thaydoinen__restore-content {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.dvnt-thaydoinen__restore-content h3 {
    color: #495057;
    margin-bottom: 1rem;
}

.dvnt-thaydoinen__restore-content p {
    color: #6c757d;
    margin-bottom: 1rem;
}

.dvnt-thaydoinen__restore-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.dvnt-thaydoinen__restore-btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dvnt-thaydoinen__restore-btn[data-action="restore"] {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
}

.dvnt-thaydoinen__restore-btn[data-action="dismiss"] {
    background: #6c757d;
    color: white;
}

.dvnt-thaydoinen__restore-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Footer - Cải thiện */
.dvnt-thaydoinen__footer {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.8));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: white;
    text-align: center;
    padding: 3rem 0;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.dvnt-thaydoinen__footer-text {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 500;
}

/* Notifications - Cải thiện */
.dvnt-thaydoinen__notification {
    position: fixed;
    top: 30px;
    right: 30px;
    padding: 1.2rem 2rem;
    border-radius: 15px;
    color: white;
    font-weight: 600;
    z-index: 1000;
    transform: translateX(100%);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 300px;
}

.dvnt-thaydoinen__notification--success {
    background: linear-gradient(135deg, #28a745, #20c997);
}

.dvnt-thaydoinen__notification--error {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.dvnt-thaydoinen__notification--warning {
    background: linear-gradient(135deg, #ffc107, #e0a800);
    color: #212529;
}

.dvnt-thaydoinen__notification--info {
    background: linear-gradient(135deg, #17a2b8, #138496);
}

/* Responsive Design - Cải thiện */
@media (max-width: 1024px) {
    .dvnt-thaydoinen__container {
        padding: 0 15px;
    }
    
    .dvnt-thaydoinen__preview-area {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .dvnt-thaydoinen__title {
        font-size: 2.2rem;
    }
    
    .dvnt-thaydoinen__subtitle {
        font-size: 1.1rem;
    }
    
    .dvnt-thaydoinen__section-title {
        font-size: 1.6rem;
    }
    
    .dvnt-thaydoinen__upload-section,
    .dvnt-thaydoinen__background-section,
    .dvnt-thaydoinen__preview-section,
    .dvnt-thaydoinen__download-section {
        padding: 2rem;
        margin-bottom: 2rem;
    }
    
    .dvnt-thaydoinen__background-tabs {
        gap: 0.5rem;
    }
    
    .dvnt-thaydoinen__tab {
        padding: 0.8rem 1.5rem;
        font-size: 0.8rem;
    }
    
    .dvnt-thaydoinen__format-selection {
        grid-template-columns: 1fr;
    }
    
    .dvnt-thaydoinen__upload-zone {
        padding: 3rem 1.5rem;
    }
    
    .dvnt-thaydoinen__background-grid {
        grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
        gap: 1rem;
    }
    
    .dvnt-thaydoinen__background-item {
        width: 70px;
        height: 70px;
    }
    
    .dvnt-thaydoinen__download-actions {
        flex-direction: column;
        gap: 1rem;
    }
    
    .dvnt-thaydoinen__notification {
        right: 15px;
        left: 15px;
        min-width: auto;
    }
    
    .dvnt-thaydoinen__stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .dvnt-thaydoinen__stat-value {
        font-size: 1.4rem;
    }
    
    .dvnt-thaydoinen__quality-selection {
        flex-direction: column;
        gap: 1rem;
    }
    
    .dvnt-thaydoinen__comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .dvnt-thaydoinen__progress-container {
        min-width: 300px;
        padding: 1.5rem;
    }
    
    .dvnt-thaydoinen__restore-content {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .dvnt-thaydoinen__restore-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .dvnt-thaydoinen__title {
        font-size: 1.8rem;
    }
    
    .dvnt-thaydoinen__section-title {
        font-size: 1.4rem;
    }
    
    .dvnt-thaydoinen__upload-btn,
    .dvnt-thaydoinen__download-btn {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    
    .dvnt-thaydoinen__main {
        padding: 2rem 0;
    }
    
    .dvnt-thaydoinen__upload-section,
    .dvnt-thaydoinen__background-section,
    .dvnt-thaydoinen__preview-section,
    .dvnt-thaydoinen__download-section {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
        border-radius: 16px;
    }
    
    .dvnt-thaydoinen__upload-zone {
        padding: 2rem 1rem;
    }
    
    .dvnt-thaydoinen__background-grid {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    }
    
    .dvnt-thaydoinen__background-item {
        width: 60px;
        height: 60px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .dvnt-thaydoinen__preview-container {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
        border-color: #495057;
    }
    
    .dvnt-thaydoinen__preview-text {
        color: #adb5bd;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .dvnt-thaydoinen__upload-zone {
        border-width: 4px;
    }
    
    .dvnt-thaydoinen__background-item {
        border-width: 4px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .dvnt-thaydoinen__upload-icon {
        animation: none;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .dvnt-thaydoinen__upload-btn,
    .dvnt-thaydoinen__download-btn,
    .dvnt-thaydoinen__tab {
        min-height: 44px;
    }
    
    .dvnt-thaydoinen__control-slider::-webkit-slider-thumb {
        width: 30px;
        height: 30px;
    }
    
    .dvnt-thaydoinen__background-item {
        min-width: 60px;
        min-height: 60px;
    }
}

/* Print styles */
@media print {
    .dvnt-thaydoinen {
        background: white;
        color: black;
    }
    
    .dvnt-thaydoinen__header,
    .dvnt-thaydoinen__footer {
        background: white;
        color: black;
    }
    
    .dvnt-thaydoinen__upload-section,
    .dvnt-thaydoinen__background-section,
    .dvnt-thaydoinen__preview-section,
    .dvnt-thaydoinen__download-section {
        background: white;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ============================================================================================footer.html=================== */
/* Base Footer Styles */
.dvnt-footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #ffffff;
  padding: 60px 0 0;
  position: relative;
  overflow: hidden;
}

.dvnt-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #4a90e2, transparent);
}

.dvnt-footer__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Main Footer Content */
.dvnt-footer__main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.dvnt-footer__section {
  padding: 0;
}

.dvnt-footer__section--company {
  grid-column: span 1;
}

/* Logo Section */
.dvnt-footer__logo {
  margin-bottom: 20px;
}

.dvnt-footer__logo-image {
  max-height: 50px;
  width: auto;
}

.dvnt-footer__description {
  color: #b8c5d6;
  line-height: 1.6;
  margin-bottom: 30px;
  font-size: 14px;
}

/* Headings */
.dvnt-footer__heading {
  color: #ffffff;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.dvnt-footer__heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: #4a90e2;
}

/* Social Media */
.dvnt-footer__social-title {
  font-size: 16px;
  margin-bottom: 15px;
  color: #ffffff;
}

.dvnt-footer__social-links {
  display: flex;
  gap: 15px;
}

.dvnt-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: #ffffff;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.dvnt-footer__social-link:hover {
  background: #4a90e2;
  transform: translateY(-2px);
}

.dvnt-footer__social-icon {
  font-size: 18px;
}

/* Navigation Lists */
.dvnt-footer__nav-list,
.dvnt-footer__service-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.dvnt-footer__nav-item,
.dvnt-footer__service-item {
  margin-bottom: 12px;
}

.dvnt-footer__nav-link,
.dvnt-footer__service-link {
  color: #b8c5d6;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
  display: inline-block;
  position: relative;
}

.dvnt-footer__nav-link:hover,
.dvnt-footer__service-link:hover {
  color: #4a90e2;
  padding-left: 5px;
}

/* Contact Section */
.dvnt-footer__contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 15px;
  gap: 12px;
}

.dvnt-footer__contact-icon {
  color: #4a90e2;
  font-size: 16px;
  margin-top: 2px;
  flex-shrink: 0;
}

.dvnt-footer__contact-text,
.dvnt-footer__contact-link {
  color: #b8c5d6;
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  font-style: normal;
}

.dvnt-footer__contact-link:hover {
  color: #4a90e2;
}

/* Newsletter Section */
.dvnt-footer__newsletter {
  background: rgba(255, 255, 255, 0.05);
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 40px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.dvnt-footer__newsletter-title {
  color: #ffffff;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}

.dvnt-footer__newsletter-description {
  color: #b8c5d6;
  margin-bottom: 20px;
  font-size: 14px;
}

.dvnt-footer__newsletter-input-group {
  display: flex;
  gap: 10px;
  max-width: 400px;
}

.dvnt-footer__newsletter-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 14px;
  backdrop-filter: blur(10px);
}

.dvnt-footer__newsletter-input::placeholder {
  color: #b8c5d6;
}

.dvnt-footer__newsletter-input:focus {
  outline: none;
  border-color: #4a90e2;
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.dvnt-footer__newsletter-button {
  padding: 12px 24px;
  background: #4a90e2;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.3s ease;
  white-space: nowrap;
}

.dvnt-footer__newsletter-button:hover {
  background: #357abd;
}

/* Bottom Section */
.dvnt-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 30px 0;
}

.dvnt-footer__bottom-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.dvnt-footer__copyright-text {
  color: #b8c5d6;
  font-size: 14px;
  margin: 0;
}

.dvnt-footer__legal-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.dvnt-footer__legal-link {
  color: #b8c5d6;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

.dvnt-footer__legal-link:hover {
  color: #4a90e2;
}

/* Responsive Design */
@media (max-width: 768px) {
  .dvnt-footer {
    padding: 40px 0 0;
  }
  
  .dvnt-footer__main {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .dvnt-footer__newsletter {
    padding: 20px;
  }
  
  .dvnt-footer__newsletter-input-group {
    flex-direction: column;
    max-width: none;
  }
  
  .dvnt-footer__newsletter-input,
  .dvnt-footer__newsletter-button {
    width: 100%;
  }
  
  .dvnt-footer__bottom-content {
    flex-direction: column;
    text-align: center;
  }
  
  .dvnt-footer__legal-nav {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .dvnt-footer__container {
    padding: 0 15px;
  }
  
  .dvnt-footer__social-links {
    justify-content: center;
  }
  
  .dvnt-footer__legal-nav {
    flex-direction: column;
    gap: 10px;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  .dvnt-footer__social-link,
  .dvnt-footer__nav-link,
  .dvnt-footer__service-link,
  .dvnt-footer__newsletter-button {
    transition: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .dvnt-footer {
    background: #000000;
    color: #ffffff;
  }
  
  .dvnt-footer__description,
  .dvnt-footer__nav-link,
  .dvnt-footer__service-link,
  .dvnt-footer__contact-text,
  .dvnt-footer__contact-link,
  .dvnt-footer__copyright-text,
  .dvnt-footer__legal-link {
    color: #ffffff;
  }
  
  .dvnt-footer__newsletter {
    background: #333333;
    border-color: #666666;
  }
}


/* =========================================taianhbanglinkhangloay.html================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        

        .container {
            max-width: 1000px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
            background-attachment: fixed;
            color: white;
            padding: 40px 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }

        .header-content {
            position: relative;
            z-index: 2;
        }

        .header h1 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 15px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
            letter-spacing: -0.02em;
        }

        .header p {
            opacity: 0.95;
            font-size: 1.2rem;
            font-weight: 400;
            margin-bottom: 20px;
        }

        .header-stats {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            opacity: 0.9;
        }

        .stat-number {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .content {
            padding: 40px;
        }

        .section {
            margin-bottom: 35px;
            padding: 25px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .section-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .section-icon {
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 14px;
        }

        textarea {
            width: 100%;
            min-height: 140px;
            padding: 20px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 15px;
            font-family: 'Inter', sans-serif;
            resize: vertical;
            transition: all 0.3s ease;
            background: #fafafa;
        }

        textarea:focus {
            outline: none;
            border-color: #667eea;
            background: white;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .format-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 15px;
        }

        .format-option {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 20px 15px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            background: #fafafa;
            position: relative;
            overflow: hidden;
        }

        .format-option:hover {
            border-color: #667eea;
            background: #f7f9ff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
        }

        .format-option.selected {
            border-color: #667eea;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
        }

        .format-option input[type="radio"] {
            display: none;
        }

        .format-emoji {
            font-size: 24px;
            margin-bottom: 5px;
        }

        .format-label {
            font-weight: 600;
            font-size: 14px;
        }

        .format-desc {
            font-size: 12px;
            opacity: 0.8;
            line-height: 1.3;
        }

        .image-counter {
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            border: 2px solid #e2e8f0;
            padding: 15px 20px;
            border-radius: 12px;
            text-align: center;
            font-weight: 600;
            color: #2d3748;
            margin-top: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .counter-icon {
            width: 20px;
            height: 20px;
            background: #667eea;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 12px;
        }

        .action-buttons {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            margin-top: 20px;
        }

        .btn {
            padding: 15px 25px;
            border: none;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-family: 'Inter', sans-serif;
            text-decoration: none;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            transition: all 0.3s ease;
            transform: translate(-50%, -50%);
        }

        .btn:hover::before {
            width: 300px;
            height: 300px;
        }

        .btn-preview {
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(66, 153, 225, 0.3);
        }

        .btn-preview:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(66, 153, 225, 0.4);
        }

        .btn-download-single {
            background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(72, 187, 120, 0.3);
        }

        .btn-download-single:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(72, 187, 120, 0.4);
        }

        .btn-download-zip {
            background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(237, 137, 54, 0.3);
            display: none;
        }

        .btn-download-zip:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(237, 137, 54, 0.4);
        }

        .btn-clear {
            background: linear-gradient(135deg, #a0aec0 0%, #718096 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(160, 174, 192, 0.3);
        }

        .btn-clear:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(160, 174, 192, 0.4);
        }

        .btn-disabled {
            background: #e2e8f0;
            color: #a0aec0;
            cursor: not-allowed;
            box-shadow: none;
        }

        .btn-disabled:hover {
            transform: none;
            box-shadow: none;
        }

        .btn-disabled::before {
            display: none;
        }

        .btn-icon {
            font-size: 18px;
        }

        .progress-container {
            margin-top: 25px;
            display: none;
            background: white;
            padding: 20px;
            border-radius: 12px;
            border: 2px solid #e2e8f0;
        }

        .progress-bar {
            width: 100%;
            height: 12px;
            background: #e2e8f0;
            border-radius: 6px;
            overflow: hidden;
            position: relative;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            width: 0%;
            transition: width 0.3s ease;
            position: relative;
        }

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

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

        .progress-text {
            text-align: center;
            margin-top: 15px;
            font-weight: 600;
            color: #2d3748;
            font-size: 15px;
        }

        .status {
            margin-top: 25px;
            padding: 20px;
            border-radius: 12px;
            display: none;
            font-weight: 500;
            position: relative;
            overflow: hidden;
        }

        .status::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
        }

        .status.success {
            background: linear-gradient(135deg, #f0fff4 0%, #e6fffa 100%);
            border: 1px solid #9ae6b4;
            color: #2f855a;
        }

        .status.success::before {
            background: #48bb78;
        }

        .status.error {
            background: linear-gradient(135deg, #fff5f5 0%, #fed7d7 100%);
            border: 1px solid #feb2b2;
            color: #c53030;
        }

        .status.error::before {
            background: #e53e3e;
        }

        .status.warning {
            background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
            border: 1px solid #fbbf24;
            color: #92400e;
        }

        .status.warning::before {
            background: #f59e0b;
        }

        .preview-container {
            margin-top: 25px;
            display: none;
        }

        .preview-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .image-preview {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 20px;
        }

        .preview-item {
            background: white;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .preview-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            border-color: #667eea;
        }

        .preview-item img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .preview-item:hover img {
            transform: scale(1.05);
        }

        .preview-info {
            padding: 15px;
            background: #fafafa;
        }

        .preview-filename {
            font-weight: 600;
            color: #2d3748;
            font-size: 13px;
            margin-bottom: 8px;
            word-break: break-all;
        }

        .preview-size {
            font-size: 12px;
            color: #718096;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .preview-status {
            font-size: 11px;
            padding: 2px 6px;
            border-radius: 4px;
            margin-top: 5px;
            display: inline-block;
        }

        .preview-status.success {
            background: #d4edda;
            color: #155724;
        }

        .preview-status.error {
            background: #f8d7da;
            color: #721c24;
        }

        .loading {
            display: inline-block;
            width: 24px;
            height: 24px;
            border: 3px solid #f3f4f6;
            border-top: 3px solid #667eea;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

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

        .features {
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            margin: 20px 0;
            padding: 25px;
            border-radius: 15px;
            border: 1px solid #e2e8f0;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #4a5568;
        }

        .feature-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 16px;
            font-weight: 600;
        }

        .error-report {
            background: #fff8f8;
            border: 1px solid #fed7d7;
            border-radius: 8px;
            padding: 15px;
            margin-top: 15px;
            display: none;
        }

        .error-title {
            font-weight: 600;
            color: #c53030;
            margin-bottom: 10px;
        }

        .error-list {
            font-size: 14px;
            color: #744210;
        }

        .error-list li {
            margin-bottom: 5px;
            word-break: break-all;
        }

        .retry-section {
            background: #f7fafc;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            padding: 15px;
            margin-top: 15px;
            display: none;
        }

        .retry-title {
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 10px;
        }

        .retry-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .retry-item {
            background: #e2e8f0;
            color: #4a5568;
            padding: 5px 10px;
            border-radius: 6px;
            font-size: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .retry-item:hover {
            background: #cbd5e0;
        }

        @media (max-width: 768px) {
            body {
                padding: 10px;
            }
            
            .header h1 {
                font-size: 2.2rem;
            }
            
            .content {
                padding: 25px;
            }
            
            .section {
                padding: 20px;
            }
            
            .header-stats {
                gap: 20px;
            }
            
            .action-buttons {
                grid-template-columns: 1fr;
            }
            
            .format-grid {
                grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .header {
                padding: 30px 20px;
            }
            
            .header h1 {
                font-size: 1.8rem;
            }
            
            .content {
                padding: 20px;
            }
            
            .section {
                padding: 15px;
            }
        }