/* Modern Minimalist Design System */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;

    /* Status Colors */
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --error-color: #e74c3c;
    --info-color: #3498db;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-muted: #95a5a6;
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ecf0f1;
    --surface-color: #ffffff;
    --border-color: #ddd;
    --border-focus: #3498db;
    --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.2);

    /* RGB values for rgba usage */
    --primary-color-rgb: 52, 152, 219;
    --success-color-rgb: 46, 204, 113;
    --warning-color-rgb: 243, 156, 18;
    --error-color-rgb: 231, 76, 60;

    /* Typography Scale */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    min-height: 100vh;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

header h1 {
    font-size: var(--font-size-4xl);
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

header p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

/* Upload Section Enhancements */
.upload-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    margin-bottom: var(--spacing-xl);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.upload-section:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-tertiary);
    transform: scale(1.02);
}

.upload-area:hover::before {
    opacity: 0.05;
}

.upload-area.dragover {
    border-color: var(--primary-dark);
    background-color: rgba(52, 152, 219, 0.1);
    transform: scale(1.02);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--text-muted);
    transition: color var(--transition-normal), transform var(--transition-normal);
}

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

.upload-limits {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

/* Enhanced Validation Feedback Styles */
.upload-area.error {
    border-color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.05);
    animation: shake 0.5s ease-in-out;
}

.upload-area.success {
    border-color: var(--success-color);
    background-color: rgba(46, 204, 113, 0.05);
}

.upload-area.warning {
    border-color: var(--warning-color);
    background-color: rgba(241, 196, 15, 0.05);
}

/* Validation Message Styles */
.validation-message {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    white-space: nowrap;
    z-index: 10;
    animation: slideDown var(--transition-normal) ease-out;
    box-shadow: var(--shadow-medium);
}

.validation-message.error {
    background-color: var(--error-color);
    color: white;
}

.validation-message.success {
    background-color: var(--success-color);
    color: white;
}

.validation-message.warning {
    background-color: var(--warning-color);
    color: white;
}

.validation-message.info {
    background-color: var(--info-color);
    color: white;
}

/* File Preview Enhanced Styles */
.file-preview-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.file-preview-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.file-preview-item.error {
    border-color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.05);
}

.file-preview-item.success {
    border-color: var(--success-color);
    background-color: rgba(46, 204, 113, 0.05);
}

.file-preview-item.processing {
    border-color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.05);
}

/* File Status Indicators */
.file-status-badge {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.file-status-badge.error {
    background-color: var(--error-color);
    color: white;
}

.file-status-badge.success {
    background-color: var(--success-color);
    color: white;
}

.file-status-badge.warning {
    background-color: var(--warning-color);
    color: white;
}

.file-status-badge.processing {
    background-color: var(--primary-color);
    color: white;
    animation: pulse 2s infinite;
}

/* Enhanced Error States for Form Elements */
.modern-select.error,
.quality-slider.error {
    border-color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.05);
}

.modern-select.error:focus,
.quality-slider.error:focus {
    outline: none;
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2);
}

/* Accessibility Focus Improvements */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* File Preview Section */
.file-preview-section {
    margin-top: var(--spacing-xl);
    animation: slideDown var(--transition-normal) ease-out;
}

.file-preview-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.file-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.batch-controls {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    transition: all 0.3s ease;
}

.batch-controls:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(var(--primary-color-rgb), 0.1);
}

.batch-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.batch-count {
    font-weight: 600;
    color: var(--primary-color);
    font-size: var(--font-size-md);
}

.batch-size {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.batch-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.batch-action-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.batch-action-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--primary-color-rgb), 0.2);
}

.batch-action-btn:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: var(--font-size-md);
    line-height: 1;
}

.results-header-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    border: 1px solid var(--border-color);
}

.tab-btn {
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--text-secondary);
    flex: 1;
    text-align: center;
}

.tab-btn:hover {
    background: rgba(var(--primary-color-rgb), 0.1);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(var(--primary-color-rgb), 0.3);
}

.tab-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.tab-content {
    animation: fadeIn 0.3s ease;
}

.batch-summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.batch-summary-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.batch-summary-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.batch-summary-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.batch-summary-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.batch-summary-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.batch-summary-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.file-preview-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.file-preview-item.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.2);
}

.file-preview-item.selected::after {
    content: '✓';
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    background: var(--primary-color);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: bold;
    z-index: 2;
}

.file-preview-checkbox {
    position: absolute;
    top: var(--spacing-xs);
    left: var(--spacing-xs);
    z-index: 3;
    opacity: 0;
}

.file-preview-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.file-preview-item.selected:hover {
    border-color: var(--primary-light);
}

.file-preview-item:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-light);
}

.file-preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-preview-remove {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: var(--font-size-xs);
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-preview-item:hover .file-preview-remove {
    opacity: 1;
}

.file-preview-remove:hover {
    background: #c0392b;
}

.file-summary {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--text-secondary);
}

/* Processing Section Enhancements */
.processing-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    margin-bottom: var(--spacing-xl);
    animation: slideDown var(--transition-normal) ease-out;
}

.processing-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
}

.options-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

/* Radio Group Styling */
.radio-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.radio-label:hover {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.05);
}

.radio-label input[type="radio"] {
    margin: 0;
}

.radio-label:has(input:checked) {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
    color: var(--primary-color);
}

.radio-text {
    font-weight: 500;
}

/* Modern Select Styling */
.modern-select {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--spacing-md) center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: calc(var(--spacing-xl) + 16px);
}

.modern-select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.format-info {
    margin-top: var(--spacing-xs);
}

.format-description {
    color: var(--text-muted);
    font-style: italic;
}

/* Slider Enhancements */
.slider-container {
    position: relative;
}

.quality-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    appearance: none;
    cursor: pointer;
}

.quality-slider::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
}

.quality-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--primary-dark);
}

.quality-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
}

.slider-marks {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* Quality Presets */
.quality-presets {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.preset-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.preset-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(52, 152, 219, 0.05);
}

.preset-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Compression Preset Grid */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.preset-card {
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-height: 140px;
    position: relative;
    overflow: hidden;
}

.preset-card::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;
}

.preset-card:hover::before {
    left: 100%;
}

.preset-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.preset-card.active {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.05);
}

.preset-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.preset-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.preset-desc {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.preset-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
}

.preset-card.active .preset-stats {
    border-top-color: rgba(52, 152, 219, 0.3);
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.preset-card.active .stat {
    color: var(--primary-color);
}

.stat::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
}

.preset-card.active .stat::before {
    color: var(--primary-dark);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.primary-btn, .secondary-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.primary-btn {
    background: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-light);
}

.secondary-btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.secondary-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.primary-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Progress Section */
.progress-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    margin-bottom: var(--spacing-xl);
    animation: slideDown var(--transition-normal) ease-out;
}

.progress-container {
    max-width: 600px;
    margin: 0 auto;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
    overflow: hidden;
}

.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;
}

.progress-fill.indeterminate {
    animation: progressIndeterminate 1.5s infinite linear;
}

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

@keyframes progressIndeterminate {
    0% { transform: translateX(-100%) scaleX(0); }
    50% { transform: translateX(25%) scaleX(0.3); }
    100% { transform: translateX(125%) scaleX(0); }
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.progress-text {
    font-weight: 500;
    color: var(--text-primary);
}

.progress-percent {
    font-weight: 600;
    color: var(--primary-color);
}

.progress-details {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    max-height: 200px;
    overflow-y: auto;
    border-left: 4px solid var(--primary-color);
}

/* Enhanced Progress States */
.progress-section.processing {
    border-left: 4px solid var(--primary-color);
}

.progress-section.success {
    border-left: 4px solid var(--success-color);
}

.progress-section.error {
    border-left: 4px solid var(--error-color);
}

/* Progress Steps Indicator */
.progress-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.progress-steps::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--bg-tertiary);
    z-index: 1;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
    flex: 1;
}

.progress-step-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-normal);
    font-weight: 600;
    color: var(--text-muted);
}

.progress-step.active .progress-step-icon {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    animation: pulse 2s infinite;
}

.progress-step.completed .progress-step-icon {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.progress-step.error .progress-step-icon {
    background: var(--error-color);
    border-color: var(--error-color);
    color: white;
    animation: shake 0.5s ease-in-out;
}

.progress-step-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
    max-width: 80px;
}

.progress-step.active .progress-step-label {
    color: var(--primary-color);
    font-weight: 600;
}

.progress-step.completed .progress-step-label {
    color: var(--success-color);
    font-weight: 600;
}

/* Circular Progress Indicator */
.progress-circular {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: conic-gradient(
        var(--primary-color) 0deg,
        var(--primary-color) var(--progress-angle),
        var(--bg-tertiary) var(--progress-angle),
        var(--bg-tertiary) 360deg
    );
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin: 0 auto var(--spacing-md);
}

.progress-circular::before {
    content: '';
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-secondary);
    position: absolute;
}

.progress-circular-text {
    position: relative;
    z-index: 1;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

/* Processing Log Entry */
.progress-log-entry {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    animation: slideDown 0.3s ease-out;
}

.progress-log-entry:last-child {
    border-bottom: none;
}

.progress-log-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    margin-right: var(--spacing-sm);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.progress-log-icon.info {
    background: var(--info-color);
    color: white;
}

.progress-log-icon.success {
    background: var(--success-color);
    color: white;
}

.progress-log-icon.warning {
    background: var(--warning-color);
    color: white;
}

.progress-log-icon.error {
    background: var(--error-color);
    color: white;
}

.progress-log-content {
    flex: 1;
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.progress-log-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-left: var(--spacing-sm);
    flex-shrink: 0;
}

/* Results Section */
.results-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    animation: slideDown var(--transition-normal) ease-out;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
}

.results-actions {
    display: flex;
    gap: var(--spacing-md);
}

.results-summary {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.summary-item {
    text-align: center;
}

.summary-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.summary-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.result-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.result-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.result-info {
    padding: var(--spacing-lg);
}

.result-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
}

.result-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.result-stat {
    text-align: center;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.result-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.result-btn {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.result-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(52, 152, 219, 0.05);
}

/* Footer */
footer {
    text-align: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-medium);
    min-width: 300px;
    animation: slideInRight var(--transition-normal) ease-out;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toast.success {
    border-color: var(--secondary-color);
    background: rgba(46, 204, 113, 0.05);
}

.toast.error {
    border-color: var(--accent-color);
    background: rgba(231, 76, 60, 0.05);
}

.toast.warning {
    border-color: #f39c12;
    background: rgba(243, 156, 18, 0.05);
}

.toast-icon {
    font-size: var(--font-size-lg);
}

.toast.success .toast-icon {
    color: var(--secondary-color);
}

.toast.error .toast-icon {
    color: var(--accent-color);
}

.toast.warning .toast-icon {
    color: #f39c12;
}

.toast-message {
    flex: 1;
    font-weight: 500;
    color: var(--text-primary);
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes progressPulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

@keyframes elasticIn {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    header h1 {
        font-size: var(--font-size-3xl);
    }

    .options-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .results-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }

    .results-actions {
        flex-direction: column;
    }

    .action-buttons {
        flex-direction: column;
    }

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

    .file-preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    .results-summary {
        grid-template-columns: 1fr;
    }

    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }

    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .upload-area {
        padding: var(--spacing-lg);
    }

    .radio-group {
        flex-direction: column;
    }

    .quality-presets {
        flex-direction: column;
    }

    .result-stats {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.hidden { display: none !important; }
.visible { display: block !important; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

/* Focus States for Accessibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --text-muted: #666;
        --shadow-light: 0 2px 4px rgba(0,0,0,0.3);
    }
}

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