/* Ultimate Image Format Converter - Modern & Optimized Styles */
.uifc-container * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

.uifc-container {
    --uifc-primary: #6366F1;
    --uifc-primary-dark: #4F46E5;
    --uifc-secondary: #8B5CF6;
    --uifc-success: #10B981;
    --uifc-warning: #F59E0B;
    --uifc-error: #EF4444;
    --uifc-dark: #1F2937;
    --uifc-light: #F9FAFB;
    --uifc-gray: #F3F4F6;
    --uifc-gray-dark: #E5E7EB;
    --uifc-text: #111827;
    --uifc-text-light: #6B7280;
    
    --uifc-gradient-primary: linear-gradient(135deg, var(--uifc-primary) 0%, var(--uifc-secondary) 100%);
    --uifc-gradient-success: linear-gradient(135deg, var(--uifc-success) 0%, #059669 100%);
    --uifc-gradient-header: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    
    --uifc-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --uifc-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --uifc-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --uifc-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --uifc-border-radius: 16px;
    --uifc-border-radius-lg: 20px;
    --uifc-transition: all 0.2s ease;
    
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
    isolation: isolate;
    line-height: 1.5;
}

/* Performance optimizations */
.uifc-container {
    contain: content;
    will-change: transform, opacity;
}

.uifc-container img {
    content-visibility: auto;
}

/* Header Styles */
.uifc-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 4rem 2rem;
    background: var(--uifc-gradient-header);
    color: white;
    border-radius: var(--uifc-border-radius-lg);
    box-shadow: var(--uifc-shadow-lg);
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
}

.uifc-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.5;
}

.uifc-title {
    font-size: 2.75rem;
    margin-bottom: 1.25rem;
    font-weight: 800;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: -0.025em;
}

.uifc-description {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.uifc-features {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
}

.uifc-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.875rem 1.5rem;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    font-weight: 500;
    transition: var(--uifc-transition);
}

.uifc-feature:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* Card Styles */
.uifc-upload-card,
.uifc-settings-card,
.uifc-progress-card,
.uifc-results-card,
.uifc-error-card,
.uifc-preview-card {
    background: white;
    border-radius: var(--uifc-border-radius);
    padding: 2.5rem;
    box-shadow: var(--uifc-shadow);
    margin-bottom: 2rem;
    transition: var(--uifc-transition);
    border: 1px solid var(--uifc-gray-dark);
    position: relative;
    overflow: hidden;
}

.uifc-upload-card::before,
.uifc-settings-card::before,
.uifc-progress-card::before,
.uifc-results-card::before,
.uifc-error-card::before,
.uifc-preview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--uifc-gradient-primary);
}

.uifc-upload-card:hover,
.uifc-settings-card:hover {
    box-shadow: var(--uifc-shadow-lg);
    transform: translateY(-4px);
}

/* Upload Area */
.uifc-upload-area {
    border: 3px dashed var(--uifc-gray-dark);
    border-radius: var(--uifc-border-radius);
    padding: 4rem 2.5rem;
    text-align: center;
    transition: var(--uifc-transition);
    position: relative;
    background: var(--uifc-light);
    cursor: pointer;
}

.uifc-upload-area.dragover {
    border-color: var(--uifc-primary);
    background: rgba(99, 102, 241, 0.03);
    transform: scale(1.01);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.uifc-upload-icon {
    font-size: 4.5rem;
    color: var(--uifc-primary);
    margin-bottom: 1.75rem;
    transition: var(--uifc-transition);
}

.uifc-upload-area:hover .uifc-upload-icon {
    transform: scale(1.1);
}

.uifc-upload-text {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--uifc-text);
    transition: var(--uifc-transition);
}

.uifc-upload-or {
    color: var(--uifc-text-light);
    margin: 1.5rem 0;
    font-weight: 500;
    font-size: 1.1rem;
}

.uifc-upload-btn {
    background: var(--uifc-gradient-primary);
    color: white;
    border: none;
    padding: 1.125rem 2.5rem;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--uifc-transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--uifc-shadow);
    position: relative;
    overflow: hidden;
}

.uifc-upload-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: 0.5s;
}

.uifc-upload-btn:hover::before {
    left: 100%;
}

.uifc-upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--uifc-shadow-lg);
}

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

.uifc-supported-formats {
    margin-top: 2rem;
    color: var(--uifc-text-light);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Settings Styles */
.uifc-settings-title {
    margin-bottom: 2.25rem;
    color: var(--uifc-text);
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.uifc-settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.uifc-setting-group {
    margin-bottom: 2.25rem;
}

.uifc-setting-label {
    display: block;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--uifc-text);
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.25rem;
}

/* Format Buttons */
.uifc-format-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.uifc-format-btn {
    padding: 1.5rem;
    border: 2px solid var(--uifc-gray-dark);
    border-radius: 12px;
    background: white;
    cursor: pointer;
    transition: var(--uifc-transition);
    text-align: center;
}

.uifc-format-btn:hover {
    border-color: var(--uifc-primary);
    transform: translateY(-2px);
    box-shadow: var(--uifc-shadow);
}

.uifc-format-btn.active {
    background: var(--uifc-gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.uifc-format-name {
    display: block;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.uifc-format-desc {
    display: block;
    font-size: 0.9rem;
    color: var(--uifc-text-light);
    opacity: 0.8;
}

.uifc-format-btn.active .uifc-format-desc {
    color: rgba(255, 255, 255, 0.9);
}

/* Quality Slider */
.uifc-quality-slider-container {
    margin-top: 1rem;
}

.uifc-quality-slider {
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: var(--uifc-gray);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: var(--uifc-transition);
    cursor: pointer;
}

.uifc-quality-slider:hover {
    background: var(--uifc-gray-dark);
}

.uifc-quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--uifc-gradient-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4);
    border: 3px solid white;
    transition: var(--uifc-transition);
}

.uifc-quality-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.5);
}

.uifc-quality-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--uifc-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4);
    border: 3px solid white;
    transition: var(--uifc-transition);
}

.uifc-quality-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.5);
}

.uifc-quality-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.75rem;
    color: var(--uifc-text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.uifc-quality-value {
    text-align: center;
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 14px;
    font-weight: 600;
    transition: var(--uifc-transition);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.uifc-quality-value:hover {
    background: rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
}

.uifc-quality-value span:first-child {
    font-size: 1.5rem;
    color: var(--uifc-primary);
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.uifc-quality-value span:last-child {
    color: var(--uifc-text-light);
    font-size: 1rem;
}

/* Checkbox Styles */
.uifc-checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 500;
    margin-bottom: 1rem;
}

.uifc-checkbox-checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--uifc-gray-dark);
    border-radius: 5px;
    display: inline-block;
    position: relative;
    transition: var(--uifc-transition);
}

input[type="checkbox"]:checked + .uifc-checkbox-checkmark {
    background: var(--uifc-gradient-primary);
    border-color: transparent;
}

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

.uifc-transparency-note {
    font-size: 0.9rem;
    color: var(--uifc-text-light);
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Preview Card */
.uifc-preview-card {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #bae6fd;
    transition: var(--uifc-transition);
}

.uifc-preview-card:hover {
    box-shadow: var(--uifc-shadow);
    transform: translateY(-3px);
}

.uifc-preview-card h4 {
    margin-bottom: 1.5rem;
    color: var(--uifc-text);
    font-weight: 600;
    font-size: 1.3rem;
}

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

.uifc-preview-stat {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 14px;
    box-shadow: var(--uifc-shadow);
    transition: var(--uifc-transition);
}

.uifc-preview-stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--uifc-shadow-lg);
}

.uifc-preview-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--uifc-primary);
    margin-bottom: 0.5rem;
}

.uifc-preview-label {
    font-size: 0.9rem;
    color: var(--uifc-text-light);
    font-weight: 600;
}

/* Button Styles */
.uifc-btn-primary {
    background: var(--uifc-gradient-primary);
    color: white;
    border: none;
    padding: 1.25rem 2.5rem;
    border-radius: 50px;
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--uifc-transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--uifc-shadow);
    position: relative;
    overflow: hidden;
}

.uifc-btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: 0.5s;
}

.uifc-btn-primary:hover::before {
    left: 100%;
}

.uifc-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--uifc-shadow-lg);
}

.uifc-btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.uifc-btn-success {
    background: var(--uifc-gradient-success);
    color: white;
    border: none;
    padding: 1.125rem 2.25rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--uifc-transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--uifc-shadow);
}

.uifc-btn-success:hover {
    transform: translateY(-3px);
    box-shadow: var(--uifc-shadow-lg);
}

.uifc-btn-secondary {
    background: var(--uifc-light);
    color: var(--uifc-text);
    border: 2px solid var(--uifc-gray-dark);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--uifc-transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.uifc-btn-secondary:hover {
    border-color: var(--uifc-primary);
    color: var(--uifc-primary);
    transform: translateY(-2px);
    box-shadow: var(--uifc-shadow);
}

.uifc-convert-btn {
    width: 100%;
    justify-content: center;
    font-size: 1.3rem;
    padding: 1.5rem 2.5rem;
    margin-top: 2rem;
}

/* Progress Styles */
.uifc-progress-header {
    text-align: center;
    margin-bottom: 2rem;
}

.uifc-progress-header h4 {
    margin-top: 1.25rem;
    color: var(--uifc-text);
    font-weight: 600;
    font-size: 1.4rem;
}

.uifc-progress-bar {
    width: 100%;
    height: 16px;
    background: var(--uifc-gray);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.uifc-progress-fill {
    height: 100%;
    background: var(--uifc-gradient-primary);
    border-radius: 8px;
    transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    width: 0%;
    position: relative;
    overflow: hidden;
}

.uifc-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: progressShine 1.5s infinite;
}

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

.uifc-progress-text {
    text-align: center;
    margin-top: 1.25rem;
    font-weight: 600;
    color: var(--uifc-text);
    font-size: 1.15rem;
}

/* Results Styles */
.uifc-results-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.uifc-results-header h4 {
    color: var(--uifc-success);
    font-size: 2rem;
    font-weight: 700;
}

.uifc-results-content {
    margin-bottom: 2.5rem;
}

.uifc-result-item {
    background: var(--uifc-light);
    border-radius: var(--uifc-border-radius);
    padding: 2.5rem;
    margin-bottom: 2.5rem;
    border: 1px solid var(--uifc-gray-dark);
    transition: var(--uifc-transition);
}

.uifc-result-item:hover {
    box-shadow: var(--uifc-shadow-lg);
    transform: translateY(-3px);
}

.uifc-conversion-info {
    background: rgba(16, 185, 129, 0.1);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    font-size: 1.15rem;
    color: var(--uifc-success);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
}

.uifc-conversion-info i {
    font-size: 1.1rem;
}

.uifc-result-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.uifc-result-original,
.uifc-result-converted {
    text-align: center;
}

.uifc-result-original h6,
.uifc-result-converted h6 {
    margin-bottom: 1.5rem;
    color: var(--uifc-text);
    font-weight: 600;
    font-size: 1.3rem;
}

.uifc-image-container {
    margin-bottom: 1.5rem;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--uifc-shadow-lg);
    transition: var(--uifc-transition);
}

.uifc-image-container:hover {
    transform: translateY(-3px);
    box-shadow: var(--uifc-shadow-xl);
}

.uifc-result-image {
    width: 100%;
    height: auto;
    display: block;
    max-height: 320px;
    object-fit: contain;
    transition: var(--uifc-transition);
}

.uifc-result-image:hover {
    transform: scale(1.02);
}

.uifc-image-specs {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.uifc-spec-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 1.05rem;
    color: var(--uifc-text-light);
    font-weight: 500;
}

/* Result Stats */
.uifc-result-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.uifc-stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: var(--uifc-shadow);
    transition: var(--uifc-transition);
    text-align: center;
}

.uifc-stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--uifc-shadow-lg);
}

.uifc-stat-card.uifc-stat-success {
    border-left: 5px solid var(--uifc-success);
}

.uifc-stat-card.uifc-stat-primary {
    border-left: 5px solid var(--uifc-primary);
}

.uifc-stat-card.uifc-stat-warning {
    border-left: 5px solid var(--uifc-warning);
}

.uifc-stat-icon {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: var(--uifc-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.9rem;
    transition: var(--uifc-transition);
}

.uifc-stat-card:hover .uifc-stat-icon {
    transform: scale(1.1);
}

.uifc-stat-success .uifc-stat-icon {
    color: var(--uifc-success);
    background: rgba(16, 185, 129, 0.1);
}

.uifc-stat-primary .uifc-stat-icon {
    color: var(--uifc-primary);
    background: rgba(99, 102, 241, 0.1);
}

.uifc-stat-warning .uifc-stat-icon {
    color: var(--uifc-warning);
    background: rgba(245, 158, 11, 0.1);
}

.uifc-stat-value {
    font-size: 1.9rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.uifc-stat-success .uifc-stat-value {
    color: var(--uifc-success);
}

.uifc-stat-primary .uifc-stat-value {
    color: var(--uifc-primary);
}

.uifc-stat-warning .uifc-stat-value {
    color: var(--uifc-warning);
}

.uifc-stat-label {
    font-size: 1.05rem;
    color: var(--uifc-text-light);
    font-weight: 600;
}

.uifc-result-actions {
    text-align: center;
}

/* Error Styles */
.uifc-error-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.uifc-error-header h4 {
    color: var(--uifc-error);
    font-size: 1.7rem;
    font-weight: 700;
}

.uifc-error-message {
    text-align: center;
    color: var(--uifc-error);
    font-weight: 700;
    font-size: 1.15rem;
    padding: 1.5rem;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 12px;
}

/* Animations */
.uifc-fade-in {
    animation: uifcFadeIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

.uifc-spin {
    animation: uifcSpin 1s linear infinite;
}

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

/* Icon Styles */
.uifc-icon-convert:before { content: "🔄"; }
.uifc-icon-cloud-upload:before { content: "☁️"; }
.uifc-icon-image:before { content: "🖼️"; }
.uifc-icon-folder:before { content: "📁"; }
.uifc-icon-info:before { content: "ℹ️"; }
.uifc-icon-settings:before { content: "⚙️"; }
.uifc-icon-quality:before { content: "🎯"; }
.uifc-icon-format:before { content: "🔤"; }
.uifc-icon-check:before { content: "✅"; }
.uifc-icon-bolt:before { content: "⚡"; }
.uifc-icon-spinner:before { content: "⏳"; }
.uifc-icon-success:before { content: "🎉"; }
.uifc-icon-error:before { content: "❌"; }
.uifc-icon-redo:before { content: "↩️"; }
.uifc-icon-download:before { content: "📥"; }
.uifc-icon-dimensions:before { content: "📐"; }
.uifc-icon-size:before { content: "💾"; }
.uifc-icon-perfect:before { content: "✨"; }
.uifc-icon-algorithm:before { content: "🧠"; }

/* Responsive Design */
@media (max-width: 1024px) {
    .uifc-container {
        padding: 1.25rem;
    }
    
    .uifc-title {
        font-size: 2.5rem;
    }
    
    .uifc-features {
        gap: 1rem;
    }
    
    .uifc-format-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .uifc-preview-stats,
    .uifc-result-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .uifc-result-comparison {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .uifc-title {
        font-size: 2.25rem;
    }
    
    .uifc-header {
        padding: 3rem 1.5rem;
    }
    
    .uifc-description {
        font-size: 1.15rem;
    }
    
    .uifc-upload-card,
    .uifc-settings-card,
    .uifc-progress-card,
    .uifc-results-card,
    .uifc-error-card,
    .uifc-preview-card {
        padding: 2rem 1.5rem;
    }
    
    .uifc-upload-area {
        padding: 3rem 1.5rem;
    }
    
    .uifc-result-comparison {
        grid-template-columns: 1fr;
    }
    
    .uifc-result-stats {
        grid-template-columns: 1fr;
    }
    
    .uifc-preview-stats {
        grid-template-columns: 1fr;
    }
    
    .uifc-format-buttons {
        grid-template-columns: 1fr;
    }
    
    .uifc-stat-card {
        flex-direction: column;
        text-align: center;
        gap: 1.25rem;
    }
}

@media (max-width: 480px) {
    .uifc-container {
        padding: 1rem;
    }
    
    .uifc-header {
        padding: 2.5rem 1.25rem;
        margin-bottom: 2rem;
    }
    
    .uifc-title {
        font-size: 2rem;
    }
    
    .uifc-description {
        font-size: 1.05rem;
        margin-bottom: 2rem;
    }
    
    .uifc-feature {
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .uifc-upload-card,
    .uifc-settings-card,
    .uifc-progress-card,
    .uifc-results-card,
    .uifc-error-card,
    .uifc-preview-card {
        padding: 1.75rem 1.25rem;
        margin-bottom: 1.5rem;
    }
    
    .uifc-upload-area {
        padding: 2.5rem 1.25rem;
    }
    
    .uifc-upload-btn {
        padding: 1rem 2rem;
        font-size: 1.1rem;
    }
    
    .uifc-convert-btn {
        padding: 1.25rem 2rem;
        font-size: 1.2rem;
    }
    
    .uifc-quality-value {
        padding: 1.25rem;
    }
    
    .uifc-preview-stat {
        padding: 1.5rem;
    }
    
    .uifc-stat-card {
        padding: 1.5rem 1.25rem;
    }
    
    .uifc-stat-icon {
        width: 55px;
        height: 55px;
        font-size: 1.5rem;
    }
    
    .uifc-stat-value {
        font-size: 1.5rem;
    }
}

/* Performance optimizations */
.uifc-container {
    contain: layout style paint;
}

.uifc-container * {
    backface-visibility: hidden;
}

/* Custom scrollbar */
.uifc-container ::-webkit-scrollbar {
    width: 8px;
}

.uifc-container ::-webkit-scrollbar-track {
    background: var(--uifc-light);
    border-radius: 4px;
}

.uifc-container ::-webkit-scrollbar-thumb {
    background: var(--uifc-gray-dark);
    border-radius: 4px;
}

.uifc-container ::-webkit-scrollbar-thumb:hover {
    background: var(--uifc-text-light);
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .uifc-container * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}