/* ============================================
   Favicon Generator - Modern Stylesheet
   Blue/Teal Color Theme for ConvertICO
   ============================================ */

/* CSS Variables */
:root {
    --primary: #0EA5E9;
    --primary-light: #BAE6FD;
    --primary-dark: #0284C7;
    --accent: #06B6D4;
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    
    --standard: #0EA5E9;
    --hidpi: #06B6D4;
    --desktop: #0891B2;
    --large: #0E7490;
    
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* Base */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg) 0%, #f1f5f9 100%);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* Container */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-icon-wrapper {
    width: 64px;
    height: 64px;
    background: var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg), 0 0 40px rgba(14, 165, 233, 0.25);
    flex-shrink: 0;
}

.tool-icon-wrapper img {
    width: 32px;
    height: 32px;
    filter: brightness(0) invert(1);
}

.tool-icon-wrapper svg,
.tool-icon-wrapper i {
    width: 28px;
    height: 28px;
}

.tool-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.tool-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Main Tool Area */
.tool-main {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border);
    position: relative;
}

/* Upload Section */
.upload-section {
    padding: 3rem;
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(6, 182, 212, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-area:hover,
.upload-area.dragover,
.upload-area.active {
    border-color: var(--primary);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-area:hover::before,
.upload-area.dragover::before,
.upload-area.active::before {
    opacity: 1;
}

.upload-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.upload-area:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.5rem;
}

.upload-subtitle {
    color: var(--text-secondary);
    margin: 0 0 1.5rem;
    font-size: 1rem;
}

.upload-hint {
    display: inline-block;
    background: var(--bg);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    margin-top: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.45);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

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

.btn-secondary:hover {
    background: #f1f5f9;
    border-color: var(--text-muted);
}

.btn-browse {
    margin-top: 1rem;
}

/* Editor Section */
.editor-section {
    padding: 2rem;
    border-top: 1px solid var(--border);
    animation: fadeIn 0.4s ease;
}

/* Preview Panel */
.preview-panel {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.panel-header {
    margin-bottom: 1.25rem;
}

.panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.panel-header h3 svg,
.panel-header h3 i {
    color: var(--primary);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.preview-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.preview-mock {
    width: 100%;
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.preview-mock.browser-tab .mock-bar {
    background: linear-gradient(to bottom, #e5e7eb, #d1d5db);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.mock-dots {
    display: flex;
    gap: 0.375rem;
}

.mock-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.mock-dots span:nth-child(1) { background: #EF4444; }
.mock-dots span:nth-child(2) { background: #F59E0B; }
.mock-dots span:nth-child(3) { background: #10B981; }

.mock-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    padding: 0.375rem 0.75rem;
    border-radius: 6px 6px 0 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
    max-width: 150px;
}

.mock-tab img {
    width: 16px;
    height: 16px;
    object-fit: contain;
}

.mock-tab span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preview-mock.address-bar {
    padding: 1rem;
}

.mock-address {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.mock-address svg {
    color: var(--success);
    flex-shrink: 0;
}

.mock-address img {
    width: 16px;
    height: 16px;
    object-fit: contain;
}

.preview-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.option-card {
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--border);
}

.option-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.option-header svg,
.option-header i {
    color: var(--primary);
}

.option-header h4 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
}

/* Size Options */
.size-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.size-option {
    position: relative;
    cursor: pointer;
}

.size-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.size-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 0.5rem;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.size-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.size-unit {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.size-desc {
    display: block;
    font-size: 0.65rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.375rem;
}

.size-option:hover .size-box {
    border-color: var(--primary-light);
    background: #f8fafc;
}

.size-option input:checked + .size-box {
    border-color: var(--primary);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.size-option input:checked + .size-box .size-value {
    color: var(--primary);
}

/* Quality Slider */
.quality-slider-container {
    padding: 0.5rem 0;
}

.quality-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, var(--success), var(--warning), var(--danger));
    outline: none;
    margin: 0.75rem 0;
}

.quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 3px solid var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
}

.quality-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.quality-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 3px solid var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.slider-labels span:nth-child(2) {
    font-weight: 600;
    color: var(--text);
}

/* Background Options */
.bg-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.bg-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    cursor: pointer;
}

.bg-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.bg-preview {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.bg-preview.transparent {
    background: repeating-conic-gradient(#e5e7eb 0% 25%, transparent 0% 50%) 50% / 12px 12px;
    color: var(--text-muted);
}

.bg-preview.white {
    background: white;
}

.bg-preview.black {
    background: #1e293b;
}

.bg-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}

.bg-option:hover .bg-preview {
    border-color: var(--primary-light);
}

.bg-option input:checked ~ .bg-preview {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.color-picker {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
}

/* Enhancement Options */
.enhancement-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
}

.checkbox-option:hover {
    background: rgba(14, 165, 233, 0.05);
}

.checkbox-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkbox-mark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.checkbox-option input:checked + .checkbox-mark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-option input:checked + .checkbox-mark::after {
    content: '';
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.checkbox-label svg,
.checkbox-label i {
    color: var(--primary);
    flex-shrink: 0;
}

/* Action Bar */
.action-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* Progress */
.progress-container {
    margin-top: 1.5rem;
    text-align: center;
}

.progress-bar {
    height: 8px;
    background: var(--bg);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Results Section */
.results-section {
    padding: 2rem;
}

.iconblock {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 1px solid var(--success);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    animation: fadeIn 0.4s ease;
}

.iconblock.newest {
    border-left: 4px solid var(--success);
}

.result-flex-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.info-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.info-section .icon {
    width: 56px;
    height: 56px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.info-section .icon img {
    max-width: 32px;
    max-height: 32px;
}

.info-section .details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-section .filename {
    font-weight: 600;
    color: var(--text);
    font-size: 1rem;
}

.details-meta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.details-meta span {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.7);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.download-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
}

.delete-icon {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 28px;
    height: 28px;
    background: var(--danger);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.delete-icon:hover {
    background: #DC2626;
    transform: scale(1.1);
}

/* Error Message */
.error-message {
    margin: 1.5rem 2rem;
    padding: 1rem 1.5rem;
    background: var(--danger-light);
    border: 1px solid var(--danger);
    border-radius: var(--radius-md);
    color: #991B1B;
}

.error-message p {
    margin: 0;
}

/* Related Tools */
.related-tools {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    flex-wrap: wrap;
}

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

.related-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.related-link:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary-dark);
}

.related-link svg,
.related-link i {
    color: var(--primary);
}

/* Info Sections */
.info-sections {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.info-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.35rem;
    color: var(--text);
    margin: 0 0 1.5rem;
}

.info-card h2 svg,
.info-card h2 i {
    color: var(--primary);
    flex-shrink: 0;
}

.info-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 1rem;
}

.info-card code {
    background: var(--bg);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.875em;
    color: var(--primary-dark);
}

/* Steps List */
.steps-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: step;
}

.steps-list li {
    position: relative;
    padding-left: 3.5rem;
    padding-bottom: 1.25rem;
    counter-increment: step;
    color: var(--text-secondary);
    line-height: 1.6;
}

.steps-list li:not(:last-child)::after {
    content: '';
    position: absolute;
    left: calc(1rem - 1px);
    top: 2rem;
    bottom: 0;
    width: 2px;
    background: var(--primary-light);
}

.steps-list li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    z-index: 1;
}

/* Mode Explanations */
.mode-explanations {
    display: grid;
    gap: 1rem;
}

.mode-explain {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.mode-tag {
    flex-shrink: 0;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.mode-tag.standard { background: linear-gradient(135deg, var(--standard), #0284C7); }
.mode-tag.hidpi { background: linear-gradient(135deg, var(--hidpi), #0891B2); }
.mode-tag.desktop { background: linear-gradient(135deg, var(--desktop), #0E7490); }
.mode-tag.large { background: linear-gradient(135deg, var(--large), #155E75); }

.mode-explain p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Use Cases Grid */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.use-case {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.use-case:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.use-case-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.use-case-content h4 {
    margin: 0 0 0.375rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.use-case-content p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.use-cases-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--radius-md);
    border: 1px solid var(--primary);
    margin-top: 0;
}

.use-cases-tip svg,
.use-cases-tip i {
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.use-cases-tip span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.use-cases-tip a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.use-cases-tip a:hover {
    text-decoration: underline;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg);
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.faq-question:hover {
    background: var(--bg-elevated);
}

.faq-question svg,
.faq-question i {
    color: var(--primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-question svg,
.faq-item.open .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 1.25rem 1rem;
    background: var(--bg-elevated);
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Responsive */
@media (max-width: 900px) {
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .preview-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .tool-container {
        padding: 1rem;
    }
    
    .tool-title-row {
        flex-direction: row;
        gap: 0.75rem;
    }
    
    .tool-icon-wrapper {
        width: 48px;
        height: 48px;
    }

    .tool-icon-wrapper svg,
    .tool-icon-wrapper i {
        width: 24px;
        height: 24px;
    }
    
    .upload-section {
        padding: 2rem 1.5rem;
    }
    
    .editor-section {
        padding: 1.5rem;
    }
    
    .size-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .bg-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .action-bar {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .related-tools {
        flex-direction: column;
        text-align: center;
    }
    
    .related-links {
        justify-content: center;
    }
    
    .result-flex-container {
        flex-direction: column;
        text-align: center;
    }
    
    .info-section {
        flex-direction: column;
    }
    
    .mode-explain {
        flex-direction: column;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .tool-title {
        font-size: 1.5rem;
    }
    
    .size-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-list li {
        padding-left: 3rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}