/* ============================================
   Text Transform Tool - Modern Stylesheet
   Matching Password Generator Design System
   ============================================ */

:root {
    --primary: #3B82F6;
    --primary-light: #DBEAFE;
    --primary-dark: #2563EB;
    --accent: #8B5CF6;
    --accent-light: #EDE9FE;
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    --orange: #F97316;
    
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --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;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg: #0f172a;
    --bg-elevated: #1e293b;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    
    --primary-light: rgba(59, 130, 246, 0.2);
    --accent-light: rgba(139, 92, 246, 0.2);
    --success-light: rgba(16, 185, 129, 0.2);
    --warning-light: rgba(245, 158, 11, 0.2);
    --danger-light: rgba(239, 68, 68, 0.2);
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.6);
}

*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg) 100%);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] body {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
}

/* Container */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* 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: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg), 0 0 30px rgba(59, 130, 246, 0.3);
    flex-shrink: 0;
}

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

.tool-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    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;
}

/* Theme Toggle Button */
.theme-toggle {
    width: 44px;
    height: 44px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin-left: auto;
    position: relative;
}

.theme-toggle i {
    width: 20px;
    height: 20px;
    position: absolute;
    transition: all 0.3s ease;
}

.theme-toggle .icon-dark {
    color: var(--primary);
    opacity: 1;
    transform: rotate(0deg);
}

.theme-toggle .icon-light {
    color: var(--warning);
    opacity: 0;
    transform: rotate(-90deg);
}

[data-theme="dark"] .theme-toggle .icon-dark {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-toggle .icon-light {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-toggle:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.tool-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Main Tool */
.tool-main {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border);
    overflow: hidden;
    padding: 2rem;
}

/* Text Section - Side by Side */
.text-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Text Panel */
.text-panel {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.input-panel {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.03), rgba(139, 92, 246, 0.02));
}

.output-panel {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.03), rgba(59, 130, 246, 0.02));
}

/* Panel Header */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 1rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.panel-header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
}

.panel-title i {
    width: 18px;
    height: 18px;
    color: var(--primary);
}

/* Expand Button */
.expand-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.expand-btn i {
    width: 16px;
    height: 16px;
}

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

/* Expanded/Fullscreen Panel */
.text-panel.expanded {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    border-radius: 0;
    display: flex;
    flex-direction: column;
    margin: 0;
}

.text-panel.expanded .panel-header {
    flex-shrink: 0;
}

.text-panel.expanded .text-area {
    flex: 1;
    min-height: 0;
    resize: none;
}

.text-panel.expanded .panel-footer {
    flex-shrink: 0;
}

.text-panel.expanded .expand-btn i {
    transform: rotate(45deg);
}

/* Overlay when panel is expanded */
.panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.panel-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.text-stats {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.stat-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-badge i {
    width: 12px;
    height: 12px;
}

/* Text Area */
.text-area {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: none;
    background: transparent;
    font-family: 'SF Mono', 'Fira Code', Monaco, monospace;
    font-size: 0.9rem;
    color: var(--text);
    resize: vertical;
    outline: none;
}

.text-area::placeholder {
    color: var(--text-muted);
}

.text-area:focus {
    background: rgba(255, 255, 255, 0.5);
}

/* Panel Footer */
.panel-footer {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
}

.mini-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.mini-btn i { width: 16px; height: 16px; }

.mini-btn:hover:not(:disabled) {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.mini-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.mini-btn.success {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* Results Toast */
.results-toast {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    animation: slideIn 0.3s ease;
}

.results-toast.success {
    background: linear-gradient(135deg, var(--success-light), rgba(16, 185, 129, 0.1));
    border: 1px solid var(--success);
}

.results-toast.error {
    background: linear-gradient(135deg, var(--danger-light), rgba(239, 68, 68, 0.1));
    border: 1px solid var(--danger);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast-content.success .toast-icon { color: var(--success); }
.toast-content.error .toast-icon { color: var(--danger); }

.toast-message {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.toast-content.success .toast-message { color: #047857; }
.toast-content.error .toast-message { color: #B91C1C; }

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Transform Categories */
.transforms-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.transform-category {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    border: 1px solid var(--border);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.category-title i {
    width: 18px;
    height: 18px;
    color: var(--primary);
}

/* Transform Grid */
.transform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
}

.preset-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

/* Transform Button */
.transform-btn {
    padding: 0.625rem 0.875rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.transform-btn:hover:not(:disabled) {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

.transform-btn:active:not(:disabled) {
    transform: translateY(0);
}

.transform-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.transform-btn .btn-name {
    display: block;
    font-family: 'SF Mono', Monaco, monospace;
}

/* Featured Transform Button */
.transform-btn.featured {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    text-align: left;
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg));
    border: 2px solid var(--border);
}

.transform-btn.featured:hover:not(:disabled) {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.transform-btn.featured .btn-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.transform-btn.featured .btn-icon i {
    width: 20px;
    height: 20px;
}

.transform-btn.featured .btn-content {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.transform-btn.featured .btn-name {
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
}

.transform-btn.featured .btn-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'SF Mono', Monaco, monospace;
}

/* Custom Replace Box */
.custom-replace-category {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.03), rgba(59, 130, 246, 0.02));
}

.custom-replace-box {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.replace-inputs {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
}

.input-group {
    flex: 1;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.text-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: var(--bg-elevated);
    color: var(--text);
    transition: all 0.2s ease;
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.replace-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.replace-arrow i {
    width: 20px;
    height: 20px;
}

.replace-options {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Checkbox Option */
.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.checkbox-box {
    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;
    color: transparent;
}

.checkbox-box i {
    width: 14px;
    height: 14px;
}

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

.checkbox-option:hover .checkbox-box {
    border-color: var(--primary);
}

/* Buttons */
.button-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
}

.btn i { width: 18px; height: 18px; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #DC2626);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

/* Related Section */
.related-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
    padding: 1.25rem 1.5rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    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: 0.4rem;
    padding: 0.5rem 1rem;
    background: var(--bg);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.related-link i { width: 16px; height: 16px; }

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

/* Info Grid */
.info-grid {
    display: grid;
    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: 1.25rem;
    color: var(--text);
    margin: 0 0 1.5rem;
}

.info-card h2 i { color: var(--primary); width: 24px; height: 24px; }

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.feature-box {
    display: flex;
    gap: 0.875rem;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
}

.feature-icon i { width: 20px; height: 20px; }

.feature-icon.purple { background: linear-gradient(135deg, var(--accent), #7C3AED); }
.feature-icon.blue { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.feature-icon.green { background: linear-gradient(135deg, var(--success), #059669); }
.feature-icon.orange { background: linear-gradient(135deg, var(--orange), #EA580C); }

.feature-text h4 {
    margin: 0 0 0.25rem;
    font-size: 0.9rem;
    color: var(--text);
}

.feature-text p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

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

.steps-list li {
    position: relative;
    padding-left: 3rem;
    padding-bottom: 1rem;
    counter-increment: step;
    color: var(--text-secondary);
}

.steps-list li:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 0.9rem;
    top: 2rem;
    bottom: 0;
    width: 2px;
    background: var(--primary-light);
}

.steps-list li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.75rem;
    height: 1.75rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
}

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

.use-case {
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.use-case-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.use-case-icon i {
    width: 18px;
    height: 18px;
}

.use-case-content h4 {
    margin: 0 0 0.25rem;
    font-size: 0.85rem;
    color: var(--text);
}

.use-case-content p {
    margin: 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* 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: 0.95rem;
    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 i {
    color: var(--primary);
    transition: transform 0.3s ease;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.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: 1.6;
}

/* Responsive Design */
@media (max-width: 900px) {
    .text-section {
        grid-template-columns: 1fr;
    }
    
    .text-area {
        min-height: 150px;
    }
    
    .preset-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .tool-container { padding: 1rem; }
    
    .tool-title-row { gap: 0.75rem; }
    
    .tool-icon-wrapper { width: 48px; height: 48px; }
    .tool-icon-wrapper i { width: 24px; height: 24px; }
    
    .tool-main { padding: 1.5rem; }
    
    .panel-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .transform-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .transform-btn.featured {
        flex-direction: column;
        text-align: center;
    }
    
    .transform-btn.featured .btn-icon {
        margin: 0 auto;
    }
    
    .replace-inputs {
        flex-direction: column;
    }
    
    .replace-arrow {
        transform: rotate(90deg);
    }
    
    .replace-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .replace-options .btn {
        width: 100%;
    }
    
    .features-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .related-section {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .transform-grid {
        grid-template-columns: 1fr;
    }
    
    .preset-grid {
        grid-template-columns: 1fr;
    }
    
    .text-stats {
        justify-content: center;
    }
    
    .feature-box,
    .use-case {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-icon,
    .use-case-icon {
        margin: 0 auto;
    }
}

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

[data-theme="dark"] .tool-main {
    background: var(--bg-elevated);
    border-color: var(--border);
}

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

[data-theme="dark"] .input-panel {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.03));
}

[data-theme="dark"] .output-panel {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(59, 130, 246, 0.03));
}

[data-theme="dark"] .panel-header,
[data-theme="dark"] .panel-footer {
    background: rgba(30, 41, 59, 0.8);
}

[data-theme="dark"] .text-area {
    background: transparent;
    color: var(--text);
}

[data-theme="dark"] .text-area:focus {
    background: rgba(255, 255, 255, 0.03);
}

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

[data-theme="dark"] .transform-btn {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
}

[data-theme="dark"] .transform-btn:hover:not(:disabled) {
    background: var(--primary-light);
    border-color: var(--primary);
}

[data-theme="dark"] .transform-btn.featured {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg));
}

[data-theme="dark"] .custom-replace-category {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(59, 130, 246, 0.03));
}

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

[data-theme="dark"] .text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

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

[data-theme="dark"] .related-section {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
}

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

[data-theme="dark"] .info-card {
    background: var(--bg-elevated);
    border-color: var(--border);
}

[data-theme="dark"] .feature-box,
[data-theme="dark"] .use-case {
    background: var(--bg);
    border-color: var(--border);
}

[data-theme="dark"] .faq-question {
    background: var(--bg);
    color: var(--text);
}

[data-theme="dark"] .faq-question:hover {
    background: var(--bg-elevated);
}

[data-theme="dark"] .faq-answer {
    background: var(--bg-elevated);
}

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

[data-theme="dark"] .mini-btn,
[data-theme="dark"] .expand-btn {
    background: var(--bg);
    border-color: var(--border);
    color: var(--text-secondary);
}

[data-theme="dark"] .stat-badge {
    background: var(--bg-elevated);
    border-color: var(--border);
}

[data-theme="dark"] .results-toast.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
}

[data-theme="dark"] .results-toast.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(239, 68, 68, 0.05));
}

[data-theme="dark"] .toast-content.success .toast-message {
    color: #34d399;
}

[data-theme="dark"] .toast-content.error .toast-message {
    color: #f87171;
}

/* 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;
    }
}