/* ============================================
   Screen Capture Tool - ConvertICO
   Modern Design with Dark Mode Support
   ============================================ */

/* CSS Variables - Light Mode (Default) */
:root {
    /* Primary Colors */
    --primary: #8B5CF6;
    --primary-light: #C4B5FD;
    --primary-dark: #7C3AED;
    --primary-glow: rgba(139, 92, 246, 0.2);
    
    /* Secondary / Accent */
    --accent: #06B6D4;
    --accent-light: #67E8F9;
    
    /* Status Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    
    /* Background Colors */
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    
    /* Text Colors */
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* Border Colors */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition: all 0.2s ease;
    --transition-slow: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary: #A78BFA;
    --primary-light: #7C3AED;
    --primary-dark: #8B5CF6;
    --primary-glow: rgba(167, 139, 250, 0.2);
    
    --accent: #22D3EE;
    --accent-light: #0891B2;
    
    --success: #34D399;
    --success-light: rgba(52, 211, 153, 0.1);
    --warning: #FBBF24;
    --warning-light: rgba(251, 191, 36, 0.1);
    --danger: #F87171;
    --danger-light: rgba(248, 113, 113, 0.1);
    
    --bg: #0f172a;
    --bg-elevated: #1e293b;
    --bg-secondary: #334155;
    --bg-tertiary: #475569;
    
    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border: #334155;
    --border-light: #475569;
    
    --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, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-secondary) 100%);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 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: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg), 0 0 40px var(--primary-glow);
    flex-shrink: 0;
}

.tool-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -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: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Browser Notice */
.browser-notice {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem 1.25rem;
    background: var(--warning-light);
    border-radius: var(--radius-md);
    color: #92400e;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

[data-theme="dark"] .browser-notice {
    background: rgba(251, 191, 36, 0.15);
    color: var(--warning);
}

.browser-notice i {
    color: var(--warning);
    flex-shrink: 0;
}

/* 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);
    padding: 2rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Mode Selection Tabs */
.mode-section {
    margin-bottom: 2rem;
}

.mode-tabs {
    display: flex;
    gap: 8px;
    padding: 6px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.mode-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.mode-tab:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] .mode-tab:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mode-tab.active {
    background: var(--bg-elevated);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.mode-tab i {
    flex-shrink: 0;
}

/* Capture Section */
.capture-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Source Options */
.source-options h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 1rem 0;
}

.source-options h3 i {
    color: var(--primary);
}

.source-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.source-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.source-card:hover {
    border-color: var(--primary-light);
    background: var(--bg-elevated);
}

.source-card:has(input:checked) {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(6, 182, 212, 0.05));
}

[data-theme="dark"] .source-card:has(input:checked) {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(6, 182, 212, 0.1));
}

.source-card input {
    display: none;
}

.source-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.source-card:has(input:checked) .source-icon {
    transform: scale(1.05);
    box-shadow: 0 4px 15px var(--primary-glow);
}

.source-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

.source-desc {
    font-size: 12px;
    color: var(--text-muted);
}

/* Options Panel */
.options-panel {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

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

.option-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    transition: background-color 0.3s ease;
}

.option-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
}

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

.option-header h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

/* Format Options */
.format-options {
    display: flex;
    gap: 10px;
}

.format-option {
    flex: 1;
    cursor: pointer;
}

.format-option input {
    display: none;
}

.format-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

.format-option input:checked + .format-box {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.08), rgba(6, 182, 212, 0.05));
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.format-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
}

.format-desc {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Quality Slider */
.quality-slider-container {
    padding: 0 5px;
}

.quality-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    border-radius: var(--radius-full);
    background: linear-gradient(to right, var(--accent), var(--primary));
    outline: none;
    margin: 12px 0;
}

.quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 3px solid var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.quality-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    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: 12px;
    color: var(--text-muted);
}

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

/* Quality Options (Recording) */
.quality-options {
    display: flex;
    gap: 10px;
}

.quality-option {
    flex: 1;
    cursor: pointer;
}

.quality-option input {
    display: none;
}

.quality-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

.quality-option input:checked + .quality-box {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.08), rgba(6, 182, 212, 0.05));
}

.quality-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.quality-detail {
    font-size: 11px;
    color: var(--text-muted);
}

/* Audio Options */
.audio-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Checkbox Option */
.checkbox-option {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.checkbox-option:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.03), rgba(6, 182, 212, 0.03));
    border-color: var(--primary-light);
}

.checkbox-option input {
    display: none;
}

.checkbox-mark {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-elevated);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    margin-top: 2px;
}

.checkbox-option input:checked + .checkbox-mark {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    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-content {
    flex: 1;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text);
    font-size: 14px;
}

.checkbox-label i {
    color: var(--primary);
}

.checkbox-hint {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Action Bar */
.action-bar {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding-top: 1.5rem;
    margin-top: 1.5rem;
    border-top: 1px solid var(--border);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn i {
    flex-shrink: 0;
}

.btn-primary,
.btn-capture {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover,
.btn-capture:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border);
}

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

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-danger,
.btn-stop {
    background: linear-gradient(135deg, var(--danger), #DC2626);
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
    animation: pulse-danger 2s infinite;
}

.btn-stop:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

@keyframes pulse-danger {
    0%, 100% { box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3); }
    50% { box-shadow: 0 4px 25px rgba(239, 68, 68, 0.5); }
}

.btn-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-text:hover {
    background: var(--danger-light);
    color: var(--danger);
}

/* Recording Timer */
.recording-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 1rem;
    background: var(--danger-light);
    border-radius: var(--radius-md);
    margin-top: 1rem;
}

[data-theme="dark"] .recording-timer {
    background: rgba(239, 68, 68, 0.15);
}

.timer-dot {
    width: 12px;
    height: 12px;
    background: var(--danger);
    border-radius: 50%;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.timer-label {
    font-weight: 600;
    color: var(--danger);
    font-size: 14px;
}

.timer-display {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 18px;
    font-weight: 700;
    color: var(--danger);
}

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

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.preview-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.preview-header h3 i {
    color: var(--primary);
}

.preview-actions {
    display: flex;
    gap: 8px;
}

.preview-container {
    background: 
        linear-gradient(45deg, var(--bg-secondary) 25%, transparent 25%),
        linear-gradient(-45deg, var(--bg-secondary) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--bg-secondary) 75%),
        linear-gradient(-45deg, transparent 75%, var(--bg-secondary) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    background-color: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    border: 1px solid var(--border);
}

.preview-container img,
.preview-container video {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.preview-info {
    text-align: center;
    padding: 1rem;
    font-size: 14px;
    color: var(--text-secondary);
}

.preview-download {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

/* History Section */
.history-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

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

.history-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.history-header h3 i {
    color: var(--primary);
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
}

.history-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 16/9;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.history-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.history-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.history-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 6px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    text-align: center;
}

.history-overlay span {
    font-size: 11px;
    font-weight: 600;
    color: white;
}

/* Related Tools */
.related-tools {
    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;
    border: 1px solid var(--border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

.related-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.related-link:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.related-link i {
    color: inherit;
}

/* Info Sections */
.info-sections {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.info-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Gradient bottom bar for info cards */
.info-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--accent), var(--success));
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.35rem;
    color: var(--text);
    margin: 0 0 1.5rem;
}

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

/* 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: 1.7;
}

.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;
}

.steps-list li a {
    color: var(--primary);
    text-decoration: none;
}

.steps-list li a:hover {
    text-decoration: underline;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-item:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(6, 182, 212, 0.05));
}

[data-theme="dark"] .feature-item:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1));
}

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

.feature-content h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 6px;
}

.feature-content p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Browser Grid */
.browser-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.browser-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 1.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.browser-item i {
    color: var(--text-muted);
}

.browser-item.supported i {
    color: var(--success);
}

.browser-item.partial i {
    color: var(--warning);
}

.browser-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.browser-status {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.browser-item.supported .browser-status {
    background: var(--success-light);
    color: var(--success);
}

[data-theme="dark"] .browser-item.supported .browser-status {
    background: rgba(16, 185, 129, 0.15);
}

.browser-item.partial .browser-status {
    background: var(--warning-light);
    color: #B45309;
}

[data-theme="dark"] .browser-item.partial .browser-status {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.browser-note {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    line-height: 1.5;
}

.browser-note i {
    color: var(--accent);
    flex-shrink: 0;
}

.browser-note a {
    color: var(--primary);
    text-decoration: none;
}

.browser-note a:hover {
    text-decoration: underline;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.faq-item:hover {
    border-color: var(--primary-light);
}

.faq-question {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: none;
    text-align: left;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-question i {
    color: var(--primary);
    transition: transform 0.3s ease;
    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: 1.7;
    font-size: 14px;
}

.faq-answer a {
    color: var(--primary);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

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

/* Responsive Design */
@media (max-width: 1000px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .tool-container {
        padding: 1rem;
    }
    
    .tool-main {
        padding: 1.5rem;
    }
    
    .tool-title-row {
        gap: 12px;
    }
    
    .tool-icon-wrapper {
        width: 48px;
        height: 48px;
    }
    
    .source-cards {
        grid-template-columns: 1fr;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .action-bar {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .browser-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .related-tools {
        flex-direction: column;
        text-align: center;
    }
    
    .related-links {
        justify-content: center;
    }
    
    .mode-tab span {
        display: none;
    }
}

@media (max-width: 480px) {
    .tool-title {
        font-size: 1.5rem;
    }
    
    .format-options,
    .quality-options {
        flex-direction: column;
    }
    
    .preview-actions {
        gap: 6px;
    }
    
    .btn-icon {
        width: 40px;
        height: 40px;
    }
    
    .history-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    
    .btn-stop {
        animation: none;
    }
    
    .timer-dot {
        animation: none;
    }
}