/* ============================================
   ICNS to ICO Converter - Modern Stylesheet
   Dark Mode Support with Light Mode Default
   Color Theme: Blue (#3399cc)
   ============================================ */

/* CSS Variables - Light Mode (Default) */
:root {
    --transition-speed: 0.25s;
    
    /* Primary Colors - Blue Theme */
    --primary: #3399cc;
    --primary-light: #E6F4FA;
    --primary-dark: #2d87b8;
    --accent: #5AC8FA;
    
    /* Windows Colors */
    --win-blue: #3399cc;
    --win-purple: #8764B8;
    --win-green: #107C10;
    --win-orange: #FF8C00;
    --win-pink: #E3008C;
    --win-cyan: #00B7C3;
    
    /* Status Colors */
    --success: #339966;
    --success-light: #E8F5E9;
    --warning: #f59e0b;
    --warning-light: #FEF3C7;
    --danger: #e64e4e;
    --danger-light: #FEE2E2;
    
    /* Background Colors */
    --bg: #F0F8FF;
    --bg-elevated: #ffffff;
    --bg-secondary: #F1F5F9;
    --bg-tertiary: #E2E8F0;
    
    /* Text Colors */
    --text: #1E293B;
    --text-secondary: #475569;
    --text-muted: #64748B;
    
    /* Border Colors */
    --border: #B8E0F0;
    --border-light: #E2E8F0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --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);
    --shadow-primary: 0 4px 14px rgba(51, 153, 204, 0.25);
    --shadow-primary-hover: 0 6px 20px rgba(51, 153, 204, 0.35);
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Input */
    --input-bg: #ffffff;
    --input-border: #B8E0F0;
    
    /* Windows mockups */
    --taskbar-bg: #1E293B;
    --taskbar-item-bg: rgba(255, 255, 255, 0.1);
    --desktop-bg: #F1F5F9;
    
    /* Scrollbar */
    --scrollbar-track: var(--bg);
    --scrollbar-thumb: var(--text-muted);
    --scrollbar-thumb-hover: var(--text-secondary);
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --primary: #5AC8FA;
    --primary-light: rgba(90, 200, 250, 0.15);
    --primary-dark: #4AB8EA;
    --accent: #7DD3FC;
    
    /* Windows Colors - Adjusted for dark */
    --win-blue: #5AC8FA;
    --win-purple: #BF5AF2;
    --win-green: #30D158;
    --win-orange: #FF9F0A;
    --win-pink: #FF375F;
    --win-cyan: #64D2FF;
    
    /* Status Colors */
    --success: #4ade80;
    --success-light: rgba(74, 222, 128, 0.15);
    --warning: #fbbf24;
    --warning-light: rgba(251, 191, 36, 0.15);
    --danger: #f87171;
    --danger-light: rgba(248, 113, 113, 0.15);
    
    /* Background Colors */
    --bg: #0F172A;
    --bg-elevated: #1E293B;
    --bg-secondary: #334155;
    --bg-tertiary: #475569;
    
    /* Text Colors */
    --text: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    
    /* Border Colors */
    --border: #334155;
    --border-light: #475569;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 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);
    --shadow-primary: 0 4px 14px rgba(90, 200, 250, 0.2);
    --shadow-primary-hover: 0 6px 20px rgba(90, 200, 250, 0.3);
    
    /* Input */
    --input-bg: #334155;
    --input-border: #475569;
    
    /* Windows mockups */
    --taskbar-bg: #0F172A;
    --taskbar-item-bg: rgba(255, 255, 255, 0.15);
    --desktop-bg: #1E293B;
    
    /* Scrollbar */
    --scrollbar-track: var(--bg-elevated);
    --scrollbar-thumb: var(--text-muted);
    --scrollbar-thumb-hover: var(--text-secondary);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* 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-primary);
    flex-shrink: 0;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.tool-icon-wrapper.win-theme {
    background: var(--primary);
}

.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;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.tool-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.tool-description a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.tool-description a:hover {
    text-decoration: underline;
}

/* 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);
    margin-bottom: 2rem;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

/* 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: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-light);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary);
    background: var(--bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-area:hover::before,
.upload-area.drag-over::before {
    opacity: 0.5;
}

.upload-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 1rem;
    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 1rem;
    font-size: 1rem;
}

.upload-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    box-shadow: var(--shadow-primary-hover);
    transform: translateY(-2px);
}

.btn-primary:disabled {
    background: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.6;
}

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

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

.btn-browse {
    margin-top: 0.5rem;
}

/* Editor Section */
.editor-section {
    background: var(--bg-elevated);
    animation: fadeIn 0.4s ease;
    transition: background-color var(--transition-speed);
}

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

/* Preview Panel */
.preview-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 1.5rem;
    margin-top: 0;
    transition: background-color var(--transition-speed);
}

.panel-header {
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.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);
}

.panel-header .file-info {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 0.35rem 0.85rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-speed);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
}

.preview-card {
    text-align: center;
}

.preview-mock {
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    padding: 1rem;
    margin-bottom: 0.75rem;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

/* Windows Taskbar Preview */
.taskbar-window {
    width: 100%;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    transition: background-color var(--transition-speed);
}

.taskbar-bar {
    background: var(--taskbar-bg);
    padding: 0.5rem;
    transition: background-color var(--transition-speed);
}

.taskbar-items {
    display: flex;
    justify-content: center;
    gap: 0.35rem;
}

.taskbar-item {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.taskbar-item.placeholder {
    background: var(--taskbar-item-bg);
}

.taskbar-item.active {
    background: var(--primary-light);
}

.taskbar-item img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

/* Desktop Icon Preview */
.desktop-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
}

.desktop-item img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.desktop-item span {
    font-size: 0.75rem;
    color: var(--text);
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* Source Info Preview */
.source-info {
    flex-direction: column;
    padding: 1.25rem;
}

.source-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.source-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text);
}

.source-item svg,
.source-item i {
    color: var(--primary);
}

.source-item strong {
    color: var(--primary);
}

.preview-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    padding: 0 1.5rem 1.5rem;
}

.option-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: background-color var(--transition-speed);
}

.option-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--text);
}

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

.option-header h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

/* Preset Buttons */
.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.preset-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--bg-elevated);
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

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

/* Size Checkboxes */
.size-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.size-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    color: var(--text);
}

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

.size-checkbox input {
    display: none;
}

.size-checkbox input:checked + .checkbox-mark + span {
    color: var(--primary);
    font-weight: 600;
}

.size-checkbox input:checked ~ span:last-child {
    color: var(--primary);
    font-weight: 600;
}

.checkbox-mark {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    position: relative;
}

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

.checkbox-mark::after {
    content: '';
    position: absolute;
    display: none;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    left: 4px;
    top: 1px;
}

.size-checkbox input:checked + .checkbox-mark::after {
    display: block;
}

.size-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 0.5rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-speed);
}

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

/* Checkbox Options */
.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
    margin-bottom: 0.5rem;
}

.checkbox-option:hover {
    background: var(--bg-elevated);
}

.checkbox-option input {
    display: none;
}

.checkbox-option .checkbox-mark {
    width: 18px;
    height: 18px;
}

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

.checkbox-option input:checked + .checkbox-mark::after {
    display: block;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text);
}

.checkbox-label svg,
.checkbox-label i {
    color: var(--text-muted);
    width: 16px;
    height: 16px;
}

/* Radio Options */
.radio-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.radio-option:hover {
    background: var(--bg-tertiary);
}

.radio-option input {
    display: none;
}

.radio-mark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: 50%;
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
    transition: border-color 0.2s ease;
}

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

.radio-option input:checked + .radio-mark::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.radio-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.radio-label strong {
    color: var(--text);
    font-size: 0.95rem;
}

.radio-label small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Enhancement Options */
.enhancement-options,
.win-options {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Color Depth Select */
.color-depth-select {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.color-depth-select label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.color-depth-select select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--input-bg);
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.color-depth-select select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Select Option (generic) */
.select-option {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.select-option label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.select-option select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--input-bg);
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

[data-theme="dark"] .select-option select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

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

.select-option select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Debug Option */
.debug-option {
    padding: 0.75rem 1.5rem;
    background: var(--warning-light);
    border-top: 1px solid var(--border);
}

[data-theme="dark"] .debug-option {
    background: rgba(251, 191, 36, 0.1);
}

/* Action Bar */
.action-bar {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    justify-content: center;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

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

.progress-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Results Section - PRESERVED ORIGINAL STYLING */
.results-section {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(52, 199, 89, 0.08), rgba(52, 199, 89, 0.02));
    animation: fadeIn 0.4s ease;
}

[data-theme="dark"] .results-section {
    background: linear-gradient(135deg, rgba(52, 199, 89, 0.15), rgba(52, 199, 89, 0.05));
}

.result-success {
    margin-bottom: 1.5rem;
}

.result-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #34C759;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
}

.result-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 0.35rem;
}

.result-subtitle {
    color: var(--text-muted);
    margin: 0;
}

.download-btn {
    background: linear-gradient(135deg, #34C759, #2FB84E);
    color: white;
    padding: 14px 32px;
    border-radius: 980px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(52, 199, 89, 0.3);
    transition: all 0.3s ease;
    margin-bottom: 1.25rem;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 199, 89, 0.4);
}

.result-details {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .result-details {
    border-top-color: rgba(255, 255, 255, 0.1);
}

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

.result-detail span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.result-detail strong {
    font-size: 1rem;
    color: var(--text);
}

/* Error Message */
.error-message {
    background: var(--danger-light);
    color: var(--danger);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.5rem;
}

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

.related-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
}

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

.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 0.85rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

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

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

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

.info-card {
    padding: 2rem 0;
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 1.5rem;
}

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

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

.steps-list li {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 1.25rem;
    counter-increment: step;
    line-height: 1.6;
    color: var(--text-secondary);
}

.steps-list li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.steps-list li:last-child {
    margin-bottom: 0;
}

.steps-list li b,
.steps-list li strong {
    color: var(--text);
}

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

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

/* Tips Grid */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.tip-item {
    display: flex;
    gap: 1rem;
}

.tip-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
}

.tip-icon.win-blue {
    background: var(--win-blue);
}

.tip-icon.win-purple {
    background: var(--win-purple);
}

.tip-icon.win-green {
    background: var(--win-green);
}

.tip-icon.win-orange {
    background: var(--win-orange);
}

.tip-content h4 {
    font-size: 1rem;
    color: var(--text);
    margin: 0 0 0.35rem;
}

.tip-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.tip-content a {
    color: var(--primary);
    text-decoration: none;
}

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

/* Comparison Table */
.comparison-table {
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: border-color var(--transition-speed);
}

.comparison-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
}

.comparison-row.header {
    background: var(--bg-secondary);
    font-weight: 600;
}

.comparison-row:not(.header):nth-child(odd) {
    background: var(--primary-light);
}

.comparison-row:not(.header):nth-child(even) {
    background: var(--bg-elevated);
}

.comparison-cell {
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.comparison-row:last-child .comparison-cell {
    border-bottom: none;
}

.comparison-cell.icns {
    text-align: center;
    color: var(--primary);
}

.comparison-cell.ico {
    text-align: center;
    color: var(--win-orange);
}

.comparison-row.header .comparison-cell.icns,
.comparison-row.header .comparison-cell.ico {
    color: var(--text);
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text);
    text-align: left;
    transition: all 0.2s ease;
}

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

.faq-question svg,
.faq-question i {
    flex-shrink: 0;
    color: var(--primary);
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 1rem 1.25rem;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .tool-container {
        padding: 1rem;
    }
    
    .tool-title-row {
        gap: 0.75rem;
    }
    
    .tool-icon-wrapper {
        width: 50px;
        height: 50px;
    }
    
    .tool-icon-wrapper svg,
    .tool-icon-wrapper i {
        width: 24px;
        height: 24px;
    }
    
    .upload-section {
        padding: 2rem 1.5rem;
    }
    
    .upload-area {
        padding: 2.5rem 1.5rem;
    }
    
    .preview-panel {
        margin: 1rem;
        padding: 1rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        padding: 0 1rem 1rem;
    }
    
    .action-bar {
        flex-direction: column;
        padding: 1.25rem;
    }
    
    .action-bar .btn {
        width: 100%;
    }
    
    .related-tools {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .result-details {
        flex-direction: column;
        gap: 1rem;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .tip-item {
        flex-direction: column;
        text-align: center;
    }
    
    .tip-icon {
        margin: 0 auto;
    }
    
    .comparison-row {
        grid-template-columns: 1fr;
    }
    
    .comparison-cell {
        text-align: left !important;
    }
    
    .comparison-row.header {
        display: none;
    }
    
    .comparison-cell::before {
        font-weight: 600;
        display: block;
        margin-bottom: 0.35rem;
    }
    
    .comparison-cell.icns::before {
        content: 'ICNS (macOS): ';
    }
    
    .comparison-cell.ico::before {
        content: 'ICO (Windows): ';
    }
    
    .info-card {
        padding: 1.5rem 0;
    }
}

@media (max-width: 480px) {
    .tool-title-row {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .preset-buttons {
        flex-direction: column;
    }
    
    .preset-btn {
        width: 100%;
        justify-content: center;
    }
    
    .size-checkboxes {
        flex-direction: column;
    }
    
    .size-checkbox {
        width: 100%;
        justify-content: flex-start;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* Selection */
::selection {
    background: rgba(51, 153, 204, 0.2);
    color: var(--text);
}

[data-theme="dark"] ::selection {
    background: rgba(90, 200, 250, 0.3);
}

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