/**
 * FaviconForge Pro - Stylesheet
 * Design: Modern Glassmorphism with Mesh Gradients
 * Author: Professional Favicon Generator
 */

/* ===================================
   CSS Variables & Theme
   =================================== */
:root {
    /* Colors */
    --primary-50: #EEF2FF;
    --primary-100: #E0E7FF;
    --primary-200: #C7D2FE;
    --primary-300: #A5B4FC;
    --primary-400: #818CF8;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --primary-900: #312E81;
    
    --accent-400: #A78BFA;
    --accent-500: #8B5CF6;
    --accent-600: #7C3AED;
    
    --success-400: #4ADE80;
    --success-500: #22C55E;
    --success-600: #16A34A;
    
    --warning-400: #FBBF24;
    --warning-500: #F59E0B;
    
    --error-400: #F87171;
    --error-500: #EF4444;
    --error-600: #DC2626;
    
    /* Light Theme */
    --bg-primary: #F8FAFC;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F1F5F9;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #94A3B8;
    --border-color: rgba(148, 163, 184, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow-color: rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #A78BFA 100%);
    --gradient-mesh: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(167, 139, 250, 0.1) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(99, 102, 241, 0.08) 0px, transparent 50%);
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-tertiary: #64748B;
    --border-color: rgba(148, 163, 184, 0.15);
    --glass-bg: rgba(30, 41, 59, 0.8);
    --glass-border: rgba(71, 85, 105, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --gradient-mesh: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.2) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(167, 139, 250, 0.1) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(99, 102, 241, 0.08) 0px, transparent 50%);
}

/* ===================================
   Reset & Base
   =================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* ===================================
   Background Effects
   =================================== */
.bg-gradient {
    position: fixed;
    inset: 0;
    background: var(--gradient-mesh);
    pointer-events: none;
    z-index: -2;
}

.bg-mesh {
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366f1' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
}

/* ===================================
   Container
   =================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ===================================
   Header
   =================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 44px;
    height: 44px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-pro {
    font-weight: 800;
    opacity: 0.9;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--primary-100);
    color: var(--primary-600);
    transform: rotate(15deg);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--accent-400);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    transition: transform var(--transition-base);
}

.theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: block;
}

/* ===================================
   Main Content
   =================================== */
.main {
    padding: var(--space-12) 0 var(--space-16);
    min-height: calc(100vh - 140px);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    text-align: center;
    margin-bottom: var(--space-12);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===================================
   Glass Card
   =================================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 30px 60px -12px var(--shadow-color);
}

/* ===================================
   App Container
   =================================== */
.app-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* ===================================
   Upload Section
   =================================== */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-12) var(--space-8);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: linear-gradient(135deg, transparent 0%, rgba(99, 102, 241, 0.02) 100%);
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--primary-400);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.upload-zone.drag-over {
    transform: scale(1.02);
}

.upload-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    color: var(--primary-400);
}

.upload-icon svg {
    width: 100%;
    height: 100%;
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.upload-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.upload-formats {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.format-badge {
    padding: var(--space-1) var(--space-3);
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

[data-theme="dark"] .format-badge {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-300);
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Preview Container */
.preview-container {
    margin-top: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-color);
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.preview-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--error-100, #FEE2E2);
    color: var(--error-500);
}

[data-theme="dark"] .btn-icon:hover {
    background: rgba(239, 68, 68, 0.2);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
}

.preview-image-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

#previewImage {
    max-width: 256px;
    max-height: 256px;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px -10px var(--shadow-color);
    background-image: linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
                      linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
                      linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
                      linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

[data-theme="dark"] #previewImage {
    background-image: linear-gradient(45deg, #374151 25%, transparent 25%),
                      linear-gradient(-45deg, #374151 25%, transparent 25%),
                      linear-gradient(45deg, transparent 75%, #374151 75%),
                      linear-gradient(-45deg, transparent 75%, #374151 75%);
}

.image-info {
    display: flex;
    gap: var(--space-4);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.image-info span {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ===================================
   Options Section
   =================================== */
.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-8);
}

.section-title svg {
    width: 24px;
    height: 24px;
    color: var(--primary-500);
}

.option-group {
    margin-bottom: var(--space-8);
}

.option-group:last-child {
    margin-bottom: 0;
}

.option-group-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.option-group-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* Platform Grid */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-4);
}

.platform-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
}

.platform-card:hover {
    border-color: var(--primary-300);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, transparent 100%);
}

.platform-card:has(input:checked) {
    border-color: var(--primary-500);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.platform-card input {
    display: none;
}

.platform-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.platform-card:has(input:checked) .platform-icon {
    background: var(--primary-100);
    color: var(--primary-600);
}

[data-theme="dark"] .platform-card:has(input:checked) .platform-icon {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-400);
}

.platform-icon svg {
    width: 28px;
    height: 28px;
}

.platform-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.platform-name {
    font-weight: 600;
    color: var(--text-primary);
}

.platform-desc {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.platform-check {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    color: transparent;
    transition: all var(--transition-base);
}

.platform-card:has(input:checked) .platform-check {
    background: var(--primary-500);
    color: white;
}

.platform-check svg {
    width: 14px;
    height: 14px;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.option-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.option-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.tooltip {
    display: inline-flex;
    position: relative;
    cursor: help;
}

.tooltip svg {
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
}

.tooltip::after {
    content: attr(data-tip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 400;
    white-space: nowrap;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px var(--shadow-color);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 10;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

.option-control {
    display: flex;
    align-items: center;
}

/* Toggle Group */
.toggle-group {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-1);
    gap: var(--space-1);
}

.toggle-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle-btn:hover {
    color: var(--text-primary);
}

.toggle-btn.active {
    background: var(--bg-secondary);
    color: var(--primary-600);
    box-shadow: 0 2px 8px var(--shadow-color);
}

[data-theme="dark"] .toggle-btn.active {
    color: var(--primary-400);
}

.toggle-btn svg {
    width: 16px;
    height: 16px;
}

/* Color Picker */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.color-input {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 0;
    background: none;
}

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

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

.color-text {
    width: 80px;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    text-transform: uppercase;
}

.color-text:focus {
    outline: none;
    border-color: var(--primary-400);
}

/* Range Slider */
.range-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex: 1;
}

.range-input {
    flex: 1;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    background: var(--primary-500);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
    transition: transform var(--transition-fast);
}

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

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--primary-500);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.range-value {
    min-width: 48px;
    padding: var(--space-1) var(--space-2);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-600);
    text-align: center;
}

[data-theme="dark"] .range-value {
    color: var(--primary-400);
}

/* Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.switch-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: transform var(--transition-base);
}

.switch input:checked + .switch-slider {
    background: var(--primary-500);
}

.switch input:checked + .switch-slider::before {
    transform: translateX(24px);
}

/* ===================================
   Preview Section
   =================================== */
.preview-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    padding: var(--space-1);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow-x: auto;
}

.preview-tab {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.preview-tab:hover {
    color: var(--text-primary);
}

.preview-tab.active {
    background: var(--bg-secondary);
    color: var(--primary-600);
    box-shadow: 0 2px 8px var(--shadow-color);
}

[data-theme="dark"] .preview-tab.active {
    color: var(--primary-400);
}

.preview-tab svg {
    width: 18px;
    height: 18px;
}

.preview-content {
    min-height: 300px;
}

.preview-panel {
    display: none;
    animation: fadeIn var(--transition-base);
}

.preview-panel.active {
    display: block;
}

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

/* Browser Mockup */
.browser-mockup {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 10px 40px -10px var(--shadow-color);
    max-width: 600px;
    margin: 0 auto;
}

.browser-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.browser-dots {
    display: flex;
    gap: var(--space-2);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
}

.dot.red { background: #EF4444; }
.dot.yellow { background: #F59E0B; }
.dot.green { background: #22C55E; }

.browser-tabs {
    flex: 1;
    display: flex;
}

.browser-tab {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.tab-favicon {
    width: 16px;
    height: 16px;
    border-radius: 2px;
}

.browser-address {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.address-bar {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.address-bar svg {
    width: 14px;
    height: 14px;
    color: var(--success-500);
}

.browser-content {
    padding: var(--space-8);
}

.content-placeholder {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.placeholder-line {
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.placeholder-line.w-60 { width: 60%; }
.placeholder-line.w-80 { width: 80%; }
.placeholder-line.w-40 { width: 40%; }

/* Mobile Mockup */
.mobile-devices {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    flex-wrap: wrap;
}

.mobile-mockup {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.mobile-screen {
    width: 160px;
    height: 280px;
    background: var(--bg-secondary);
    border: 3px solid var(--text-tertiary);
    border-radius: 24px;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 40px -10px var(--shadow-color);
}

.mobile-statusbar {
    height: 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-4);
}

.mobile-notch {
    width: 60px;
    height: 24px;
    background: var(--text-tertiary);
    border-radius: 0 0 12px 12px;
    margin: 0 auto var(--space-4);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.app-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.app-icon img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.app-icon span {
    font-size: 0.625rem;
    color: var(--text-secondary);
    text-align: center;
}

.app-icon.placeholder {
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.device-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* PWA Mockup */
.pwa-mockup {
    max-width: 320px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: 0 10px 40px -10px var(--shadow-color);
}

.pwa-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.preview-pwa-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
}

.pwa-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.pwa-name {
    font-weight: 600;
    color: var(--text-primary);
}

.pwa-url {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.pwa-splash {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-8);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.preview-pwa-splash {
    width: 128px;
    height: 128px;
    border-radius: var(--radius-xl);
}

.splash-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===================================
   Generate Section
   =================================== */
.generate-section {
    display: flex;
    justify-content: center;
    margin: var(--space-4) 0;
}

.btn-generate {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-10);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 10px 30px -5px rgba(99, 102, 241, 0.5);
}

.btn-generate:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px -5px rgba(99, 102, 241, 0.6);
}

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

.btn-generate svg {
    width: 24px;
    height: 24px;
}

.btn-generate .btn-icon-loading {
    display: none;
    animation: spin 1s linear infinite;
}

.btn-generate.loading .btn-icon-default {
    display: none;
}

.btn-generate.loading .btn-icon-loading {
    display: block;
}

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

/* ===================================
   Progress Section
   =================================== */
.progress-section {
    text-align: center;
}

.progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.progress-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.progress-percent {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-500);
}

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

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

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

/* ===================================
   Results Section
   =================================== */
.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.results-header .section-title {
    margin-bottom: 0;
}

.btn-download-all {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    background: var(--success-500);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-download-all:hover {
    background: var(--success-600);
    transform: translateY(-1px);
}

.btn-download-all svg {
    width: 18px;
    height: 18px;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.result-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.result-item:hover {
    border-color: var(--primary-300);
    transform: translateY(-2px);
}

.result-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
                      linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
                      linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
                      linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

[data-theme="dark"] .result-icon {
    background-image: linear-gradient(45deg, #374151 25%, transparent 25%),
                      linear-gradient(-45deg, #374151 25%, transparent 25%),
                      linear-gradient(45deg, transparent 75%, #374151 75%),
                      linear-gradient(-45deg, transparent 75%, #374151 75%);
}

.result-icon img {
    max-width: 100%;
    max-height: 100%;
}

.result-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.result-size {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.result-type {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-download {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary-100);
    border: none;
    border-radius: var(--radius-md);
    color: var(--primary-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.result-download:hover {
    background: var(--primary-500);
    color: white;
}

[data-theme="dark"] .result-download {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-400);
}

[data-theme="dark"] .result-download:hover {
    background: var(--primary-500);
    color: white;
}

.result-download svg {
    width: 16px;
    height: 16px;
}

/* Code Section */
.code-section {
    margin-bottom: var(--space-6);
}

.code-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.code-title svg {
    width: 18px;
    height: 18px;
    color: var(--primary-500);
}

.code-block {
    position: relative;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.code-block pre {
    padding: var(--space-5);
    overflow-x: auto;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-all;
}

.btn-copy {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-copy:hover {
    border-color: var(--primary-400);
    color: var(--primary-500);
}

.btn-copy svg {
    width: 16px;
    height: 16px;
}

.btn-new {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-new:hover {
    border-color: var(--primary-400);
    color: var(--primary-500);
    background: rgba(99, 102, 241, 0.05);
}

.btn-new svg {
    width: 20px;
    height: 20px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--space-8) 0;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ===================================
   Toast Notification
   =================================== */
.toast {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: var(--success-400);
}

.toast.error {
    border-color: var(--error-400);
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast.success .toast-icon {
    background: var(--success-100, #DCFCE7);
    color: var(--success-600);
}

.toast.error .toast-icon {
    background: var(--error-100, #FEE2E2);
    color: var(--error-600);
}

.toast-message {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .header .container {
        height: 60px;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .hero {
        margin-bottom: var(--space-8);
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .glass-card {
        padding: var(--space-5);
    }
    
    .upload-zone {
        padding: var(--space-8) var(--space-4);
    }
    
    .upload-icon {
        width: 60px;
        height: 60px;
    }
    
    .upload-title {
        font-size: 1.25rem;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .toggle-group {
        flex-direction: column;
    }
    
    .toggle-btn {
        justify-content: center;
    }
    
    .preview-tabs {
        flex-wrap: wrap;
    }
    
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-download-all {
        justify-content: center;
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-devices {
        flex-direction: column;
        align-items: center;
    }
    
    .toast {
        left: var(--space-4);
        right: var(--space-4);
        bottom: var(--space-4);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .btn-generate {
        width: 100%;
        padding: var(--space-4) var(--space-6);
        font-size: 1rem;
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }
    
    .result-item {
        padding: var(--space-3);
    }
    
    .result-icon {
        width: 48px;
        height: 48px;
    }
}

/* ===================================
   Utility Classes
   =================================== */
[hidden] {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}