/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    --secondary-color: #00d4ff;
    --accent-color: #ff6b35;
    --success-color: #00c853;
    --warning-color: #ffab00;
    --error-color: #ff3d00;
    
    /* Dark Theme */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-card: #1e1e1e;
    --bg-hover: #2d2d2d;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #808080;
    --text-accent: #00d4ff;
    
    /* Border Colors */
    --border-primary: #333333;
    --border-secondary: #404040;
    --border-accent: #0066ff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    --gradient-secondary: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    --gradient-accent: linear-gradient(135deg, #ff6b35 0%, #ff8a50 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-accent);
    transform: translateY(-1px);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-brand .brand-text {
    transition: all var(--transition-normal);
    position: relative;
    cursor: pointer;
}

.nav-brand .brand-text:hover {
    color: var(--primary-color);
    text-shadow: 0 0 8px rgba(0, 102, 255, 0.5);
}

.nav-brand .brand-text::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-brand .brand-text:hover::after {
    width: 100%;
}

.nav-brand .brand-text.active {
    color: white;
    background: var(--primary-color);
    padding: 5px 10px;
    border-radius: var(--radius-md);
    text-shadow: none;
}

.nav-brand .brand-text.active::after {
    display: none;
}

.nav-brand i {
    width: 20px;
    height: 20px;
    transition: all var(--transition-normal);
}

.nav-brand .brand-text.active + i,
.nav-brand .brand-text.active ~ div i,
.nav-brand div:has(.brand-text.active) i {
    color: white;
}

/* Ensure icons in clickable divs are properly styled */
.nav-brand > div:has(.brand-text:not(.active)) i {
    color: var(--text-primary);
}

.nav-brand > div:has(.brand-text:not(.active)):hover i {
    color: var(--primary-color);
}

/* Ensure icons in active divs are white */
.nav-brand > div:has(.brand-text.active) i {
    color: white;
}

/* Application Switcher */
.app-switcher {
    margin-left: var(--spacing-md);
    position: relative;
    display: flex;
    align-items: center;
}

.brand-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.language-switcher {
    display: flex;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    border: 1px solid var(--border-primary);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.lang-btn:hover:not(.active) {
    color: var(--text-primary);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 107, 53, 0.2) 0%, transparent 50%);
    animation: particles-float 15s ease-in-out infinite;
}

@keyframes particles-float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(0, 102, 255, 0.2);
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

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

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-preview {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-primary);
    max-width: 500px;
    width: 100%;
}

.preview-header {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--border-primary);
}

.window-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control.close { background: #ff5f57; }
.control.minimize { background: #ffbd2e; }
.control.maximize { background: #28ca42; }

.preview-title {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.preview-content {
    padding: var(--spacing-md);
}

.preview-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-title {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-accent);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Tools Showcase Section */
.tools-showcase {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-primary);
}

.tools-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xxl);
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

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

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
    border-color: var(--border-accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.tool-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.tool-info h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.tool-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.tool-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tool-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.tool-feature i {
    color: var(--success-color);
    flex-shrink: 0;
}

.tool-preview {
    display: flex;
    justify-content: center;
}

.tool-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.tool-image:hover {
    transform: scale(1.03);
}

.tool-mockup {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.mockup-header {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    font-weight: 500;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-primary);
    font-size: 0.9rem;
}

.mockup-content {
    padding: var(--spacing-lg);
}

/* Mockup Content Styles */
.scan-result {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.port-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.port-item.open {
    background: rgba(0, 200, 83, 0.1);
    border: 1px solid rgba(0, 200, 83, 0.3);
}

.port-item.closed {
    background: rgba(255, 61, 0, 0.1);
    border: 1px solid rgba(255, 61, 0, 0.3);
}

.port-status {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.port-item.open .port-status {
    color: var(--success-color);
}

.port-item.closed .port-status {
    color: var(--error-color);
}

.dns-records {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.record-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    background: rgba(0, 102, 255, 0.05);
    border: 1px solid rgba(0, 102, 255, 0.1);
}

.record-type {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    flex-shrink: 0;
}

.record-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    word-break: break-all;
}

.traffic-chart {
    position: relative;
    height: 120px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.chart-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateY(-50%);
    animation: chart-pulse 2s ease-in-out infinite;
}

@keyframes chart-pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.chart-stats {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--primary-color);
}

.traffic-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.traffic-metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
}

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

.metric-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

/* Download Section */
.download {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-xxl);
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

.download-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    text-align: center;
}

.download-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.download-features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.version-info {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.version-info h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
    font-weight: 600;
}

.download-main .version-info {
    margin-top: var(--spacing-sm);
    width: 100%;
    max-width: 240px;
    padding: var(--spacing-xs);
}

.version-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-mono);
    margin-bottom: var(--spacing-xs);
}

.version-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.system-requirements,
.download-features {
    margin-bottom: var(--spacing-lg);
}

.system-requirements h4,
.download-features h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.system-requirements ul,
.download-features ul {
    list-style: none;
    padding: 0;
}

.system-requirements li,
.download-features li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

.system-requirements li::before,
.download-features li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.download-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}



.app-store-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.app-store-badge {
    margin-bottom: var(--spacing-md);
}

.feature-group {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
}

.feature-group h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
    font-weight: 600;
}

.feature-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-group li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.feature-group li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}



.store-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.store-feature i {
    color: var(--primary-color);
    flex-shrink: 0;
}

.tool-showcase-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.tool-showcase-images .tool-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.tool-showcase-images .tool-image:hover {
    transform: scale(1.05);
}

.download-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-primary);
}

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

.download-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.download-btn.secondary {
    background: var(--bg-card);
    color: var(--text-primary);
}

.download-btn.secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-accent);
    transform: translateY(-1px);
}

.download-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.download-btn.primary .download-icon {
    background: rgba(255, 255, 255, 0.2);
}

.download-info {
    flex: 1;
}

.download-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    display: block;
}

.download-size {
    font-size: 0.875rem;
    opacity: 0.8;
}

.download-alternatives {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Contact Section */


.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    border-top: 1px solid var(--border-primary);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-start;
    align-items: center;
}

.footer-brand .brand-icon {
    width: 40px;
    height: 40px;
}

.brand-info h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    text-align: center;
}

.brand-info p {
    color: var(--text-secondary);
    text-align: center;
}

.footer-links {
    display: none; /* Hidden as requested - menus removed */
}

.footer-contact {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-align: left;
}

.footer-contact .contact-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.footer-contact .contact-details h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.footer-contact .contact-details a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer-contact .contact-details a:hover {
    color: var(--primary-color);
}

.footer-column h4 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--border-primary);
    padding-top: var(--spacing-xl);
}

.footer-legal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-legal p {
    color: var(--text-muted);
    margin: 0;
}

.legal-links {
    display: flex;
    gap: var(--spacing-lg);
}

.legal-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
}

.legal-links a:hover {
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .tool-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .download-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .download-main {
        order: -1;
        margin-bottom: var(--spacing-xl);
    }
    
    .download-features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .download-main .version-info {
        max-width: 100%;
    }
    
    .contact-content {
        flex-direction: column;
        padding: 0 var(--spacing-md);
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .contact-item {
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }
    
    .contact-icon {
        width: 32px;
        height: 32px;
    }
    
    .contact-details h4 {
        font-size: 0.9rem;
    }
    
    .contact-details p {
        font-size: 0.8rem;
    }
    
    .contact-details a {
        font-size: 0.8rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .tools-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .footer-links {
        display: none; /* Hidden as requested */
    }
    
    .footer-main {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .footer-contact {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    
    .footer-contact .contact-item {
        justify-content: center;
        text-align: center;
    }
    
    .footer-legal {
        flex-direction: column;
        text-align: center;
    }
    
    /* Responsive app switcher for mobile */
    .nav-brand {
        flex-wrap: wrap;
    }
    
    .nav-brand > div {
        margin-bottom: var(--spacing-sm);
    }
    
    .nav-brand .brand-text {
        font-size: 1rem;
    }
    
    .nav-brand i {
        width: 16px;
        height: 16px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-xxl: 2rem;
    }
    
    .nav-container {
        padding: var(--spacing-md);
    }
    
    .hero-content {
        padding: 0 var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Further optimize app switcher for small screens */
    .nav-brand {
        gap: var(--spacing-xs);
    }
    
    .nav-brand .brand-text {
        font-size: 0.9rem;
        padding: 3px 6px;
    }
    
    .nav-brand i {
        width: 14px;
        height: 14px;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in 0.6s ease forwards;
}

@keyframes fade-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-30px);
    animation: slide-in-left 0.6s ease forwards;
}

@keyframes slide-in-left {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    opacity: 0;
    transform: translateX(30px);
    animation: slide-in-right 0.6s ease forwards;
}

@keyframes slide-in-right {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Language-specific styles */
html[lang="zh"] body {
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
}

html[lang="zh"] .privacy-section h2 {
    font-size: 1.5rem;
}

/* Privacy Policy */
.privacy-policy {
    padding: 100px 0 var(--spacing-xxl) 0;
    background: var(--bg-primary);
}

.privacy-content {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-section {
    margin-bottom: var(--spacing-xl);
}

.privacy-section h2 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.privacy-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.privacy-section ul {
    color: var(--text-secondary);
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.privacy-section li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.contact-info a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

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

/* Image Lightbox */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.lightbox-caption {
    color: white;
    margin-top: 1rem;
    font-size: 1rem;
    text-align: center;
    max-width: 80%;
}