/* ========================================
   Uttero Website - CSS Styles
   Modern, Minimalist, Dark/Light Mode
   ======================================== */

/* ----------------------------------------
   CSS Custom Properties (Design Tokens)
   ---------------------------------------- */
:root {
    /* Colors - Light Mode */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f1f3f4;
    --color-text: #1a1a1a;
    --color-text-secondary: #5f6368;
    --color-text-tertiary: #80868b;
    --color-border: #e8eaed;
    --color-border-light: #f1f3f4;
    
    /* Accent Colors */
    --color-primary: #0066ff;
    --color-primary-hover: #0052cc;
    --color-primary-light: rgba(0, 102, 255, 0.1);
    --color-success: #00c853;
    --color-warning: #ff9800;
    --color-error: #ff3b30;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00c6ff 100%);
    --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(0, 102, 255, 0.15) 0%, transparent 50%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-Index */
    --z-navbar: 100;
    --z-modal: 200;
    --z-tooltip: 300;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #141414;
    --color-bg-tertiary: #1e1e1e;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #6b6b6b;
    --color-border: #2a2a2a;
    --color-border-light: #1e1e1e;
    
    --color-primary: #3d8bff;
    --color-primary-hover: #5a9fff;
    --color-primary-light: rgba(61, 139, 255, 0.15);
    
    --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(61, 139, 255, 0.2) 0%, transparent 50%);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-md);
}

/* Focus visible styles for keyboard users */
body:not(.using-mouse) *:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

body.using-mouse *:focus {
    outline: none;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

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

/* ----------------------------------------
   Theme Toggle Button
   ---------------------------------------- */
.theme-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-tooltip);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    transform: scale(1.05);
}

.theme-toggle .sun-icon {
    display: block;
}

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

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

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

/* ----------------------------------------
   Navigation
   ---------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navbar);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(10, 10, 10, 0.8);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.logo-icon {
    width: 32px;
    height: 32px;
}

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

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-text);
    color: var(--color-bg) !important;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-cta {
        width: 100%;
        text-align: center;
    }
}

/* ----------------------------------------
   Buttons
   ---------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

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

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

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    border-radius: var(--radius-xl);
}

.btn-meta {
    font-size: var(--font-size-xs);
    opacity: 0.7;
    margin-left: var(--spacing-sm);
}

/* ----------------------------------------
   Hero Section
   ---------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -100px;
    opacity: 0.15;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: #00c6ff;
    bottom: -100px;
    left: -100px;
    opacity: 0.1;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    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: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

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

.hero-meta {
    display: flex;
    gap: var(--spacing-xl);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Hero Visual / App Preview */
.hero-visual {
    position: relative;
    z-index: 1;
}

.app-preview {
    position: relative;
}

.app-window {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

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

.window-dots {
    display: flex;
    gap: var(--spacing-sm);
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.window-title {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.window-content {
    padding: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.waveform-demo {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 60px;
}

.wave-bar {
    width: 4px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
    animation-delay: calc(var(--delay) * 0.1s);
}

@keyframes wave {
    0%, 100% { height: 20px; }
    50% { height: 50px; }
}

.demo-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    text-align: center;
}

.typing-text {
    border-right: 2px solid var(--color-primary);
    animation: blink 0.7s step-end infinite;
}

@keyframes blink {
    50% { border-color: transparent; }
}

.keyboard-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: 0 2px 0 var(--color-border);
}

/* Hero Responsive */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-meta {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-visual {
        display: none;
    }
}

/* ----------------------------------------
   Trusted Section
   ---------------------------------------- */
.trusted {
    padding: var(--spacing-3xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.trusted-text {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-lg);
}

.trusted-icons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    flex-wrap: wrap;
}

.trusted-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.trusted-item svg {
    opacity: 0.6;
}

/* Stats Row */
.stats-row {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-light);
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

@media (max-width: 640px) {
    .stats-row {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

/* ----------------------------------------
   Section Styles
   ---------------------------------------- */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ----------------------------------------
   Features Section
   ---------------------------------------- */
.features {
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

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

.feature-highlight {
    grid-column: span 3;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* Features List */
.features-list {
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.features-list h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.features-list-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

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

.feature-list-item svg {
    color: var(--color-success);
    flex-shrink: 0;
}

@media (max-width: 968px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-highlight {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .features-list-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .features-list-grid {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   Demo Section
   ---------------------------------------- */
.demo-video {
    max-width: 900px;
    margin: 0 auto;
}

.video-wrapper {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.video-placeholder:hover .play-button {
    transform: scale(1.1);
}

.video-thumbnail {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: relative;
    z-index: 1;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border-radius: 50%;
    color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
}

.video-duration {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    z-index: 1;
}

.demo-chapters {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.demo-chapters h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.chapters-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.chapter-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: left;
    transition: all var(--transition-fast);
}

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

.chapter-time {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.chapter-title {
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

@media (max-width: 768px) {
    .chapters-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .chapters-list {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   Audience Section
   ---------------------------------------- */
.audience {
    background: var(--color-bg-secondary);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.audience-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.audience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.audience-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.audience-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.audience-card > p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.audience-benefits {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.audience-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) 0;
}

.audience-benefits li::before {
    content: "•";
    color: var(--color-primary);
    font-weight: bold;
}

@media (max-width: 968px) {
    .audience-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .audience-grid {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   Comparison Section
   ---------------------------------------- */
.comparison {
    padding: var(--spacing-4xl) 0;
}

.comparison-table {
    max-width: 700px;
    margin: 0 auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.comparison-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.comparison-header .comparison-cell {
    padding: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    border-bottom: 1px solid var(--color-border-light);
}

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

.comparison-cell {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
}

.comparison-cell:first-child {
    justify-content: flex-start;
    color: var(--color-text-secondary);
}

.comparison-cell.highlight {
    background: var(--color-primary-light);
}

.icon-yes {
    color: var(--color-success);
}

.icon-no {
    color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
    .comparison-cell {
        padding: var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

/* ----------------------------------------
   FAQ Section
   ---------------------------------------- */
.faq-grid {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: left;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

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

.faq-icon {
    transition: transform var(--transition-base);
    color: var(--color-text-secondary);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

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

/* ----------------------------------------
   Download Section
   ---------------------------------------- */
.download {
    background: var(--color-bg-secondary);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.download-info {
    padding-right: var(--spacing-xl);
}

.download-info .section-title {
    text-align: left;
    margin-bottom: var(--spacing-md);
}

.download-info > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.download-buttons {
    margin-bottom: var(--spacing-xl);
}

.download-btn {
    flex-direction: column;
    padding: var(--spacing-lg) var(--spacing-2xl);
}

.download-btn .btn-meta {
    margin-left: 0;
    margin-top: var(--spacing-xs);
}

.version-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.version-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.version-number {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.version-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.changelog-link {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 500;
}

.changelog-link:hover {
    text-decoration: underline;
}

/* Download Requirements */
.download-requirements {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.download-requirements h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.download-requirements ul {
    margin-bottom: var(--spacing-xl);
}

.download-requirements li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.download-requirements li svg {
    color: var(--color-success);
    flex-shrink: 0;
}

.install-steps ol {
    counter-reset: step;
}

.install-steps li {
    counter-increment: step;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.install-steps li::before {
    content: counter(step);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: 50%;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .download-content {
        grid-template-columns: 1fr;
    }
    
    .download-info {
        padding-right: 0;
        text-align: center;
    }
    
    .download-info .section-title {
        text-align: center;
    }
    
    .version-info {
        justify-content: center;
    }
}

/* ----------------------------------------
   Testimonials Section
   ---------------------------------------- */
.testimonials {
    background: var(--color-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.testimonial-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.testimonial-text {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.testimonial-text::before {
    content: '"';
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 0;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.testimonial-author .author-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    font-size: var(--font-size-sm);
    border-radius: 50%;
}

.testimonial-author .author-info {
    display: flex;
    flex-direction: column;
}

.testimonial-author cite {
    font-style: normal;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.testimonial-author span {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

@media (max-width: 968px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   Final CTA Section
   ---------------------------------------- */
.final-cta {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.final-cta .btn-primary {
    background: white;
    color: var(--color-primary);
}

.final-cta .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

/* ----------------------------------------
   Contact Section
   ---------------------------------------- */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-info h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.contact-info > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.contact-method:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    color: var(--color-primary);
}

.contact-details {
    display: flex;
    flex-direction: column;
}

.contact-details strong {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.contact-details span {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Author Card */
.author-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
}

.author-avatar {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg);
}

.author-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.author-card > p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.author-bio {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   Footer
   ---------------------------------------- */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-brand > p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-column a {
    display: block;
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer-made {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        margin-bottom: var(--spacing-xl);
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ----------------------------------------
   Animations
   ---------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Scroll animations will be handled by JS */
[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animate {
    opacity: 1;
    transform: translateY(0);
}

/* ----------------------------------------
   Utilities
   ---------------------------------------- */
.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;
}

/* ----------------------------------------
   Legal Pages (Privacy, Terms)
   ---------------------------------------- */
.legal-page {
    padding-top: 120px;
    padding-bottom: var(--spacing-4xl);
    min-height: 100vh;
}

.legal-page h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.legal-updated {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-3xl);
}

.legal-section {
    margin-bottom: var(--spacing-2xl);
}

.legal-section h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.legal-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.legal-section p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.legal-section ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.legal-section li {
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) 0;
    list-style: disc;
}

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

.legal-section a:hover {
    text-decoration: underline;
}

/* Print Styles */
@media print {
    .navbar,
    .theme-toggle,
    .hero-visual,
    .demo-video {
        display: none;
    }
    
    body {
        color: black;
        background: white;
    }
}