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

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e5e7eb;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 20px 25px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 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;
    --space-20: 5rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-medium: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

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

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: inherit;
    transition: var(--transition-medium);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: var(--space-2);
    margin-left: var(--space-4);
    padding-left: var(--space-4);
    border-left: 1px solid var(--border-color);
}

.language-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-3);
    border-radius: 6px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

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

.logo-img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    gap: var(--space-8);
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-medium);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    z-index: 1001;
    position: relative;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="%23000" opacity="0.02"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-20) var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    line-height: 1.7;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    animation: fadeInUp 1s ease-out 0.4s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: 12px;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

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

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

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Phone Mockup */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.6s both;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: #1f2937;
    border-radius: 40px;
    padding: 20px;
    position: relative;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    animation: float 6s ease-in-out infinite;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #ffffff;
    border-radius: 25px;
    overflow: hidden;
    position: relative;
}

.app-interface {
    padding: var(--space-6);
    height: 100%;
}

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

.app-title {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--primary-color);
}

.app-menu {
    width: 24px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 6px;
}

.book-preview {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: var(--space-6);
    height: 200px;
    position: relative;
}

.book-cover {
    width: 60px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 8px;
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-medium);
}

.book-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.text-line {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    animation: pulse 2s ease-in-out infinite;
}

.text-line:nth-child(2) {
    animation-delay: 0.3s;
}

.text-line:nth-child(3) {
    animation-delay: 0.6s;
}

.text-line:nth-child(4) {
    animation-delay: 0.9s;
}

.text-line.short {
    width: 60%;
}

.text-line.medium {
    width: 80%;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-book,
.floating-star,
.floating-circle {
    position: absolute;
    opacity: 0.1;
    animation: floatSlow 8s ease-in-out infinite;
}

.floating-book {
    width: 60px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 8px;
    top: 20%;
    left: -10%;
    animation-delay: 0s;
}

.floating-star {
    width: 40px;
    height: 40px;
    background: var(--secondary-color);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    top: 70%;
    right: -5%;
    animation-delay: 2s;
}

.floating-circle {
    width: 80px;
    height: 80px;
    background: var(--accent-color);
    border-radius: 50%;
    top: 10%;
    right: 10%;
    animation-delay: 4s;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 2px;
    height: 30px;
    background: var(--text-light);
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -4px;
    width: 10px;
    height: 10px;
    border-bottom: 2px solid var(--text-light);
    border-right: 2px solid var(--text-light);
    transform: rotate(45deg);
}

/* Features Section */
.features {
    padding: var(--space-20) 0;
    background: var(--bg-primary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    background: white;
    padding: var(--space-8);
    border-radius: 20px;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-medium);
}

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
    transition: var(--transition-medium);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* About Section */
.about {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-1);
}

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

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.reading-illustration {
    position: relative;
}

.book-stack {
    position: relative;
    width: 200px;
    height: 150px;
}

.book {
    position: absolute;
    width: 120px;
    height: 160px;
    border-radius: 8px;
    box-shadow: var(--shadow-medium);
}

.book-1 {
    background: var(--gradient-primary);
    transform: rotate(-10deg);
    z-index: 3;
}

.book-2 {
    background: var(--gradient-accent);
    transform: rotate(5deg) translate(20px, 10px);
    z-index: 2;
}

.book-3 {
    background: var(--secondary-color);
    transform: rotate(-5deg) translate(40px, 20px);
    z-index: 1;
}

.reading-progress {
    position: absolute;
    top: -20px;
    right: -40px;
    animation: float 4s ease-in-out infinite;
}

.progress-ring {
    position: relative;
    width: 100px;
    height: 100px;
}

.progress-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.progress-fill {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 71;
    animation: progressFill 3s ease-in-out infinite;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 700;
    color: var(--primary-color);
}

/* Download Section */
.download {
    padding: var(--space-20) 0;
    background: var(--bg-primary);
}

.download-content {
    text-align: center;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.download-btn {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5) var(--space-8);
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-medium);
    min-width: 180px;
}

.download-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.download-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.download-icon svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

.download-text {
    text-align: left;
}

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

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

/* Privacy Policy Styles */
.privacy-policy {
    padding-top: 100px;
    padding-bottom: var(--space-16);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    min-height: 100vh;
}

.privacy-header {
    text-align: center;
    margin-bottom: var(--space-16);
    padding-bottom: var(--space-12);
    border-bottom: 2px solid var(--border-color);
}

.privacy-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.privacy-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.effective-date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--bg-tertiary);
    padding: var(--space-3) var(--space-6);
    border-radius: 50px;
    border: 1px solid var(--border-color);
}

.date-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.date-value {
    font-weight: 600;
    color: var(--primary-color);
}

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

.privacy-intro {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-12);
    box-shadow: var(--shadow-medium);
}

.privacy-intro p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.privacy-section {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-medium);
    transition: var(--transition-medium);
}

.privacy-section:hover {
    box-shadow: var(--shadow-heavy);
    transform: translateY(-2px);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--bg-tertiary);
}

.section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.section-content {
    color: var(--text-secondary);
    line-height: 1.7;
}

.section-content > p {
    margin-bottom: var(--space-6);
}

.info-categories {
    display: grid;
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.info-card {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--bg-tertiary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-medium);
}

.info-card:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: 12px;
    flex-shrink: 0;
}

.info-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.info-content {
    flex: 1;
}

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

.info-description {
    color: var(--text-secondary);
    margin: 0;
}

.usage-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.usage-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.usage-list li::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
    margin-top: 2px;
}

.sharing-exceptions {
    margin-top: var(--space-6);
}

.exception-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.exception-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-color);
    border-radius: 8px;
    flex-shrink: 0;
}

.exception-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.protection-notice {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border: 1px solid #f59e0b;
    border-radius: 12px;
    margin-top: var(--space-4);
}

.notice-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f59e0b;
    border-radius: 12px;
    flex-shrink: 0;
}

.notice-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.notice-content {
    flex: 1;
}

.notice-content p {
    margin: 0;
    color: #92400e;
    font-weight: 500;
}

.rights-grid {
    display: grid;
    gap: var(--space-4);
    margin: var(--space-6) 0;
}

.right-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.right-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 8px;
    flex-shrink: 0;
}

.right-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.contact-info {
    margin-top: var(--space-6);
    padding: var(--space-6);
    background: var(--bg-tertiary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.contact-email {
    display: inline-block;
    margin-top: var(--space-3);
    padding: var(--space-3) var(--space-6);
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition-medium);
}

.contact-email:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.changes-notice {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border: 1px solid var(--primary-color);
    border-radius: 12px;
}

.changes-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: 12px;
    flex-shrink: 0;
}

.changes-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.changes-content {
    flex: 1;
}

.changes-content p {
    margin: 0;
    color: #1e40af;
    font-weight: 500;
}

.privacy-footer {
    text-align: center;
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 2px solid var(--border-color);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition-medium);
}

.back-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.back-link svg {
    width: 20px;
    height: 20px;
}

/* Footer link styles */
.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Mobile responsiveness for privacy policy */
@media (max-width: 768px) {
    .privacy-policy {
        padding-top: 80px;
    }
    
    .privacy-title {
        font-size: var(--font-size-3xl);
    }
    
    .privacy-section, .privacy-intro {
        padding: var(--space-6);
        margin-bottom: var(--space-6);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .info-card {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .info-icon {
        width: 40px;
        height: 40px;
    }
    
    .protection-notice, .changes-notice {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .notice-icon, .changes-icon {
        width: 40px;
        height: 40px;
    }
}

/* User Agreement Styles */
.user-agreement {
    padding-top: 100px;
    padding-bottom: var(--space-16);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    min-height: 100vh;
}

.agreement-header {
    text-align: center;
    margin-bottom: var(--space-16);
    padding-bottom: var(--space-12);
    border-bottom: 2px solid var(--border-color);
}

.agreement-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.agreement-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.agreement-intro {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-12);
    box-shadow: var(--shadow-medium);
}

.agreement-intro p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.agreement-section {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-medium);
    transition: var(--transition-medium);
}

.agreement-section:hover {
    box-shadow: var(--shadow-heavy);
    transform: translateY(-2px);
}

.provision-list {
    display: grid;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.provision-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.provision-number {
    font-weight: 600;
    color: var(--primary-color);
    flex-shrink: 0;
    min-width: 40px;
}

.provision-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

.features-grid {
    display: grid;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition-medium);
}

.feature-item:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: 8px;
    flex-shrink: 0;
}

.feature-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.responsibility-notice {
    padding: var(--space-6);
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border: 1px solid #f59e0b;
    border-radius: 12px;
    margin-top: var(--space-4);
}

.responsibility-notice .notice-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f59e0b;
    border-radius: 12px;
    flex-shrink: 0;
    margin-bottom: var(--space-4);
}

.responsibility-notice .notice-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.responsibility-notice h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: #92400e;
    margin-bottom: var(--space-4);
}

.restrictions-list {
    display: grid;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.restriction-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border: 1px solid #ef4444;
    border-radius: 8px;
}

.restriction-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ef4444;
    border-radius: 8px;
    flex-shrink: 0;
}

.restriction-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.restriction-item span {
    color: #991b1b;
    font-weight: 500;
}

.ip-notice {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    border: 1px solid #10b981;
    border-radius: 12px;
    margin-top: var(--space-4);
}

.ip-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #10b981;
    border-radius: 12px;
    flex-shrink: 0;
}

.ip-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.ip-content {
    flex: 1;
}

.ip-content p {
    margin: 0;
    color: #065f46;
    font-weight: 500;
}

.updates-notice {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-6);
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border: 1px solid var(--primary-color);
    border-radius: 12px;
    margin-top: var(--space-4);
}

.updates-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: 12px;
    flex-shrink: 0;
}

.updates-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.updates-content {
    flex: 1;
}

.updates-content p {
    margin: 0;
    color: #1e40af;
    font-weight: 500;
}

.agreement-footer {
    text-align: center;
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 2px solid var(--border-color);
}

/* Mobile responsiveness for user agreement */
@media (max-width: 768px) {
    .user-agreement {
        padding-top: 80px;
    }
    
    .agreement-title {
        font-size: var(--font-size-3xl);
    }
    
    .agreement-section, .agreement-intro {
        padding: var(--space-6);
        margin-bottom: var(--space-6);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .feature-item {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .responsibility-notice, .ip-notice, .updates-notice {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .notice-icon, .ip-icon, .updates-icon {
        width: 40px;
        height: 40px;
    }
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--space-12) 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.footer-logo .logo-text {
    color: white;
}

.footer-text {
    text-align: right;
}

.footer-text p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes floatSlow {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes progressFill {
    0% {
        stroke-dashoffset: 283;
    }
    50% {
        stroke-dashoffset: 71;
    }
    100% {
        stroke-dashoffset: 283;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--space-6);
        padding: var(--space-8);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-medium);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        font-size: var(--font-size-lg);
        font-weight: 500;
        padding: var(--space-3) var(--space-6);
        border-radius: 12px;
        transition: var(--transition-medium);
        width: 100%;
        text-align: center;
    }
    
    .nav-link:hover {
        background: var(--bg-tertiary);
        color: var(--primary-color);
    }
    
    .language-switcher {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-top: var(--space-4);
        justify-content: center;
        width: 100%;
    }
    
    .language-btn {
        flex: 1;
        max-width: 60px;
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hero Section Mobile */
    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }
    
    .hero-container {
        flex-direction: column;
        gap: var(--space-12);
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
        align-self: center;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
        line-height: 1.2;
        margin-bottom: var(--space-6);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-8);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-4);
        width: 100%;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: var(--space-4) var(--space-6);
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
        margin: 0 auto;
    }
    
    .floating-elements {
        display: none;
    }
    
    /* Features Section Mobile */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .feature-card {
        padding: var(--space-6);
    }
    
    /* About Section Mobile */
    .about-content {
        flex-direction: column;
        gap: var(--space-8);
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    /* Download Section Mobile */
    .download-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-4);
        width: 100%;
    }
    
    .download-btn {
        width: 100%;
        max-width: 280px;
    }
    
    /* Footer Mobile */
    .footer-content {
        flex-direction: column;
        gap: var(--space-6);
        text-align: center;
    }
    
    .footer-text {
        text-align: center;
    }
    
    .footer-text p {
        font-size: var(--font-size-sm);
        line-height: 1.6;
    }
}

/* Tablet Styles */
@media (max-width: 1024px) and (min-width: 769px) {
    .hero-container {
        gap: var(--space-8);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .phone-mockup {
        width: 280px;
        height: 560px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-8);
    }
    
    .download-buttons {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-4);
    }
    
    .download-btn {
        flex: 1;
        min-width: 200px;
        max-width: 250px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .nav-container {
        padding: 0 var(--space-4);
    }
    
    .hero {
        padding: 100px 0 40px;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
        line-height: 1.3;
    }
    
    .hero-subtitle {
        font-size: var(--font-size-sm);
        margin-bottom: var(--space-6);
    }
    
    .phone-mockup {
        width: 160px;
        height: 320px;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
        text-align: center;
    }
    
    .section-subtitle {
        font-size: var(--font-size-sm);
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .feature-card {
        padding: var(--space-5);
        text-align: center;
    }
    
    .feature-icon {
        width: 48px;
        height: 48px;
        margin: 0 auto var(--space-4);
    }
    
    .btn {
        font-size: var(--font-size-sm);
        padding: var(--space-3) var(--space-5);
    }
    
    .stats {
        text-align: center;
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    .download-btn {
        max-width: 100%;
        padding: var(--space-4);
    }
}