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

:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #4caf50;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 8px;
    padding: 4px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.lang-btn {
    padding: 6px 12px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

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

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

.btn-secondary:hover {
    background: var(--bg-light);
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(180deg, #f7fafc 0%, #ffffff 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.mockup-window {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: white;
}

.mockup-header {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: #f5f5f5;
    border-bottom: 1px solid var(--border-color);
}

.mockup-buttons {
    display: flex;
    gap: 8px;
}

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

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28ca42; }

.mockup-title {
    flex: 1;
    text-align: center;
    font-size: 14px;
    color: var(--text-light);
}

.mockup-content {
    width: 100%;
    display: block;
}

/* Section Common Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.feature-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px;
    transition: all 0.3s;
}

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

.feature-icon {
    margin-bottom: 24px;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.feature-image {
    margin-bottom: 24px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-light);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    color: var(--text-secondary);
}

/* How It Works */
.how-it-works {
    background: var(--bg-light);
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.step {
    flex: 1;
    max-width: 300px;
    text-align: center;
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    font-size: 32px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
}

.step-arrow {
    font-size: 32px;
    color: var(--text-light);
}

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

.download-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    text-align: center;
    transition: all 0.3s;
}

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

.platform-icon {
    margin-bottom: 24px;
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 14px;
}

.version {
    padding: 4px 12px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.size {
    padding: 4px 12px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

/* Pricing Section */
.pricing {
    background: var(--bg-light);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    position: relative;
    transition: all 0.3s;
}

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

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: 32px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.currency {
    font-size: 24px;
    font-weight: 600;
}

.amount {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    font-size: 16px;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
}

/* FAQ Section */
.faq {
    background: var(--bg-white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    cursor: pointer;
    transition: color 0.2s;
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
}

.faq-icon {
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

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

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-bottom: 24px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 64px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    margin-bottom: 16px;
    font-size: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: white;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.2s;
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .download-cards {
        grid-template-columns: 1fr;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Share Code Page Styles */
.share-code-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    margin-top: 0;
}

.share-code-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" xmlns="http://www.w3.org/2000/svg"><path d="M0 0h60v60H0z" fill="none"/><path d="M30 0v60M0 30h60" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></svg>') repeat;
    opacity: 0.5;
}

.share-code-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: 60px 40px;
    max-width: 700px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.share-icon {
    margin: 0 auto 30px;
    display: flex;
    justify-content: center;
}

.share-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.2;
}

.share-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 30px;
}

.share-code-box {
    background: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 30px 0;
}

.share-link-container {
    display: flex;
    gap: 12px;
    align-items: stretch;
    width: 100%;
}

.share-link-input {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-primary);
    font-family: 'Monaco', 'Courier New', monospace;
    background: white;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    outline: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.share-link-input:hover {
    border-color: var(--primary-color);
}

.share-link-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.copy-link-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.copy-link-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.copy-link-btn:active {
    transform: translateY(0);
}

.copy-link-btn svg {
    flex-shrink: 0;
}

.share-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.share-step {
    flex: 1;
    min-width: 150px;
    max-width: 200px;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 15px;
}

.share-step p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.step-arrow {
    font-size: 1.5rem;
    color: var(--text-light);
    flex-shrink: 0;
}

.share-actions {
    margin-top: 40px;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.125rem;
    font-weight: 600;
}

.share-hint {
    margin-top: 20px;
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.5;
}

.share-platforms {
    margin-top: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 0.95rem;
}

.platform-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.separator {
    color: var(--border-color);
}

/* Responsive styles for share code page */
@media (max-width: 768px) {
    .share-code-content {
        padding: 40px 25px;
    }
    
    .share-title {
        font-size: 1.875rem;
    }
    
    .share-description {
        font-size: 1rem;
    }
    
    .share-link-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .share-link-input {
        font-size: 0.85rem;
        padding: 12px 14px;
    }
    
    .copy-link-btn {
        width: 100%;
        justify-content: center;
        padding: 12px 20px;
    }
    
    .share-steps {
        flex-direction: column;
        gap: 15px;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .btn-large {
        width: 100%;
        padding: 14px 30px;
    }
}