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

:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --success-color: #34C759;
    --bg-light: #F5F5F7;
    --bg-white: #FFFFFF;
    --text-dark: #1D1D1F;
    --text-gray: #6E6E73;
    --border-color: #D2D2D7;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background-color: var(--bg-white);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

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

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.download-btn {
    display: inline-block;
    background: white;
    color: var(--secondary-color);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 2rem;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.app-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    font-size: 1rem;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg-light);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.feature p {
    color: var(--text-gray);
    font-size: 0.95rem;
}

/* Privacy Section */
.privacy {
    padding: 80px 0;
    background: var(--bg-white);
}

.privacy h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.privacy-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    margin-bottom: 3rem;
}

.privacy-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.privacy-hero h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.privacy-hero p {
    font-size: 1.2rem;
    opacity: 0.95;
}

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

.privacy-details h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.privacy-details p {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.privacy-details ul {
    list-style: none;
    margin-bottom: 2rem;
}

.privacy-details li {
    color: var(--text-gray);
    padding: 0.5rem 0;
    font-size: 1rem;
}

/* Terms Section */
.terms {
    padding: 80px 0;
    background: var(--bg-light);
}

.terms h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

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

.terms-content h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.terms-content p {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.terms-content ul {
    color: var(--text-gray);
    margin-left: 2rem;
    margin-bottom: 1rem;
}

/* Support Section */
.support {
    padding: 80px 0;
    background: var(--bg-white);
}

.support h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.support-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.support-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.support-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.support-card p {
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.support-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.support-card a:hover {
    text-decoration: underline;
}

.faq {
    margin-top: 1rem;
}

.faq-item {
    margin-bottom: 1.5rem;
}

.faq-item strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.faq-item p {
    color: var(--text-gray);
    margin: 0;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: var(--bg-light);
    text-align: center;
}

.download h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.download > p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.app-store-badge {
    display: inline-block;
    margin-bottom: 3rem;
    transition: transform 0.3s ease;
}

.app-store-badge:hover {
    transform: scale(1.05);
}

.app-store-badge img {
    height: 60px;
    width: auto;
}

.compatibility {
    max-width: 600px;
    margin: 0 auto 3rem;
    text-align: left;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
}

.compatibility h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.compatibility ul {
    list-style: none;
}

.compatibility li {
    color: var(--text-gray);
    padding: 0.5rem 0;
}

.more-apps {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
}

.more-apps h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.more-apps p {
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.more-apps a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

.more-apps a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.3rem;
    }

    .description {
        font-size: 1rem;
    }

    .nav-links {
        display: none;
    }

    .feature-grid,
    .support-content {
        grid-template-columns: 1fr;
    }

    .app-info {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero {
        padding: 60px 0;
    }

    .features,
    .privacy,
    .terms,
    .support,
    .download {
        padding: 60px 0;
    }
}