:root {
    --primary-color: #007AFF;
    --background-color: #F5F5F7;
    --text-color: #1D1D1F;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}

header {
    text-align: center;
    padding: 6rem 2rem;
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-icon {
    width: 180px;
    height: 180px;
    border-radius: 40px;
    margin-bottom: 2rem;
}

.tagline {
    font-size: 1.5rem;
    color: #666;
    margin-bottom: 2rem;
}

.cta-buttons {
    margin: 2rem 0;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.screenshot-gallery img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.app-store-link {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.2rem;
}

.app-store-link:hover {
    opacity: 0.9;
    transform: scale(1.02);
    transition: all 0.2s ease;
}

.contact {
    text-align: center;
    background: white;
    padding: 3rem;
    border-radius: 12px;
    margin-top: 4rem;
}

.contact ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

footer {
    text-align: center;
    padding: 2rem;
    color: #666;
}

@media (max-width: 768px) {
    header {
        padding: 3rem 1rem;
    }
    
    .hero-icon {
        width: 120px;
        height: 120px;
    }
    
    main {
        padding: 1rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .contact ul {
        flex-direction: column;
        gap: 1rem;
    }
}

.top-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 1rem 0;
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 100;
}

.top-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: background-color 0.3s;
}

.top-nav a:hover {
    background-color: rgba(0, 122, 255, 0.1);
}

.top-nav .cta-button {
    color: var(--primary-color);
    font-weight: 600;
}

.hero {
    padding: 8rem 2rem 4rem;
    text-align: center;
}

.hero-description {
    max-width: 600px;
    margin: 1rem auto;
    font-size: 1.2rem;
    color: #666;
}

.benefits {
    background: white;
    padding: 4rem 2rem;
    margin: 4rem 0;
}

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

.benefits-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.benefits-list li {
    font-size: 1.1rem;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 8px;
}

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

.support-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: left;
}

.support-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    gap: 2rem;
    text-align: center;
    padding: 3rem 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

@media (max-width: 768px) {
    .top-nav {
        justify-content: center;
    }
    
    .benefits-list {
        grid-template-columns: 1fr;
    }
}